Supply-noise-rejecting current source
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.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1632584
- Patent Number(s):
- 10566936
- Application Number:
- 16/016,818
- Assignee:
- National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
- Patent Classifications (CPCs):
-
G - PHYSICS G05 - CONTROLLING G05F - SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03F - AMPLIFIERS
- DOE Contract Number:
- NA0003525
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 06/25/2018
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Wessendorf, Kurt O. Supply-noise-rejecting current source. United States: N. p., 2020.
Web.
Wessendorf, Kurt O. Supply-noise-rejecting current source. United States.
Wessendorf, Kurt O. Tue .
"Supply-noise-rejecting current source". United States. https://www.osti.gov/servlets/purl/1632584.
@article{osti_1632584,
title = {Supply-noise-rejecting current source},
author = {Wessendorf, Kurt O.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 18 00:00:00 EST 2020},
month = {Tue Feb 18 00:00:00 EST 2020}
}
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