Oscillators – Solid state active element oscillator – Transistors
Patent
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.
Kominski John
National Semiconductor Corporation
Woodward Gail W.
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