JPH0132690B2 - - Google Patents
Info
- Publication number
- JPH0132690B2 JPH0132690B2 JP54148696A JP14869679A JPH0132690B2 JP H0132690 B2 JPH0132690 B2 JP H0132690B2 JP 54148696 A JP54148696 A JP 54148696A JP 14869679 A JP14869679 A JP 14869679A JP H0132690 B2 JPH0132690 B2 JP H0132690B2
- Authority
- JP
- Japan
- Prior art keywords
- tally
- latch circuit
- push button
- output
- circuit
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/693—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
Landscapes
- Manipulation Of Pulses (AREA)
- Electronic Switches (AREA)
Description
【発明の詳細な説明】
本発明は、押しボタンによるスイツチヤーの制
御回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pushbutton switcher control circuit.
第１図は従来のこの種のスイツチヤーの制御回
路の構成を示す図であり、複数の制御ボタン（ノ
ンロツクボタン）B1〜Biであり、そしてそれぞ
れの制御ボタンB1〜Biに対応してタリーランプ
L1〜Liが設けられている。ボタンB1〜Biとラン
プL1〜Liとはケーブル１により離れた所にある
ラツチ回路２及びタリー駆動回路３とそれぞれ接
続されている。制御ボタンによつて入力された信
号はケーブル１を経てラツチ回路２でラツチされ
る。ラツチ出力はスイツチヤー４とタリー駆動回
路３へ送られる。ラツチ回路２からの信号により
制御ボタンが指定されたスイツチヤー４内の接点
は閉じ、それと同時にタリー駆動回路３からタリ
ー信号がタリーランプに返され、対応するランプ
が点灯し、接点が閉じていることを示す。第１図
のようなスイツチヤーの制御回路では制御ボタン
からの信号を送る制御線と戻つてくるタリー信号
を送るタリー線とはそれぞれ別々に設けられてお
り、ケーブル１の容量は、大きなものが必要とな
つていた。 FIG. 1 is a diagram showing the configuration of a conventional control circuit of this type of switcher, in which there are a plurality of control buttons (non-lock buttons) B 1 to Bi, and corresponding to each control button B 1 to Bi. tally lamp
L 1 to Li are provided. Buttons B 1 -Bi and lamps L 1 -Li are connected by cable 1 to latch circuit 2 and tally drive circuit 3, respectively, located at remote locations. The signal input by the control button is latched by a latch circuit 2 via a cable 1. The latch output is sent to the switcher 4 and tally drive circuit 3. The contact in the switcher 4 to which the control button is designated is closed by the signal from the latch circuit 2, and at the same time, the tally signal is returned to the tally lamp from the tally drive circuit 3, the corresponding lamp lights up, and the contact is closed. shows. In the switcher control circuit shown in Figure 1, the control line that sends the signal from the control button and the tally line that sends the return tally signal are provided separately, so the capacity of cable 1 needs to be large. It was becoming.
したがつて、本発明の目的は制御ボタンからの
信号を送る制御線と戻つてくるタリー信号を送る
タリー線を共通化し、制御卓と切替部とを結ぶケ
ーブル線の容量を小さくできるスイツチヤーの制
御回路を提供することである。 Therefore, an object of the present invention is to provide a switcher control system that uses a common control line for sending signals from a control button and a tally line that sends back tally signals, thereby reducing the capacity of the cable line connecting the control console and the switching unit. The purpose is to provide circuits.
本発明によれば、ラツチ回路の入力側に逆流防
止のダイオードを設けるとともに、タリー駆動回
路の出力側に電圧シフト素子をおくことにより制
御線とタリー線とを共用したスイツチヤーの制御
回路が得られる。 According to the present invention, by providing a diode for preventing backflow on the input side of the latch circuit and placing a voltage shift element on the output side of the tally drive circuit, it is possible to obtain a switcher control circuit that shares the control line and the tally line. .
