Differerntial demodulation using single-stage opamp and LPF.

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Alex_Khan

Joined May 27, 2020
52
Hello,
I am designing a differential isolator via a capacitive coupling technique in which a control signal is differentially modulated and coupled capacitively to the differential demodulator side.
I have designed a demodulator using single-stage Opamp and LPF [Schematics attached]. The problem is the LPF's output signal swings between 2.8V to 5 V. How can I make LPF's output signal swing between 0-5V?
By doing so will make the Schmitt trigger's job easy to retrieve the output signal.

Thanks.
 

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