Title:
LINEAR POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/090616
Kind Code:
A1
Abstract:
A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; and a driver for driving the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage. The driver is provided with: a differential amplifier for outputting a voltage according to the difference between the voltage based on the output voltage and the reference voltage; a capacitor one end of which has an output of the differential amplifier applied thereto and the other end of which has the voltage based on the output voltage applied thereto; a converter for converting a voltage based on the output of the differential amplifier into an electrical current and outputting the electrical current; and an electrical current amplifier for amplifying the electrical current of the output of the converter. The supply voltage of the differential amplifier is a first constant voltage or the input voltage.
Inventors:
TAKOBE ISAO (JP)
YAMAGUCHI YUHEI (JP)
TATEISHI TETSUO (JP)
NAGATA TAKESHI (JP)
YAMAGUCHI YUHEI (JP)
TATEISHI TETSUO (JP)
NAGATA TAKESHI (JP)
Application Number:
PCT/JP2019/041712
Publication Date:
May 07, 2020
Filing Date:
October 24, 2019
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
G05F1/56
Foreign References:
| JP2003084843A | 2003-03-19 | |||
| JP2005339467A | 2005-12-08 | |||
| JPS60170821U | 1985-11-12 | |||
| JP2010277226A | 2010-12-09 | |||
| JP2016015076A | 2016-01-28 | |||
| JPH07121252A | 1995-05-12 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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