Title:
MIXED SIGNAL CONTROL CIRCUIT FOR CANCELING DEGENERATE METASTABLE STATE OF BANDGAP REFERENCE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/142579
Kind Code:
A1
Abstract:
A digital and analog mixed signal control circuit for canceling degenerate metastable state of a self-biased bandgap reference circuit. One low power consumption digital-analog converter module of which the precision is flexibly customizable as required, one delay switch, and a nonvolatile storage unit are utilized to directly control and clamp a circuit node found in a degenerate metastable state in a bandgap reference circuit module, and a clamping control mechanism is released after a certain delay. This effectively inhibits the self-biased bandgap reference circuit having an operational amplifier from going into a degenerate metastable state, thus enhancing the robustness of the circuit, allowing the reference circuit to start normally under various circumstances, and increasing the performance and yield of a product.
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Inventors:
WU PATRICK BIAN (CN)
Application Number:
PCT/CN2021/123264
Publication Date:
July 07, 2022
Filing Date:
October 12, 2021
Export Citation:
Assignee:
EXCELIO TECH SHENZHEN CO LTD (CN)
International Classes:
G05F1/567
Foreign References:
| CN112698680A | 2021-04-23 | |||
| CN109917842A | 2019-06-21 | |||
| CN106155160A | 2016-11-23 | |||
| CN104090619A | 2014-10-08 | |||
| CN108227819A | 2018-06-29 | |||
| CN102385405A | 2012-03-21 | |||
| CN203982247U | 2014-12-03 | |||
| US7969127B1 | 2011-06-28 |
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