[SOLVED] switching on small voltages

[chatumal]

Hi, I want to switch on small voltages ie; less than 1V

I can't use a transistor because it has a saturation voltage.

eg:- if i want to switch on 0.7V. when the transistor is off I get 0.7V.
but when the transistor is on I get 0.2v instead of something more closer to 0V

how do I overcome this. are there transistors with very low saturation voltage like less than 100mV?

 

[chuckey]

Use analogue transmission gate like a 4066.
Frank

 

[chatumal]

Thanks Frank!

Chatumal