JPH10137210A - Electrocardiograph and crosstalk preventing device for the same - Google Patents

Electrocardiograph and crosstalk preventing device for the same

Info

Publication number
JPH10137210A
JPH10137210A JP8294901A JP29490196A JPH10137210A JP H10137210 A JPH10137210 A JP H10137210A JP 8294901 A JP8294901 A JP 8294901A JP 29490196 A JP29490196 A JP 29490196A JP H10137210 A JPH10137210 A JP H10137210A
Authority
JP
Japan
Prior art keywords
circuit
electrocardiograph
subject input
power supply
subject
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.)
Granted
Application number
JP8294901A
Other languages
Japanese (ja)
Other versions
JP2845845B2 (en
Inventor
Kozo Ishikawa
浩三 石川
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.)
TOCHIGI NIPPON DENKI KK
Original Assignee
TOCHIGI NIPPON DENKI KK
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 TOCHIGI NIPPON DENKI KK filed Critical TOCHIGI NIPPON DENKI KK
Priority to JP8294901A priority Critical patent/JP2845845B2/en
Publication of JPH10137210A publication Critical patent/JPH10137210A/en
Application granted granted Critical
Publication of JP2845845B2 publication Critical patent/JP2845845B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent crosstalk between subject input circuits. SOLUTION: This device has respective independent substrates 2 and 3 for patients A/B inside an amplifier circuit 1 for subject inputs and further, an isolation gap 5 for separating A side circuit area and B side circuit area is provided on a printed circuit board for amplifier package. Therefore, even when disturbance is caused from a non-selected side circuit during the operation of a selected side circuit, the selected side circuit can be prevented by this isolation part from being affected in its operation. Besides, at a power source part inside the reagent input circuit, power supply voltages to be used for the subject input circuit itself are respectively independently prepared for A side and B side while using 12V supplied from the outside. Thus, since the voltages are respectively independently provided for two independent input sides and these two circuits can be isolated, crosstalk between subject input circuits can be effectively removed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術的分野】本発明は心電計および心電
計のクロストーク防止装置に係り、特に被検者入力を2
入力持つ心電計および心電計のクロストーク防止装置に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrocardiograph and a device for preventing crosstalk of the electrocardiograph, and more particularly, to an electrocardiograph which receives an input from a subject.
The present invention relates to an electrocardiograph having an input and a crosstalk prevention device for the electrocardiograph.

【0002】[0002]

【従来の技術】従来、被検者入力回路に2入力A,Bを
有する心電計がある。この心電計は、増幅回路のA/B
側の回路間のアイソレーションがされていないものであ
る。この心電計は、選択側に心電波形を入力し、非選択
側の入力コネクタを抜き差ししたりすると、ノイズ等の
外乱によって選択側の心電波形に影響を与えることにな
る。
2. Description of the Related Art Conventionally, there is an electrocardiograph having two inputs A and B in a subject input circuit. This electrocardiograph uses the A / B of the amplifier circuit.
No isolation between the circuits on the side. In this electrocardiograph, when an electrocardiographic waveform is input to the selected side and an input connector on the non-selected side is connected and disconnected, disturbance such as noise affects the electrocardiographic waveform on the selected side.

【0003】このような従来の心電計は、被験者入力回
路を2入力持つ心電計のうち、回路を2入力間で共有す
る心電計であり、回路内に被検者入力切替え回路(スイ
ッチ)を持ち、心電波形そのものの切替えを行ってい
る。
[0003] Such a conventional electrocardiograph is an electrocardiograph that shares a circuit between two inputs among electrocardiographs having two inputs of a subject input circuit, and includes a subject input switching circuit ( Switch) to switch the ECG waveform itself.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、これま
での心電計では、切替スイッチとして、半導体のスイッ
チによる切替えのため、仮に非選択側の信号を遮断して
いても、それが大きなレベルの信号やノイズであれば、
完全に遮断されず、選択側の信号ラインヘのクロストー
クを発生させることになるという問題がある。
However, in the conventional electrocardiographs, since the changeover switch is switched by a semiconductor switch, even if the signal on the non-selection side is cut off, the signal is at a large level. Or noise
There is a problem that the signal is not completely cut off and crosstalk to the selected signal line occurs.

