Cmos gates

Nowadays CMOS Small Scale Integration (SSI) logic families, I.E. the gates used in external logic, offer very fast speeds and high current drive capability as well as supporting the low voltages ...

CMOS gate inputs draw far less current than TTL inputs, because MOSFETs are voltage-controlled, not current-controlled, devices. CMOS gates are able to operate on a much wider range of power supply voltages than TTL: typically 3 to 15 volts versus 4.75 to 5.25 volts for TTL. gate. nMOS i-V Characteristics. iDS. G D. v S. Remember the resistor? nMOS is still a device VDS. Defined by its relationship between current and voltage. But it has 3 terminals! Current …Microprocessors are built out of transistors. In particular, they are constructed out of metal-oxide semiconductor (MOS) transistors. There are two types of MOS transistors — positive-MOS (pMOS) and negative …Question 4. The simplest type of digital logic circuit is an inverter, also called an inverting buffer, or NOT gate. Here is a schematic diagram for an inverter gate constructed from complementary MOSFETs (CMOS), shown connected to a SPDT switch and an LED: Determine the status of the LED in each of the input switch’s two positions. CMOS is a type of MOSFET, where its fabrication process uses complementary & symmetrical P-type & N-type MOSFET pairs for logic functions. The main CMOS devices characteristics are consumption of low static power & high noise immunity. The inverter is accepted universally as the basic logic gate while performing a Boolean operation on a single ... Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices" Data sheet acquired from Harris Semiconductor CD4071B, CD4072B and CD4075B OR gates provide the system designer with direct implementation of the positive-logic OR function and supplement the existing family of ...

How to size CMOS logic gates • Proceed from start to end; assume that unit-size gate has drive strength of inverter • Find sizing for first stage: • General formula: 462 input capacitance of reference inverter equal to input capacitance of chain C g1 input capacitance of 2 nd gate Summary 463 Sutherland, Sproull Harris Term Stage ... Jul 20, 2021 · A CMOS is fabricated on a substrate that acts as an electrical reference and gives mechanical support. A cross-section slices the wafer through the middle of the transistor and looks at it on its side. Figure 5 is a crude cross-section of a CMOS gate where both the NMOS and PMOS transistors are implemented on the same chip. A p-channel is ... How to size CMOS logic gates • Proceed from start to end; assume that unit-size gate has drive strength of inverter • Find sizing for first stage: • General formula: 462 input capacitance of reference inverter equal to input capacitance of chain C g1 input capacitance of 2 nd gate Summary 463 Sutherland, Sproull Harris Term Stage ... Before the mid-1990s, logic technology nodes were synonymous with the gate length of the CMOS transistors they produced. Actual gate lengths shrunk faster for a while, then stopped shrinking.Jul 26, 2023 · Basic CMOS Logic Gates. Let us now discuss the basic CMOS logic gates in detail. CMOS OR Gate. The OR gate is a basic logic gate in digital electronics. OR gates produce a high or logic 1 output when any of its inputs is high, and it produces a low or logic 0 output when all of its inputs are low. The truth table of a two-input OR gate is given ... CMOS NAND Gate The below figure shows a 2-input Complementary MOS NAND gate. It consists of two series NMOS transistors between Y and Ground and two parallel PMOS transistors between Y and VDD. CMOS NAND Gate If either input A or B is logic 0, at least one of the NMOS transistors will be OFF, breaking the path from Y to Ground. Using CMOS, a single gate (a circuit with one pullup network and one pulldown network) can only implement the so-called inverting functions where rising inputs lead to falling outputs and vice …

