JPS6412724A - Digital/analog converter - Google Patents
Digital/analog converterInfo
- Publication number
- JPS6412724A JPS6412724A JP17003887A JP17003887A JPS6412724A JP S6412724 A JPS6412724 A JP S6412724A JP 17003887 A JP17003887 A JP 17003887A JP 17003887 A JP17003887 A JP 17003887A JP S6412724 A JPS6412724 A JP S6412724A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- supplying source
- flows
- bias supplying
- current
- 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.)
- Granted
Links
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To perform the test of an operation by only one pin for measurement, by separating the bias supplying source of a resistor connected to the output terminal of a ladder-type D/A converter whose resistance value is R-2R, and detecting the change of a current that flows on the resistor. CONSTITUTION:A second bias supplying source 2 is constituted of an amplifier 7, a transistor Q1, and a constant current source 9, and the amplifier 7 and the transistor Q1 constitute a voltage follower circuit. A first bias supplying source 1 is formed also in the same constitution as that of the second bias supplying source 2. On the resistor R7 with the resistance value 2R connected to the output terminal V00, the current corresponding to an output voltage V0 flows. Therefore, the operating test of the D/A converter 3 is performed by changing input signal patterns (D0, D1, D2, D3) from (0, 0, 0, 0) to (1, 1, 1, 1) in order and measuring the change of the current that flows on the resistor R7 at that time by an ammeter 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17003887A JPS6412724A (en) | 1987-07-07 | 1987-07-07 | Digital/analog converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17003887A JPS6412724A (en) | 1987-07-07 | 1987-07-07 | Digital/analog converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6412724A true JPS6412724A (en) | 1989-01-17 |
JPH056375B2 JPH056375B2 (en) | 1993-01-26 |
Family
ID=15897458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17003887A Granted JPS6412724A (en) | 1987-07-07 | 1987-07-07 | Digital/analog converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412724A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0939493A2 (en) * | 1998-02-26 | 1999-09-01 | Nec Corporation | Digital-to-analog converter accurately testable without complicated circuit configuration and testing method for the same |
KR100335033B1 (en) * | 1997-10-09 | 2002-09-27 | 가부시끼가이샤 도시바 | Semiconductor integrated circuit and semiconductor memory |
-
1987
- 1987-07-07 JP JP17003887A patent/JPS6412724A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100335033B1 (en) * | 1997-10-09 | 2002-09-27 | 가부시끼가이샤 도시바 | Semiconductor integrated circuit and semiconductor memory |
EP0939493A2 (en) * | 1998-02-26 | 1999-09-01 | Nec Corporation | Digital-to-analog converter accurately testable without complicated circuit configuration and testing method for the same |
EP0939493A3 (en) * | 1998-02-26 | 2002-11-13 | Nec Corporation | Digital-to-analog converter accurately testable without complicated circuit configuration and testing method for the same |
Also Published As
Publication number | Publication date |
---|---|
JPH056375B2 (en) | 1993-01-26 |
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