Hello, I'm trying to make a capacitance to voltage converter. I applied an AC source to a variable capacitor to generate an rms voltage proportional to the capacitance value. I then put that signal into a differential amplifier along with a rms voltage dependent on a reference capacitor. The differential amplifier tells me the voltage difference between the two signals. However, when I vary the capacitance slightly it takes about 5 seconds for the final rms output voltage to adjust. How can I minimize this delay?
I attached a picture of my circuit.
Thank you,
CD
I attached a picture of my circuit.
Thank you,
CD
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