Title:
DIGITAL ANALOG CONVERTER, WIRELESS DEVICE, PLL, AND DIGITAL AUDIO DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/162691
Kind Code:
A1
Abstract:
This digital analog converter comprises multiple rows of ΔΣ modulation circuits and a serializer which switches between outputting output signals of the multiple ΔΣ modulation circuits. The ΔΣ modulation circuits include an integrator that integrates an input signal, a quantizer that quantizes the output of the integrator, a delay unit that delays output of the quantizer, and a subtraction unit that outputs the difference between the output signal of the delay unit and the input signal, and said ΔΣ modulation circuits output the quantizer output as the output signal. The wireless device, the PLL, and the digital audio device each have the aforementioned digital analog converter.
Inventors:
AONO MASAHIRO (JP)
TAKEI KEN (JP)
OOKURA YOSHINORI (JP)
TAKEI KEN (JP)
OOKURA YOSHINORI (JP)
Application Number:
PCT/JP2014/061300
Publication Date:
October 29, 2015
Filing Date:
April 22, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H03M3/02; H03F3/217; H03L7/18; H04L27/00
Domestic Patent References:
| WO2012077249A1 | 2012-06-14 |
Foreign References:
| JP2001024512A | 2001-01-26 | |||
| JP2005519566A | 2005-06-30 | |||
| JPH0722861A | 1995-01-24 |
Attorney, Agent or Firm:
SEIRYO I. P. C. (JP)
青稜 patent business corporation (JP)
青稜 patent business corporation (JP)
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