PT or XG based MUX
When designing a 4:1 Mux which is better a Pass Transistor based or a
Transmission Gate ?
Area : PT is better
Delay : XG might be better and more symmetric
Power : PT would be better because of less cap and less VDD transition levels.
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posted by Rajan at 10:39 PM
1 Comments:
Buffering after 4:1 stages would be useful for a pT based 16:1 mux because in a PT based mux the output of the pass transistor tree has an inverter with a bleeder.
Thus it takes time for the output of the inverter to reach a good zero state.
If we have two inverters in the 16:1 then the LH transition after the first 4:1 is balanced by the good HL in the next 4:1.
8:43 AM
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