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The full-wave rectification circuit with the absolute value

2015-01-01 01:24  
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The full-wave rectification circuit with  the absolute value of the idealized diode
Figure 1 is the absolute value circuit of the amplifier OP often mentioned on a good textbook, that is full-wave rectifier circuit. Circuit is constituted of half-wave rectifier circuit A1 and the addition circuit A2(for the subtraction operation when the sign is oppositive ) with OP amplifiers ideal diode.In this circuit when the input is positive half cycle, diode D1 turns on, the circuit will output the negative half-wave rectified wave. This signal adds input signal (R2 = 0.5R1 is necessary), which get a positive output. When the input is negative, diode D2 is not conducting, and inverting amplifier composed of the resistance R1, R3 begans to move.