【0005】すなわち、これまでの心電計では、被検者
入力A,Bがあっても、それぞれの回路間のアイソレー
ションをしなかったため、A側で測定し、B側で未使用
とする場合に、オープン状態のB側に大きなノイズが混
入したりすると、測定中のA側にもノイズの影響が現れ
てしまうという問題がある。
That is, in the conventional electrocardiograph, even if there is the subject's input A and B, the isolation between the respective circuits is not performed, so that the measurement is performed on the A side and the B side is unused. In this case, if a large noise is mixed into the open side B, there is a problem that the influence of the noise appears on the side A during the measurement.

【0006】本発明の目的は、被検者入力回路間におけ
るクロストークを防止する心電計および心電計のクロス
トーク防止装置を提供することにある。
It is an object of the present invention to provide an electrocardiograph and an electrocardiograph crosstalk preventing apparatus for preventing crosstalk between subject input circuits.

【0007】[0007]

【課題を解決するための手段】人体から患者入力部へ入
力される心電波形の振幅レベルは、通常数mVであるた
め、被検者入力(アンプ)回路は数百倍の増幅部を備え
ている。心電計では、ノイズ等の外乱に対しても、同様
の割合で増幅することになる。そこでこれら外乱の要因
の一つであるクロストークノイズを本発明の被検者入力
回路は、以下に述べる2つの手段によって解決する。
Since the amplitude level of the electrocardiogram waveform input from the human body to the patient input section is usually several mV, the subject input (amplifier) circuit has an amplification section several hundred times. ing. The electrocardiograph amplifies disturbances such as noise at a similar rate. Therefore, the subject input circuit of the present invention solves crosstalk noise, which is one of the causes of these disturbances, by the following two means.

【0008】本発明の心電計および心電計のクロストー
ク防止装置は、被検者入力(アンプ)回路内に患者A/
B用にそれぞれ単独の、各回路部を持たせ更にアンプパ
ッケージ用プリント基板上に、A側回路領域とB側回路
領域を分離するためのアイソレーション(絶縁)部をほ
ぼ4mm程度設けている。このため、選択側回路が動作
中に非選択側回路から外乱が発生しても、このアイソレ
ーション部によって、選択側回路動作へ影響を及ぼさな
いようにすることができる。
An electrocardiograph and an electrocardiograph crosstalk prevention apparatus according to the present invention provide a patient A / A circuit in a subject input (amplifier) circuit.
Each of the circuit portions for B is provided independently, and an isolation (insulation) portion for separating the A-side circuit region and the B-side circuit region is provided on the printed circuit board for the amplifier package at about 4 mm. For this reason, even if disturbance occurs from the non-selection side circuit while the selection side circuit is operating, the isolation unit can prevent the operation of the selection side circuit from being affected.

【0009】被検者入力回路内の電源部では、外部から
供給される12Vを使って被検者入力回路自身が使用す
る電源電圧をA側とB側用としてそれぞれ単独に作って
いる。
In the power supply section in the subject input circuit, the power supply voltage used by the subject input circuit itself is independently generated for the A side and the B side using 12 V supplied from the outside.

【0010】以上に説明する本発明では、被検者A/B
切替え信号のレベル(ハイレベルまたはローレベル)に
よって、トランジスタのオン・オフから外部12V電源
の供給の有無を決定している。これによって、被検者入
力が、選択された方の回路にのみ12V電源が供給さ
れ、電源電圧を作るという構成をとっている。
In the present invention described above, the subject A / B
The level of the switching signal (high level or low level) determines whether or not to supply an external 12V power supply from turning on / off the transistor. As a result, a configuration is adopted in which a 12V power supply is supplied only to the selected circuit and the power supply voltage is generated.

