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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Analog Switch Offset https://designers-guide.org/forum/YaBB.pl?num=1415883000 Message started by bki on Nov 13th, 2014, 4:49am |
Title: Analog Switch Offset Post by bki on Nov 13th, 2014, 4:49am I have a problem with my integrated analog switches. I am using the PMOS configuration attached. The behavior that i want to have is: at first the output voltage should go down from 0V to -60V, afterwards it should go up from -60V to +180V. What my circuit does in reality is: It starts from -50V and goes down to -110V, afterwards it goes up from -110V to +120V. So, the problem is that it doesn´t start from zero, but from -50V instead. What can be the reason? I already tried to decrease the on resistance of transistors through increasing the transistor size, but this makes the functionality even worse. Can it be a problem of leakage, big Cds or charge injection? Does anyone have a simple solution? |
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