Oscillators – Electromechanical resonator – Crystal
Patent
1999-08-12
2000-12-12
Mis, David
Oscillators
Electromechanical resonator
Crystal
331116FE, 331175, 331176, 331186, H03B 504, H03B 532, H03B 536
Patent
active
061604593
ABSTRACT:
In a temperature-compensated crystal oscillator wherein a temperature-compensated crystal oscillation circuit is driven by a constant voltage generation circuit, the constant voltage generation circuit comprises a differential circuit, a dc load for supplying feedback signals to the differential circuit, a first driver for driving the dc load under control of the differential circuit, a phase-compensation capacitor coupled between a control terminal of the first driver and an output terminal thereof and a second driver for driving the temperature-compensated crystal oscillation circuit. The second driver is the same kind of device as is used for the first driver, and is under control by the same control signal as a control signal for the first driver, sent out by the differential circuit.
REFERENCES:
patent: 4783620 (1988-11-01), Kitagawa et al.
Fukayama Hiroyuki
Sakurai Yasuhiro
Citizen Watch Co. Ltd.
Mis David
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