Hi there!
I'm working on a project that requires reading biomedical signals from the body, I'm making an analog front end with differential amplifier, bandpass filter, full wave rectifier, integrator and variable amplifier.
I'm testing the system with a sine wave. Everything is fine until the output of the rectifier - it seems extremely unstable! The amplitude after the bandpass filter is a 1.5v p-p sine wave and after the rectifier it ranges from 2.15 to 3.08V p-p but the shape of the waveforms is not very uniform
Any ideas?
Thanks
I'm working on a project that requires reading biomedical signals from the body, I'm making an analog front end with differential amplifier, bandpass filter, full wave rectifier, integrator and variable amplifier.
I'm testing the system with a sine wave. Everything is fine until the output of the rectifier - it seems extremely unstable! The amplitude after the bandpass filter is a 1.5v p-p sine wave and after the rectifier it ranges from 2.15 to 3.08V p-p but the shape of the waveforms is not very uniform
Any ideas?
Thanks
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