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Title: Supply-noise-rejecting current source

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.
Inventors:
Issue Date:
OSTI Identifier:
1484755
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM) SNL
Patent Number(s):
10,090,826
Application Number:
15/660,296
Contract Number:
NA0003525
Resource Relation:
Patent File Date: 2017 Jul 26
Research Org:
National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English