Radio-receiver or tuner provided with solid state memorizing mea

Details Radio-receiver or tuner provided with solid state memorizing mea Radio-receiver or tuner provided with solid state memorizing mea

1977-04-27

1979-01-30

Griffin, Robert L.

325459, 325464, 325468, H04B 126

Patent

active

041375025

ABSTRACT:
A radio-receiver or tuner provided with a solid state memory for a multiplicity of reception frequencies, comprising: a manual member for controlling a tuner having two different positions, namely manual and memory. The manual member in its "manual" condition is arranged for controlling a variable voltage generator arranged to supply a control voltage to tune variable reactances. A digital memory is provided for memorizing a plurality of signals corresponding to a plurality of reception frequencies and reception bands. The manual control member is arranged to cause the operation of a clock generator associated with a binary counter, the outputs of the counter being arranged to drive in a known way a digital-to-analog resistance network. A voltage comparator is arranged to signal the equality between the manually adjusted tuning control voltage and the voltage at the output from the resistance network. The system further includes means for controlling the writing in the memory of the count reached by the binary counter within the digital memory in correspondence with an address preselected through a multiplicity of keys controlling the digital memory. In its second position the manual member controls the memory so that the binary word from the memory will control the resistance network in order to "re-build" the control voltage of the tuning variable reactances.

REFERENCES:
patent: 3940702 (1976-02-01), Yoshimura et al.
patent: 3979680 (1976-09-01), Sakamoto
patent: 3990027 (1976-11-01), Kawashima
patent: 4061982 (1977-12-01), Kawashima

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