DIFFERENTIAL-OUTPUT D/A CONVERTER AND A/D CONVERTER

WIPO Patent Application WO/2018/123201

A1

A differential-output D/A converter according to the present disclosure is provided with: decoders (2p, 2n) for converting inputted data into thermometer code; a positive-side capacitor array (3p, 3Ap, 3Bp, 3Cp) comprising a plurality of unit capacitors (Cp) having one end connected to a positive-side output terminal, and a switch (SWp) for switching the other end of the unit capacitors so as to connect to a positive-side reference voltage or a negative-side reference voltage in accordance with the thermometer code; and a negative-side capacitor array (3n, 3An, 3Bn, 3Cn) comprising a plurality of unit capacitors (Cn) having one end connected to a negative-side output terminal, and a switch (SWn) for switching the other end of the unit capacitors so as to connect to the positive-side reference voltage or the negative-side reference voltage in accordance with the thermometer code. The positive-side and negative-side capacitor arrays are disposed in an discretionary first direction. The unit capacitors constituting each of the arrays are arranged in a second direction orthogonal to the first direction. The unit capacitors corresponding to the thermometer code in the positive-side and negative-side capacitor arrays are disposed so as to be point-symmetrical with respect to the center of the arrays as the symmetry point.

FUJIMOTO YU (JP)
NEZUKA TOMOHIRO (JP)
MAKIHARA TETSUYA (JP)
MORINAGA TAKESHI (JP)

PCT/JP2017/036636

July 05, 2018

October 10, 2017

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DENSO CORP (JP)

H03M1/74; H03M1/38; H03M1/68

JPH11163728A	1999-06-18
JP2005136055A	2005-05-26
JPH06152425A	1994-05-31
JPH05268097A	1993-10-15
JPH0969777A	1997-03-11

SATO INTERNATIONAL PATENT FIRM (JP)

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