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:
Dec. 28, 2004
Filed:
Apr. 22, 2003
Other;
Abstract
A number P of single analog inputs receive an analog signal having a frequency F from a sensor electrode. A single digital output sequentially generates a number P of first digital signals coding the amplitude values of the analog signal. A first multiplexer with a number M of multiple analog inputs with a number N of single analog inputs receives the analog signal and outputs the analog signal on a multiple analog output with a number N of second single analog outputs. A phase sensitive amplifier with a number N of single analog inputs and a number N of single analog outputs is connected to the second single analog outputs of the fist multiplexer. A second multiplexer with a number N of single analog inputs and a single analog output is connected to the single analog outputs of the phase sensitive amplifier. An analog to digital converter with a single analog input tied to the single analog output of the second multiplexer and a single digital output tied to the single digital output sequentially generates the number P of first digital signals coding the amplitude values of the analog signal.