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LT1078 Absolute Value Circuit (Full-Wave Rectifier)

Absolute Value Circuit (Full-Wave Rectifier)

For negative inputs, the first section operates as a closed-loop inverter (A=-1) and the second stage is simply a buffer for the positive output. When the input signal is positive, the first opamp output remains saturated near ground and the diode becomes high-impedance, allowing the signal to pass directly to the buffer stage non inverted. The composite effect is a full-wave rectified waveform at the output of the buffer.




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