Analog Switch Help

[vinit2100]

i meant there should not be any voltage in the switch output, when no input . !!!!

 

[KrisBlueNZ]

Let's keep the conversation here.

I think I've been clear enough. I recommend switching the regulator output voltage the way I showed in post #11 but your design will work. When the regulators are OFF, there will be no voltage available at the output of the analogue switch, regardless of the state of the select input. That should be all you need to know.

i meant there should not be any voltage in the switch output, when no input . !!!!

Back in post #2 I said:

When both regulators are disabled, there is no voltage available on the B0 and B1 inputs of U21 so regardless of which pole is selected, its output cannot supply any voltage.

Perhaps I should have been clearer. When both regulators are disabled, the voltage at the "A" terminal of the switch will drop to 0V as the capacitance discharges through the voltage-setting resistors in whichever regulator is selected (according to the select input). So the voltage at the output of the switch will drop to zero when the regulators are disabled.

 

[vinit2100]

You know VDHL and FPGA design ?

 

[KrisBlueNZ]

No. I did a little bit many years ago, but not recently. Start a new thread describing what you want to do, and asking for help.

 

[vinit2100]

i have posted a thread on this please check "
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