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Precision Rectifiers
Precision Rectifiers
What are Precision Rectifiers?We know that the rectifiers are
the circuits which use diodes to convert AC to DC.The major
limitation of these circuits is that they cant rectify voltages
below 0.7V i.e. the cut-in voltage of the diode. Due to this, the
output of the conventional rectifier is distorted.To achieve
precision rectification we need a circuit which can precisely
rectify voltages having amplitude less than 0.7V.This can be
achieved by using op-amp along with diodes & these circuits are
called as precision rectifiers.
As shown in the figure, the non-inverting half wave rectifier
consists of a non-inverting amplifier with a diode in the feedback
loop of an op-amp.The analysis of this circuit can be done by
considering two cases:1. When input is positive (Vin>0V)2. When
input is negative (Vin0V)2. When input is negative (Vin
