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:
Mar. 13, 1979
Filed:
Oct. 26, 1977
Applicant:
Inventor:
Yuji Ikeda, Tokyo, JP;
Assignee:
Sansui Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
3302 / ; 330 10 ; 330251 ;
Abstract
A negative feedback operation of a PWM-type amplifier is stabilized by the use of a resistor. The input signal is voltage-compared with the triangular wave of a higher frequency than the input signal to form a PWM-signal, which is, in turn, power amplified and is provided to a load after demodulated by a low-pass-filter. A part of the output voltage is fed back from a common connection point of an inductor and a capacitor of an LC-filter forming the low-pass filter. A resistor is connected in series with the capacitor, and the negative feedback operation is, thereby, stabilized.