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DOE OSTI · 1632584

Supply-noise-rejecting current source

Wessendorf, Kurt O.
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Abstract

Various technologies pertaining to a high-impedance current source are described herein. The current source outputs a substantially constant current by way of a first transistor that draws current from a supply. The current source is configured to feed-back noise from the supply to a feedback resistor at an input of an operational amplifier (op-amp) by way of a second transistor. The feedback resistor and the op-amp are configured such that responsive to receiving the supply noise feedback, the op-amp drives a gate voltage of the first transistor to cause the first transistor to reject the supply noise and cause the output of the current source to remain substantially constant.

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BibTeXRIS

Wessendorf, Kurt O.. 2020-02-18. Supply-noise-rejecting current source. https://www.osti.gov/biblio/1632584

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