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:
Aug. 13, 1985
Filed:
Jun. 30, 1983
Applicant:
Inventor:
Bernard Meunier, Le Chesnay, FR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 / ; 307311 ;
Abstract
A loop-circuit for a telephone line is provided that includes a transistor having a first electrode directly connected to one of the wires of the line, a second electrode connected to the other of the wires of the line by means of a resistor, a gate electrode thereof being connected via a resistor to one of the wires of the line, and by means of a capacitor to the other wire of the line, wherein a switch is arranged to cut-off the transistor and another switch is arranged or provided to disconnect one of the plates of the capacitor from the rest of the circuit.