Channel selector

Claim 2

A channel selector comprising an electronic tuner utilizing a voltage-variable capacity element; means for generating a plural number of channel selecting voltages corresponding to the receiving channels; switch means having a plurality of groups of first terminals and a plurality of second terminals for connecting selected terminals of said first groups of terminals to selected ones of said second terminal, each of said second terminals thereby being associated with a group of said first terminal for receiving AFC voltages; means for connecting each of said generated channel selecting voltages to a separate terminal of said plurality of groups of first terminals; an AFC compensation resistance network having a plurality of taps and exhibiting different resistance values at each of said taps; means connecting each of said taps of said AFC compensation resistance network to separate ones of said second plurality of terminals of said switch means; means for connecting said AFC compensation resistance network to said tuner, and means connected to said AFC voltage receiving terminal and to said AFC compensation resistance network for superimposing said AFC voltages on said selected channel selection voltage.

Claim 3

Channel selector according to claim 1 wherein the means for generating a plural number of channel selecting voltages includes a set of variable resistors.

Claim 4

Channel selector according to claim 1 wherein the means for generating a plural number of channel selecting voltages includes means for generating a voltage corresponding respectively to each group of the receiving channels to be selected, and means for finely adjusting each voltage corresponding to the receiving channel to be selected.

Claim 5

Channel selector according to claim 2 wherein said switch means comprises a first switch for switching the AFC compensation resistors and a second switch interlocked with said first switch for switching said set of variable resistors.

Claim 6

Channel selector according to claim 3 wherein said switch means comprises a first switch for switching the AFC compensation resistors, and for switching said means for generating said voltage corresponding respectively to every group of the receiving channels to be selected, and wherein said channel selection generating means comprises a second switch for switching said means for generating said finely adjustable voltage, said first and second switches being interlocked.

Claim 7

Channel selector according to claim 5 wherein said second switch includes an output terminal, said plurality of groups of first terminals comprises individual terminals for respective channels, wherein said means for generating the voltages corresponding to the groups of channels to be selected comprises a plural number of resistors connected to the respective individual terminals and to the output terminal of said second switch.

Claim 8

A channel selector for providing channel selecting voltages, comprising first and second intercoupled switch means each having a number of positions corresponding to the number of channels to be selected, a selector output terminal, an input terminal for receiving an AFC voltage, a terminal for receiving an input voltage, said first switch means having a first plurality of terminals provided in positions corresponding to the respective receiving channels, and a second plurality of output terminals provided in positions corresponding to each group of receiving channels and connectable to the respective first plurality of terminals in the respective switch positions, a network of compensating AFC resistors connected to said sElector output terminal and having a plurality of taps exhibiting different resistance values connected to said second plurality of output terminals, a separate voltage divider means connected to the terminals of the first plurality of terminals of each group of positions, a plurality of fine adjustment resistors, said second switch means selectively connecting said fine adjustment resistors between said terminal for receiving an input voltage and said voltage dividers, and resistor means for connecting said compensating AFC resistors of said second plurality of output terminals of the first switch means and said input terminal for receiving said AFC voltage.

Claim 9

A channel selector for providing channel selecting voltages, comprising first and second intercoupled switch means each having a number of positions corresponding to the number of channels to be selected, a selector output terminal, an input terminal for receiving an AFC voltage, a terminal for receiving an input voltage, said first switch means having a first plurality of terminals provided in positions corresponding to the respective receiving channels, and a second plurality of output terminals provided in positions corresponding to each group of receiving channels and connectable to the respective first plurality of terminals in the respective switch positions, a network of compensating AFC resistors connected to said sElector output terminal and having a plurality of taps exhibiting different resistance values connected to said second plurality of output terminals, a separate voltage divider means connected to the terminals of the first plurality of terminals of each group of positions, a plurality of fine adjustment resistors, said second switch means selectively connecting said fine adjustment resistors between said terminal for receiving an input voltage and said voltage dividers, and resistor means for connecting said compensating AFC resistors of said second plurality of output terminals of the first switch means and said input terminal for receiving said AFC voltage.

Claim 10

A channel selector circuit for providing channel selecting voltages, comprising a selector output terminal, a terminal for receiving an AFC voltage, a terminal for receiving an input voltage, N adjustable resistors, wherein N is the number of channels to be selected, a plurality of parallel voltage dividers corresponding to different groups of channels, first switch means having N positions for selectively connecting said adjustable resistors between said terminal for receiving an input voltage and said parallel voltage dividers, a network of AFC compensating resistors having a plurality of taps exhibiting different resistance values, second switch means intercoupled with said first switch means and also having N positions, said second switch means having N input terminals separated into groups of terminals connected to different voltage dividers, and means selectively connecting said taps of said AFC resistor network to said input terminals of said second switch whereby each AFC resistor network tap is selectively connected to the input terminals of a separate group of input terminals at the corresponding switch position, and resistor means for connecting the AFC resistor network to said terminal for receiving said AFC voltage.

Claim 11

A channel selector circuit for providing channel selecting voltages, comprising a selector output terminal, a terminal for receiving an AFC voltage, a terminal for receiving an input voltage, N adjustable resistors, wherein N is the number of channels to be selected, a plurality of parallel voltage dividers corresponding to different groups of channels, first switch means having N positions for selectively connecting said adjustable resistors between said terminal for receiving an input voltage and said parallel voltage dividers, a network of AFC compensating resistors having a plurality of taps exhibiting different resistance values, second switch means intercoupled with said first switch means and also having N positions, said second switch means having N input terminals separated into groups of terminals connected to different voltage dividers, and means selectively connecting said taps of said AFC resistor network to said input terminals of said second switch whereby each AFC resistor network tap is selectively connected to the input terminals of a separate group of input terminals at the corresponding switch position, and resistor means for connecting the AFC resistor network to said terminal for receiving said AFC voltage.