JPS6160539U - - Google Patents
Info
- Publication number
- JPS6160539U JPS6160539U JP14511884U JP14511884U JPS6160539U JP S6160539 U JPS6160539 U JP S6160539U JP 14511884 U JP14511884 U JP 14511884U JP 14511884 U JP14511884 U JP 14511884U JP S6160539 U JPS6160539 U JP S6160539U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- digital
- converter
- switching circuit
- resistance value
- 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
- 238000010586 diagram Methods 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 1
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図は本考案の一実施例を示す回路図で第２
図は第１図中のデジタルスイツチング回路のスイ
ツチング状態に対応するデジタル信号とこのデジ
タルスイツチング回路に接続される抵抗ラダーか
ら比較器へ入力されるアナログ電圧の関係を示す
グラフ、第３図は第１図に示した、本考案のＤ−
Ａ変換器を用いたＡ−Ｄ変換器の被検出アナログ
電圧と制御回路が検出するデジタル信号の関係を
示すグラフ、第４図は本考案を適用した例として
のデジタルエンジンオイル圧力計の表示部を示す
正面図、第５図は従来例を示す回路図で第６図は
第５図中のデジタルスイツチング回路のスイツチ
状態に対応するデジタル信号とこのデジタルスイ
ツチング回路に接続される抵抗ラダーから比較器
へ入力さるアナログ電圧の関係を示すグラフ、第
７図は従来のＤ−Ａ変換器を用いたＡ−Ｄ変換器
では得にくかつた入出力特性を示すグラフである
。
１ａ，２，３，４，６ａ，７，８，９…抵抗、
５…デジタルスイツチング回路、１０…Ｄ−Ａ変
換器、１１…比較器、１２…制御回路、２１〜２
９…表示セグメント。
Figure 1 is a circuit diagram showing one embodiment of the present invention.
The figure is a graph showing the relationship between the digital signal corresponding to the switching state of the digital switching circuit in Figure 1 and the analog voltage input to the comparator from the resistor ladder connected to this digital switching circuit. D- of the present invention shown in FIG.
A graph showing the relationship between the detected analog voltage of the A-D converter using the A converter and the digital signal detected by the control circuit, and Fig. 4 is the display section of a digital engine oil pressure gauge as an example to which the present invention is applied. 5 is a circuit diagram showing a conventional example, and FIG. 6 is a diagram showing a digital signal corresponding to the switch state of the digital switching circuit in FIG. 5 and a resistor ladder connected to this digital switching circuit. FIG. 7 is a graph showing the relationship between analog voltages input to the comparator, and is a graph showing input/output characteristics that are difficult to obtain with an A-D converter using a conventional DA converter. 1a, 2, 3, 4, 6a, 7, 8, 9...resistance,
5...Digital switching circuit, 10...D-A converter, 11...Comparator, 12...Control circuit, 21-2
9...Display segment.
Claims (1)
等を用いたデジタル回路により検出するときに、
上記被検出信号をデジタル信号に変換するＡ−Ｄ
変換器に用いられる、デジタルスイツチング回路
と、このデジタルスイツチング回路の出力端子に
接続される複数の抵抗及びこれら抵抗に接続され
る複数の抵抗により構成される抵抗ラダーとによ
つ構成され上記出力端子の数と等しいビツト数の
デジタル信号を上記抵抗ラダーによつてアナログ
電圧に変換するＤ−Ａ変換器において、ラダー抵
抗の各抵抗値をＲ−２Ｒ構成に設定したものに対
して上記デジタルスイツチング回路の出力端子の
うち最上位ビツトに対応する出力端子に接続され
る抵抗値を小さく及びまたはこの最上位ビツトに
対応する出力端子に接続される抵抗に接続される
抵抗の抵抗値を大きくしたことを特徴とするＤ−
Ａ変換器。 When detecting the detected voltage obtained as an analog voltage using a digital circuit using a microcomputer etc.
A-D converting the above detected signal into a digital signal
The above-mentioned circuit is composed of a digital switching circuit used in a converter, a plurality of resistors connected to the output terminal of this digital switching circuit, and a resistance ladder constituted by a plurality of resistors connected to these resistors. In a D-A converter that converts a digital signal with a number of bits equal to the number of output terminals into an analog voltage using the resistor ladder, the resistance value of each resistor of the ladder resistor is set to an R-2R configuration. Decrease the resistance value connected to the output terminal corresponding to the most significant bit among the output terminals of the switching circuit, and/or increase the resistance value of the resistor connected to the resistor connected to the output terminal corresponding to this most significant bit. D-
A converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14511884U JPS6160539U (en) | 1984-09-26 | 1984-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14511884U JPS6160539U (en) | 1984-09-26 | 1984-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6160539U true JPS6160539U (en) | 1986-04-23 |
Family
ID=30703376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14511884U Pending JPS6160539U (en) | 1984-09-26 | 1984-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6160539U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944183A (en) * | 1982-09-07 | 1984-03-12 | Victor Co Of Japan Ltd | Digital-analog converter |
-
1984
- 1984-09-26 JP JP14511884U patent/JPS6160539U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944183A (en) * | 1982-09-07 | 1984-03-12 | Victor Co Of Japan Ltd | Digital-analog converter |
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