Radio control circuit with microprocessor

Details Radio control circuit with microprocessor Radio control circuit with microprocessor

1977-03-23

1978-10-24

Griffin, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325455, 325464, 325468, 340324R, H04B 126

Patent

active

041223950

ABSTRACT:
An FM tuner control circuit contains a digital frequency synthesizing control circuit, digital computer means including a microprocessor, a memory circuit, and a manual control circuit for digitally tuning the tuner to any desired FM station. The memory circuit includes a read-only memory containing programs for the microprocessor and a random-access memory in which a group of predetermined station frequencies can be stored. The control circuit also includes a call letter display circuit, a frequency scale pointer display circuit, a frequency display circuit, a manual tuning circuit, and remote control switches for the manual control circuit.

REFERENCES:
patent: 3795863 (1974-03-01), Umeda et al.
patent: 3796951 (1974-03-01), Joseph
patent: 3835384 (1974-09-01), Liff
patent: 3962644 (1976-06-01), Baker
patent: 3983492 (1976-09-01), Fisher et al.
patent: 3986154 (1976-10-01), Yamada et al.
patent: 4015253 (1977-03-01), Goldstein

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