【0011】つまり、選択例の回路のみが動作状態とな
り、非選択例の回路には、電源電圧が供給されない非動
作状態となって、選択側の動作に影響を与えにくくして
いる。
That is, only the circuit of the selected example is in the operating state, and the circuit of the non-selected example is in the non-operating state in which the power supply voltage is not supplied, so that the operation on the selected side is hardly affected.

【0012】このため、本発明の心電計および心電計の
クロストーク防止装置においては、2つの被検者切替え
信号のレベルによって、トランジスタのオン・オフから
外部電源の供給の有無を決定することにより、被検者入
力が選択された方の回路にのみ電源電圧が供給され、電
源電圧を作ることができる。
For this reason, in the electrocardiograph and the electrocardiograph crosstalk prevention apparatus according to the present invention, whether or not external power is supplied is determined from the on / off state of the transistor based on the levels of the two subject switching signals. Thus, the power supply voltage is supplied only to the circuit for which the subject input is selected, and the power supply voltage can be generated.

【0013】また本発明においては、選択例の回路のみ
が動作状態となり、非選択側の回路には電源電圧が供給
されない非動作状態となり、選択側の回路の動作に影響
を与えにくくすることができる。したがって、本発明で
は、2つの独立した入力側にそれぞれ単独に持たせ、そ
れら2つの回路間をアイソレーションすることができる
ので、被検者入力回路間におけるクロストークを効果的
に防止することができる。
Further, in the present invention, only the circuit of the selected example is in the operating state, and the power supply voltage is not supplied to the non-selected side circuit, so that the operation of the selected side circuit is hardly affected. it can. Therefore, according to the present invention, since two independent input sides can be provided independently and the two circuits can be isolated from each other, crosstalk between the subject input circuits can be effectively prevented. it can.

【0014】[0014]

【発明の実施の形態】次に、本発明の心電計および心電
計のクロストーク防止装置の実施例について図面を参照
して説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an electrocardiograph and an electrocardiograph crosstalk preventing apparatus according to the present invention will be described with reference to the drawings.

【0015】図1は本発明の実施例の心電計の一部構成
を説明する図、図2は本発明の実施例の非検者入力アン
プ用のプリント基板の一例を示す図、図3は本発明の実
施例の心電計の一部回路構成を示す回路図である。
FIG. 1 is a view for explaining a partial configuration of an electrocardiograph according to an embodiment of the present invention. FIG. 2 is a view showing an example of a printed circuit board for a non-examiner input amplifier according to an embodiment of the present invention. 1 is a circuit diagram showing a partial circuit configuration of an electrocardiograph according to an embodiment of the present invention.

【0016】これらの図において、非検者入力(アン
プ)用プリント基板1上に、A側基板2とB側基板3の
それぞれに配置された入力部・増幅部・A/D変換部・
送受信部・電源部の間にアイソレーション用のギャップ
5を設けた。
In these figures, an input section, an amplification section, an A / D conversion section, and an input section which are respectively arranged on an A-side board 2 and a B-side board 3 on a non-examiner input (amplifier) printed board 1.
An isolation gap 5 is provided between the transmission / reception unit and the power supply unit.

【0017】被検者入力(アンプ)回路内に患者A/B
用にそれぞれ単独の、各回路部を持たせ、更にアンプパ
ッケージ用プリント基板1上に、A側基板2の回路領域
とB側基板3の回路領域を分離するためのアイソレーシ
ョンギャップ5に絶縁部を設けたものである。このアイ
ソレーションギャップ5には、絶縁材料などからなる絶
縁層を基板上に積層してほぼ4mm程度設けて形成す
る。
The patient A / B is provided in the subject input (amplifier) circuit.
In addition, each of the circuit sections is provided independently, and an insulating section is provided on an isolation gap 5 for separating a circuit area of the A-side board 2 and a circuit area of the B-side board 3 on the printed circuit board 1 for an amplifier package. Is provided. The isolation gap 5 is formed by laminating an insulating layer made of an insulating material or the like on a substrate to a thickness of about 4 mm.

