Design of bias circuit for OP-AMP

[wael_wael]

hi every body

i am starting design of bias circuit, it is necessary the bias circuit have phase margin and bandwidth same the op-amp
regards

 

[bigpop]

bias circuit just need low bandwidth

 

[jerryzhao]

Which type bias circuit you used. Is there closed loop in you bias ciurct. Don,t care the phase margin if no closed loop. And the bias's bandwidth is not related to OP usually. As bias circuit supply DC bias usually.

 

[neo79]

as long as you are not using a loop to regulate the bias, there is no concern of phasemargin for biasing circuit.

 

[crossbow_123]

hi every body

i am starting design of bias circuit, it is necessary the bias circuit have phase margin and bandwidth same the op-amp
regards

bias circuit needs no phase margin

 

[turtlewang]

Could you please tell me some types of bias circuit? I just know the bandgap reference and the current source bias. Can you give me more hint?

Which type bias circuit you used. Is there closed loop in you bias ciurct. Don,t care the phase margin if no closed loop. And the bias's bandwidth is not related to OP usually. As bias circuit supply DC bias usually.