JPH0224643U - - Google Patents
Info
- Publication number
- JPH0224643U JPH0224643U JP10174188U JP10174188U JPH0224643U JP H0224643 U JPH0224643 U JP H0224643U JP 10174188 U JP10174188 U JP 10174188U JP 10174188 U JP10174188 U JP 10174188U JP H0224643 U JPH0224643 U JP H0224643U
- Authority
- JP
- Japan
- Prior art keywords
- digital signal
- converter
- resistors
- switch
- operational amplifier
- 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
Links
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図は、本考案にかかる加算形Ｄ／Ａ変換装
置の一実施例を示す回路図、第２図は、同加算形
Ｄ／Ａ変換装置の他の実施例を示す回路図、第３
図は、同加算形Ｄ／Ａ変換装置の他の実施例を示
す回路図、第４図は、同加算形Ｄ／Ａ変換装置の
他の実施例を示す回路図、第５図は、同加算形Ｄ
／Ａ変換装置の他の実施例を示す回路図、第６図
は、同実施例の一部詳細回路図、第７図は、同実
施例の動作を示すフローチヤート、第８図は、従
来の加算形Ｄ／Ａ変換装置を示す回路図である。
１０…デイジタル信号発生手段、１３…抵抗、
１４…オペアンプ、１５…フイードバツク抵抗、
１６…補正用抵抗、１７…スイツチ、１９…Ａ／
Ｄ変換器、２０…判断指令手段、２１…表示部、
３０…判断制御手段。
FIG. 1 is a circuit diagram showing one embodiment of the additive D/A converter according to the present invention, FIG. 2 is a circuit diagram showing another embodiment of the additive D/A converter, and FIG.
FIG. 4 is a circuit diagram showing another embodiment of the additive D/A converter, FIG. 5 is a circuit diagram showing another embodiment of the additive D/A converter, and FIG. Additive form D
6 is a partially detailed circuit diagram of the same embodiment, FIG. 7 is a flowchart showing the operation of the same embodiment, and FIG. 8 is a circuit diagram showing another embodiment of the A/A converter. FIG. 2 is a circuit diagram showing an additive type D/A converter of FIG. 10... Digital signal generating means, 13... Resistor,
14... operational amplifier, 15... feedback resistor,
16...Correction resistor, 17...Switch, 19...A/
D converter, 20...judgment command means, 21...display section,
30...Judgment control means.
Claims (1)
発生手段と、そのデイジタル信号を各入力する、
所定比率の値を有する複数個の抵抗と、その抵抗
に接続された、フイードバツク抵抗を有するオペ
アンプとを備えた加算形Ｄ／Ａ変換装置において
、スイツチを有する補正用抵抗が複数個前記フイ
ードバツク抵抗に接続され、前記オペアンプの出
力端がＡ／Ｄ変換器へ接続され、そのＡ／Ｄ変換
器によりデイジタル信号化された信号と前記デイ
ジタル信号発生手段の発生デイジタル信号値とを
比較し、その両デイジタル信号が等しくなる様な
前記補正用抵抗のスイツチの適正オンオフ状態を
指示する判断指令手段と、その判断指令手段の出
力を表示する表示部とが備えられたことを特徴と
する加算形Ｄ／Ａ変換装置。 (2) デイジタル信号を発生するデイジタル信号
発生手段と、そのデイジタル信号を各入力する、
所定比率の値を有する複数個の抵抗と、その抵抗
に接続された、フイードバツク抵抗を有するオペ
アンプとを備えた加算形Ｄ／Ａ変換装置において
、スイツチを有する補正用抵抗が複数個前記フイ
ードバツク抵抗に接続され、前記オペアンプの出
力端がＡ／Ｄ変換器へ接続され、そのＡ／Ｄ変換
器によりデイジタル信号化された信号と前記デイ
ジタル信号発生手段の発生デイジタル信号値とを
比較し、その両デイジタル信号値が等しくなる様
に、前記補正用抵抗のスイツチをオンオフさせる
判断制御手段が備えられていることを特徴とする
加算形Ｄ／Ａ変換装置。 (3) 前記スイツチと前記補正用抵抗は直列に接
続され、その直列接続回路が互いに並列状態で接
続され、その並列状態回路が前記フイードバツク
抵抗に直列又は並列接続されていることを特徴と
する請求項１又は２記載の加算形Ｄ／Ａ変換装置
。 (4) 前記スイツチと前記補正用抵抗は並列に接
続され、その並列接続回路が互いに直列状態で接
続され、その直列状態回路が前記フイードバツク
抵抗に直列又は並列接続されていることを特徴と
する請求項１又は２記載の加算形Ｄ／Ａ変換装置
。[Scope of Claim for Utility Model Registration] (1) A digital signal generating means for generating a digital signal, and each input of the digital signal;
In an additive D/A converter including a plurality of resistors having a value at a predetermined ratio and an operational amplifier having a feedback resistor connected to the resistors, a plurality of correction resistors each having a switch are connected to the feedback resistor. The output terminal of the operational amplifier is connected to an A/D converter, and the signal converted into a digital signal by the A/D converter is compared with the digital signal value generated by the digital signal generating means, and the output terminal of the operational amplifier is connected to an A/D converter. An additive type D/A, characterized in that it is provided with judgment command means for instructing the proper on/off state of the switch of the correction resistor so that the signals become equal, and a display section for displaying the output of the judgment command means. conversion device. (2) a digital signal generating means for generating a digital signal and inputting each of the digital signals;