1-32. describe the operation and utility of a transmission gate 1-33. define high-impedance state and describe the operation of a tri-state buffer 1-34. define open drain as it applies to a CMOS logic gate output and calculate the value of pull-up resistor needed 1-35. describe how to create “wired logic” functions using open drain logic gates This article lists 75 CMOS MCQs for engineering students.All the CMOS Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the CMOS.. The CMOS is used to …CMOS Gate Characteristics Jacob Abraham, September 10, 2020 10 / 39 Load Line Analysis To nd the Vout for a givenVin For a givenVin, plot Idsn, Idsp vs. Vout Vout must be wherejcurrentsj are equal in the graph below ECE Department, University of Texas at Austin Lecture 5. CMOS Gate Characteristics Jacob Abraham, September 10, 2020 11 / 39 Oct 12, 2022 · CMOS NAND gate. The circuit shown below shows the circuit of the 2-input CMOS NAND gate. It has two p-channel MOSFETs (Q 1, Q 2) and two n-channel MOSFETs (Q 3 and Q 4). A and B are two inputs. The input A is given to the gate terminal of Q 1 and Q 3. The input B is given to the gate terminal of Q 2 and Q 4. The output is obtained from the ... We will stress the similarities and differences between the nMOS depletion-load logic and CMOS logic circuits and point out the advantages of CMOS gates with examples. In its most general form, a combinational logic circuit, or gate, performing a Boolean function can be represented as a multiple-input, single-output system, as depicted in the ...

Score ku kstate basketball game.

In this video, the CMOS logic gates are explained. By watching this video, you will learn how to implement different logic gates using CMOS logic gate.CMOS s...Coming to the CMOS Logic based XOR Gate IC, the CD4030 Quad 2-input XOR IC is a popular choice. 7486 Quad 2-Input Exclusive-OR Gate IC. IC 7486 is a quad 2-input XOR gate i.e., it contains four 2-input XOR Gates in a single package. The pin diagram and pin description of the IC is shown below. Pin Number:Feb 9, 2021 · CMOS gate arrays are completed by designing and stick to the top metal layers that offer the interconnecting ways to form logic gates such as NAND, NOR, XNOR, etc. There are new types of CMOS gate arrays in the market with having features with medium speed, wide operating voltages while ensuring a reliable CMOS process. CMOS Gates A logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compatible logic levels and power supply characteristics within a family.

Dynamic supply current is dominant in CMOS circuits because most of the power is consumed in moving charges in the parasitic capacitor in the CMOS gates. As a result, the simplified model of a CMOS circuit consisting of several gates can be viewed as one large capacitor that is charged and discharged between the power-supply rails.• CMOS/FET Transistors – ~10,000nm gates originally, now down to 90nm in production – scaling will stop somewhere below 30nm (over 100 billion trans./chip) • Future: – 3D CMOS (10 trillion …This article lists 75 CMOS MCQs for engineering students.All the CMOS Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the CMOS.. The CMOS is used to …How to size CMOS logic gates • Proceed from start to end; assume that unit-size gate has drive strength of inverter • Find sizing for first stage: • General formula: 462 input capacitance of reference inverter equal to input capacitance of chain C g1 input capacitance of 2 nd gate Summary 463 Sutherland, Sproull Harris Term Stage ...Iron fences and gates are a popular choice for homeowners looking to add security and style to their property. Not only do they look great, but they also provide a number of benefits that make them a worthwhile investment. Here are some of ...Mar 20, 2021 · 3.6: TTL NOR and OR gates. Let’s examine the following TTL circuit and analyze its operation: Transistors Q 1 and Q 2 are both arranged in the same manner that we’ve seen for transistor Q 1 in all the other TTL circuits. Rather than functioning as amplifiers, Q 1 and Q 2 are both being used as two-diode “steering” networks. The basic gates (AND, OR, NAND, NOR) have their deMorgan's equivalent. The basic gates are positive-input gates, which makes the deMorgan's symbols negative-input gates. Two ways to look at the same device. NAND gate \$ \overline {A\cdot B}\$ with deMorgan's \$ X = \overline A + \overline B\$ becomes a Negative-input OR gate.CMOS Quad 2-Input AND Gates. CD4081B. Feb. 2020 – R1.1. HTC. 1/9. FEATURES. • Wide Operating Voltage Range of 3.0V to 18.0V. • Maximum Input Current of 1µA at ...NOR Full adder Hardware description and pinout. NOR Gates are basic logic gates, and as such they are recognised in TTL and CMOS ICs.The standard, 4000 series, CMOS IC is the 4001, which includes four independent, two-input, NOR …Many gate technologies — e.g., CMOS — adhere to even tighter restrictions. Let’s look in detail at the switch configuration in a CMOS implementation of a NOR gate when both inputs are a digital 1. A high gate voltage will turn on NFET switches (as indicated by the red arrows) and turn off PFET switches (as indicated by the red X’s).

