JPS6072003A - Control microcomputer - Google Patents

Control microcomputer

Info

Publication number
JPS6072003A
JPS6072003A JP17827983A JP17827983A JPS6072003A JP S6072003 A JPS6072003 A JP S6072003A JP 17827983 A JP17827983 A JP 17827983A JP 17827983 A JP17827983 A JP 17827983A JP S6072003 A JPS6072003 A JP S6072003A
Authority
JP
Japan
Prior art keywords
ground
control microcomputer
analog
amplifier
digital
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
Application number
JP17827983A
Other languages
Japanese (ja)
Inventor
Kazuhiro Shiroo
和博 城尾
Noriaki Yamamoto
山本 則明
Shigekazu Kato
加藤 重和
Atsushi Ito
温司 伊藤
Arata Kida
喜田 新
Shiyouji Kihara
祥二 幾原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Sanki Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Sanki Engineering Co Ltd
Hitachi Techno Engineering Co Ltd
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Sanki Engineering Co Ltd, Hitachi Techno Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Sanki Engineering Co Ltd
Priority to JP17827983A priority Critical patent/JPS6072003A/en
Publication of JPS6072003A publication Critical patent/JPS6072003A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00Systems controlled by a computer
    • G05B15/02Systems controlled by a computer electric

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Safety Devices In Control Systems (AREA)
  • Control By Computers (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、制御用マイクロコンピュータ(以下、制御用
マイコンと略)に係1ハ特にドライプロセスにてウェハ
に所定の処理を施こす半導体製造装置に好適な制御用マ
イコンに関するものである。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a control microcomputer (hereinafter abbreviated as a control microcomputer) and particularly to semiconductor manufacturing equipment that performs predetermined processing on wafers in a dry process. The present invention relates to a control microcomputer suitable for.

〔発明の背景〕[Background of the invention]

デジタルグランドとアナロググランドとを有し、これら
グランドが半導体製造装置の制御対象物とそれぞれ接続
された制御用マイコンでは、従来、テ′ジタル信号系に
おいては、光絶縁されているが。
Conventionally, a control microcomputer has a digital ground and an analog ground, and these grounds are respectively connected to an object to be controlled in a semiconductor manufacturing device. Conventionally, a digital signal system is optically isolated.

しかし、アナログ信号系においては、D/A変換後若し
くはA/D変換前のアナログ信号値を絶縁アンプにより
絶縁している。このため次のような欠点があった。
However, in an analog signal system, the analog signal value after D/A conversion or before A/D conversion is isolated by an isolation amplifier. This resulted in the following drawbacks.

(1)制御対象物の高電圧、高周波による電源ノイズが
デジタルグランドに悪影響を及ぼし、又、アナロググラ
ンドのあるコモンラインでノイズが発生した場合、他の
コモンラインに影響を及ぼしアナログ入出力信号がノイ
ズを含んだ信号となるため、制御対象物を精度良く制御
することが不能になる。
(1) Power supply noise due to high voltage and high frequency of the controlled object has an adverse effect on the digital ground, and if noise occurs on the common line with the analog ground, it will affect other common lines and cause the analog input/output signal to Since the signal contains noise, it becomes impossible to accurately control the object to be controlled.

(2) アナログ入出力信号点数に相当する絶縁アンプ
を設ける必要があるため、制御用マイコンが大型1ヒす
ると共に高価になる。
(2) Since it is necessary to provide isolation amplifiers corresponding to the number of analog input/output signal points, the control microcomputer becomes large and expensive.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、デジタルグランドへのノイズの付加並
びにアナログ入出力信号へのノイズの付加を防止するこ
とで、制御対象物を精度良く制御できる制御用マイコン
を提供することにある。
An object of the present invention is to provide a control microcomputer that can control a controlled object with high precision by preventing noise from being added to a digital ground and from adding noise to an analog input/output signal.

〔発明の概要〕[Summary of the invention]

本発明は、デジタルグランドと制御対象物とを電気的に
絶縁し、アナロググランドのコモンラインを独立させた
ことを特徴とするもので、デジタルグランドへのノイズ
の付加並びにアナログ入出力信号へのノイズの付加を防
止しようとしたものである。
The present invention is characterized in that the digital ground and the controlled object are electrically isolated and the common line of the analog ground is made independent, which prevents noise from being added to the digital ground and noise to the analog input/output signal. This was an attempt to prevent the addition of

〔発明の実施例〕[Embodiments of the invention]

本発明の一実施例を図面により説明する。 An embodiment of the present invention will be described with reference to the drawings.

