Non-linear control circuit

Details Non-linear control circuit Non-linear control circuit

1978-07-31

1980-10-28

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307299A, 330252, H03F 345, H03F 110, H03F 132

Patent

active

042309530

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 non-linear 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: 3428827 (1969-02-01), Berry
patent: 3643107 (1972-02-01), Gilbreath

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