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Design >> Analog Design >> Single Ended Switched Capacitor Opamp to Differential Conversion
https://designers-guide.org/forum/YaBB.pl?num=1543451505

Message started by repah on Nov 28^th, 2018, 4:31pm

Title: Single Ended Switched Capacitor Opamp to Differential Conversion
Post by repah on Nov 28^th, 2018, 4:31pm

Hello,

I designed a single ended opamp sample/hold switched capacitor amplifier with sample capacitors and switches.

I want to convert it to a differential opamp.

What do I do to the current, the sampling caps, size of switches, load capacitance ? Can I just scale these from single ended design ?

Also, add Common Mode Feedback. Is this correct ?

Is this correct ? Did I forget anything ?

Thank you.

Title: Re: Single Ended Switched Capacitor Opamp to Differential Conversion
Post by repah on Nov 28^th, 2018, 4:55pm

This is the circuit I want to make differential.

See attached.