Non-linearity correction in wide range voltage controlled oscill

Details Non-linearity correction in wide range voltage controlled oscill Non-linearity correction in wide range voltage controlled oscill

1977-07-28

1979-01-02

Kominski, John

Oscillators

Solid state active element oscillator

Transistors

331177R, 358 19, H03B 536

Patent

active

041329643

ABSTRACT:
A low-Q mechanical resonator is operated in its series resonance mode in a circuit that includes an amplifier and voltage variable phase shifter. As the phase shift is varied, the resonator will shift its frequency to compensate the phase shift. The result is a voltage variable oscillator frequency. The low-Q resonator has a non-linear phase versus frequency characteristic so that frequency is not a linear function of control voltage. A plural emitter transistor is employed in one side of a differential control amplifier. The resulting non-linear transfer characteristic is used to compensate the non-linear oscillator characteristic so that the frequency versus control voltage is linear.

REFERENCES:
patent: 3569867 (1971-03-01), Ernst
patent: 3973221 (1976-08-01), Jett, Jr.

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