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Title:
ANTI-ELECTROMAGNETIC INTERFERENCE BANDGAP REFERENCE CIRCUIT AND BATTERY MANAGEMENT CHIP
Document Type and Number:
WIPO Patent Application WO/2024/022369
Kind Code:
A1
Abstract:
An anti-electromagnetic interference bandgap reference circuit and a battery management chip for a battery management system. The bandgap reference circuit (1220) comprises a voltage generation circuit and an impedance compensation module (410). The voltage generation circuit comprises an operational amplifier, a first transistor, a second transistor, a first resistor, a second resistor, and a third resistor; the operational amplifier comprises an analog ground connection terminal, a first input end, and a second input end; the analog ground connection terminal is electrically connected to an analog ground terminal (1210); the first input end of the operational amplifier is electrically connected to a second end of the second resistor by means of the impedance compensation module (410), and the second input end of the operational amplifier is electrically connected to an emitter of the first transistor by means of the impedance compensation module (410); the impedance compensation module (410) is used for compensating for the difference between first alternating current impedance of the first transistor and second alternating current impedance of the second transistor; electromagnetic interference is coupled to the first input end and the second input end of the operational amplifier by means of the analog ground terminal (1210) and enters the voltage generation circuit.

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Inventors:
CHENG KUN (CN)
QIAN ZHUOWEN (CN)
Application Number:
PCT/CN2023/109244
Publication Date:
February 01, 2024
Filing Date:
July 26, 2023
Export Citation:
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Assignee:
DATANG NXP SEMICONDUCTORS CO LTD (CN)
International Classes:
G05F1/567
Foreign References:
CN115268556A2022-11-01
CN206948297U2018-01-30
US7436243B12008-10-14
JP2011170443A2011-09-01
CN112181038A2021-01-05
CN110199400A2019-09-03
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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