Title:
BANDGAP REFERENCE CIRCUIT WITH REDUCED FLICKER NOISE
Document Type and Number:
WIPO Patent Application WO/2021/153172
Kind Code:
A1
Abstract:
The present disclosure provides bandgap reference circuits having multi-level chopping actions to current mirror circuits for the purpose of reducing the flicker noise of the output reference voltage. A bandgap reference circuit includes a first current mirror including a pair of a first MOSFET and a second MOSFET, a second current mirror comprising a third MOSFET electrically connected to the first current mirror, and configured to provide a reference voltage at a drain, a first bipolar junction transistor electrically connected to the first current mirror, a second bipolar junction transistor connected to the first current mirror via a first resistor, a third bipolar junction transistor connected to the third MOSFET via a second resistor. The bandgap reference circuit further includes an operational amplifier to control the MOSFETs and a plurality of chopping switches configured to perform chopping actions on outputs of the first current mirror and the second current mirror.
Inventors:
IVANOV EVGUENI
Application Number:
PCT/JP2021/000203
Publication Date:
August 05, 2021
Filing Date:
January 06, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G05F3/30
Foreign References:
| US20110127987A1 | 2011-06-02 | |||
| US20130106389A1 | 2013-05-02 | |||
| US6462612B1 | 2002-10-08 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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