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:
Feb. 05, 2019
Filed:
Nov. 03, 2017
Fuji Electric Co., Ltd., Kanagawa, JP;
Wataru Tomita, Nagano, JP;
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Abstract
A multiphase driver device includes: one phase driver circuit of a first type including a first monitoring transistor and a first monitoring resistor generating a first voltage that is proportional to a first source current supplied to a one of the plurality of semiconductor switches; and a plurality of phase driver circuits of a second type each including a second monitoring transistor and a second monitoring resistor generating a second voltage that is proportional to that a second source current supplied to corresponding one of the remaining semiconductor switches, each of the plurality of phase driver circuits of the second type further including a comparator that compares the second voltage to the reference voltage, and a first regulating transistor that adds a first regulating current to the second source current in accordance with an output of the comparator.