How are NMOS faster than PMOS?

[p_shinde]

NMOS and PMOS

hi

how r NMOS faster than PMOS, pls reply soon.

thanks in advance
Prasad

 

[carpa]

Re: NMOS and PMOS

Transient frequency of NMOS is larger than PMOS.

 

[IanP]

Re: NMOS and PMOS

Without going into too much baffling technical detail, NMOS devices (N for negative) use faster signal carriers - electrons, in PMOS (P for positive) devices the signal carriers are much slower "holes" ..

Regards,
IanP

 

[semi_jl]

NMOS and PMOS

You could look up it in any process book!

 

[carrot]

Re: NMOS and PMOS

Hi,

In silicon, Mobility of electrons is around 3 times faster than holes.
If you take an inverter, fall time is quick and rise time is more. In order to overcome this problem, Pmos is usually made twice that of nmos. That is why they say NMOS is faster than PMOS.

 

[funster]

Re: NMOS and PMOS

because the carrier in NMOS is electron and

the carrier in PMOS is hole, the electron's

moving speed is far more fast than hole.

then NMOS is faster.

best regards

hi

how r NMOS faster than PMOS, pls reply soon.

thanks in advance
Prasad