Title:
REFERENCE COMPARISON CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/184823
Kind Code:
A1
Abstract:
A reference comparison circuit, comprising a voltage detection module (1), a comparison module (2) connected to the voltage detection module (1), and an output module (3) connected to the comparison module (2), wherein the voltage detection module (1) comprises a voltage divider resistor, and the voltage detection module (1) is used to provide a first voltage related to an input voltage and a second voltage generated by the voltage divider resistor; the comparison module (2) comprises a current conversion module (2a) and a current mirror module (2b) connected to the current conversion module (2a), wherein the current conversion module (2a) is used to convert the second voltage into a corresponding first current and second current, and the comparison module (2) is used to compare the first current mirrored by the current mirror module (2b) to the second current, and output a voltage according to the comparison result; and the output module (3) is used to output a corresponding level value according to the output voltage. The present solution may omit a comparator circuit which occupies a larger chip area, and reduce the layout area.
Inventors:
LIU HAIBO (CN)
Application Number:
PCT/CN2020/132011
Publication Date:
September 23, 2021
Filing Date:
November 27, 2020
Export Citation:
Assignee:
NANJING HRM SEMICONDUCTOR CO LTD (CN)
International Classes:
G05F3/26
Foreign References:
| CN111061333A | 2020-04-24 | |||
| CN102882482A | 2013-01-16 | |||
| CN202471841U | 2012-10-03 | |||
| CN102609031A | 2012-07-25 | |||
| CN102393786A | 2012-03-28 | |||
| US6501299B2 | 2002-12-31 |
Attorney, Agent or Firm:
NANJING CIPIC INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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