JPH0241081B2 - - Google Patents

Info

Publication number
JPH0241081B2
JPH0241081B2 JP56151587A JP15158781A JPH0241081B2 JP H0241081 B2 JPH0241081 B2 JP H0241081B2 JP 56151587 A JP56151587 A JP 56151587A JP 15158781 A JP15158781 A JP 15158781A JP H0241081 B2 JPH0241081 B2 JP H0241081B2
Authority
JP
Japan
Prior art keywords
output
resistor
signal
signal input
switch
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.)
Expired - Lifetime
Application number
JP56151587A
Other languages
Japanese (ja)
Other versions
JPS5853224A (en
Inventor
Takushi Nishikawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15158781A priority Critical patent/JPS5853224A/en
Publication of JPS5853224A publication Critical patent/JPS5853224A/en
Publication of JPH0241081B2 publication Critical patent/JPH0241081B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking

Landscapes

  • Electronic Switches (AREA)

Description

【発明の詳細な説明】 本発明は信号を1つの信号入出力端子より出し
たり入れたりする場合に用いる信号入出力切換装
置に関するものであり、1個の抵抗で入出力イン
ピーダンスを決める抵抗を兼ねることができかつ
切替のためのスイツチも簡単なものですませるこ
とができる信号入出力切換装置を提供しようとす
るものである。
[Detailed Description of the Invention] The present invention relates to a signal input/output switching device used when a signal is input/output from one signal input/output terminal, and one resistor also serves as a resistor to determine input/output impedance. It is an object of the present invention to provide a signal input/output switching device which can perform the following functions and which can also use a simple switch for switching.

第1図は従来例における信号入出力切換装置を
示すものであり、映像情報装置1の信号出力端子
2を出た信号は増幅器3、コンデンサ4、出力イ
ンピーダンスを決める抵抗5を通つて、切換スイ
ツチ6のa端子に入る。この切換スイツチ6の可
動接点がa側にあるとき信号入出力端子7に信号
が出る。次に、信号入出力端子7より信号が入る
と、切換スイツチ6のb接点を通り、入力インピ
ーダンスを決める抵抗8に加えられる。この信号
はコンデンサ9、増幅器10を通つて信号入力端
子11により映像情報装置1に加えられる。
FIG. 1 shows a conventional signal input/output switching device, in which a signal output from a signal output terminal 2 of a video information device 1 passes through an amplifier 3, a capacitor 4, and a resistor 5 that determines the output impedance, and is then transferred to a switching switch. Enter the a terminal of 6. When the movable contact of the changeover switch 6 is on the a side, a signal is output to the signal input/output terminal 7. Next, when a signal is input from the signal input/output terminal 7, it passes through the b contact of the changeover switch 6 and is applied to the resistor 8 that determines the input impedance. This signal is applied to the video information device 1 via a signal input terminal 11 via a capacitor 9 and an amplifier 10.

このように、この装置では出力インピーダンス
を決める抵抗5と入力インピーダンスを決める抵
抗8をそれぞれ必要とするとともに切換スイツチ
6としてはトランジスタを用いた場合には2個必
要であり、リレーを使用する場合には3接点以上
のものが必要となる。
In this way, this device requires a resistor 5 that determines the output impedance and a resistor 8 that determines the input impedance, and when a transistor is used as the selector switch 6, two are required, and when a relay is used, requires three or more contacts.

そこで、本発明は入力インピーダンスを決める
抵抗と出力インピーダンスを決める抵抗とを1個
の抵抗で兼用させ、かつ、切換用のスイツチとし
てトランジスタ1個、あるいは2接点のリレーを
使用することができる信号入出力切換装置を提供
しようとするものであり、以下本発明の実施例に
ついて図面を参照にして説明する。
Therefore, the present invention provides a signal input that allows one resistor to serve as both the resistor that determines the input impedance and the resistor that determines the output impedance, and that can use one transistor or a two-contact relay as a switching switch. The present invention is intended to provide an output switching device, and embodiments of the present invention will be described below with reference to the drawings.

第2図に示すように映像情報装置12の信号出
力端子は増幅器14、コンデンサ15を通つて抵
抗16の一端に接続されている。この抵抗16の
他端は信号入出力端子17に接続されるとともに
コンデンサ18、増幅器19を介して映像情報装
置12の信号入力端子20が接続されている。そ
して、抵抗16の信号出力端子13側のラインと
基準電位点間にオンオフスイツチ21が接続され
ている。このスイツチ21は第3図、第4図に示
すように1個のトランジスタで構成することがで
き、また第5図に示すようにリレー等の2接点の
メカニカルスイツチで構成することができる。
As shown in FIG. 2, a signal output terminal of the video information device 12 is connected to one end of a resistor 16 through an amplifier 14 and a capacitor 15. The other end of this resistor 16 is connected to a signal input/output terminal 17 and also to a signal input terminal 20 of the video information device 12 via a capacitor 18 and an amplifier 19. An on/off switch 21 is connected between the line on the signal output terminal 13 side of the resistor 16 and a reference potential point. This switch 21 can be constructed of one transistor as shown in FIGS. 3 and 4, or can be constructed of a two-contact mechanical switch such as a relay as shown in FIG. 5.

