Television – Receiver circuitry
Patent
1996-10-10
1999-11-02
Faile, Andrew I.
Television
Receiver circuitry
348705, H04N 544
Patent
active
059780495
ABSTRACT:
A circuit arrangement, for supplying an antenna signal to a receiver arrangement of a video recorder and/or to a television receiver, connected to the video recorder, includes a switching device by which, in the blocked state, the antenna signal can be applied only to the receiver arrangement of the video recorder and from this video recorder to the television receiver, and by which, in the conducting state, the antenna signal can be applied directly to the television receiver via this video recorder. To avoid unwanted low impedances at the input and the output, the switching device includes a series arrangement of, successively, a first capacitive switching element having a constant capacitance, at least one pair of second capacitive switching elements and a third capacitive switching element having a constant capacitance. Except for the first and last of the second capacitive switching elements in the series arrangement of all second capacitive switching elements, the second capacitive switching elements may be formed as capacitive diodes. It is thereby achieved that in the blocked state, a high ohmic capacitive switching element is always arranged between the input of the switching device and ground or between the output of the switching device and ground.
REFERENCES:
patent: 5706060 (1998-01-01), Ruitenburg
Faile Andrew I.
Goodman Edward W.
Le Uyen
U.S. Philips Corporation
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