Supply-noise-rejecting current source
Patent
·
OSTI ID:1484755
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.
- Research Organization:
- National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- NA0003525
- Assignee:
- National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
- Patent Number(s):
- 10,090,826
- Application Number:
- 15/660,296
- OSTI ID:
- 1484755
- Country of Publication:
- United States
- Language:
- English
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