Title:
ON-VOLTAGE MEASUREMENT CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/181581
Kind Code:
A1
Abstract:
The present invention improves on-voltage measurement accuracy. An on-voltage measurement circuit (1) is provided with a sensing switch element (2), a control unit (3), a resistance element (4), and a voltage sensing unit (5). The control unit (3) has a signal output terminal (31) and a reference potential terminal (32), and controls the sensing switch element (2). The resistance element (4) is connected between a source terminal (2S) of the sensing switch (2) and the reference potential terminal (32). The resistance element (4) has a resistance value greater than an on-resistance of the sensing switch element (2). The control unit (3) turns on the sensing switch element (2) when a semiconductor switch element (9) is turned on. The voltage sensing unit (5) senses an on-voltage of the semiconductor switch element (9), connected between a drain terminal (2D) of the sensing switch (2) and the reference potential terminal (32), from a voltage (V4) across the resistance element (4) when both the semiconductor switch element (9) and the sensing switch element (2) are on.
Inventors:
MAEDA RYOSUKE
KINOSHITA YUSUKE
NAKAZAWA SATOSHI
KINOSHITA YUSUKE
NAKAZAWA SATOSHI
Application Number:
PCT/JP2022/007123
Publication Date:
September 01, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H03K17/08
Domestic Patent References:
| WO2008062800A1 | 2008-05-29 |
Foreign References:
| JPH1014099A | 1998-01-16 | |||
| JP2010035284A | 2010-02-12 | |||
| JP2012085131A | 2012-04-26 | |||
| JP2002369512A | 2002-12-20 | |||
| JPH11285238A | 1999-10-15 | |||
| US20170170824A1 | 2017-06-15 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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