nobody
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Hello, all
I have a question about how to do the noise simulation of a "flip-around" SHA in the hold phase. To be more precisely, I question the total output noise @ the hold phase because the magnitude of noise is much larger than expected. If I hook up the circuit like Fig.1 called " charge transferred SHA" ,typically gain= cs/cf=2, the magnitude of output noise looks good. Fig.2 shows the way I did the simulation. An ideal cmfb is added and ideal baluns are used to convert differential and common signals. Thanks a lot.
*** spice deck *** vic vic 0 1 vid vid 0 ac .ac dec 100 1e3 100e9 .noise v(vod) vid
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