The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
Jul. 06, 2022
Will Semiconductor (Shanghai) Co. Ltd., Shanghai, CN;
Hiroyuki Kimura, Sendai, JP;
WILL SEMICONDUCTOR (SHANGHAI) CO. LTD., Shanghai, CN;
Abstract
A switch circuit includes: a p-channel pass transistor, in which the source is connected to a power source and the drain is connected to a load; and a gate drive circuit, which is connected to the gate of the pass transistor. The gate drive circuit includes: a first transistor, through which a first current is made to flow by turn-on of an on/off signal; and an amplifier, in which a reference voltage corresponding to the first current is input to the negative input end, and a gate voltage of the gate is input to the positive input end, and which controls a gate current from the gate by an output from the output end in a manner that the gate voltage matches the reference voltage, and is capable of setting a maximum current of the output. A soft-on time from turn-on of the on/off signal to turn-on of the pass transistor is set by setting the maximum current according to the gate capacitance of the pass transistor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile