bki
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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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