Can Modifying the Flexiforce Drive Circuit Enhance Sensor Performance?

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Modifying the Flexiforce drive circuit to a Wheatstone bridge or instrumentation amplifier could potentially enhance performance metrics like linearity, hysteresis, and repeatability. The original circuit is based on the manufacturer's data sheet, but some users have noted peculiarities in its design. Questions arise regarding the input/output characteristics of the operational amplifier used in the circuit. Understanding these characteristics is crucial for assessing potential improvements. Overall, exploring alternative circuit designs may yield better sensor performance.
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Attached is the Flexiforce drive circuit. I would like to ask whether I can improve improve the performance of Flexiforce in term of linearity, hysteresis, repeatability, or whatsoever other parameter by change the drive circuit to Wheatstone bridge or instrumentation amplifier?
 

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prescott2006 said:
Attached is the Flexiforce drive circuit. I would like to ask whether I can improve improve the performance of Flexiforce in term of linearity, hysteresis, repeatability, or whatsoever other parameter by change the drive circuit to Wheatstone bridge or instrumentation amplifier?

Where did you get that circuit from? A couple things look weird about it, obviously. What are the I/O characteristics of that opamp?
 
berkeman said:
Where did you get that circuit from? A couple things look weird about it, obviously. What are the I/O characteristics of that opamp?

I get it from Flexiforce data-sheet, that is their recommended excitation circuit. What are the things that look weird? What do you mean by I/O characteristic of the opamp?
 

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