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. 17, 1995
Filed:
Feb. 16, 1993
Applicant:
Inventors:
Pietro Consiglio, Milan, IT;
Carlo Antonini, Venegono Inferiore, IT;
Assignee:
SGS-Thompson Microelectronics S.A., Saint-Genis, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
379373 ; 379372 ; 379375 ; 379387 ; 361119 ;
Abstract
An acoustic feedback suppression device, particularly for auxiliary ringers in plug-in telephone systems, includes diodes in addition to a rectifier bridge of the ringer. The circuit provides direct-current decoupling and limits the AC voltage present across the auxiliary ringer.