How to choose Slew Rate for an OTA ???

[pelo]

ota slew rate

Hi,

i would like to know how can i choose the slew rate for an amplifier (OTA symmetric)

SR = B*I0 / C

I know B, and C (capacitance load ~ 50p) and i want to know a good slew rate for an OTA to calcultate my bias current and to size all the transistors of my ampliifer

Thanx

 

[elbadry]

This depends on your application. Do you expect to have a large signal driving the OTA?

Do you have a restriction on the settling time of the OTA?

 

[maharshi_qis]

it depends on system requirement ..
if u want high gain u need compromise interms of slew rate..
if u not at all concern abt gain then its better to choose some 500v/µs.
then iload= 25mA..correspondily u can stat design.

 

[satyasiva]

It depends on ur load. just go through ken martin's opamps.

 

[dodoro]

for fast input signal, slew rate is need large.
eg. vin=Asinwt, then slew rate must greater than Aw.
and for adc or switched-capcitor applications, the lager the slew rate, the smaller the time it needed for linear slew, and the more time left for settling to the required resolution