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danielje / ABE-Stat

Android project / application wireless interface to ABE-Stat Potentiostat
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Using a unipolar power supply to power the AMP, how does it output negative voltage? #4

Open GY-RX opened 3 years ago

GY-RX commented 3 years ago

I am learning this circuit, and I am very puzzled. When using the CV function, it is from -0.2V-0.6V. But how does the negative output generate when the positive voltage is supplied?

danielje commented 3 years ago

There is a virtual ground in the circuit used for analog portions (i.e. the actual potentiostat network), midway between the circuit ground and 3.3 V reference (so nominally relative to the virtual ground potentials can be applied between -1.65 V to 1.65 V).

GY-RX commented 3 years ago

Thank you very much for your reply! This is very helpful for my study.

danielje notifications@github.com 于2021年2月3日周三 上午4:55写道：

There is a virtual ground in the circuit used for analog portions (i.e. the actual potentiostat network), midway between the circuit ground and 3.3 V reference (so nominally relative to the virtual ground potentials can be applied between -1.65 V to 1.65 V).

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