Radio-receiver or tuner provided with solid state memorizing means for a multiplicity of reception frequencies

Claim 1

A receiver-tuner comprising: first control means capable alternatively of assuming a manual condition and a memory condition; a clock generator for generating clock pulses; a binary counter, having a count input connected to said clock generator, a reset input, and an output, for counting the clock pulses and providing a count signal indicative thereof; momentary contact control means normally assuming a first condition and capable of momentarily assuming a second condition and connected to said binary counter reset input to reset said binary counter upon assuming its second condition; a digital-to-analog converter resistance network connected to said binary counter output for generating an analog count signal voltage indicative of the binary counter count signal; a variable voltage generator for generating a control voltage and including means for selecting the level of the control voltage; a voltage comparator having a first input connected to said variable voltage generator, for receipt of the control voltage therefrom, and having a second input connected to said resistance network, for receipt of the analog count signal voltage therefrom, for providing a first comparator output indication when the control voltage is greater than the count signal voltage and providing a second output indication when the control voltage is less than the count signal voltage; further control means connected to said first control means, to said momentary contact control means, to said voltage comparator, and to said clock generator and responsive to said momentary contact control means assuming its second condition while said first control means is in its memory condition to activate said clock generator to start generation of clock pulses, and responsive to said voltage comparator second output indication to deactivate said clock generator to stop generation of clock pulses; a digital memory having a plurality of storage locations, for storing signals indicative of a plurality of reception frequencies, and of a plurality of reception bands; manual key means coupled to said digital memory for selecting one of said plurality of storage locations; means coupling said binary counter output to said digital memory and responsive to actuation of said key means in a first meanner to select one of said plurality of storage locations and to write the count signal provided by said binary counter at the time said voltage comparator provides the second output indication into that selected one of said plurality of storage locations;