Question 4
a) Explain the operation of a CMOS transmissiongate, illustrating the component symbol, MOS transistor circuit andfunction table. [3 marks]
b) Draw the XNOR (F = (A.B + A.B) logic circuitimplemented using
CMOS transistor-based logic.
CMOS transmission gates.
Compare the transistor count for each implementation. [4marks]
c) Draw and label a CMOS transmission gatecircuit for a 4-to-1 multiplexer, using the following signalnames:
sel(1:0) input data path select signal
muxIn(3:0) 4 x 1-bit input data signals
muxOut 1-bit output data signal
Illustrate the state of all circuit nodes for the followinginput signal states: sel = “10â€, muxIn = “0101â€. [5marks]