図面で、制御用マイコンlOは、デジタルグランド圀と
アナロググランド加とを有している。デジタルグランド
加は、中央処理側のグランド、例えば、マイクロプロセ
ッサ周辺回路21を有するグランドであり、又アナログ
グランド(9)は、 D/A変換周辺回路31とアンプ
32 aと絶縁アンプ33aと絶縁トランス34Bとで
なるアナログ信号出力側グランドあと、A/D変換周辺
回路謁とアンプ32bと絶縁アンプ33bと絶縁トラン
ス34bとでなるアナログ信号入力側グランド37とで
構成されている。マイクロプロセッサ周辺回路21のデ
ジタル信号入出力部は光アイソレータ旬を介して制御対
象物印とそれぞれ接続されている。マイクロプロセッサ
周辺回路21のアナログ信号入出力部は光アイソレータ
仙を介してD/A変換周辺回路31 、A/D変換周辺
回路興とそれぞれ接続され、アンプ32a、32b、絶
縁アンプ33 a + a3bは制御対象物圀とそれぞ
れ接続されている。又、アナログ信号出力側グランド篤
の絶縁アンプ33aと絶縁トランス34aとは、D/A
変換周辺回路31.アンプ32 aより独立させられ、
アナログ信号入力端グランド37の絶縁アンプ33bと
絶縁トランス34bとは、A/D変換周辺回路蕊、アン
プ32bより独立させられている。
In the drawing, the control microcomputer IO has a digital ground field and an analog ground field. The digital ground (9) is the ground on the central processing side, for example, the ground that includes the microprocessor peripheral circuit 21, and the analog ground (9) is the ground that includes the D/A conversion peripheral circuit 31, the amplifier 32a, the isolation amplifier 33a, and the isolation transformer. 34B, an analog signal input side ground 37 consisting of an A/D conversion peripheral circuit, an amplifier 32b, an isolation amplifier 33b, and an isolation transformer 34b. The digital signal input/output sections of the microprocessor peripheral circuit 21 are respectively connected to the control object marks via optical isolators. The analog signal input/output section of the microprocessor peripheral circuit 21 is connected to the D/A conversion peripheral circuit 31 and the A/D conversion peripheral circuit through optical isolators, respectively, and the amplifiers 32a, 32b, and isolation amplifiers 33a+a3b are Each is connected to the controlled object area. In addition, the analog signal output side ground-connected isolation amplifier 33a and isolation transformer 34a are connected to the D/A
Conversion peripheral circuit 31. It is made independent from the amplifier 32a,
The isolation amplifier 33b and isolation transformer 34b of the analog signal input end ground 37 are independent from the A/D conversion peripheral circuitry and the amplifier 32b.

本実施例のような制御用マイコンでは次のような効果が
得られる。
The control microcomputer as in this embodiment provides the following effects.

(1)テ゛ジタルグランドと制御対象物とを光アイソレ
ータを介して接続しデジタルグランドと制御対象物とを
電気的に絶縁しているため、制御対象物からのデジタル
グランドへのノイズの付加を防止でき、又、アナログ信
号出力側グランドの絶縁アンプと絶縁トランスとをD/
A変換周辺回路、アンプより独立させ、アナログ信号入
力側グランドの絶縁アンプと絶縁トランスとをA/D変
換周辺回路、アンプより独立させてアナロググランドの
コモンラインを独立させているため、アナログ入出力信
号へのノイズの付加を防止でき、従って、制御対象物を
精度良く制御できる。
(1) Since the digital ground and the controlled object are connected via an optical isolator to electrically isolate the digital ground and the controlled object, it is possible to prevent noise from being added to the digital ground from the controlled object. , Also, connect the analog signal output side ground isolation amplifier and isolation transformer to D/
Analog input/output is made independent from the A conversion peripheral circuit and amplifier, and the isolation amplifier and isolation transformer on the analog signal input side ground are made independent from the A/D conversion peripheral circuit and amplifier, making the analog ground common line independent. Addition of noise to the signal can be prevented, and therefore the object to be controlled can be controlled with high precision.

(2) デジタルグランドとアナロググランドとを光ア
イソレータを介し接続しこれらグランドを電気的に絶縁
しているため、ノイズ対策を要する部分以外には、特に
絶縁アンプを設ける必要がない。従って、絶縁アンプの
個数を減少することができ、制御用マイコンを小型かつ
、安価にできる。
(2) Since the digital ground and the analog ground are connected via an optical isolator and these grounds are electrically isolated, there is no need to provide any isolation amplifiers except in areas where noise countermeasures are required. Therefore, the number of isolation amplifiers can be reduced, and the control microcomputer can be made smaller and cheaper.

