vielle568
Member
Hello Everybody,
I've been building a circuit for an experimental musical instrument (the yellow object in the photo on the left) that takes an input from a magnetic coil type pick-up (Humbucker). The signal passes through a pre-amp/low pass filter and is then chopped by an analog switch that is controlled by the rhythm. The signal then passes through a final stage (a mixer) for amplification before output.
All is working correctly when hooked up with the instrument but the output signal is very noisy with clicks coming from the analog switch. The audio signal is biased at half the Vcc voltage as the op amps work from a single supply. There's a schematic attached showing the basic details of the circuit.
If someone can tell me how to eliminate the noise I'd be most grateful. Thank you for your suggestions.
vielle568
I've been building a circuit for an experimental musical instrument (the yellow object in the photo on the left) that takes an input from a magnetic coil type pick-up (Humbucker). The signal passes through a pre-amp/low pass filter and is then chopped by an analog switch that is controlled by the rhythm. The signal then passes through a final stage (a mixer) for amplification before output.
All is working correctly when hooked up with the instrument but the output signal is very noisy with clicks coming from the analog switch. The audio signal is biased at half the Vcc voltage as the op amps work from a single supply. There's a schematic attached showing the basic details of the circuit.
If someone can tell me how to eliminate the noise I'd be most grateful. Thank you for your suggestions.
vielle568
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