Nanoamp-level DC Current Power Supply Controlled by Microcontroller
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Abstract
This article presents a Nanoamp-level DC current power supply controllable via a microcontroller. It consists of 2-part which are V/I converters using AD844 and a control circuit. It is designed for practical use in electronic circuits that require a fixed rate and adjustable current source. In order to make the experiment more efficient, the designed current source can supply current 22 ports, 10 nanoamp level ports as follows: 100nA, 200nA, 300nA, 400nA, 500nA, 600nA, 700nA, 800nA, 900nA and 1000nA. The current fixed rate microamp 10 output ports consist of 10µA, 20µA, 30µA, 40µA, 50µA, 100µA, 150µA, 200µA, 250µA, and 300µA.The other two ports can supply adjustable current levels microamps from 0-220µA. From the results, the power supply gives the constant port accurately. The adjustable port has a maximum error of only 7.2%.
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References
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