OTA should always give CM output midway b/w rail to rail ??

[amic]

OTA Output CM level ??

Is it a must that OTA design should always give CM output midway between rail to rail ? I understand that it gives high ( max ) swing but I am biasing my output stage at 500nA because of which it seems difficult to get 1.8 V CM output. Instead it gives 2.4V. would it be a problem to bias/design class AB stage output in that case??

 

[vhdl00]

Re: OTA Output CM level ??

I want to know too.

 

[paulux]

Re: OTA Output CM level ??

I guess if your circuit does not need resistive load and the output loading capacitor is small that can allow you to set 0.5µA output biasing current. You can design any output current you want.