Tuner circuit

Details Tuner circuit Tuner circuit

1986-11-28

1989-06-27

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455249, 455295, 455317, H04B 110

Patent

active

048436372

ABSTRACT:
A tuner circuit for converting the frequency of an input signal with a local oscillator to a predetermined channel frequency. The tuner circuit includes an attenuation circuit responsive to the input signal for controlling the attenuated level of the input signal for reducing cross modulation and intermodulation distortions of the circuit, and for reducing distortion from the interference of the local oscillation, an amplifier circuit coupled to the attenuation circuit for amplifying the attenuated input signal, and a frequency conversion circuit coupled to the amplifier circuit for converting the frequency of the amplified input signal to a corresponding predetermined channel frequency.

REFERENCES:
patent: 4090137 (1978-05-01), Soma et al.
patent: 4126828 (1978-11-01), Kumagai
patent: 4520507 (1985-05-01), Moon
patent: 4580288 (1986-04-01), Rinderle
patent: 4580290 (1986-04-01), Ushida
patent: 4661995 (1987-04-01), Kashiwagi
patent: 4665560 (1987-05-01), Lange
patent: 4691379 (1987-09-01), Shizume
patent: 4726072 (1988-02-01), Yamashita et al.
patent: 4776040 (1988-10-01), Ichikawa et al.

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