スイツチ21をオフにした場合、信号出力端子
13の信号は抵抗16を通つて信号入出力端子に
出すことができる。スイツチ21をオンにした場
合、信号入出力端子17に入つた信号は、コンデ
ンサ18、増幅器19を通つて端子20に加えら
れる。このように抵抗16を入力インピーダンス
としても出力インピーダンスとしても用いること
ができる。また、スイツチ21として1個のトラ
ンジスタ、2接点のリレー等のメカニカルスイツ
チを用いることができる。
When the switch 21 is turned off, the signal at the signal output terminal 13 can be outputted to the signal input/output terminal through the resistor 16. When the switch 21 is turned on, the signal input to the signal input/output terminal 17 is applied to the terminal 20 through the capacitor 18 and the amplifier 19. In this way, the resistor 16 can be used both as an input impedance and as an output impedance. Further, as the switch 21, a mechanical switch such as one transistor or a two-contact relay can be used.

以上の通り、本発明は信号出力端子を抵抗を介
して信号入出力端子に接続するとともに、この信
号入出力端子を信号入力端子に接続し、上記抵抗
の上記信号出力端子側ラインと基準電位点間に入
出力切換用のオンオフスイツチを設けた信号入出
力切換装置であり1個の抵抗を入力インピーダン
ス素子と出力インピーダンス素子の両方に用いる
ことができるとともに、スイツチとして1個のト
ランジスタあるいは2接点のメカニカルスイツチ
を用いることができるものである。
As described above, the present invention connects a signal output terminal to a signal input/output terminal via a resistor, connects this signal input/output terminal to a signal input terminal, and connects the signal output terminal side line of the resistor to a reference potential point. This is a signal input/output switching device with an on/off switch for input/output switching in between, and one resistor can be used as both the input impedance element and the output impedance element, and one transistor or two contacts can be used as the switch. A mechanical switch can be used.

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

第1図は従来例における信号入出力切換装置の
回路図、第2図は本発明の一実施例における信号
入出力切換装置の回路図、第3図、第4図、第5
図は同装置に用いることができるスイツチの回路
図である。 13……信号出力装置、16……抵抗、17…
…信号入出力装置、20……信号入力端子、21
……スイツチ。
FIG. 1 is a circuit diagram of a signal input/output switching device in a conventional example, FIG. 2 is a circuit diagram of a signal input/output switching device in an embodiment of the present invention, FIGS. 3, 4, and 5.
The figure is a circuit diagram of a switch that can be used in the same device. 13...Signal output device, 16...Resistor, 17...
...Signal input/output device, 20...Signal input terminal, 21
...Switch.

Claims (1)

【特許請求の範囲】[Claims] 1 信号出力端子を抵抗を介して信号入出力端子
に接続するとともに、この信号入出力端子を信号
入力端子に接続し、上記抵抗の上記信号出力端子
側ラインと基準電位点間に、この抵抗を入力イン
ピーダンスとするか出力インピーダンスとするか
を切換える入出力切換用のオンオフスイツチを設
けた信号入出力切換装置。
1 Connect the signal output terminal to the signal input/output terminal via a resistor, connect this signal input/output terminal to the signal input terminal, and connect this resistor between the signal output terminal side line of the resistor and the reference potential point. A signal input/output switching device equipped with an on/off switch for input/output switching to switch between input impedance and output impedance.
JP15158781A 1981-09-24 1981-09-24 Signal input and output switching device Granted JPS5853224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15158781A JPS5853224A (en) 1981-09-24 1981-09-24 Signal input and output switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15158781A JPS5853224A (en) 1981-09-24 1981-09-24 Signal input and output switching device

Publications (2)

Publication Number Publication Date
JPS5853224A JPS5853224A (en) 1983-03-29
JPH0241081B2 true JPH0241081B2 (en) 1990-09-14

Family

ID=15521770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15158781A Granted JPS5853224A (en) 1981-09-24 1981-09-24 Signal input and output switching device

Country Status (1)

Country Link
JP (1) JPS5853224A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236406U (en) * 1985-08-20 1987-03-04

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229612Y2 (en) * 1971-12-17 1977-07-06

Also Published As

Publication number Publication date
JPS5853224A (en) 1983-03-29

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