Title:
START-UP CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/225094
Kind Code:
A1
Abstract:
Proposed is a start-up circuit with which the impact of variations of a threshold voltage of a transistor can be further reduced. A start-up circuit (100) is provided with: an N-type first MOS transistor (NM11) for which a threshold voltage is near 0 V; a resistor (RSTUP) interposed between a source terminal of the first MOS transistor and ground; and a control circuit (103) that controls a gate voltage of the first MOS transistor. The amount of a first current (start-up current) to be transmitted to a device (200) to be driven, the current being for starting up the device, is controlled in accordance with the control of the gate voltage.
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Inventors:
WATANABE HIROYUKI (JP)
Application Number:
PCT/JP2019/006918
Publication Date:
November 28, 2019
Filing Date:
February 22, 2019
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G05F3/26; H03F3/347
Foreign References:
| US20070164722A1 | 2007-07-19 | |||
| JP2013037435A | 2013-02-21 | |||
| JP2008154020A | 2008-07-03 | |||
| JP2002108468A | 2002-04-10 | |||
| JP2010198092A | 2010-09-09 | |||
| US5955874A | 1999-09-21 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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