QA-TG & PTL

•PTLs are single FETs that pass the signal between the drain and source terminals, they cannot pass the ---------------------

• entire power range

• current range

• entire voltage range.

• entire frequency range

When B=1 , NMOS Turns ------------

• ON

• OFF

• HiZ

• LoZ

When B=0,NMOS turns-----

• Hiz

• ON

• OFF

• Loz

NMOS PTL passes ‘1’ with a threshold voltage drop of -----------

• VDD

• (VTn-VDD)

• VTn

• (VDD-Vtn)

NMOS transistor is not a good transfer of ---------

• logic 1

• logic 0

• Z

• X

PMOS is a poor transfer of ------------

• X

• Logic 1

• Logic 0

• HiZ

PMOS is a good transfer of ------------

• Logic 0

• Logic 1

• HiZ

• X

Advantages of Pass Transistor Logic is-------

• Less Voltage Loss

• Reduced no.of transistors

• Less voltage swing

• Less noise level

Applications of PTL are

• Multiplexer and Latches

• Adder

• Subtracter

• Shifter

-------consist of an NMOS and PMOS transistor wired in parallel  to eliminate the undesirable threshold voltage effects

• PTL

• Transmission gate (tg)

• Dynamic

• Domino