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May 23rd, 2019, 12:51pm
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Symmetric zeros, does it matter? (Read 77 times)
Jacki
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Symmetric zeros, does it matter?
Mar 13th, 2019, 7:55am
 
Hello,

   If we look at the two-stage differential-to-single-ended opamp, the first stage to the second stage is connected by the diode-connected current mirror, and in this way, we will get two symmetric zeros at the differential output of the first stage. I know this zero is at high frequency, but I wonder if the two zeros can be considered as a "common-mode zero", and for the differential signal the zero will not be harmful, and their influence cannot compensated?
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