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:
Aug. 24, 2010
Filed:
Mar. 11, 2009
Applicant:
Chih-shiun LU, Hsinchu, TW;
Inventor:
Chih-Shiun Lu, Hsinchu, TW;
Assignee:
WindTop Technology Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A direct capacitance-to-digital converter is provided, including a plurality of switches, an ADC, a reference voltage circuit and a trigger unit. By using trigger unit to control a plurality of switches, and combining the reference voltages outputted by the reference voltage circuit, the converter can directly sense the external to-be-measured capacitor and related stray capacitor, and directly convert the capacitance of the to-be-measured capacitor into accurate digital signal. The present invention can be integrated with other sensors into a single chip to form an integrated direct capacitance-to-digital converter.