Tunable lowpass-highpass switching filter

Details Tunable lowpass-highpass switching filter Tunable lowpass-highpass switching filter

1986-05-29

1988-03-15

Masinick, Michael A.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455188, 455190, H04N 116

Patent

active

047318775

ABSTRACT:
A filter is used for multichannel communication receiver, e, g, a CATV converter, which is electronically switched for a lowpass or highpass configuration by switching diodes, and the rejection bandwidth is further controlled by varactor diodes depending on the receiving channel frequency. This reduces the modulation distortions such as composite second and third order inter-modulation and cross-modulation by limiting the number of channels processed by the receiver.

REFERENCES:
patent: 4247953 (1981-01-01), Shinagawa et al.
patent: 4361909 (1982-11-01), Theriault
patent: 4480338 (1984-10-01), Dobrovolny

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