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How to increase CMRR of a telescopic opamp?

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sarveshks2003

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Hi
I want to know how to increase CMRR of a telescopic opamp .
 

opamp

pay attention to the tail current source!
Its rds is the most important!
 

Re: opamp

make your input differential pair with big w/l, pay attention to the match of the current mirror, and you also need to reduce the system offset.
 

Re: opamp

CMRR can be increased by maintaining the higher differential gain than c ommon mode gain.
for that mismatech between mosfets should be avoided
 

Re: opamp

hi all,

To increase CMRR

make your input differential pair with big w/l, pay attention to the match of the

current mirror, and you also need to reduce the system offset.

thanx.....[/quote]
 

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