JPS63129708A - Analog input multiplexer circuit - Google Patents
Analog input multiplexer circuitInfo
- Publication number
- JPS63129708A JPS63129708A JP27610086A JP27610086A JPS63129708A JP S63129708 A JPS63129708 A JP S63129708A JP 27610086 A JP27610086 A JP 27610086A JP 27610086 A JP27610086 A JP 27610086A JP S63129708 A JPS63129708 A JP S63129708A
- Authority
- JP
- Japan
- Prior art keywords
- input
- circuit
- multiplexer
- amplifier
- capacitor
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 238000010586 diagram Methods 0.000 description 2
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はＡ／Ｄコンバータのアナログ入力マルチプレク
サ回路、マルチプレクサとフライング・キャパシタと増
幅器とを組合わせて動作するアナログ入力マルチプレク
サ回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an analog input multiplexer circuit for an A/D converter, and an analog input multiplexer circuit that operates by combining a multiplexer, a flying capacitor, and an amplifier.
［従来の技術］
従来のアナログ入力マルチプレクサ回路を第２図に示す
。すなわち、第２図において、アナログ信号の各人力Ｎ
１〜Ｎｎ毎にフライング・キャパシタ回路２を設け、そ
の出力端は１個の入力増幅器３の入力端に接続されてい
る。又、入力増幅器３の出力端はＡ／Ｄコンバータ４の
入力端に接続されている。[Prior Art] A conventional analog input multiplexer circuit is shown in FIG. That is, in FIG. 2, each human power N of the analog signal
A flying capacitor circuit 2 is provided every 1 to Nn, and its output terminal is connected to the input terminal of one input amplifier 3. Further, the output terminal of the input amplifier 3 is connected to the input terminal of the A/D converter 4.
フライング・キャパシタ回路２は、コンデンサ及びトラ
ンスファー接点リレーよりなる。第２図において、例え
ばアナログ信号の入力Ｎ１を選択するときには、その入
力に対応したフライング・キャパシタ回路２を動作させ
、入力Ｎ１にて充電したコンデンサを入力増幅器３の入
力端に接続し、Ａ／Ｄコンバータ４にて電圧を測定する
。The flying capacitor circuit 2 consists of a capacitor and a transfer contact relay. In FIG. 2, for example, when selecting the analog signal input N1, the flying capacitor circuit 2 corresponding to that input is operated, the capacitor charged at the input N1 is connected to the input terminal of the input amplifier 3, and the A/ The voltage is measured by the D converter 4.
［発明が解決しようとする問題点コ
上述した従来のアナログ入力マルチプレクサ回路では、
入力Ｎ１〜Ｎｎの数だけコンデンサ及びトランスファー
接点リレーが必要である。[Problems to be solved by the invention] In the conventional analog input multiplexer circuit described above,
Capacitors and transfer contact relays are required as many as the number of inputs N1 to Nn.
本発明の目的は上記欠点を解決し、トランスファー接点
リレー及びコンデンサによるフライング・キャパシタ回
路を全体で一組しか必要としないアナログ入力マルチプ
レクサ回路を提供するものである。SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned disadvantages and to provide an analog input multiplexer circuit which requires only one total set of flying capacitor circuits with transfer contact relays and capacitors.
［問題点を解決するための手段］
本発明はＡ／Ｄコンバータのアナログ入力マルチプレク
サ回路において、アナログ信号の各入力毎に入力選択回
路を設けてマルチプレクサとし、該マルチプレクサと入
力増幅器の間に１個のフライング・キャパシタ回路を接
続したことを特徴とするアナログ入力マルチプレクサ回
路である。[Means for Solving the Problems] The present invention provides an analog input multiplexer circuit for an A/D converter, in which an input selection circuit is provided for each input of an analog signal to form a multiplexer, and one circuit is provided between the multiplexer and the input amplifier. This is an analog input multiplexer circuit characterized by connecting a flying capacitor circuit.
［実施例］ 以下、本発明の実施例について説明する。[Example] Examples of the present invention will be described below.
本発明は第１図に示すように、アナログ信号の各人力Ｎ
１〜Ｎ、毎に入力選択回路１を配してマルチプレクサと
し、その出力端に１個のフライング・キャパシタ回路２
を接続し、そのフライング・キャパシタ回路２の出力端
は入力増幅器３の入力端に接続したものである。又、入
力増幅器３の出力端はＡ／Ｄコンバータ４の入力端に接
続されている。As shown in FIG.
1 to N, an input selection circuit 1 is arranged to form a multiplexer, and one flying capacitor circuit 2 is connected to the output terminal of the multiplexer.
