Half-wave rectifier circuit
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The precision half-wave rectifier inverts and transfers only the negative-half input of a time varying input signal (preferably sinusoidal) to its output. By appropriately selecting the feedback resistor values, different gains can be achieved. Precision half-wave rectifiers are commonly used with other op amp circuits such as a peak-detector or bandwidth limited non-inverting amplifier to produce a DC output voltage. This configuration has been designed to work for sinusoidal input signals between 0.2mVpp and 4Vpp at frequencies up to 50kHz.

  • 5V Split supply 
  • Input: +/-0.2mVpp to +/-4Vpp 
  • Output: 0.1V to 2V

Technical documentation
Application note (3)
Title Type Size (KB) Date
PDF 648 06 Mar 2020
PDF 440 24 Oct 2019
PDF 137 01 Feb 2019
Design files (1)
Title Type Size (KB) Date
ZIP 363 02 May 2018
E-book (1)
Title Type Size (KB) Date
PDF 11294 18 Feb 2019

Design tools & simulation (2)

Name Part Number Tool Type
Analog engineer's calculator  ANALOG-ENGINEER-CALC  Calculation tool 
SPICE-based analog simulation program  TINA-TI  Simulation tool 

TI Devices (6)

Part Number Name Product Family
MSP430FR2310  16 MHz integrated analog microcontroller with 2 KB FRAM, OpAmp, TIA, comparator with DAC, 10-bit ADC  Microcontrollers (MCUs) 
MSP430FR2311  16-MHz integrated analog microcontroller with 3.75-KB FRAM, OpAmp, TIA, comparator w/ DAC, 10-bit AD  Microcontrollers (MCUs) 
MSP430FR2353  24 MHz 105 C integrated analog microcontroller with 16 KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD  Microcontrollers (MCUs) 
MSP430FR2355  24-MHz 105-C integrated analog microcontroller with 32-KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD  Microcontrollers (MCUs) 
OPA2325  Dual precision, wide bandwidth, low noise, low power ADC driving op amp with RRIO and zero-crossover  Operational amplifiers (op amps) 
OPA322  20MHz Low-Noise 1.8V RRIO CMOS Operational Amplifier With Shutdown  Operational amplifiers (op amps) 

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