In rectifier circuits, the voltage drop that occurs with an ordinary semiconductor rectifier can be eliminated to give precision rectification by using operational amplifiers.
1) Precision Half-Wave Rectifiers
1.1) Saturating Precision Rectifier
1.1.1) Saturating precision half-wave rectifier circuit (voltage follower)
1.1.2) Saturating precision half-wave rectifier circuit with voltage gain
1.2) Nonsaturating Precision Rectifier
1.3) Two-Output Precision Rectifier
2) Precision Full-Wave Rectifiers
2.1) Half-Wave Rectifier and Summing Circuit
2.2) High Input Impedance Full-Wave Precision Rectifier