Low temperature coefficient oscillator

Oscillators – Solid state active element oscillator – Transistors

Reexamination Certificate

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Details

C331S143000, C331S176000, C331S185000

Reexamination Certificate

active

07843279

ABSTRACT:
A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current according to a control signal. The first voltage generator generates a first voltage according to the first current. The second voltage generator generates a second voltage according to the second current and a frequency signal. The amplifier generates the control signal according the first and second voltages. The resistor is coupled between a first terminal of the switch and ground, and a first terminal thereof receives the third current. The switch is conducted or not according the frequency signal. The capacitor is coupled between a second terminal of the switch and ground. The oscillating unit generates the frequency signal according to the fourth current and a voltage of the capacitor.

REFERENCES:
patent: 6020792 (2000-02-01), Nolan et al.
patent: 7034627 (2006-04-01), Kudari
patent: 7548131 (2009-06-01), Noguchi

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