Data processing: measuring – calibrating – or testing – Calibration or correction system – Circuit tuning
Reexamination Certificate
2007-09-21
2009-08-11
Feliciano, Eliseo Ramos (Department: 2857)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Circuit tuning
C702S117000, C702S125000, C327S552000, C327S553000, C327S554000
Reexamination Certificate
active
07574317
ABSTRACT:
An example embodiment provides a method for calibrating an active RC filter and RC time constant calibrator for an active RC filter. The RC time contact calibrator includes a RC timer and a calibration code generator. The RC timer outputs a holding signal based on a comparison of a first output signal and a second output signal. The holding signal output by the RC timer causes a digital count value to be compared to a digital target value. The calibration code generator generates a slope control code and a flag signal based on the comparison of the digital count value and the digital target value and outputs the slope control code as a calibration code based on the flag signal. The slope control code controls the slope of the first output signal and the slope of the second output signal.
REFERENCES:
patent: 3654563 (1972-04-01), Hesler et al.
patent: 4858159 (1989-08-01), Wheelwright et al.
patent: 5914633 (1999-06-01), Comino et al.
patent: 6803813 (2004-10-01), Pham
patent: 6885181 (2005-04-01), Roo
patent: 2001/0045864 (2001-11-01), Kimppa et al.
patent: 2002/0168952 (2002-11-01), Vishakhadatta et al.
patent: 2003/0090316 (2003-05-01), Dathe et al.
patent: 2004/0169565 (2004-09-01), Gaggl et al.
patent: 2004/0260500 (2004-12-01), Punzenberger et al.
patent: 2005/0118980 (2005-06-01), Pai et al.
patent: 2005/0253646 (2005-11-01), Lin
patent: 2006/0001559 (2006-01-01), Tuttle et al.
patent: 2006/0132339 (2006-06-01), Alon et al.
patent: 2007/0025146 (2007-02-01), Huang
patent: 2007/0207760 (2007-09-01), Kavadias et al.
A.M. Durham et al. “Circuit Architectures for High Linearity Monolithic Continuous-Time Filtering” Analog and digital signal processing, vol. 39, No. 9, Sep. 1992, pp. 651-657.
A.M. Durham et al. “Low Distortion VLSI Compatible Self-Tuned Continuous-Time Monolithic Filters.” IEEE, 1991, pp. 1448-1451.
Feliciano Eliseo Ramos
Harness Dickey & Pierce
Henson Mi'schita′
Samsung Electronics Co,. Ltd.
LandOfFree
Method for calibrating a filter, a calibrator and system... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for calibrating a filter, a calibrator and system..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for calibrating a filter, a calibrator and system... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4098344