What happens if we interchange positions of pmos & nmos transistors in CMOS inverter?

[dBUGGER]

What happens if we interchange positions of pmos & nmos transistors in CMOS inverter?

Hi all,
What would happen if we interchange the positions of pmos and nmos transistor in a CMOS inverter. Will this still work as a proper inverter. Can somebody explain in detail? Thanks

Best Regards,

 

[masai_mara]

Re: CMOS inverter

No, it will work as a buffer after interchanging nmos and pmos. But still the operation wouldnt be rail to rail as the nmos transmits a weak '1' and pmos transmits a weak '0'.

 

[logicdrag]

CMOS inverter

there will be a threshold lost when transmits 0 by PMOS or transmit 1 by NMOS.

 

[funster]

Re: CMOS inverter

if you interchange the positions of pmos and nmos transistor in a CMOS inverter,
it will become a buffer,
and the buffer is not so good, because maximal output high level will be VCC - Vtt
(Vtt is NMOSFET's threshold voltage), minimal output low level will be
VSS + Vtp(Vtp is PMOSFET's threshold voltage).
this is the reason that in digital electronics a buffer
is made of two inverters, because the output voltage will
close VCC or GND.

best regards

Hi all,
What would happen if we interchange the positions of pmos and nmos transistor in a CMOS inverter. Will this still work as a proper inverter. Can somebody explain in detail? Thanks

Best Regards,

 

[nittinsharma80]

Re: CMOS inverter

It will act as a bad buffer with outputs ranging from Vdd - Vt to Vss + Vt