次に本発明の一実施例の図面を参照して本発明
を詳細に説明する。第２図は本発明の一実施例を
示す図であり、図でラツチ回路２の入力側には逆
流防止用のダイオードD1〜Diが挿入され、そし
タリー駆動回路３の出力側には電圧シフト素子と
してツエナーダイオードZ1〜Ziが挿入されて、制
御線とタリー線とが共通化されている。ラツチ回
路の入力側にはバイアス電圧VDが与えられてい
るが、制御ボタンB1Biを押したとき、、ダイオ
ードD1〜Diを通して、接地されるので、ラツチ
回路の入力側は「ロー」となり、そのタイミング
を利用してその入力がラツチされる。次にタリー
駆動回路３から接地レベルのタリー信号が返さ
れ、ダイオードZ1〜Ziを通じてタリーランプが点
灯する。このときラツチ側の入力はダイオードZ1
〜Ziの電圧シフト効果により「ハイ」となるよう
にして、制御線とタリー線を共用できる。ラツチ
回路２は押しボタンB1〜Biのいづれかが押され
たときこのタイミングを利用して複数の入力状態
をラツチする。その後押された押しボタンが開い
て入力レベルがすべて「ハイ」になつても、次に
押しボタンB1〜Biの１つが押されるまでこの状
態を保持し、次に押されたときに新たな入力状態
をラツチする。 Next, the present invention will be described in detail with reference to the drawings of an embodiment of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention. In the figure, diodes D 1 to Di for backflow prevention are inserted on the input side of the latch circuit 2, and a voltage is inserted on the output side of the tally drive circuit 3. Zener diodes Z 1 to Zi are inserted as shift elements, and the control line and tally line are shared. A bias voltage V D is applied to the input side of the latch circuit, but when the control button B 1 Bi is pressed, it is grounded through the diodes D 1 to Di, so the input side of the latch circuit becomes "low". Then, the input is latched using that timing. Next, a ground level tally signal is returned from the tally drive circuit 3, and the tally lamp is lit through the diodes Z1 to Zi. At this time, the input on the latch side is diode Z1
The control line and tally line can be shared by making it "high" due to the voltage shift effect of ~Zi. The latch circuit 2 latches a plurality of input states using this timing when any of the push buttons B 1 to Bi is pressed. Even if the pressed pushbutton opens and all input levels become "high", this state will be maintained until one of the pushbuttons B 1 to Bi is pressed next, and the next time the pushbutton is pressed, a new Latch the input state.
次に、ラツチ回路２の入力側に抵抗を通じて印
加される電圧VD、逆流防止用ダイオードの順方
向の電圧VF、電圧シフト用のシフト用のシフト
ダイオードZ1〜Ziにおけるシフト電圧Vs及びラ
ツチ回路２のスレツシユホールド電圧VHとの関
係を説明する。第３図は各電圧の各電圧の関係を
示す図であり。これを参照しながら説明してゆ
く。まず制御ボタンＢを押すと、ラツチ回路の入
力の電圧はVFとなり、これがスレツシユホール
ド電圧VH以下でであるため「ロー」レベルとな
りラツチされる。ラツチ出力はタリー駆動回路３
をを動作させ、タリー出力が接地電位（GND）
となる。ここで制御ボタンは離され、タリー電源
電圧VL（VL＞VD）からの電流は電圧シフト素子
のツエナーダイオードＺを経てタリー駆動回路３
へ流れタリーランプＬが点灯し続ける。このとき
電圧VDからもダイオードＤ、ツエナダイオード
Ｚを経て電流がタリー駆動回路へ流れる。従つて
ラツチ回路２入力の電圧は電圧シフトダイオード
のシフト電圧と逆流防止用ダイオードの順方向電
圧を加えた電圧Vs＋VFとなりこれがラツチ回路
入力のスレツシユホルド電圧VHより高くなつて
「ハイ」レベルとなる。この状態で次の別ボタン
Ｂを押せばラツチ回路２はその「ロー」レベルを
ラツチすることが出来ラツチ出力が次々に変りス
タリーランプＬも次々に点灯することとなる
ここで電圧シフト用のツエナーダイオードＺの
代りに抵抗をつけてタリードライバーに流れる電
流によつてVsを生じさせてもよい。また電圧VL
Vs＞VHとなるようにしてもよい。 Next, the voltage V D applied to the input side of the latch circuit 2 through the resistor, the forward voltage V F of the reverse current prevention diode, the shift voltage Vs at the shift diodes Z 1 to Zi for voltage shifting, and the latch circuit 2 are The relationship with the threshold voltage VH of circuit 2 will be explained. FIG. 3 is a diagram showing the relationship between each voltage. I will explain while referring to this. First, when control button B is pressed, the voltage at the input of the latch circuit becomes VF , and since this is below the threshold voltage VH , it becomes a "low" level and is latched. Latch output is tally drive circuit 3
is operated, and the tally output is at ground potential (GND).
becomes. At this point, the control button is released, and the current from the tally power supply voltage V L (V L > V D ) passes through the Zener diode Z of the voltage shift element to the tally drive circuit 3.
