Tuner station selecting apparatus

Details Tuner station selecting apparatus Tuner station selecting apparatus

1990-02-20

1993-01-12

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4551651, 455265, 455316, H04B 116

Patent

active

051797291

ABSTRACT:
A tuner station apparatus includes a first mixer for combining an input signal and a first local oscillation signal, and a second mixer for combining an output of the first mixer and a second local oscillation signal. The first and second local oscillation signals are generated by first and second PLL circuits, respectively. Each of the first and second PLL circuits include a frequency divider, a variable frequency divider, a phase comparator, a low pass filter, and a voltage controlled oscillator. The frequency divider of the first PLL circuit has a higher frequency division ratio than that of the second PLL circuit.

REFERENCES:
patent: 3999130 (1976-12-01), Whisler
patent: 4512035 (1985-04-01), Victor et al.
patent: 4551856 (1985-11-01), Victor et al.
patent: 4556988 (1985-12-01), Yoshisato
patent: 4575761 (1986-03-01), Carlson et al.
patent: 4581643 (1986-04-01), Carlson

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