Tuner for communications equipment

Details Tuner for communications equipment Tuner for communications equipment

1984-01-31

1986-05-20

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 455186, H03J 720, H04B 118

Patent

active

045906114

ABSTRACT:
An tuner unit is provided for communications receivers with automatic self-balancing of the individual high frequency filter circuits. An assigned frequency applied to the desired receiver channel is fed to the antenna input during the automatic balancing process. The voltage of this assigned frequency picked up at the output of the filter circuits changes according to a stepwise increase of a tuning voltage controlled by a microprocessor. The tuning voltage is applied to the filter circuit to be balanced via a digital-analog converter and via a switching means controlled by the microprocessor. The automatic balancing is provided by switching the switching means successively to connect to the individual filter sections.

REFERENCES:
patent: 4334323 (1982-06-01), Moore
patent: 4430753 (1984-02-01), Shiratani

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