Double duty capacitor circuit and method

Details Double duty capacitor circuit and method Double duty capacitor circuit and method

1995-01-30

1996-06-18

Hofsass, Jeffery

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379399, 379382, 333101, 333172, H04M 100, H01P 110, H03H 700

Patent

active

055286828

ABSTRACT:
A method and circuit in which two filters connected to different inputs that do not operate at the same time share a common capacitor to thereby reduce the number of capacitors needed for the circuit. A filter that is connected to an input that is not operating may be selectively disabled by connecting a resistor form the disabled filter and the common capacitor to ground when the other input is being operated. The method and circuit find application in a telephone system in which a filter connected to a subscriber line interface circuit (SLIC) and a filter connected to a telephone system circuit that does not operate at the same time as the SLIC share a common capacitor.

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