Xor gate transistor diagram 4 transistors11/16/2023 If it’s HIGH state “1” then the NPN will turn on but there will be no Logic 0 to flow through the emitter. So Vcc will flow out to the inverter phase and it will invert into Low state “0” as output. When the inputs are same, if it’s LOW state “0” then NPN will never turn on because there be no HIGH state input at its base. The LOW state “0” flow through the emitter to the base of the 2nd NPN transistor and inverts into Logic HIGH state “1” as output. When inputs are different, the high state flow to NPN transistor’s base and turn it ON. It only inverts the output of the first NPN transistor. And the second NPN transistor is nothing more than just an Inverter. The first transistor is used for switching upon the input logic given to it. And the Low state will always flow out to the emitter of NPN transistor. The diodes are used in a bridge configuration (Rectifier) to sort out the input logic into the positive level, means if there is a High state input it will always flow to the base of NPN to switch it on. In which we have used two NPN transistors, 4 diodes and the resistor between Diode Bridge and NPN is used in series configuration because BJTs operates on input current, not input voltages. Schematic of XOR gate using Diodes and BJT (NPN transistor) is given below. International Electrotechnical Commission (IEC)/EUROPEANĬonstruction and Working Mechanism of XOR Gate XOR Gate Using BJT and Diodes There are 3 types of symbols used for XOR gate all over the world.Īmerican National Standards Institute (ANSI)/ MILITARY XOR Gate Logic Symbol, Boolean Expression & Truth Table XOR Gate Symbol XOR gate can have two or more than two inputs but it has only one output. XOR gate also known as Exclusive OR gate is “A logic gate which produces HIGH state ‘ 1’ only when there is an odd number of HIGH state ‘ 1’ inputs”.įor 2-input gate it can be interpreted as “when both of the inputs are different, then the output is HIGH state ‘1’ and when the inputs are same, then the output is LOW state ‘ 0’”. XOR Gate From other Logic Gates: (Combinational Logic).Construction and Working Mechanism of XOR Gate.XOR Gate Logic Symbol, Boolean Expression & Truth Table.What is Logic XOR or Exclusive-OR Gate?.
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