Oscillators – Solid state active element oscillator – Transistors
Patent
1998-04-08
2000-12-26
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331116FE, 331158, 331183, 331186, H03B 536, H03L 500
Patent
active
061666092
ABSTRACT:
A crystal oscillation circuit that is capable of operating stably with a low power consumption includes a signal inversion amplifier and a power control circuit that controls the power voltage of this signal inversion amplifier in accordance with an oscillation output. The power control circuit includes a power voltage generation circuit that outputs a plurality of power voltages of different values; a determination control portion that determines the optimal value of the power voltage to be applied to the signal inversion amplifier, based on the oscillation output; and a multiplexer that controls the switching of the power voltage applied to the signal inversion amplifier from the power voltage generation circuit, based on the result of that determination.
REFERENCES:
patent: 3213390 (1965-10-01), Faith et al.
patent: 5719534 (1998-02-01), Imura
Kadowaki Tadao
Makiuchi Yoshiki
Nakamiya Shinji
Grimm Siegfried H.
Seiko Epson Corporation
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