【0018】本実施例では、例えばA側基板2を選択側
回路とし、B側基板3を非選択側回路として、動作中に
非選択側回路から外乱が発生してもこのアイソレーショ
ンギャップ5によって、選択側回路動作へ影響を及ぼさ
ないようにすることができる。
In this embodiment, for example, the A-side substrate 2 is used as a selection-side circuit, and the B-side substrate 3 is used as a non-selection-side circuit. , Can be prevented from affecting the operation of the selected circuit.

【0019】また被検者入力回路内電源は、外部から供
給される12V電源を使って被検者入力回路自身が使用
する電源電圧をA側電源回路10とB側電源回路11に
おいて、それぞれ単独で作ることができる。
The power supply in the subject input circuit uses a 12V power supply supplied from the outside to separate the power supply voltage used by the subject input circuit itself in the A-side power supply circuit 10 and the B-side power supply circuit 11, respectively. Can be made with

【0020】このため、本実施例の心電計は、被検者A
/B切替え信号のレベル(ハイレベルまたはローレベ
ル)によって、トランジスタTrA,TrBのオン・オ
フから外部12V電源の供給の有無を決定している。こ
れによって被検者入力が、選択された方の回路にのみ1
2Vが供給され、電源回路を経て電源電圧を作ることが
できる。
For this reason, the electrocardiograph of the present embodiment
Based on the level (high level or low level) of the / B switching signal, whether or not the external 12V power is supplied is determined from the on / off of the transistors TrA and TrB. As a result, the subject input becomes 1 only in the selected circuit.
2V is supplied, and a power supply voltage can be generated via a power supply circuit.

【0021】また以上のように構成したことにより、選
択例の回路のみが動作状態となり、非選択側の回路には
電源電圧が供給されない非動作状態となり、選択側の回
路の動作に影響を与えにくくすることができる。
Further, with the above-described configuration, only the circuit of the selected example is in the operating state, the power supply voltage is not supplied to the non-selected side circuit, and the operation of the selected side circuit is affected. Can be difficult.

【0022】したがって、本実施例の心電計では、患者
入力部、差動増幅部、インストラクション部、増幅部、
A/D変換部、送受信部、電源部から構成される回路を
A/B両側にそれぞれ単独に持たせ、それらA/Bの回
路間をアイソレーションギャップ5により遮断すること
ができるので、被検者入力回路間におけるクロストーク
を防止することができる。
Therefore, in the electrocardiograph of the present embodiment, the patient input unit, the differential amplifier, the instruction unit, the amplifier,
A circuit composed of an A / D conversion unit, a transmission / reception unit, and a power supply unit can be individually provided on both sides of the A / B, and the A / B circuit can be cut off by the isolation gap 5. Crosstalk between user input circuits can be prevented.

【0023】[0023]

【発明の効果】以上に説明したように本発明の心電計お
よび心電計のクロストーク防止装置においては、2つの
被検者切替え信号のレベルによって、トランジスタのオ
ン・オフから外部電源の供給の有無を決定することによ
り、被検者入力が選択された方の回路にのみ電源電圧が
供給され、電源電圧を作ることができる。
As described above, in the electrocardiograph and the electrocardiograph crosstalk prevention apparatus according to the present invention, the supply of external power from the on / off of the transistor is performed depending on the levels of the two subject switching signals. Is determined, the power supply voltage is supplied only to the circuit for which the subject input is selected, and the power supply voltage can be generated.

