This simulation compares a diode rectifier and a precision rectifier using a 1 kHz sine input (purple). The red output from the diode rectifier shows distortion and reduced amplitude due to the diode’s 0.7 V drop, making it inaccurate for small signals. In contrast, the green output from the precision rectifier uses an op-amp to cancel out the diode drop, giving accurate rectification even at very low voltages. The diode rectifier is simple, low-cost, and easy to build but suffers from inaccurac

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