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:
Sep. 20, 2011
Filed:
Sep. 25, 2009
Bruce M. Newman, Gilbert, AZ (US);
Bruce M. Newman, Gilbert, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
Embodiments include DACs and methods for digital-to-analog conversion. A DAC includes an encoder and a plurality of DAC elements. The encoder maps each of a plurality of bits of a digital input value to one of the DAC elements, and produces a sign indication indicating whether a magnitude of the digital input value is above or below a threshold. Each DAC element produces a DAC element analog output signal that indicates whether a received sign indication and a received bit corresponds to a first state, a second state or a third state (e.g., a zero, positive or negative state). In an embodiment, the DAC uses positive historic mapping information when the magnitude of the digital input value is above the threshold, and negative historic mapping information when the magnitude of the digital input value is below the threshold. DAC elements may be configurable into a Return-to-Zero or a Non-Return-to-Zero mode.