Hi, all,

I designed a switch to switch off the capacitor, during the simulation when switch is off,  I found that the AC signal is almost blocked, with 0.9Vpp input to the switch, only 0.5mVpp passed, but the input signal has a dc level about 0.9V, and after the switch, it has a dc level about 0.4V, Can I consider the switch is off ? Since after swith is the capacitor, so I think the dc will not affect my ac operation , right ? Please give me some suggestions.Thank you very much.

james

Hi,

Since the switch is off, you basically have a capacitive voltage divider. Therefore you can easily calculate whether the 0.4V is reasonable or not.

Regards