Oscillators – Solid state active element oscillator – Transistors
Patent
1977-11-22
1980-08-19
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
368159, 331186, H03B 504, H03B 506, H03B 536
Patent
active
042186617
ABSTRACT:
An oscillator circuit wherein the impedance at the output terminal can be selectively decreased for a short period of time to thereby increase the closed loop gain is provided. The oscillator circuit includes a quartz crystal vibrator and a C-MOS inverter having a drain output terminal for producing a high frequency signal thereat, the gate output terminal being fed back through the quartz crystal vibrator to a gate input terminal to define a predetermined closed loop gain. The invention is particularly characterized by a control circuit external to the oscillator circuit that is adapted to produce a control signal for a predetermined period of time. A secondary inverter is provided and is adapted to be selectively coupled, in parallel, with the C-MOS inverter during the period of time that the control signal is applied thereto, to thereby reduce the impedance at the output terminal of the C-MOS inverter and increase the closed loop gain during the predetermined period of time that the control signal is applied thereto.
REFERENCES:
patent: 4039973 (1977-08-01), Yamashiro
Grimm Siegfried H.
Kabushiki Kaisha Suwa Seikosha
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