Title:
DIGITAL/ANALOG CONVERTER
Document Type and Number:
WIPO Patent Application WO/2022/074706
Kind Code:
A1
Abstract:
This D/A converter (10) converts a digital signal to an analog signal, the D/A converter comprising a binary-type R-2R-type D/A conversion circuit. The R-2R-type D/A conversion circuit includes a resistance circuit network (20) of R-2R ladder circuits, a plurality of current source transistors (42 to 44), and a variable current source (41). The plurality of current source transistors (42 to 44) are provided for each bit of the high-order bits of the digital signal and cause a current corresponding to the states of the high-order bits to flow to the resistance circuit network (20). The variable current source (41) causes a current corresponding to the state of the low-order bits of the digital signal to flow to the resistance circuit network (20). The variable current source (41) is constituted by a binary-type L-2L-type D/A conversion circuit.
Inventors:
DAITO MUTSUO (JP)
Application Number:
PCT/JP2020/037699
Publication Date:
April 14, 2022
Filing Date:
October 05, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03M1/74; H03M1/68; H03M1/78
Foreign References:
JPS5566126A | 1980-05-19 | |||
JPH10107637A | 1998-04-24 | |||
JP2001237705A | 2001-08-31 | |||
JP2012151728A | 2012-08-09 | |||
JPH1188059A | 1999-03-30 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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