Filter for broadcast receiver tuner

Details Filter for broadcast receiver tuner Filter for broadcast receiver tuner

2007-01-02

2007-01-02

Nguyen, Tony T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S136000, C455S323000, C327S052000, C327S552000, C330S252000, C330S305000

Reexamination Certificate

active

10051445

ABSTRACT:
A Gaussian family filter (e.g. an equiripple filter) comprises a first pole, a second pole, a third pole and a signal combiner. The first pole has a biquadratic low pass characteristic and is configured to provide a first low pass signal. The second pole is coupled to the first low pass signal, the second pole having a first-order low pass characteristic, and providing a second low pass signal and a high pass signal. The third pole is coupled to the second low pass signal and has a biquadratic low pass characteristic for generating a third low pass signal. The signal combiner is configured to combine the third low pass signal and the high pass signal to provide a combined signal.

REFERENCES:
patent: 4320345 (1982-03-01), Waggener
patent: 6031878 (2000-02-01), Tomasz et al.
patent: 6069522 (2000-05-01), Venkatraman et al.
patent: 6112125 (2000-08-01), Sandusky
patent: 6239653 (2001-05-01), Rezzi et al.
patent: 6677822 (2004-01-01), Hasegawa

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