Oscillators – Solid state active element oscillator – Transistors
Patent
1997-01-31
2000-06-13
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331135, 331143, 331177R, H03B 524
Patent
active
060754206
ABSTRACT:
An oscillation device includes a buffer device, a feedback device for feeding back an output of the buffer device to an input thereof and a charging device and a discharging device connected to the input of the buffer device. The charging device includes a first switching device that is turned on and off based on the output of the buffer device and a first current control device that controls the current flowing into the input of the buffer device through the first switching device. The discharging device includes a second switching device that is turned on or off based on the output of the buffer device and a second current control device that controls the current flowing out of the input of the buffer device through the second switching device. The first and second switching devices include first and second transistors and the first and second current sources that include third and fourth transistors. The oscillation device includes a bias circuit that controls at least the current ratio of the first and second current of the first and second current sources by controlling bias voltages applied to first and second bias terminals of the oscillation device.
REFERENCES:
patent: 3723907 (1973-03-01), Tajchman et al.
patent: 3878482 (1975-04-01), Schowe, Jr.
patent: 4115748 (1978-09-01), Kubo et al.
patent: 4414515 (1983-11-01), Suzuki et al.
patent: 4465983 (1984-08-01), Hogeboom
patent: 4816777 (1989-03-01), Benhamida
patent: 4857866 (1989-08-01), Tateishi
patent: 5689239 (1997-11-01), Turner et al.
Aoki Shigeki
Imamura Yoichi
Koizumi Norio
Grimm Siegfried H.
Seiko Epson Corporation
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