how to do ideal bias voltage for CMOS circuits??

[wael_wael]

Hi everybody,


how to do ideal bias voltage for CMOS circuits??

thanx

 

[A.Anand Srinivasan]

it is by maintaining your MOSs in the region of operation you want.... but current source biasing is better for MOS devices...

 

[wael_wael]

ok, i am try to bias my OTA without bias circuit, could you help me to that
thanx

 

[A.Anand Srinivasan]

for these kind of applications current mirror is the best way.... please post your proceeding in that particular ota....

 

[wael_wael]

for these kind of applications current mirror is the best way.... please post your proceeding in that particular ota....

fully differential folded cascode OTA

 

[amarnath]

take a unit bias current which is usually generated from a bandgap, then use this current to generate all the bias currents and bias voltages.Always look in terms of bias currents and not voltages.When i say this i mean, try to flow a particular value of current which you intend and then keep scaling the size to achieve minimum overdrive.


amarnath

 

[A.Anand Srinivasan]

i agree with amarnath.... that is what is usually done in CMOS circuits.... it is where we can bias a circuit to a particular region of operation using current....
I'll try and post whatever i can on ota circuits....

Regards
Anand.

 

[analog_prodigy]

You can use bandgap reference circuits for stable temperature compensated output voltage