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. 29, 2005
Filed:
Dec. 30, 1999
Walter Rossi, Pozzo d'Adda, IT;
Ferdinando Lari, Vimercate, IT;
Carlo Antonini, Vanegono Inferiore, IT;
Pietro Consiglio, Milan, IT;
Luigi Vergani, Agrate Brianza, IT;
Walter Rossi, Pozzo d'Adda, IT;
Ferdinando Lari, Vimercate, IT;
Carlo Antonini, Vanegono Inferiore, IT;
Pietro Consiglio, Milan, IT;
Luigi Vergani, Agrate Brianza, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A subscriber's telephone system is presented that includes at least one driver circuit connected to Tip and Ring terminals. An additional network is connected between an output of the driver circuit and the Ring terminal. This additional network includes a suitably dimensioned capacitor and a diode limiter connected in parallel with each other to minimize the overall voltage while maintaining a desired battery mean value.