Digital potentiostat circuit and system

摘要

A small, portable, and inexpensive potentiostat circuit that is suitable for wide-spread electrochemical analysis is disclosed. The potentiostat may be fabricated as a stand-alone electrical component or it may be fabricated in conjunction with a Programmable System-on-Chip (SoC) to facilitate on-the-fly calibration and configuration.

主权项

1. A potentiostat circuit comprising:
a counter electrode; a working electrode; a reference electrode; a voltage source to supply an input voltage signal; a voltage feedback circuit to:
detect a reference voltage level at the reference electrode and a working voltage level at the working electrode; andgenerate a feedback voltage signal based on the reference voltage and working electrode levels; a voltage inverting circuit to supply a working voltage signal to the working electrode; a control amplifier to;
receive the input voltage signal and the feedback voltage signal;generate a control voltage signal based on the input voltage signal and the feedback voltage signal; andsupply the control voltage signal to the counter electrode; and a current measurement circuit to:
measure a current level at the working electrode; andgenerate an output measurement signal based on the current level, the output measurement signal indicating a change in the working voltage level.