Hi,
i have a problem with analog switches.
I have two high voltage supply rails (-60V and +200V). I want to connect those rails to the load(5MOhm/10nF) through analog switches.
I already simulated it in Cadence with external NMOS transistors. That worked.
Now i try to integrate it with PMOS transistors (i only have integrated PMOS available).
What the circuit should do is: at first the output voltage should go from 0V to -60V, then afterwards from -60V to +200V.
What the circuit does in the simulation is: at first the output voltage goes from -50V to -110V, then afterwards from -110V to +120V.
I don´t understand why the output voltage starts at -50V and not at 0V. Do you have any idea what the problem is? And how can i resolve it?
i have a problem with analog switches.
I have two high voltage supply rails (-60V and +200V). I want to connect those rails to the load(5MOhm/10nF) through analog switches.
I already simulated it in Cadence with external NMOS transistors. That worked.
Now i try to integrate it with PMOS transistors (i only have integrated PMOS available).
What the circuit should do is: at first the output voltage should go from 0V to -60V, then afterwards from -60V to +200V.
What the circuit does in the simulation is: at first the output voltage goes from -50V to -110V, then afterwards from -110V to +120V.
I don´t understand why the output voltage starts at -50V and not at 0V. Do you have any idea what the problem is? And how can i resolve it?
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