3 Jul 2022 ... What are the CMOS Logic Gates? In CMOS technology, both NMOS and PMOS transistors #CMOS #LOGICGATES #NAND #NOT.

Gate-source voltage V GS 1/κ Drain-source voltage V DS 1/κ Threshold voltage V TH 1/κ Doping concentration N A, N D κ Table 1.2 Scaling results for device characteristics. Performance of device Symbol Expression Scaling factor Number of devices per unit area N tr α1/(L W) κ2 Gate oxide capacitance per unit area C ox α1/t ox κ Gate oxide ...The Exclusive-NOR Gate function is a digital logic gate that is the reverse or complementary form of the Exclusive-OR function. Basically the “Exclusive-NOR Gate” is a combination of the Exclusive-OR gate and the NOT gate but has a truth table similar to the standard NOR gate in that it has an output that is normally at logic level “1 ...CMOS gates are able to operate on a much wider range of power supply voltages than TTL: typically 3 to 15 volts versus 4.75 to 5.25 volts for TTL. CMOS gates tend to have a much lower maximum operating frequency than TTL gates due to input capacitances caused by the MOSFET gates.Before the mid-1990s, logic technology nodes were synonymous with the gate length of the CMOS transistors they produced. Actual gate lengths shrunk faster for a while, then stopped shrinking.Basic CMOS Logic Gates. Let us now discuss the basic CMOS logic gates in detail. CMOS OR Gate. The OR gate is a basic logic gate in digital electronics. OR gates produce a high or logic 1 output when any of its inputs is high, and it produces a low or logic 0 output when all of its inputs are low. The truth table of a two-input OR gate is given ...Building a CMOS NAND Gate • Output should be low if both input are high (true) • Output should be high if either input is low (false) The gate delay of an inverter is the sum of the times it takes the gate to switch from a LO to a HI output, and from a HI to a LO output. To estimate these times for a CMOS gate we first note that during the LO to HI cycle, the load capacitance, CL, is charged from 0 V to VDD, which requires a total charge of CL VDD, through the p-Nowadays CMOS Small Scale Integration (SSI) logic families, I.E. the gates used in external logic, offer very fast speeds and high current drive capability as well as supporting the low voltages ...

Kansas sand.

Ku season tickets.

Logic gates are digital components that typically work two levels of voltage and determine how a component conducts electricity. Logic gates use Boolean equations and switch tables.Using lower threshold MOSFETs designed for interfacing with TTL and CMOS logic gates that have thresholds as low as 1.5V to 2.0V are available. Power MOSFETs can be used to control the movement of DC motors or brushless stepper motors directly from computer logic or by using pulse-width modulation (PWM) type controllers.Dynamic supply current is dominant in CMOS circuits because most of the power is consumed in moving charges in the parasitic capacitor in the CMOS gates. As a result, the simplified model of a CMOS circuit consisting of several gates can be viewed as one large capacitor that is charged and discharged between the power-supply rails.Traditional NOT gate (inverter) symbol. In digital logic, ... This schematic diagram shows the arrangement of NOT gates within a standard 4049 CMOS hex inverting buffer. The inverter is a basic building block in digital electronics. Multiplexers, decoders, state machines, and other sophisticated digital devices may use inverters. ...CMOS NAND Gate I-V Characteristics of n-channel devices V DD V DS1 M 3 4 M 2 M 1 V M V M V M (a) I D I D1 = I D2 V GS2 = V M − V DS1 V GS1 = V M V DS (b) + − gate source gate drain V M V M V M L 1 2 + gate source gate drain V M L 1 L 2 (b) (a) n M 1 M 2 M 1 M 2 • Effective length of two n-channel devices is 2Ln •Kneff = kn1/2 = kn2/2 ...The Computer Engineering Research Center at UT Austin3. CMOS Logic Gate Circuit (1) NAND Gate Circuit. The figure below is a 2-input CMOS NAND gate circuit, which includes two series N-channel enhancement MOSFETs and two parallel P-channel enhancement MOSFETs. Each input terminal is connected to the gate of an N-channel and a P-channel MOSFET. Figure 5. 2-input CMOS NAND Gate Logic DiagramNAND gates are worse than CMOS NANDgates. Since pseudo-NMOS logic con-sumes power even when not switching, it is best used for critical NOR functions where it shows greatest advantage. Similar analysis can be used to compute the logical effort of other logic tech-nologies, such as classic NMOS and bipolar and GaAs. The logical efforts should XOR gate. XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd. An XOR gate implements an exclusive or ( ) from mathematical logic; that is, a true output results if one, and only one, of the inputs to the gate is true.Static CMOS Logic Gates • These are the most common type of static gates • Can implement any Boolean expression with these two gates • Why is static CMOS so popular? –It’s very robust! –it will eventually produce the right answer –Power, shrinking V DD, more circuit noise, process variations, etc. limit use of other design styles ... ….

