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PSoC3 Op-Amp with strain gauge problem | Cypress Semiconductor

PSoC3 Op-Amp with strain gauge problem

Summary: 1 Reply, Latest post by pvkv on 06 Jan 2016 12:02 AM PST
Verified Answers: 0
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maxdamage's picture
47 posts

Hello everyone,

I'm designing system conditioning for a strain gauge transducer, I want a gain of about 200. the transducer power (Excitation voltage) I use from the PSoC itself of about 5 volt the output of the strainguage is connected to an Op-amp using different power options.

The problem is that when I use voltage from the VR for instance everything is alright but when I connect the output terminal of the transducer the voltage across them change and the output become fixed no matter I change the strain of the transducer.

Please assist.


pvkv's picture
Cypress Employee
82 posts


You will need differential measurement. Please refer to this article.


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