Voltage controlled oscillator with reduced number of tuning pote

Details Voltage controlled oscillator with reduced number of tuning pote Voltage controlled oscillator with reduced number of tuning pote

1980-11-03

1983-01-25

Grimm, Siegfried H.

Oscillators

With frequency adjusting means

Step-frequency change

331177V, 455186, 455195, 455199, H03B 100, H03J 500

Patent

active

043706290

ABSTRACT:
A VCO (Voltage Controlled Oscillator) is provided with a full set of tuning voltages from a reduced number of reference voltage sources, such as potentiometers. Logic controlled switch means delivers any of the reference voltages individually or predetermined combinations thereof as the tuning voltages to the VCO. A reference voltage source potentiometer is provided for each of the odd numbered tuning voltages, and a piecewise linear approximation is provided for the intermediate even numbered tuning voltages by generating the average of two adjacent odd voltages.

REFERENCES:
patent: 3999131 (1976-12-01), Fukuda et al.
patent: 4249255 (1981-02-01), Molinari

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