CD4011B, CD4012B, and CD4023B NAND gates provide the system designer with direct implementation of the NAND function and supplement the existing family of CMOS gates. All inputs and outputs are buffered.• Complementary MOS = CMOS technology uses both p-& n-type transistors 4 N-type Off Insulator ... +P-type channel created+ + + + — CMOS Notation N-type P-type Gate input controls whether current can flow between the other two terminals or not. Hint: the “o” bubble of the p-type tells you that this gate wants a 0to be turned on 5 gateJul 20, 2021 · A CMOS is fabricated on a substrate that acts as an electrical reference and gives mechanical support. A cross-section slices the wafer through the middle of the transistor and looks at it on its side. Figure 5 is a crude cross-section of a CMOS gate where both the NMOS and PMOS transistors are implemented on the same chip. A p-channel is ... Dynamic power includes a short circuit power component. It occurs in CMOS when input of gate switches. When both pullup and pulldown networks are conducting for a small duration and there is a direct path b/w VDD to VSS. during this scenario spikes will be generated momentarily in the current as shown in fig below.The current is flowing from VDD to VSS …NAND gates are worse than CMOS NANDgates. Since pseudo-NMOS logic con-sumes power even when not switching, it is best used for critical NOR functions where it shows greatest advantage. Similar analysis can be used to compute the logical effort of other logic tech-nologies, such as classic NMOS and bipolar and GaAs. The logical efforts shouldCMOS OR Gate The OR gate is a basic logic gate in digital electronics. OR gates produce a high or logic 1 output when any of its inputs is high, and it produces a low or logic 0 output when all of its inputs are low. The truth table of a two-input OR gate is given below.CMOS Gates: Equivalent Inverter • Represent complex gate as inverter for delay estimation • Typically use worst-case delays • Example: NAND gate – Worst-case (slowest) pull-up: only 1 PMOS “on” – Pull-down: both NMOS “on” W N W N W P W P W P ½W NCMOS gate inputs draw far less current than TTL inputs, because MOSFETs are voltage-controlled, not current-controlled, devices. CMOS gates are able to operate on a much wider range of power supply voltages than TTL: typically 3 to 15 volts versus 4.75 to 5.25 volts for TTL. Sep 15, 2023 · Just like any other CMOS inputs, the reset pin12 must never be kept unconnected as it may give rise to unusual and unstable consequences. 3) CMOS 4016B Electronic Switch Gate Oscillator. One more CMOS device which you can use to construct a twin-gate RC square wave oscillator is the 4016B quad "analogue switch". Cmos gates, The Set State. Consider the circuit shown above. If the input R is at logic level “0” (R = 0) and input S is at logic level “1” (S = 1), the NAND gate Y has at least one of its inputs at logic “0” therefore, its output Q must be at a logic level “1” (NAND Gate principles). Output Q is also fed back to input “A” and so both inputs to NAND gate X are at logic level “1 ..., Sep 15, 2023 · Just like any other CMOS inputs, the reset pin12 must never be kept unconnected as it may give rise to unusual and unstable consequences. 3) CMOS 4016B Electronic Switch Gate Oscillator. One more CMOS device which you can use to construct a twin-gate RC square wave oscillator is the 4016B quad "analogue switch". , The Bill & Melinda Gates Foundation, based in Seattle, Washington, was launched in 2000 by Bill and Melinda Gates. The foundation is the largest private foundation in the world, with over $50 billion in assets. All lives have equal value, a..., 19 Jun 2015 ... We have also analyzed the transient response of logic gates designed using MeMOS logic circuits. MeMOS use CMOS 180 nm process with memristor to ..., CMOS Working Principle. In CMOS technology, both N-type and P-type transistors are used to design logic functions. The same signal which turns ON a transistor of one type is used to turn OFF a transistor of the other type. This characteristic allows the design of logic devices using only simple switches, without the need for