The output terminal of the flying capacitor circuit 2 is connected to the input terminal of the input amplifier 3. Further, the output terminal of the input amplifier 3 is connected to the input terminal of the A/D converter 4.
実施例において、例えばアナログ信号の入力Ｎ１を選択
するときには、その入力に対応した入力選択回路１のリ
レーを動作させ、入力Ｎ１にてフライング・キャパシタ
回路２のコンデンサを充電し、つづいてフライング・キ
ャパシタ回路２を動作させ、充電したコンデンサを入力
増幅器３の入力端に接続する。このときコンデンサの両
端の電圧は入力Ｎ１に比例している。In the embodiment, for example, when selecting the analog signal input N1, the relay of the input selection circuit 1 corresponding to the input is operated, the capacitor of the flying capacitor circuit 2 is charged with the input N1, and then the flying capacitor is charged. The circuit 2 is operated and the charged capacitor is connected to the input terminal of the input amplifier 3. At this time, the voltage across the capacitor is proportional to the input N1.
入力増幅器３の出力端の電圧をＡ／Ｄコンバータ４にて
測定し、入力Ｎ１のアナログ信号の電圧を知ることがで
きる。The voltage at the output end of the input amplifier 3 is measured by the A/D converter 4, and the voltage of the analog signal at the input N1 can be determined.
［発明の効果］
本発明は以上説明したように各入力毎にメータ接点リレ
ーによる入力選択回路を設けてマルチプレクサとし、該
マルチプレクサと入力増幅器の間に１個のフライング・
キャパシタ回路を接続することにより、トランスファー
接点リレー及びコンデンサを全体で一組しか必要とせず
、トランスファー接点リレー及びコンデンサを大巾に減
少させる効果を有するものである。[Effects of the Invention] As explained above, the present invention provides an input selection circuit using a meter contact relay for each input to form a multiplexer, and connects one flying amplifier between the multiplexer and the input amplifier.
By connecting the capacitor circuit, only one set of transfer contact relays and capacitors is required in total, which has the effect of greatly reducing the number of transfer contact relays and capacitors.
第１図は本発明の一実施例を示すアナログ入力マルチプ
レクサ回路、第２図は従来回路のブロック図でおる。
Ｎ１〜Ｎｎ・・・アナログ入力
１・・・入力選択回路
２・・・フライング・キャパシタ回路
３・・・入力増幅器
４・・・Ａ／ＤコンバータFIG. 1 is a block diagram of an analog input multiplexer circuit showing one embodiment of the present invention, and FIG. 2 is a block diagram of a conventional circuit. N1 to Nn...Analog input 1...Input selection circuit 2...Flying capacitor circuit 3...Input amplifier 4...A/D converter
Claims (1)
回路において、アナログ信号の各入力毎に入力選択回路
を設けてマルチプレクサとし、該マルチプレクサと入力
増幅器の間に１個のフライング・キャパシタ回路を接続
したことを特徴とするアナログ入力マルチプレクサ回路
。(1) In the analog input multiplexer circuit of an A/D converter, an input selection circuit is provided for each analog signal input to form a multiplexer, and one flying capacitor circuit is connected between the multiplexer and the input amplifier. Features an analog input multiplexer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27610086A JPS63129708A (en) | 1986-11-19 | 1986-11-19 | Analog input multiplexer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27610086A JPS63129708A (en) | 1986-11-19 | 1986-11-19 | Analog input multiplexer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63129708A true JPS63129708A (en) | 1988-06-02 |
Family
ID=17564800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27610086A Pending JPS63129708A (en) | 1986-11-19 | 1986-11-19 | Analog input multiplexer circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63129708A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999045402A1 (en) * | 1998-03-06 | 1999-09-10 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| JP2012510070A (en) * | 2008-11-27 | 2012-04-26 | エルジー・ケム・リミテッド | Battery cell voltage measuring apparatus and measuring method |
-
1986
- 1986-11-19 JP JP27610086A patent/JPS63129708A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999045402A1 (en) * | 1998-03-06 | 1999-09-10 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| EP0990913A1 (en) * | 1998-03-06 | 2000-04-05 | Matsushita Electric Industrial Co., Ltd. | Voltage measuring instrument with flying capacitor |
| EP0990913A4 (en) * | 1998-03-06 | 2006-03-15 | Matsushita Electric Ind Co Ltd | Voltage measuring instrument with flying capacitor |
| JP2012510070A (en) * | 2008-11-27 | 2012-04-26 | エルジー・ケム・リミテッド | Battery cell voltage measuring apparatus and measuring method |
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