JPH0348934U - - Google Patents
Info
- Publication number
- JPH0348934U JPH0348934U JP10825789U JP10825789U JPH0348934U JP H0348934 U JPH0348934 U JP H0348934U JP 10825789 U JP10825789 U JP 10825789U JP 10825789 U JP10825789 U JP 10825789U JP H0348934 U JPH0348934 U JP H0348934U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- calculated
- error
- reference pulse
- integrating circuit
- 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
- 230000010354 integration Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図は本考案の一実施例に係るＡ／Ｄ変換器
の全体構成を示す概略ブロツク図、第２図Ａは第
１図の変換器における基準パルス数と積分電圧と
の関係を示すグラフ、第２図ＢないしＤは第１図
の変換器の動作を示すタイムチヤートである。
符号の説明、１……電流制御回路、２……比較
器、３……計数制御回路、４……インピーダンス
変換器、５……誤差演算回路、６……比較増幅器
、Ｖｉｎ……入力電圧、ｉ……充電電流、Ｖｉ…
…積分電圧、Ｖｒｅｆ……基準電圧。
FIG. 1 is a schematic block diagram showing the overall configuration of an A/D converter according to an embodiment of the present invention, and FIG. 2A is a graph showing the relationship between the number of reference pulses and the integrated voltage in the converter of FIG. 1. , FIGS. 2B to 2D are time charts showing the operation of the converter of FIG. Explanation of symbols, 1...Current control circuit, 2...Comparator, 3...Counting control circuit, 4...Impedance converter, 5...Error calculation circuit, 6...Comparison amplifier, Vin...Input voltage, i...charging current, Vi...
...integrated voltage, Vref...reference voltage.
Claims (1)
タル変換すべき入力電圧に等しくなるまでに要す
る時間隔を、基準パルス数として算出し、この算
出基準パルス数を前記入力電圧のデジタル値とし
て出力するようになつた単一積分型Ａ／Ｄ変換器
において、 前記積分開始時点からの前記基準パルス数が予
め設定された個数に達した時点における前記積分
回路の積分電圧を検出する積分電圧検出手段と、
検出された前記積分電圧と予め設定された個数の
前記基準パルス数に対応する目標積分電圧との誤
差を演算する誤差演算手段と、演算された誤差を
解消する方向に、前記積分回路の充電電流値を補
正する充電電流制御手段とを有することを特徴と
する単一積分型Ａ／Ｄ変換器。[Claims for Utility Model Registration] The time interval required for the integrated voltage of the integrating circuit to become equal to the input voltage to be digitally converted from the start of integration is calculated as a reference pulse number, and this calculated reference pulse number is used as the input voltage. In a single-integrating A/D converter that now outputs a voltage as a digital value, the integrated voltage of the integrating circuit at the time when the reference pulse number from the integration start point reaches a preset number. an integral voltage detection means for detecting;
error calculating means for calculating an error between the detected integrated voltage and a target integrated voltage corresponding to a preset number of reference pulses; and a charging current of the integrating circuit in a direction to eliminate the calculated error. 1. A single integral type A/D converter, comprising charging current control means for correcting a value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10825789U JPH0348934U (en) | 1989-09-14 | 1989-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10825789U JPH0348934U (en) | 1989-09-14 | 1989-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0348934U true JPH0348934U (en) | 1991-05-13 |
Family
ID=31656907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10825789U Pending JPH0348934U (en) | 1989-09-14 | 1989-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0348934U (en) |
-
1989
- 1989-09-14 JP JP10825789U patent/JPH0348934U/ja active Pending
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