a pull-up resistor., Lecture 10: Performance Optimization for Complex CMOS Gates. Reading: Chapter 4, sections 4.4-4.5. October 12, 2016. Weste & Harris. Prof. R. Iris Bahar., CMOS Inverter and Multiplexer 3.1 Basic characterization of the CMOS inverter An inverter is the simplest logic gate which implement the logic operation of negation. A logic symbol and the truth/operation table is shown in Figure 3.1. Two logic symbols, ‘0’ and ‘1’ are represented by IN OUT = IN IN OUT V IN V OUT 0 1 V L V H 1 0 V H V L, In CMOS logic, the IC of AND gate is 4081. This is a Quad 2-input IC that consists of four gates. The pin diagram of the IC is shown below: IC 4081. As there are four gates, pins 1 and 2 are the inputs of gate 1 and its corresponding output is at pin 3. In the same way, for gate 2, the inputs are at pins 5 and 6 and its corresponding output is ..., CMOS gate arrays are completed by designing and stick to the top metal layers that offer the interconnecting ways to form logic gates such as NAND, NOR, XNOR, etc. There are new types of CMOS gate arrays in the market with having features with medium speed, wide operating voltages while ensuring a reliable CMOS process. ..., CD4082B Dual 4-Input AND Gate Data sheet acquired from Harris Semiconductor CD4073B, CD4081B and CD4082B AND gates, provide the system designer with direct implementation of the AND function and supplement the existing family of CMOS gates., what is the point of using two inverters? Why can't I just draw a buffer? A single buffer is only one gate, not a 'combination'. In practice a CMOS buffer is made from two inverters, so the answer given is the simplest …, 1. 1. 0. Boolean Expression Q = not A or A. Read as inverse of. A gives Q. The operation of the above Digital Logic Gates and their Boolean expressions can be summarised into a single truth table as shown below. This truth table shows the relationship between each output of the main digital logic gates for each possible input combination., DESIGNING COMBINATIONAL LOGIC GATES IN CMOS. In-depth discussion of logic families in CMOS—static and dynamic, pass-transistor, nonra-. n. tioed and ratioed logic. n. Optimizing a logic gate for area, speed, energy, or robustness Low-power and high-performance circuit-design techniques., CMOS. Complimentary MOS (CMOS) • Other variants: NMOS, PMOS (obsolete) • Very low static power consumption • Scaling capabilities (large integration all MOS) • Full swing: rail-to-rail output • Things to watch out for : – don’t leave inputs floating (in TTL these will float to HI, in CMOS you get undefined behaviour), CMOS Gate Characteristics Jacob Abraham, September 10, 2020 10 / 39 Load Line Analysis To nd the Vout for a givenVin For a givenVin, plot Idsn, Idsp vs. Vout Vout must be wherejcurrentsj are equal in the graph below ECE Department, University of Texas at Austin Lecture 5. CMOS Gate Characteristics Jacob Abraham, September 10, 2020 11 / 39, As with the NAND gate circuit above, initially the trigger input T is HIGH at a logic level “1” so that the output from the first NOT gate U1 is LOW at logic level “0”. The timing resistor, R T and the capacitor, C T are connected together in parallel to the input of the second NOT gate U2.As the input to U2 is LOW its output at Q will be HIGH.. When a logic level “0” …, Therefore, we get other gates, such as NAND Gate, NOR Gate, EXOR Gate and EXNOR Gate. Also Read: Transistor. OR Gate. In an OR gate, the output of an OR gate attains state 1 if one or more inputs attain state 1. The Boolean expression of the OR gate is Y = A + B, read as Y equals A ‘OR’ B. The truth table of a two-input OR basic gate is ..., Using lower threshold MOSFETs designed for interfacing with TTL and CMOS logic gates that have thresholds as low as 1.5V to 2.0V are available. Power MOSFETs can be used to control the movement of DC motors or brushless stepper motors directly from computer logic or by using pulse-width modulation (PWM) type controllers., Secondly CMOS has the huge advantage of very low power consumption when not switching, because the gate of a CMOS transistor is essentially a capacitor and passes no DC current and only one of the transistors is switched on at a time so there is no significant DC current by that path either., Mouser offers inventory, pricing, & datasheets for CMOS Logic Gates. Skip to Main Content (800) 346-6873. Contact Mouser (USA) (800) 346-6873 | Feedback. Change Location., Quad 2-Input NOR Gate High−Performance Silicon−Gate CMOS The MC74HC02A is identical in pinout to the LS02. