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Design >> Analog Design >> Feed-forward compensated opamp
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Message started by sujith on May 15^th, 2014, 12:31am

Title: Feed-forward compensated opamp
Post by sujith on May 15^th, 2014, 12:31am

In the very first paper on feed-forward compensated opamp, http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1175504, the transfer function with capacitive feedback is given as having single zero whereas I'm getting one more RHP zero. What's the catch?

Attached is the transfer function given in the paper.

Title: Re: Feed-forward compensated opamp
Post by leon_O on May 15^th, 2014, 12:42am

Where,

Title: Re: Feed-forward compensated opamp
Post by leon_O on May 15^th, 2014, 12:42am

Title: Re: Feed-forward compensated opamp
Post by leon_O on May 15^th, 2014, 12:45am

This is the opamp in feedback and the next one is the OTA used, for reference. Sorry for the multiple replies as I can't attach multiple files in one post. Thank you.

Title: Re: Feed-forward compensated opamp
Post by leon_O on May 15^th, 2014, 12:46am

OTA.