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May 20th, 2019, 3:22am
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Fully Differential Opamp Simulation with Switched Capacitor CMFB (Read 699 times)
repah
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Fully Differential Opamp Simulation with Switched Capacitor CMFB
Dec 14th, 2017, 3:36am
 
Hello,

I am attempting to simulate this Fully Diffferential Opamp with SC CMFB.

I need to get the SNDR to 70dB.

Should I use Transmission Gates for the Switches shown in the figure below ?  What strategies can I use to increase the SNDR ?

Thank you in advance for advice and tips.

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dopamp.png
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repah
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Re: Fully Differential Opamp Simulation with Switched Capacitor CMFB
Reply #1 - Dec 16th, 2017, 11:01pm
 
My main issues is that when I use transmission gates in cmos for the switches I do not get the SNDR i want - should i use another form of switch like bootstrapped switches for the switches instead?
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