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. Features • Output Drive Capability: 10 LSTTL Loads • Outputs Directly Interface to CMOS, NMOS, and TTL, Learn about gates built with the CMOS digital-logic family. Logic gates that are the basic building block of digital systems are created by combining a number of n- and p-channel transistors. The most fundamental connections are the NOT gate, the two-input NAND gate, and the two-input NOR gate. This article assumes a positive logic., A gate valve is designed to turn the flow of liquid through pipes on and off. It is generally used on a valve that is not used frequently. It is also helpful in controlling the flow of pressure through the pipes and valves., Static CMOS Circuit • At every point in time (except during the switching transients) each gate output is connected to either V DD or V SS via a low-resistive path • The outputs of the gates assume at all times the , The CD4081 is a CMOS chip with four AND gates. An AND gate is a logic gate that gives a HIGH output only when all its inputs are HIGH. This particular Integrated Circuit (IC) has four AND gates and each gate has two inputs. Therefore it’s often called a Quad 2-Input AND Gate. , Commonly used logic gates are TTL and CMOS. TTL, or Transistor-Transistor Logic, ICs will use NPN and PNP type Bipolar Junction Transistors. CMOS, or Complementary Metal-Oxide-Silicon, ICs are constructed from MOSFET or JFET type Field Effect Transistors. TTL IC's may commonly be labeled as the 7400 series of chips, while CMOS ICs may often be ..., General CMOS gate recipe Step 1. Figure out pulldown network that A does what you want, e.g., F = A*(B+C) (What combination of inputs B generates a low output) Step 2. Walk the hierarchy replacing nfets with pfets, series subnets with parallel subnets, and parallel subnets with series A subnets Step 3., This article shows some logic gates implemented with CMOS. The Exclusive OR Circuit (XOR) In an XOR circuit, the output is a logic 1 when one and only one input is a logic 1. Hence the output is logic 0 when both inputs are logic 1 or logic 0 simultaneously. Table 1 exhibits the truth table for an XOR circuit. Table 1., Static CMOS Logic Gates • These are the most common type of static gates • Can implement any Boolean expression with these two gates • Why is static CMOS so popular? –It’s very robust! –it will eventually produce the right answer –Power, shrinking V DD, more circuit noise, process variations, etc. limit use of other design styles ... , In this chapter, we explain the two types of power consumption found in a complementary metal-oxide-semiconductor (CMOS) circuit. In general, a CMOS circuit tends to dissipate power at all times—be it active or inactive. The power consumed by the circuit when it is performing computational tasks is known as dynamic power. On the contrary, …, – Intrinsic gate delay RC falls as 1/S: Good! – Intrinsic gate energy CV2 falls as 1/S3: Very Good! – Power (energy/delay) falls as 1/S2: Not Quite as Good… – Gate power density (power/gate area) fixed at 1: No worse than previous generations? • Real power drivers: bigger die, more gates, more leakage – secondary effects of scaling, The types of TTL or transistor-transistor logic mainly include Standard TTL, Fast TTL, Schottky TTL, High power TTL, Low power TTL & Advanced Schottky TTL. The designing of TTL logic gates can be done with resistors and BJTs. There are several variants of TTL which are developed for different purposes such as the radiation-hardened TTL packages ..., XOR gate. XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd. An XOR gate implements an exclusive or ( ) from mathematical logic; that is, a true output results if one, and only one, of the inputs to the gate is true.