Two-circuit resonant bandpass filter for television tuners

Details Two-circuit resonant bandpass filter for television tuners Two-circuit resonant bandpass filter for television tuners

1983-04-04

1986-02-25

Laroche, Eugene R.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455180, 455333, 334 60, 334 56, 334 47, H03J 500

Patent

active

045732116

ABSTRACT:
The invention relates to a two-circuit resonant bandpass filter for television tuners for switching a first frequency band to a second frequency band. The bandpass filter has a common primary circuit to which two secondary circuits are coupled, a first of the secondary circuits being connected via an electronic switch to the primary circuit which, together with the reactances of the first secondary circuit, short circuits, in the closed condition, the second secondary circuit.

REFERENCES:
patent: 3493870 (1970-02-01), Kupfer
patent: 4247953 (1981-01-01), Shinagawa et al.
patent: 4408348 (1983-10-01), Theriault
patent: 4418427 (1983-11-01), Muterspaugh

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