【0024】また本発明においては、選択例の回路のみ
が動作状態となり、非選択側の回路には電源電圧が供給
されない非動作状態となり、選択側の回路の動作に影響
を与えにくくすることができる。
Further, in the present invention, only the circuit of the selected example is in the operating state, and the power supply voltage is not supplied to the non-selected side circuit, so that the operation of the selected side circuit is hardly affected. it can.

【0025】したがって、本発明では、2つの独立した
入力側にそれぞれ単独に持たせ、それら2つの回路間を
アイソレーションすることができるので、被検者入力回
路間におけるクロストークを効果的に防止することがで
きる。
Therefore, according to the present invention, since two independent input sides can be provided independently and the two circuits can be isolated from each other, crosstalk between the subject input circuits can be effectively prevented. can do.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例の心電計の一部構成を説明する
図である。
FIG. 1 is a diagram illustrating a partial configuration of an electrocardiograph according to an embodiment of the present invention.

【図2】本発明の実施例の非検者入力アンプ用のプリン
ト基板の一例を示す図である。
FIG. 2 is a diagram illustrating an example of a printed circuit board for a non-examiner input amplifier according to an embodiment of the present invention.

【図3】本発明の実施例の心電計の一部回路構成を示す
回路図である。
FIG. 3 is a circuit diagram showing a partial circuit configuration of the electrocardiograph according to the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 増幅回路 2 A側基板 3 B側基板 5 アイソレーションギャップ 10 A側電源回路 11 B側電源回路 DESCRIPTION OF SYMBOLS 1 Amplification circuit 2 A side board 3 B side board 5 Isolation gap 10 A side power supply circuit 11 B side power supply circuit

【手続補正書】[Procedure amendment]

【提出日】平成9年1月24日[Submission date] January 24, 1997

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】図2[Correction target item name] Figure 2

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図2】本発明の実施例の被検者入力アンプ用プリント
基板上に形成された微細なパターンを示す写真である。 ─────────────────────────────────────────────────────
FIG. 2 is a photograph showing a fine pattern formed on a printed circuit board for a subject input amplifier according to an embodiment of the present invention. ────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成9年1月24日[Submission date] January 24, 1997

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0015[Correction target item name] 0015

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0015】図1は本発明の実施例の心電計の一部構成
を説明する図、図2は本発明の実施例の被検者入力アン
プ用のプリント基板の一例を示す図、図3は本発明の実
施例の心電計の一部回路構成を示す回路図である。
FIG. 1 is a diagram illustrating a partial configuration of an electrocardiograph according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a printed circuit board for an input amplifier of a subject according to the embodiment of the present invention. 1 is a circuit diagram showing a partial circuit configuration of an electrocardiograph according to an embodiment of the present invention.

【手続補正2】[Procedure amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0016[Correction target item name] 0016

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0016】これらの図において、被検者入力(アン
プ)用プリント基板1上に、A側基板2とB側基板3の
それぞれに配置された入力部・増幅部・A/D変換部・
送受信部・電源部の間にアイソレーション用のギャップ
5を設けた。
In these figures, an input section, an amplification section, an A / D conversion section, and an input section, which are arranged on an A-side board 2 and a B-side board 3, respectively, on a printed circuit board 1 for subject input (amplifier).
An isolation gap 5 is provided between the transmission / reception unit and the power supply unit.

Claims (8)

