The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2011
Filed:
Aug. 11, 2009
Sergio Pesenti, Vevey, CH;
Sergio Pesenti, Vevey, CH;
Marvell International Ltd., Hamilton, BM;
Abstract
In one embodiment the present invention includes a circuit for calibrating analog and digital circuits. The circuit includes an analog input stage, a discrete time processing stage, a DAC, and a calibration circuit. The analog input stage includes an input resistance and the DAC includes a capacitance. The input resistance and the capacitance set a time constant for the circuit. A reference signal is applied to the input of the analog input stage, and the calibration circuit generates a control signal to adjust the time constant. As the time constant is changed, a digitized signal at the output of the discrete time processing stage also changes. When the digitized signal crosses a threshold set by a digital reference signal, the time constant is calibrated.