In an additive D/A converter including a plurality of resistors having a value at a predetermined ratio and an operational amplifier having a feedback resistor connected to the resistors, a plurality of correction resistors each having a switch are connected to the feedback resistor. The output terminal of the operational amplifier is connected to an A/D converter, and the signal converted into a digital signal by the A/D converter is compared with the digital signal value generated by the digital signal generating means, and the output terminal of the operational amplifier is connected to an A/D converter. An additive type D/A converter, characterized in that it is provided with judgment control means for turning on and off the switch of the correction resistor so that the signal values become equal. (3) A claim characterized in that the switch and the correction resistor are connected in series, the series connection circuits thereof are connected in parallel with each other, and the parallel state circuit is connected in series or in parallel with the feedback resistor. Item 2. Additive D/A converter according to item 1 or 2. (4) A claim characterized in that the switch and the correction resistor are connected in parallel, their parallel connection circuits are connected in series with each other, and the series state circuit is connected in series or in parallel with the feedback resistor. Item 2. Additive D/A converter according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10174188U JPH0224643U (en) | 1988-07-29 | 1988-07-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10174188U JPH0224643U (en) | 1988-07-29 | 1988-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0224643U true JPH0224643U (en) | 1990-02-19 |
Family
ID=31331015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10174188U Pending JPH0224643U (en) | 1988-07-29 | 1988-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224643U (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53124053A (en) * | 1977-04-06 | 1978-10-30 | Hitachi Ltd | D/a converter with correction circuit |
| JPS5854727A (en) * | 1981-09-29 | 1983-03-31 | Toshiba Corp | Analog output device |
| JPS5864812A (en) * | 1981-10-15 | 1983-04-18 | Victor Co Of Japan Ltd | Level controller |
| JPS60111511A (en) * | 1983-11-19 | 1985-06-18 | Nec Corp | Agc amplifier |
| JPS60237811A (en) * | 1984-05-09 | 1985-11-26 | 日本電信電話株式会社 | Cable conduit wire passing device |
-
1988
- 1988-07-29 JP JP10174188U patent/JPH0224643U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53124053A (en) * | 1977-04-06 | 1978-10-30 | Hitachi Ltd | D/a converter with correction circuit |
| JPS5854727A (en) * | 1981-09-29 | 1983-03-31 | Toshiba Corp | Analog output device |
| JPS5864812A (en) * | 1981-10-15 | 1983-04-18 | Victor Co Of Japan Ltd | Level controller |
| JPS60111511A (en) * | 1983-11-19 | 1985-06-18 | Nec Corp | Agc amplifier |
| JPS60237811A (en) * | 1984-05-09 | 1985-11-26 | 日本電信電話株式会社 | Cable conduit wire passing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS645523U (en) | ||
| JPH084731Y2 (en) | Frequency characteristic selection circuit | |
| JPS59114619U (en) | Amplifier circuit with variable gain function | |
| JPS63133780U (en) | ||
| JPH0243011U (en) | ||
| JPS61110177U (en) | ||
| JPS63129319U (en) | ||
| JPS61170040U (en) | ||
| JPH02130116U (en) | ||
| JPH0795643A (en) | Button telephone button press information recognition circuit | |
| JPH038319U (en) | ||
| JPH03115416U (en) | ||
| JPH0316740U (en) | ||
| JPH01166485U (en) | ||
| JPH0286228U (en) | ||
| JPS63108229U (en) | ||
| JPS6312934U (en) | ||
| JPS5832598U (en) | Gain switching circuit | |
| JPS6425216U (en) | ||
| JPS63159411U (en) | ||
| JPS60112128U (en) | sensor circuit | |
| JPS6093330U (en) | Signal switching circuit | |
| JPH0221830U (en) | ||
| JPS6280250U (en) | ||
| JPS58166117U (en) | signal output circuit |