How to calculate the Resistor Values for an op amp circuit

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SUMMARY

This discussion focuses on calculating resistor values for an op-amp circuit as detailed in the article "A High Resolution Resistive Probe for Nonlinear Analysis of Two-Phase Flows" by L. Cantelli, A. Fichera, and A. Pagano. The user seeks to rectify a sinusoidal signal while maintaining a gain of 1, specifically in the context of a circuit that includes an instrumentation amplifier. The clarification on whether to implement full-wave or half-wave rectification is also addressed.

PREREQUISITES
  • Understanding of operational amplifier (op-amp) configurations
  • Knowledge of resistor value calculations for gain settings
  • Familiarity with signal rectification techniques
  • Basic principles of instrumentation amplifiers
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  • Learn about full-wave and half-wave rectification methods
  • Explore the design and function of instrumentation amplifiers
  • Study gain configurations in op-amp circuits
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Electrical engineers, circuit designers, and students working on op-amp applications, particularly those focused on signal processing and rectification techniques.

epcole
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I need help calculating the R values for this circuit from the following article:

AN HIGH RESOLUTION RESISTIVE PROBE FOR NONLINEAR ANALYSIS OF TWO-PHASE FLOWS
L. Cantelli, A. Fichera, A. Pagano

This is only a section of the circuit, there is more but I'm only interested in this part of it. I want to rectify a sinusoid and also to maintain a gain of 1. Has anyone come across something like this? There is an instrumentation amplifier before this but I'm not dealing with that in my project.

Thanks.
 
Last edited:
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epcole said:
I want to rectify a sinusoid and also to maintain a gain of 1.
You want to full-wave rectify it, or half-wave rectify it?
 

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