【特許請求の範囲】[Claims] 【請求項1】被検者入力信号を増幅する増幅回路を有す
る心電計において、 前記増幅回路内に設けた第1および第2の被検者入力回
路と、 この第1および第2の被検者入力回路のそれぞれの領域
を分離する領域を形成する絶縁回路と、を備えたことを
特徴とする心電計。
1. An electrocardiograph having an amplifier circuit for amplifying a subject input signal, comprising: a first and a second subject input circuit provided in the amplifier circuit; and a first and a second subject input circuit. An electrocardiograph comprising: an insulating circuit that forms an area that separates each area of the examiner input circuit.
【請求項2】前記増幅回路は、被検者入力信号を増幅す
る増幅回路からなり、前記第1および第2の被検者入力
回路は、回路実装基板からなり、FETトランジスタ、
トランジスタ、抵抗およびインバータがその回路実装基
板に実装されており、前記絶縁回路はアイソレータであ
ることを特徴とする請求項1に記載の心電計。
2. The amplifying circuit comprises an amplifying circuit for amplifying a subject input signal, wherein the first and second subject input circuits comprise a circuit board, and include an FET transistor;
The electrocardiograph according to claim 1, wherein the transistor, the resistor, and the inverter are mounted on the circuit board, and the insulating circuit is an isolator.
【請求項3】前記被検者入力回路に供給する電源は、外
部電源から供給される電源電圧を用いて前記被検者入力
回路において使用する電源電圧を2つの領域に分けてそ
れぞれ個別に使用することを特徴とする請求項1または
2に記載の心電計。
3. A power supply to be supplied to the subject input circuit is divided into two regions by using a power supply voltage supplied from an external power supply and used separately. The electrocardiograph according to claim 1, wherein the electrocardiograph is performed.
【請求項4】前記被検者入力回路のそれぞれ2つの切替
え信号のレベルによって、トランジスタのオン・オフか
ら外部電源の供給の有無を決定し、被検者入力が、選択
された方の回路にのみ電源電圧を供給することをを特徴
とする請求項1〜3のいずれかに記載の心電計。
And determining whether or not an external power supply is to be performed based on the on / off state of the transistor based on the levels of the two switching signals of the subject input circuit. The electrocardiograph according to any one of claims 1 to 3, wherein only the power supply voltage is supplied.
【請求項5】被検者入力信号を増幅する増幅回路を有す
る心電計のクロストーク防止装置において、 前記増幅回路内に設けた第1および第2の被検者入力回
路と、 この第1および第2の被検者入力回路のそれぞれの領域
を分離する領域を形成して前記第1および第2の被検者
入力回路に発生する外乱による影響を遮断する絶縁回路
と、を備えたことを特徴とする心電計のクロストーク防
止装置。
5. A crosstalk preventing apparatus for an electrocardiograph having an amplifier circuit for amplifying a subject input signal, comprising: a first and a second subject input circuit provided in the amplifier circuit; And an insulating circuit for forming a region separating the respective regions of the second subject input circuit to cut off the influence of disturbance generated in the first and second subject input circuits. An electrocardiograph crosstalk prevention device.
【請求項6】前記増幅回路は、被検者入力信号を増幅す
る増幅回路からなり、前記第1および第2の被検者入力
回路は、回路実装基板からなり、FETトランジスタ、
トランジスタ、抵抗およびインバータがその回路実装基
板に実装されており、前記絶縁回路はアイソレータであ
ることを特徴とする請求項5に記載の心電計のクロスト
ーク防止装置。
6. The amplifying circuit comprises an amplifying circuit for amplifying a subject input signal, wherein the first and second subject input circuits comprise a circuit board, and include an FET transistor;
6. The electrocardiograph crosstalk prevention device according to claim 5, wherein the transistor, the resistor, and the inverter are mounted on the circuit mounting board, and the insulating circuit is an isolator.
【請求項7】前記被検者入力回路手段に供給する電源
は、外部電源から供給される電源電圧を用いて前記被検
者入力回路において使用する電源電圧を2つの領域に分
けてそれぞれ個別に使用することを特徴とする請求項5
または6に記載の心電計のクロストーク防止装置。
7. A power supply to be supplied to the subject input circuit means, wherein a power supply voltage used in the subject input circuit is divided into two regions by using a power supply voltage supplied from an external power supply, and each of the power supply voltages is individually supplied. 6. The method according to claim 5, wherein:
Or a crosstalk prevention device for an electrocardiograph according to 6.
【請求項8】前記被検者入力回路のそれぞれ2つの切替
え信号のレベルによって、トランジスタのオン・オフか
ら外部電源の供給の有無を決定し、被検者入力が、選択
された方の回路にのみ電源電圧を供給することをを特徴
とする請求項5〜7のいずれかに記載の心電計クロスト
ーク防止装置。
8. The presence or absence of supply of external power from the on / off state of the transistor is determined by the level of each of the two switching signals of the subject input circuit, and the subject input is transmitted to the selected circuit. The electrocardiograph crosstalk prevention device according to any one of claims 5 to 7, wherein only the power supply voltage is supplied.
JP8294901A 1996-11-07 1996-11-07 Electrocardiograph and ECG crosstalk prevention device Expired - Lifetime JP2845845B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8294901A JP2845845B2 (en) 1996-11-07 1996-11-07 Electrocardiograph and ECG crosstalk prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8294901A JP2845845B2 (en) 1996-11-07 1996-11-07 Electrocardiograph and ECG crosstalk prevention device

