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Patent Searching and Data


Title:
VOLTAGE REGULATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/033304
Kind Code:
A1
Abstract:
Disclosed is a voltage regulation circuit, comprising: a first switch unit (1), a second switch unit (2), a third switch unit (3), a first comparison control unit (4), a second comparison control unit (5) and a load (6), wherein the first switch unit and the second switch unit both receive a voltage input from a power supply (VDD) and are used for providing a first output voltage (VVDD) to the load; the first comparison control unit is connected to the first switch unit and is used for determining, based on the first output voltage, a first reference voltage (Vref1) and a second reference voltage (Vref2), a first bias voltage, so as to use the first bias voltage to control the magnitude of the equivalent resistance of the first switch unit by means of digital control; and the second comparison control unit is respectively connected to the third switch unit and the second switch unit and is used for determining, based on the first output voltage, a second output voltage (VDR) and a third reference voltage (Vref3), a second bias voltage, and using the second bias voltage to control the magnitude of the equivalent resistance of the third switch unit and the second switch unit by means of analog control. The voltage regulation circuit can ensure that a higher power supply rejection ratio is realized across a wide output current range.

Inventors:
TANG YANGYANG (CN)
YAO ENYI (CN)
ZHANG CHEN-XIONG (CN)
Application Number:
PCT/CN2017/097690
Publication Date:
February 21, 2019
Filing Date:
August 16, 2017
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M3/335; G05F1/563
Foreign References:
CN104850210A2015-08-19
CN106774587A2017-05-31
CN104079177A2014-10-01
US20090184697A12009-07-23
Other References:
See also references of EP 3672052A4
Attorney, Agent or Firm:
BEIJING SAN GAO YONG XIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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