The tally lamp L continues to light up. At this time, current also flows from the voltage V D to the tally drive circuit via the diode D and the Zener diode Z. Therefore, the voltage at the latch circuit 2 input becomes the voltage Vs + V F , which is the sum of the shift voltage of the voltage shift diode and the forward voltage of the reverse current prevention diode, which becomes higher than the threshold voltage V H of the latch circuit input and becomes a "high" level. . In this state, if you press the next button B, the latch circuit 2 will latch the "low" level, and the latch output will change one after another, and the Starry lamp L will also light up one after another. A resistor may be provided in place of the Zener diode Z, and Vs may be generated by the current flowing through the tally driver. Also the voltage V L
It may be arranged such that Vs> VH .
本発明によれば以上説明したように制御線とタ
リー線を共用することが出来るので押ボタンとラ
ツチ回路との間の接続線の数を今までの半分にす
ることが出来る。 According to the present invention, as explained above, since the control line and the tally line can be shared, the number of connection lines between the push button and the latch circuit can be halved.
第１図は従来のスイツチヤーの制御回路を示す
図、第２図は本発明の一実施例を示す図、第３図
は第２図における各部の電位の関係を示す図。
図において、１……ケーブル、２……ラツチ回
路、３……タリー駆動回路、４……スイツチヤ
ー。
FIG. 1 is a diagram showing a conventional switcher control circuit, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing the relationship of potentials of various parts in FIG. 2. In the figure, 1... cable, 2... latch circuit, 3... tally drive circuit, 4... switcher.
Claims (1)
配置された複数の押しボタンスイツチと、 前記押しボタンスイツチに対応して設けられ一
方の端子にタリー電源が供給され、他方の端子が
押しボタンスイツチの出力側に接続された複数の
タリーランプと、 前記複数の押しボタンスイツチの出力をスイツ
チヤー側へ送る複数の伝送路と、 前記複数の伝送路に接続され前記押しボタンス
イツチの出力を入力として受け、出力によりスイ
ツチヤーを制御するラツチ回路と、 前記ラツチ回路からの複数の出力を入力として
受け、出力が前記複数の伝送路にそれぞれ接続さ
れる前記複数のタリーランプを駆動するためタリ
ー駆動回路と、 前記ラツチ回路の入力側で前記伝送路からの信
号経路に挿入される逆流防止用ダイオードと、 前記ラツチ回路の入力側に印加されるバイアス
電源と、 前記タリー駆動回路と前記伝送路との間に挿入
される電圧シフト素子とを具備し、 前記伝送路を前記押しボタンスイツチからの出
力を前記ラツチ回路へ送るためと前記タリー駆動
回路の出力を前記タリーランプへ送るために共有
化したことを特徴とするスイツチヤーの制御回
路。[Claims] 1: a plurality of push button switches arranged in parallel with one terminal connected to a ground potential; a tally power supply provided to one terminal provided corresponding to the push button switch; a plurality of tally lamps whose other terminals are connected to the output side of the push button switch; a plurality of transmission lines for sending the outputs of the plurality of push button switches to the switch side; and a plurality of transmission lines connected to the plurality of transmission lines and connected to the push button. a latch circuit that receives the output of the switch as an input and controls the switcher by the output; and a latch circuit that receives a plurality of outputs from the latch circuit as input and drives the plurality of tally lamps whose outputs are respectively connected to the plurality of transmission lines. a backflow prevention diode inserted into the signal path from the transmission line on the input side of the latch circuit; a bias power supply applied to the input side of the latch circuit; and the tally drive circuit. a voltage shift element inserted between the transmission line and the transmission line for sending the output from the push button switch to the latch circuit and for sending the output of the tally drive circuit to the tally lamp. The control circuit of the switcher is characterized by being shared between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14869679A JPS5672528A (en) | 1979-11-16 | 1979-11-16 | Control circuit of switcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14869679A JPS5672528A (en) | 1979-11-16 | 1979-11-16 | Control circuit of switcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5672528A JPS5672528A (en) | 1981-06-16 |
| JPH0132690B2 true JPH0132690B2 (en) | 1989-07-10 |
Family
ID=15458548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14869679A Granted JPS5672528A (en) | 1979-11-16 | 1979-11-16 | Control circuit of switcher |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5672528A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57196880A (en) * | 1981-05-26 | 1982-12-02 | Nec Corp | Rotating motion generating mechanism |
| JP2595747B2 (en) * | 1990-02-22 | 1997-04-02 | 日本電気株式会社 | Switcher control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT319385B (en) * | 1972-09-29 | 1974-12-27 | Siemens Ag | Circuit arrangement for the interconnection of switching units with circuits external to the circuit system |
| JPS55112034A (en) * | 1979-02-21 | 1980-08-29 | Matsushita Electric Ind Co Ltd | Selection circuit |
-
1979
- 1979-11-16 JP JP14869679A patent/JPS5672528A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5672528A (en) | 1981-06-16 |
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