JPS5534536A - Digital-analog converter - Google Patents

Digital-analog converter

Info

Publication number
JPS5534536A
JPS5534536A JP10667578A JP10667578A JPS5534536A JP S5534536 A JPS5534536 A JP S5534536A JP 10667578 A JP10667578 A JP 10667578A JP 10667578 A JP10667578 A JP 10667578A JP S5534536 A JPS5534536 A JP S5534536A
Authority
JP
Japan
Prior art keywords
current
circuit
source
division
ifs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10667578A
Other languages
Japanese (ja)
Inventor
Michinobu Ohata
Toshihiko Matsumura
Toshitaka Tsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10667578A priority Critical patent/JPS5534536A/en
Publication of JPS5534536A publication Critical patent/JPS5534536A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To decrease the width of the supply power source of the D/A converter by connecting the 2-split D/A converters in parallel via the current Miller circuit.
CONSTITUTION: The 1st current division circuit 31, which carries out the segment division, consists of current source 33-n to divide current IFS of constant current source 32 into IFS/2n (n=1∼6), current source 33-7 of IFS/64 and change-over switch S-n provided in accordance with each source 33-n. If the current division ratio of circuit 31 is set to (a), current IS1 of line 34 becomes equal to aIFS. For current Miller circuit 20, current IS which is equal to current IS1 flown to terminal 27 flows to terminal 28. And if division ratio of 2nd current division circuit 35 featuring the same structure as circuit 31 is set to (b), the output current of 2nd D/A converter is obtained as abIFS since the current of line 36 is aIFS. Thus the same function is obtained as that in which two D/A conversion circuit parts are piled on each other, thus decreasing the power source width down to 1/2.
COPYRIGHT: (C)1980,JPO&Japio
JP10667578A 1978-08-31 1978-08-31 Digital-analog converter Pending JPS5534536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10667578A JPS5534536A (en) 1978-08-31 1978-08-31 Digital-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10667578A JPS5534536A (en) 1978-08-31 1978-08-31 Digital-analog converter

Publications (1)

Publication Number Publication Date
JPS5534536A true JPS5534536A (en) 1980-03-11

Family

ID=14439636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10667578A Pending JPS5534536A (en) 1978-08-31 1978-08-31 Digital-analog converter

Country Status (1)

Country Link
JP (1) JPS5534536A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186416A (en) * 1983-04-08 1984-10-23 Hitachi Micro Comput Eng Ltd Converting circuit
JPS59193618A (en) * 1983-04-18 1984-11-02 Hitachi Ltd Digital-analog converting system
US6310568B1 (en) 1999-11-24 2001-10-30 Mitsubishi Denki Kabushiki Kaisha Digital-to-analog conversion circuit
US7173553B2 (en) 2004-09-29 2007-02-06 Matsushita Electric Industrial Co., Ltd. Current summing digital-to-analog converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186416A (en) * 1983-04-08 1984-10-23 Hitachi Micro Comput Eng Ltd Converting circuit
JPH0362056B2 (en) * 1983-04-08 1991-09-24 Hitachi Maikuro Konpyuuta Enjiniaringu Kk
JPS59193618A (en) * 1983-04-18 1984-11-02 Hitachi Ltd Digital-analog converting system
US6310568B1 (en) 1999-11-24 2001-10-30 Mitsubishi Denki Kabushiki Kaisha Digital-to-analog conversion circuit
US7173553B2 (en) 2004-09-29 2007-02-06 Matsushita Electric Industrial Co., Ltd. Current summing digital-to-analog converter

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