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12.2.3 Transmission Gates
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A transmission gate (TG) is a bidirectional switch made of one NMOS and one PMOS in parallel.
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C and C’ are control signals.
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Circuit Diagram
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Advantages:
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1. Bidirectional: Can pass signals in both directions
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2. Full swing: Passes both 0 and 1 perfectly
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3. No threshold drop: PMOS passes 1, NMOS passes 0
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4. Low power: No static current
Verilog
Built-in CMOS Primitive
Verilog
2:1 Mux using Transmission Gates
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Circuit
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Verilog
Testbench
Verilog
4:1 Mux using Transmission Gates
Verilog
Bidirectional Bus using Transmission Gates
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It is a multi-master bus system.
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Verilog Implementation
Verilog
Testbench:
Verilog
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