## 3 Input XOR Gate CMOS Circuit

The XOR gate is a digital logic gate that outputs a high value (1) if and only if its two inputs are different. It is a fundamental building block of digital circuits and is used in a wide variety of applications, such as arithmetic logic units (ALUs), multiplexers, and decoders. A CMOS XOR gate can be implemented using two cross-coupled inverters, as shown in the figure below. When both inputs are low (0), both inverters are in their high-impedance state, and the output is also low. When one input is high (1) and the other is low (0), the output of the first inverter is high (1), which drives the input of the second inverter to low (0). This causes the output of the second inverter to be high (1), which drives the input of the first inverter to low (0). This process continues until the output of both inverters is high (1), and the output of the XOR gate is low (0). When both inputs are high (1), the output of the first inverter is low (0), which drives the input of the second inverter to high (1). This causes the output of the second inverter to be low (0), which drives the input of the first inverter to high (1). This process continues until the output of both inverters is low (0), and the output of the XOR gate is high (1). The CMOS XOR gate has several advantages over other types of XOR gates, such as the TTL XOR gate. CMOS gates are more efficient in terms of power consumption, and they are also less susceptible to noise. Additionally, CMOS gates can be implemented using a smaller number of transistors than TTL gates. CMOS XOR gates are used in a wide variety of applications, such as arithmetic logic units (ALUs), multiplexers, and decoders. They are also used in digital signal processing (DSP) applications, such as digital filters and modulators. ## Applications of the 3 Input XOR Gate The 3 input XOR gate is a versatile logic gate that can be used in a wide variety of applications. Some of the most common applications include: *### Arithmetic logic units (ALUs)

. The 3 input XOR gate is used in ALUs to perform the exclusive-OR operation. This operation is used to compare two binary numbers and to generate the carry bit for addition and subtraction operations. *### Multiplexers

. The 3 input XOR gate is used in multiplexers to select one of two or more input signals. This is done by using the control signal to enable the desired input signal and to disable the other input signals. *### Decoders

. The 3 input XOR gate is used in decoders to decode a binary code into a corresponding decimal number. This is done by using the binary code to select one of the outputs of the decoder. ## Conclusion The 3 input XOR gate is a fundamental building block of digital circuits. It is used in a wide variety of applications, such as arithmetic logic units (ALUs), multiplexers, and decoders. CMOS XOR gates are more efficient in terms of power consumption, and they are also less susceptible to noise than TTL XOR gates.4 Basic Digital Circuits Introduction To

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