Title:
INTERPOLATION DIGITAL-TO-ANALOG CONVERTER (DAC)
Document Type and Number:
WIPO Patent Application WO/2019/119349
Kind Code:
A1
Abstract:
A segmented digital-to-analog converter (DAC) 100 includes an interpolation resistor DAC (RDAC) 108 and a buffer amplifier 110. The interpolation RDAC 108 includes a resistor-two-resistor (R-2R) DAC 192 and a resistor ladder 194. The R-2R DAC 192 receives a first subword 126M and generates an analog output signal 136H-136L with a voltage representative of the first subword 126M. The first subword 126M has an integer number M bits that include a most significant bit (MSB) of a digital input signal 122. The resistor ladder 194 receives the analog output signal 136H-136L and a second subword 126I and generates an analog interpolated signal 146. The second subword 126I has an integer number I bits that include an intermediate significant bit (ISB) of the input signal 122. The buffer amplifier 110 receives the analog interpolated signal 146 and generates an output signal 124 for the segmented DAC 100.
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Inventors:
ZHANG JUN (CN)
Application Number:
PCT/CN2017/117729
Publication Date:
June 27, 2019
Filing Date:
December 21, 2017
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC (US)
TEXAS INSTRUMENTS JAPAN LTD (JP)
TEXAS INSTRUMENTS JAPAN LTD (JP)
International Classes:
H03M1/12
Foreign References:
| US7283082B1 | 2007-10-16 | |||
| US20110102226A1 | 2011-05-05 | |||
| US7675450B1 | 2010-03-09 | |||
| US6621439B1 | 2003-09-16 | |||
| US5714953A | 1998-02-03 |
Other References:
See also references of EP 3729658A4
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
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