In: Electrical Engineering
Question 4
a) Explain the operation of a CMOS transmission gate, illustrating the component symbol, MOS transistor circuit and function table. [3 marks]
b) Draw the XNOR (F = (A.B + A.B) logic circuit implemented using
CMOS transistor-based logic.
CMOS transmission gates.
Compare the transistor count for each implementation. [4 marks]
c) Draw and label a CMOS transmission gate circuit for a 4-to-1 multiplexer, using the following signal names:
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 following input signal states: sel = “10”, muxIn = “0101”. [5 marks]