Means for linearizing a voltage variable capacitor controlled os

Details Means for linearizing a voltage variable capacitor controlled os Means for linearizing a voltage variable capacitor controlled os

1979-04-05

1981-05-26

Grimm, Siegfried H.

Oscillators

With distributed parameter resonator

331117D, 331177V, H03B 518

Patent

active

042700981

ABSTRACT:
Frequency modulation of an information signal is provided by applying the signal to series connected voltage variable capacity diodes. The reactance of the diodes is coupled through a transmission line to a cavity oscillator. The varying diode reactance causes a corresponding change in the frequency of modulation of the oscillator.
The improvement comprises a linearization potentiometer which couples to the diodes and provides a means to vary the effective impedance presented to the cavity oscillator such that a linear change in signal voltage applied to the diodes results in a linear change of oscillator frequency.

REFERENCES:
patent: 3353117 (1967-11-01), Renkowitz
patent: 3579281 (1971-05-01), Kam et al.
patent: 3631364 (1971-12-01), Schilb et al.
patent: 3697890 (1972-10-01), Healey et al.
patent: 3747032 (1973-07-01), Hall et al.
Otala, "Distortion and Its Compensation in a Varactor--Controlled Frequency Modulator", Proc. IEE, vol. 117, No. 2, Feb. 1970, pp. 338-342.

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