Questions tagged [precision-rectifier]

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Double wave precision rectifier frequency response

To perform a didactic experience, I had to design a double wave rectifier by using op-amps (TL081). I choose to use two stages: a single wave precision rectifier (i.e. ideal diode) and an inverting ...
2
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2answers
91 views

Full wave rectification by opamp

I am trying to read a current waveform from a shunt resistor series with the power line. Using a full bridge rectifier, I got the following waveform: The waveform was sampled every 2 millisecond ...
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1answer
132 views

Precision Full-Wave Peak Detector component values

so, I am a beginner in electronics...hoping to find some help... here I've found a circuit that I want to use from LM 3915 datasheet..... but the problem is I don't have 0.2 and 0.47 Capacitors... ...
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2answers
66 views

Precision Rectifier confusion

Its been a while I took a long hiatus due to not having a scope any longer, but I finally saved up and got myself one. I was playing around with a precision rectifier (OPA350PA) and I came across ...
2
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3answers
241 views

Why is the output of the precision rectifier 0 when the diode does not conduct?

From Wikipedia: "When the input voltage is negative, there is a negative voltage on the diode, so it works like an open circuit, no current flows through the load, and the output voltage is zero." ...
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1answer
111 views

“gain error” of rectifier circuit

I did some soldering and breadboarding and implemented the precision rectifier circuit as presented in which was taken from an Burr-Brown Application note sboa068. R1, R2 and R3 are all 10k, the ...
1
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0answers
346 views

Precision absolute value circuits

I see several options for this; there is the TI's application bulletin (originally a Burr Brown App. Bull. from 1997) --- www.ti.com/lit/an/sboa068/sboa068.pdf There's LT's LT1001-based circuit: http:...
2
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3answers
346 views

AC Signal Conditioning for ADC (Design Choices)

I have a low frequency (50Hz) signal which can be positive or negative (centered around system ground) depending on the mode selected. The signal has a maximum amplitude of +/- 12V. So, just to be ...
0
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1answer
378 views

output offset: dual supply opamp running on single supply

I'm running a precision rectifier circuit on TL082. http://www.ti.com/lit/ds/symlink/tl082-n.pdf supplying dual supplies (+/-12V) has it working correctly, however a single supply(0-12V) does not. I'm ...
2
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1answer
2k views

design: low voltage clamp circuit (0-200mV)

I need a active safety circuit to clamp voltages to the range of 0-200mV, independent of temperature and very precisely. I have simulated, using TINA-TI, 4 precision clamps in series to do this, see ...
0
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1answer
612 views

How do we get output like that with full wave precision rectifier?

First of all look at my circuit. If we assume a sinusoidal signal as input Vin then the signals V01 and V02 should be like the signals shown in the picture. From the two signal how can we get the V0 ...
2
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2answers
2k views

OpAmp Precision Half Wave Rectifier

I am currently studying OpAmps and one of the topics that came up was the applications of OpAmp circuits. In particular, I was learning about precision rectifiers (using non-inverting version of it, ...
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3answers
921 views

Precision half wave rectifier

How does a precision half wave rectifier work? The one with a single diode. When the input goes positive, the output of the op-amp is a large positive signal which turns on the diode and completes ...
3
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3answers
1k views

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 ...