Voltage controlled oscillator and method of generating an...

Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation

Reexamination Certificate

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Details

C331S057000, C331S176000, C331S1160FE

Reexamination Certificate

active

06985040

ABSTRACT:
A voltage controlled oscillator (VCO) includes a current source, a current sink and a frequency generator. The current source generates a first current having a first negative temperature coefficient. The current sink generates a second current. A current level of the second current varies in response to a first voltage level of a control voltage, and the second current has a second negative temperature coefficient. The frequency generator generates an oscillating signal having a frequency corresponding to a difference between the first and second currents. The VCO generates the oscillating signal having a stable frequency that is independent of temperature variation.

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patent: 5600281 (1997-02-01), Mori et al.
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patent: 6243784 (2001-06-01), Anderson et al.
patent: 6404295 (2002-06-01), Minami et al.
patent: 6809603 (2004-10-01), Ho
patent: 2004/0012449 (2004-01-01), Illegems
patent: 2001-244743 (2001-09-01), None
patent: 01-73762 (2001-08-01), None

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