Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1974-11-01
1976-08-17
Jackmon, Edith Simmons
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
330112, G04C 300, H03F 140
Patent
active
039746364
ABSTRACT:
A booster circuit for a liquid crystal display device of a timepiece is disclosed. The booster circuit is a sort of a blocking oscillator having a transformer of which turns ratio is 1 : n (where n is a real number). The rectified output voltage of said blocking oscillator is superposed on the voltage of the cell so that the output voltage of the booster circuit is higher than of the blocking oscillator. A smoothing condenser has ample capacitance to have a larger time constant than the fluctuation time of the voltage of the cell owing to mechanical shock.
REFERENCES:
patent: 3100278 (1963-08-01), Reich
patent: 3225536 (1965-12-01), Reich
patent: 3782103 (1974-01-01), Saito
Adams Bruce L.
Burns Robert E.
Jackmon Edith Simmons
Kabushiki Kaisha Daini Seikosha
Lobato Emmanual J.
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