JPH0443027U - - Google Patents
Info
- Publication number
- JPH0443027U JPH0443027U JP8446890U JP8446890U JPH0443027U JP H0443027 U JPH0443027 U JP H0443027U JP 8446890 U JP8446890 U JP 8446890U JP 8446890 U JP8446890 U JP 8446890U JP H0443027 U JPH0443027 U JP H0443027U
- Authority
- JP
- Japan
- Prior art keywords
- adder
- pwm waveform
- command value
- pwm
- correction
- 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
- 238000005259 measurement Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Analogue/Digital Conversion (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図、第２図は第１図の実施例の動作を説明する
ためのタイミングチヤート、第３図は従来例の構
成を示すブロツク図、第４図は第３図の従来例の
動作を説明するための図である。
１……加算器、２……ＰＷＭ波形生成器、３…
…ローパスフイルタ、４……カウンタ、５……ラ
ツチ、６……差分器。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a timing chart for explaining the operation of the embodiment of FIG. 1, and FIG. 3 is a block diagram showing the configuration of a conventional example. FIG. 4 is a diagram for explaining the operation of the conventional example shown in FIG. 1... Adder, 2... PWM waveform generator, 3...
...Low pass filter, 4...Counter, 5...Latch, 6...Differentiator.
Claims (1)
を加算して補正指令値を出力する加算器１と、 該加算器１からの補正指令値を受けてＰＷＭ波
形を発生させるＰＷＭ波形生成器２と、 該ＰＷＭ波形生成器２から出力されるＰＷＭ波
形を入力とするフイルタ回路３と、 前記ＰＷＭ波形生成器２から出力されるパルス
幅を測定するパルス幅測定回路４と、 前記加算器１から出力される補正指令値と前記
パルス幅測定回路４の測定値とを比較し、その差
分を前記加算器１に前記補正値として帰還させる
差分器６とを有することを特徴とするＰＷＭ方式
のＤ／Ａ変換器。[Scope of Claim for Utility Model Registration] An adder 1 that adds a correction value to an output command value from a PWM controller and outputs a correction command value; and a PWM waveform generated by receiving the correction command value from the adder 1. a PWM waveform generator 2; a filter circuit 3 that receives the PWM waveform output from the PWM waveform generator 2; and a pulse width measurement circuit 4 that measures the pulse width output from the PWM waveform generator 2. It is characterized by comprising a difference device 6 that compares the correction command value outputted from the adder 1 and the measurement value of the pulse width measuring circuit 4 and feeds the difference back to the adder 1 as the correction value. PWM type D/A converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8446890U JPH0443027U (en) | 1990-08-09 | 1990-08-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8446890U JPH0443027U (en) | 1990-08-09 | 1990-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0443027U true JPH0443027U (en) | 1992-04-13 |
Family
ID=31632977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8446890U Pending JPH0443027U (en) | 1990-08-09 | 1990-08-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443027U (en) |
-
1990
- 1990-08-09 JP JP8446890U patent/JPH0443027U/ja active Pending
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