Title:
MISMATCH NOISE SHAPING FOR DIGITAL TO ANALOG CONVERTERS
Document Type and Number:
WIPO Patent Application WO/2014/107258
Kind Code:
A9
Abstract:
A system and method dynamically selects digital-to-analog (DAC) circuit elements to provide a true differential-output delta-sigma (ΛΣ) DAC. The sign and magnitude m of a received N-bit input code is determined. If the input code comprises a positive value, m + r circuit elements are selected from a plurality of circuit elements by a positive element selector, in which comprises a number of rotational elements, and r circuit elements are selected by a negative element selector. Each selected circuit element comprises a circuit, element that was not selected for an immediately preceding received input code and has a corresponding minimum usage count value. If the input digital code comprises a negative value, m + r circuit elements are selected by the negative element selector, and. r circuit elements are selected by tile positive element selector. The circuit elements are capable of being configured as positive or negative circuit elements.
Inventors:
WEN JIANPING (US)
KUMAR AMIT (US)
LINK GARRY N (US)
LEE WAI LAING (US)
KUMAR AMIT (US)
LINK GARRY N (US)
LEE WAI LAING (US)
Application Number:
PCT/US2013/073233
Publication Date:
August 28, 2014
Filing Date:
December 05, 2013
Export Citation:
Assignee:
AVNERA CORP (US)
International Classes:
H03M3/00
Attorney, Agent or Firm:
HEYNSSENS, Paul, B. (Suite 9001331 NW Lovejoy Stree, Portland OR, US)
Download PDF: