urgent...basics of cmos....

[nee_naresh04]

fnds can u clear me a big doubt where i got while i am telling cmos ckts for my fnds.. tell me the below state ment is right or wrong.."
"in cmos ckts always we take o/p at drain..and apply bias voltage always at source..".......

 

[satyakumar]

Itz correct

 

[rakesh1234]

ya it is correct because in cmos the pull up network is of ptype and pull down network is of n type
and for proper functioning we r tied the vdd to the source of the ptype and gnd to the source of n type
and taking o/p at drain of both n type and ptype which is tied together refer to the basic cmos inverter circuit

 

[p_shinde]

a terminal which is connected to higher voltage is drain.....and lower one is source........this should clear all doubts............i hope.....


thanks,
Prasad

 

[richardyue]

For the NMOS, the source is always connected to the lower voltage. For the PMOS, the sourse is always connected to the higher voltage.

 

[pratap_v]

what you said is correct. Always CMOS trans are connected in their common source mode for better voltage levels.

 

[p_shinde]

when we say in pmos termial having higher voltage is source............in college we r told.....as VDD is connected to " " terminal of PMOS...so its drain........and vice versa ...for NMOS.......


anyone ...pls comment on same....

 

[dsairajkiran]

itz correct