Title:
ARRANGEMENT METHOD FOR DAC CURRENT SOURCE ARRAY, AND COMMON-SOURCE CURRENT SOURCE ARRAY LAYOUT
Document Type and Number:
WIPO Patent Application WO/2019/114639
Kind Code:
A1
Abstract:
An arrangement method for a DAC current source array, and a common-source current source array layout, for improving the linearity of a DAC and the relevant performance. The arrangement method comprises: determining the number R of rows and the number C of columns of a common-source current source array (201); dividing the common-source current source array into M sub-arrays (202); segmenting an N-bit DAC to obtain 2 X-1 groups of thermometer-type coded current sources and Y groups of binary-type coded current sources (203); distributing the 2 X-1 groups of thermometer-type coded current sources to the M sub-arrays, so that the thermometer-type coded current sources in each sub-array are arranged symmetrically to thermometer-type coded current sources in the other sub-arrays (204); arranging the Y groups of binary-type coded current sources in the M sub-arrays based on the number of binary-type coded current sources in each of the Y groups (205); uniformly arranging bias current sources in the common-source current source array (206); and arranging redundant current sources in the remaining portions in the common-source current source array excluding the binary-type coded current sources, the thermometer-type coded current sources and the bias current sources (207).
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Inventors:
HAN TE (CN)
QIAO JUNSHI (CN)
LAI JIEWEI (CN)
QIAO JUNSHI (CN)
LAI JIEWEI (CN)
Application Number:
PCT/CN2018/120001
Publication Date:
June 20, 2019
Filing Date:
December 10, 2018
Export Citation:
Assignee:
BEIJING SPREADTRUM HIGH TECH COMMUNICATIONS TECH CO LTD (CN)
International Classes:
G06F17/50
Foreign References:
| CN106209107A | 2016-12-07 | |||
| CN103684457A | 2014-03-26 | |||
| CN105356882A | 2016-02-24 | |||
| CN105897274A | 2016-08-24 | |||
| CN101494459A | 2009-07-29 | |||
| US20150042498A1 | 2015-02-12 |
Other References:
See also references of EP 3726402A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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