Electrical Engineering Stack Exchange
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Questions tagged [precision-rectifier]

A precision rectifier allows to rectify small input voltages, which are lower than a forward voltage drop of a diode.

Recommended reading

Application bulletin AB-121, precision absolute value circuits by Burr Brown, 1997

Video EEVblog #490. Peak Detector Circuit.

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Seeking circuit of precision rectifier (or absolute-value) with "high bandwidth"

I need to detect (convert to DC, or low frequency <1kHz) the amplitude of a signal. The signal at full-scale is quite large, being a 1MHz sine-wave, with zero-offset and peak-to-peak amplitude of 20.00V (+10V, -10V peaks). It sounds easy enough,…
Fabio Barone
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How to add gain to this op-amp based precision full wave rectifier?

The design for the rectifier is rather clever, and comes from TI's TIDU030: Precision Full-Wave Rectifier, Dual-Supply. It looks as follows: simulate this circuit – Schematic created using CircuitLab R2=R3=R4, and this rectifier has gain of +/-1.…
Kuba hasn't forgotten Monica
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How to improve this precision rectifier by further decreasing cross-over transition times?

The Circuit The rectifier comes from TI's TIDU030: Precision Full-Wave Rectifier, Dual-Supply application note. My "benchmark" used as a baseline for evaluation is as shown below, powered from +12V/-12V, with a 4u6/50V tantalum across…
Kuba hasn't forgotten Monica
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Full-wave precision rectifier - Noise on the output only on the rectified part

I have a simple full-wave precision rectifier made of two op-amps integrated into the OPA2810. The gain of the full-wave precision rectifier is 1. The circuit is the following: The positive supply is 5 V and the negative supply is 5 V. The…
Jess
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Half wave rectifier query

This is an ASK asynchronous demodulator In the circuit, we can see 3 differentiated parts: One half-wave rectifier, one envelop detector and a comparator. The circuit receives SIG which is a ASK modulated signal and demodulates it. I'm having…
john wickç
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Fullwave rectifier with active clamp

What is wrong with my simulation? I am simulating with LTspice the following circuit taken from "Art of Electronics 3ed" where my LTspice model looks as follows: What am I doing wrong as there can be seen some glitches at the output? My feeling…
abg1984
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How does this rectifier work, since the op-amp input is 0 V?

Consider the rectifier below. Both inputs for the op-amp are 0 V. There are two diodes, that only allow current if the potential difference over them is above 0.7 V. Also, V1 is a sinusoid. I don't quite understand how V3 and V2 vary for v1 > 0 and…
ludicrous
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Understanding the precision rectifier

In particular, I was trying to understand the behavior of this precision rectifier given an input wave \$V_{in}=V_{o}sin(\omega t)\$. To my understanding, the circuit reduces to what we have in the left for \$V_{in}>0\$ (first half-wave) and…
Essam
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Confusion in precision rectifier

I just started reading about operational amplifier from the book Fundamentals of Microelectronics by Behzad Razavi. I want a to get a better understanding of precision amplifiers and their design. The book this diagram as an example of a precision…
user215805
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Op Amp Precision Rectifier Question

I'm struggling a bit with op amps again! I'm trying to learn how to use an inverting precision amplifier, and I'm getting very confused about the operation of the op amp in a active rectifier configuration. I'm sure it's a simple answer and I'm…
AJ_Smoothie
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Peak detector and amplifier for electret microphone

I've designed a circuit for detecting peak levels of a electret microphone. I've tested the circuit before manufacturing 100 units and it worked nice. After testing the 100 PCB I've received, only 32 of them works as it's supposed to. The units…
Alpha
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Precision Rectifier Help

I'm building a "precision rectifier" using an op amp and some diodes. The schematic is attached. On a breadboard, this circuit behaves as expected, producing a clean, rectified sine wave. When I transfer the circuit to a protoboard, I get the signal…
user37662
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Voltage follower output half wave signal; how can I reduce the ringing on the output?

I have used a voltage follower with a TSH082. I was able to get a half-wave signal with some slight ringing on the output (shown below). Is there a way to reduce the ringing on the half-wave signal output? Single Supply Voltage follower Single…
Sam
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Voltage Follower vs Half Wave Rectifier

So I used a voltage follower with an input of a sine wave signal (positive and negative cycle) . The output was half wave signal which is what I wanted. Why do people use half wave precision rectifier signal over a voltage follower. It seems a lot…
Sam
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Precision half-wave rectifier / peak detector oscillation on positive cycle

I am having trouble building this precision half-wave rectifier to use to detect an AC peak on a real PCB: The "real" circuit uses an LM318 opamp, but in LTspice the LM308 appears to replicate the problem ok. The problem I am having is the output…
namezero
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