vinke
New Member
Hi,
I have a resistive sensor which needs to be excited with a small ac voltage(preferably not more than 2V pk-pk) at 1khz.I am thinking of using an ac bridge. I need to send the output of the bridge to A/D module of a microprocessor(PIC16F877A). Surely ill have to convert the ac output in dc and amplify that dc into an appropriate level with an instrumentation amplifier.But how do i convert that ac output(considering that at times it may be a very small value which is less than the forward voltage of a diode) into dc?
Any help will be greatly appreciated.
Thank you.
I have a resistive sensor which needs to be excited with a small ac voltage(preferably not more than 2V pk-pk) at 1khz.I am thinking of using an ac bridge. I need to send the output of the bridge to A/D module of a microprocessor(PIC16F877A). Surely ill have to convert the ac output in dc and amplify that dc into an appropriate level with an instrumentation amplifier.But how do i convert that ac output(considering that at times it may be a very small value which is less than the forward voltage of a diode) into dc?
Any help will be greatly appreciated.
Thank you.