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:
Oct. 08, 1991
Filed:
Dec. 27, 1989
Applicant:
Inventor:
Mitsutoshi Sugawara, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03B / ; H03B / ;
U.S. Cl.
CPC ...
307270 ; 307516 ; 307520 ; 328 14 ;
Abstract
A switching transistor for driving an inductive load is switched on and off by a switching signal of a PWM signal or a signal equivalent to the PWM Signal. A frequency band of impulse noise components of the switching signal is above a frequency band used in an apparatus including the inductive load.