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:
Jul. 23, 2013
Filed:
Feb. 24, 2011
Shankar Thirunakkarasu, Tucson, AZ (US);
Robert E. Seymour, Tucson, TX (US);
Shankar Thirunakkarasu, Tucson, AZ (US);
Robert E. Seymour, Tucson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method for digitizing at least a portion of a selected analog input signal of a plurality of analog input signals by using a multiplexer having a plurality of channels is provided. Each channel for the multiplexer is associated with at least one of the analog input signals and is associated with a pair of select signals, and wherein each channel includes a cell having an input terminal, an output terminal, and a boosted NMOS switch. According to the method, a first select signal from each pair of select signals is asserted to decouple the input and output terminals for each cell. A boost capacitor is also charged during the non-sampling or conversion phase while the first select signal from each pair of select signals is asserted. A second select signal that is associated with the selected analog input signal is then asserted so as to couple together the input and output terminals for the cell associated with the selected analog input signal and to provide a voltage stored on the boost capacitor to the associated boosted NMOS switch. The portion of the selected analog input signal is then digitized.