〔発明の効果〕〔Effect of the invention〕

本発明は、以上説明したように、デジタルグランドと制
御対象物とを電気的に絶縁し、アナロググランドのコモ
ンラインを独立させたことで、デジタルグランドへのノ
イズの付加並びにアナログ入出力信号へのノイズの伺加
を防止できるので。
As explained above, the present invention electrically isolates the digital ground and the controlled object and makes the analog ground common line independent, thereby preventing noise from being added to the digital ground and analog input/output signals. This prevents the addition of noise.

制御対象物を精度良く制御できる効果がある。This has the effect of allowing the object to be controlled to be controlled with high precision.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は、本発明による制御用マイコンの一実施例を示す
構成図である。
The drawing is a configuration diagram showing one embodiment of a control microcomputer according to the present invention.

Claims (1)

【特許請求の範囲】 1、 デジタルグランドとアナロググランドとを有し、
これらグランドが制御対象物とそれぞれ接続された制御
用マイクロコンピュータにおいて。 前記デジタルグランドと前記制御対象物とを電気的に絶
縁し、前記アナロググランドのコモンラインを独立させ
たことを特徴とする制御用マイクロコンピュータ。 2、前記デジタルグランドと前記アナロググランドとを
光アイソレータを介して接続すると共に。 アナロググランドを構成する絶縁アンプと絶縁トランス
とをアナロググランドを構成するD/A変換周辺回路、
D/A変換周辺回路及びアンプより独立させた特許請求
の範囲第1項記載の制御用マイクロコンピュータ。
[Claims] 1. Having a digital ground and an analog ground,
In the control microcomputer, each of these grounds is connected to the controlled object. A control microcomputer, characterized in that the digital ground and the object to be controlled are electrically insulated, and the common line of the analog ground is made independent. 2. Connecting the digital ground and the analog ground via an optical isolator. An isolation amplifier and an isolation transformer that make up the analog ground, and a D/A conversion peripheral circuit that makes up the analog ground.
A control microcomputer according to claim 1, which is independent from a D/A conversion peripheral circuit and an amplifier.
JP17827983A 1983-09-28 1983-09-28 Control microcomputer Pending JPS6072003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17827983A JPS6072003A (en) 1983-09-28 1983-09-28 Control microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17827983A JPS6072003A (en) 1983-09-28 1983-09-28 Control microcomputer

Publications (1)

Publication Number Publication Date
JPS6072003A true JPS6072003A (en) 1985-04-24

Family

ID=16045687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17827983A Pending JPS6072003A (en) 1983-09-28 1983-09-28 Control microcomputer

Country Status (1)

Country Link
JP (1) JPS6072003A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745666A1 (en) * 1996-02-29 1997-09-05 Sgs Thomson Microelectronics AUTOMATIC GAIN ADJUSTMENT CIRCUIT USING A CAPACITOR TO REDUCE DIGITAL NOISE COUPLING
FR2745665A1 (en) * 1996-02-29 1997-09-05 Sgs Thomson Microelectronics AUTOMATIC GAIN ADJUSTMENT CIRCUIT USING AN AMPLIFIER TO REDUCE DIGITAL NOISE COUPLING

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146681A (en) * 1974-10-18 1976-04-21 Hitachi Ltd PUROSESUNYUSHUTSURYOKUSOCHI
JPS5279849A (en) * 1975-12-26 1977-07-05 Toshiba Corp Process input/output system for essential safety protection
JPS56168203A (en) * 1980-05-30 1981-12-24 Mitsubishi Electric Corp Analog output device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146681A (en) * 1974-10-18 1976-04-21 Hitachi Ltd PUROSESUNYUSHUTSURYOKUSOCHI
JPS5279849A (en) * 1975-12-26 1977-07-05 Toshiba Corp Process input/output system for essential safety protection
JPS56168203A (en) * 1980-05-30 1981-12-24 Mitsubishi Electric Corp Analog output device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745666A1 (en) * 1996-02-29 1997-09-05 Sgs Thomson Microelectronics AUTOMATIC GAIN ADJUSTMENT CIRCUIT USING A CAPACITOR TO REDUCE DIGITAL NOISE COUPLING
FR2745665A1 (en) * 1996-02-29 1997-09-05 Sgs Thomson Microelectronics AUTOMATIC GAIN ADJUSTMENT CIRCUIT USING AN AMPLIFIER TO REDUCE DIGITAL NOISE COUPLING
US6208209B1 (en) 1996-02-29 2001-03-27 Sgs-Thompson Microelectronics Pte. Ltd. Automatic gain control circuit using a capacitor for minimizing digital coupling

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