Publications (2)

Publication Number Publication Date
JPH10137210A true JPH10137210A (en) 1998-05-26
JP2845845B2 JP2845845B2 (en) 1999-01-13

Family

ID=17813726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8294901A Expired - Lifetime JP2845845B2 (en) 1996-11-07 1996-11-07 Electrocardiograph and ECG crosstalk prevention device

Country Status (1)

Country Link
JP (1) JP2845845B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7477933B2 (en) 2002-10-31 2009-01-13 Sanyo Electric Co., Ltd. Portable electrocardiograph, electrocardiogram monitoring system, and electrocardiogram monitoring method using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7477933B2 (en) 2002-10-31 2009-01-13 Sanyo Electric Co., Ltd. Portable electrocardiograph, electrocardiogram monitoring system, and electrocardiogram monitoring method using the same

Also Published As

Publication number Publication date
JP2845845B2 (en) 1999-01-13

Similar Documents

Publication Publication Date Title
JPH10137210A (en) Electrocardiograph and crosstalk preventing device for the same
KR900017416A (en) Signal processor
JPH01309512A (en) Single level multiplexer
KR930005364A (en) Multiplexer circuit
JPH06120424A (en) Semiconductor integrated circuit device
JPS62195798A (en) Sample holding circuit
Gao et al. B61 EMBOLIZATION OF GASTRIC CORONARY VEIN (EGCV): A PROCEDURE FOR TREATMENT OF PORTAL HYPERTENSION (PH) IN CHILDREN AND IT'S RESULTS
JP3143841B2 (en) Switch circuit of high-speed synthesizer
JPS6038828A (en) Digital and analog-contained integrated circuit device
JP3036135B2 (en) Signal input selection circuit
Leidich Amplifier Circuit
KR900002059Y1 (en) Analoge signal converter for mono monitor
GROCHOWSKI et al. 3A10 The Separation of Xipho-omphalo-ischio-paqus Type Conjoined Twins From Cracow
Nakajo et al. JS-I-7 CHOICE OF TREATMENT FOR NECROTIZING ENTERROCOLITIS
JPH0638492Y2 (en) Analog switch circuit
JP2001237748A (en) System for reducing waveform distortion and crosstalk between signal circuits
JPH05167411A (en) Microcomputer
JPH0314815Y2 (en)
JPH0555840A (en) Signal input selecting circuit
JJ THE SURGICAL TREATMENT OF CONGENITAL ANOMALIES OF THE URETERO_VESICAL JUNCTION
JPS5818504U (en) Biosignal amplification device
Motoyama Pathophysiology of Congenital Diaphragmatic Hernia
JPH04259173A (en) Video input changeover circuit
Tanyel 3A9 Testicular Deterioration During Undescendence May Result From Hypoxia
金丸昌憲 et al. 28p-WD-5 Generalised q-analogue of Legendre Polynomials