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Hello everyone
I have some problems while I implement the circuit in PSoC 1.
the sensor is a three electrode sensor. the RE is a reference electrode and the voltage is set to 2.5V, the WE is working electrode and it is connected to a trans-impendance amplifier. The TIA is Implemented by configuring a CT Block. while the sensor is working, the current flows from WE to CE. The problem is, for the CE, counter electrode, I don't know how to connect it to the amplifier U2-A in PSoC 1 because there is no plain opamp in PSoC 1. Is there anyone has any idea? Thanks!
Best regards
Li
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PSoC 1
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What is the part number of the sensor, maybe post its datasheet
or link to it ?
Regards, Dana.
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hello danaaknight
the sensor is a kind of electrochemical sensor to detect the CO gas. The datasheet is:
http://www.citytech.com/PDF-Datasheets/4cf .pdf
the problem now I'm facing is how to implement the opamp U2-A and the feedback resistor capacitor R1 R2 C3 C4 in PSoC. I have tried to configure an SC block according AN2223 but it seems not right...
best regards
Li
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This might be one possibility, but I would be concerned about the
noise generated by a switched C OpAmp. However 2 pole LP filter
inherent in the double RC might be enough to allevaite this.
Regards, Dana.