Voltage controlled oscillator having approximately constant modu

Details Voltage controlled oscillator having approximately constant modu Voltage controlled oscillator having approximately constant modu

1982-08-19

1985-03-05

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular frequency control means

331117R, 331117FE, 331177V, 332 19, 332 30V, H03C 309, H03C 306, H03C 320, H03B 512

Patent

active

045034028

ABSTRACT:
A voltage controlled oscillator for use in a phase locked loop is provided with a first varactor circuit that responds to a control signal to set the center frequency of the oscillator, and with a second varactor circuit comprising a modulation varactor that responds to a modulation signal to cause the oscillator to produce a modulated output. The modulation sensitivity of the oscillator is made relatively constant between upper and lower center frequencies by applying a portion of the modulation signal to the first varactor circuit in addition to the control signal.

REFERENCES:
patent: 3544919 (1970-12-01), Stratman
patent: 4074209 (1978-02-01), Lysobey
patent: 4378534 (1983-03-01), Goedken et al.
Irvin, D. R. "F.M. Angle Modulator with Frequency Compensated Deviation" IBM Technical Disclosure Bulletin, vol. 21, No. 6, (Nov. 78), pp. 2482-2483.

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