Full Wave Rectifier Circuit Using Op Amp. It requires a negative supply so the x1 amplifier can output a negative voltage of 0 5 times the input voltage. To make a full wave precision rectifier circuit i have just added a summing amplifier to the output of the previously mentioned half wave rectifier circuit.
From the point p1 to point p2 is the basic precision rectifier circuit and the diode is so configured that we get a negative voltage at the output. The op amps u 1a and u 1b buffer the input signal and compensate for the voltage drops across d 1 and d 2 allowing for small signal inputs. Here op amp a1 works as an inverting amplifier with gain r r 1 therefore output of op amp a1 is v 1 vin vin op amp a2 works as an inverting adder.
The resulting topology is shown on figure 4b.
For a negative input it is inverted by the op amp thus becomes a positive output of the opposite polarity passing through the diode. It is a non inverting amplifier circuit. R1 and r2 set the gain at 1 so a negative input compared to ground becomes a positive value at the output. Full wave precision half wave rectifier circuit using op amp basic diode rectifier.
