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Title:
CALIBRATION TECHNIQUES FOR A PRECISION RELAXATION OSCILLATOR INTEGRATED CIRCUIT WITH TEMPERATURE COMPENSATION
Document Type and Number:
WIPO Patent Application WO2000076069
Kind Code:
A3
Abstract:
Several calibration techniques for a precision relaxation oscillator with temperature compensation produces a stable clock frequency over wide variations of ambient temperature. The calibration techniques provide for different methods of determining CTAT current, PTAT current or the ratio of PTAT current to CTAT current. The calibration techniques provide different methods for determining CTAT and PTAT calibration values and for setting CTAT and PTAT calibration select switches.

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Inventors:
NOLAN JAMES B
ELLISON RYAN SCOTT
Application Number:
PCT/US2000/028180
Publication Date:
July 26, 2001
Filing Date:
April 26, 2000
Export Citation:
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Assignee:
MICROCHIP TECH INC (US)
International Classes:
H03B5/04; H03B5/20; H03K3/011; H03K3/0231; H03L1/02; G05F3/24; (IPC1-7): H03K3/0231; H03K3/03; H03K3/011; H03K3/66
Domestic Patent References:
WO2000036745A12000-06-22
Foreign References:
US5699024A1997-12-16
US5352934A1994-10-04
US5563928A1996-10-08
US6052035A2000-04-18
EP0944169A21999-09-22
US6020790A2000-02-01
US5912593A1999-06-15
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