JPH03245728A - Power circuit - Google Patents
Power circuitInfo
- Publication number
- JPH03245728A JPH03245728A JP2041913A JP4191390A JPH03245728A JP H03245728 A JPH03245728 A JP H03245728A JP 2041913 A JP2041913 A JP 2041913A JP 4191390 A JP4191390 A JP 4191390A JP H03245728 A JPH03245728 A JP H03245728A
- Authority
- JP
- Japan
- Prior art keywords
- address
- resistor
- variable resistor
- variable
- power supply
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電源回路に関し、特に外部制御用電子回路網等
に用いる電源回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply circuit, and more particularly to a power supply circuit used in an external control electronic circuit network.
従来の外部制御用電子回路網等に用いる電源回路は、出
力電圧が一定値に固定されており、出力電圧を変える必
要があるときは、オペレータが電源回路に設けである可
変抵抗器を動かして所望の１出力電圧となるように設定
しなければならない構成となっている。In conventional power supply circuits used for external control electronic circuit networks, the output voltage is fixed at a constant value, and when the output voltage needs to be changed, the operator moves a variable resistor installed in the power supply circuit. The configuration has to be set so that a desired single output voltage is obtained.
上述したように、従来の外部制御用電子回路網等に用い
る電源回路は、オペレータが可変抵抗器を手動で操作す
る必要があるため、出力電圧を変えなけれはならないと
き、迅速な調整を行うことができないという欠点がある
。As mentioned above, conventional power supply circuits used in external control electronic networks require operators to manually operate variable resistors, making it difficult to make quick adjustments when the output voltage needs to be changed. The disadvantage is that it cannot be done.
本発明の電源回路は、外部のコントロール装置によって
指定されたアドレス信号を入力する複数個のアドレス選
択端子と、前記アドレス選択端子に接続されて選択動作
を行う複数個のデマルチプレクサと、前記デマルチプレ
クサによって前記アドレス信号に対応する可変抵抗器を
選択される可変抵抗器群と、入力端子に接続された出力
可変電源用ＩＣと、前記出力可変電源用ＩＣと並列に接
続した抵抗器とを備え、前記可変抵抗器群と前記抵抗器
とを直列に接続したものである。The power supply circuit of the present invention includes: a plurality of address selection terminals into which address signals specified by an external control device are input; a plurality of demultiplexers connected to the address selection terminals to perform selection operations; a variable resistor group in which a variable resistor corresponding to the address signal is selected by, an output variable power supply IC connected to an input terminal, and a resistor connected in parallel with the output variable power supply IC; The variable resistor group and the resistor are connected in series.
次に本発明の実施例について図面を参照して説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
第１図に示すように、本実施例は、入力端子１と、この
入力端子１に接続した出力可変電源用ＩＣ２と、出力可
変電源用ＩＣ２と並列に接続した抵抗器３と、それらに
接続した８力端子４と、複数個の可変抵抗器を並列に接
続した可変抵抗器群５と、可変抵抗器群５の中の指定さ
れた可変抵抗器を選択するデマルチプレクサ６と、デマ
ルチプレクサ６に所定のアドレスを入力する複数個のア
ドレス選択端子７と、アドレス選択端子７と並列に設け
た選択信号端子８とを組合わせた構成を有している。As shown in FIG. 1, this embodiment includes an input terminal 1, an output variable power supply IC 2 connected to the input terminal 1, a resistor 3 connected in parallel with the output variable power supply IC 2, and a resistor 3 connected to them. a variable resistor group 5 in which a plurality of variable resistors are connected in parallel, a demultiplexer 6 for selecting a designated variable resistor from the variable resistor group 5, and a demultiplexer 6. It has a configuration in which a plurality of address selection terminals 7 into which predetermined addresses are inputted and a selection signal terminal 8 provided in parallel with the address selection terminals 7 are combined.
複数個のアドレス選択端子７を介して外部のコントロー
ル装置から所定のアドレスを入力すると、このアドレス
はデマルチプレクサ６に入力する。デマルチプレクサ６
では、指定されたアドレスによって可変抵抗器群５の中
の対応する可変抵抗器を選択する。このとき、可変抵抗
器と抵抗器３との抵抗値による分圧比によって出力可変
電源用ＩＣ２の出力電圧を制御する。When a predetermined address is input from an external control device via a plurality of address selection terminals 7, this address is input to the demultiplexer 6. Demultiplexer 6
Then, the corresponding variable resistor in the variable resistor group 5 is selected according to the specified address. At this time, the output voltage of the output variable power supply IC 2 is controlled by the voltage division ratio based on the resistance values of the variable resistor and the resistor 3.
選択信号端子８に入力する信号によってデマルチプレク
サ６を複数個選択するようにすることもできる。It is also possible to select a plurality of demultiplexers 6 by a signal input to the selection signal terminal 8.
以上説明したように、本発明の電源回路は、可変抵抗器
を選択するアドレスを外部のコントロール装置からから
入力し、これによってデマルチプレクサを高速で動作さ
せて出力電圧の切替えを自動的に行うことができるとい
う効果がある。As explained above, the power supply circuit of the present invention inputs an address for selecting a variable resistor from an external control device, thereby operating the demultiplexer at high speed and automatically switching the output voltage. It has the effect of being able to.
第１図は本発明の一実施例を示す回路図である。
図において
１・・・・・・入力端子、２・・・・・・出力可変電源
用ＩＣｌ３・・・・・・抵抗器、４・・・・・・出力端
子、５・・・・・・可変抵抗器群、６・・・デマルチプ
レクサ、７・・・・・・アドレス選択端子、
・・選択信号端子。FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, 1...Input terminal, 2...ICl3 for variable output power supply...Resistor, 4...Output terminal, 5... Variable resistor group, 6... demultiplexer, 7... address selection terminal,... selection signal terminal.
Claims (1)
ス信号を入力する複数個のアドレス選択端子と、前記ア
ドレス選択端子に接続されて選択動作を行う複数個のデ
マルチプレクサと、前記デマルチプレクサによって前記
アドレス信号に対応する可変抵抗器を選択される可変抵
抗器群と、入力端子に接続された出力可変電源用ＩＣと
、前記出力可変電源用ＩＣと並列に接続した抵抗器とを
備え、前記可変抵抗器群と前記抵抗器とを直列に接続し
たことを特徴とする電源回路。 ２、外部のコントロール装置によって指定されたアドレ
ス信号を入力する複数個のアドレス選択端子と、前記ア
ドレス選択端子に接続されて選択動作を行う複数個のデ
マルチプレクサと、前記デマルチプレクサによって前記
アドレス信号に対応する可変抵抗器を選択される可変抵
抗器群と、入力端子に接続された出力可変電源用ＩＣと
、前記出力可変電源用ＩＣと並列に接続した抵抗器と、
前記アドレス選択端子と並列に設けた選択信号端子とを
備え、前記可変抵抗器群と前記抵抗器とを直列に接続し
、前記選択信号端子に入力した信号によって前記複数個
のデマルチプレクサを２個以上選択するようにしたこと
を特徴とする電源回路。[Claims] 1. A plurality of address selection terminals into which address signals specified by an external control device are input, a plurality of demultiplexers connected to the address selection terminals and performing selection operations, and the demultiplexer connected to the address selection terminals to perform selection operations; A variable resistor group in which a variable resistor corresponding to the address signal is selected by a multiplexer, an output variable power supply IC connected to an input terminal, and a resistor connected in parallel with the output variable power supply IC. , A power supply circuit characterized in that the variable resistor group and the resistor are connected in series. 2. A plurality of address selection terminals into which address signals specified by an external control device are input; a plurality of demultiplexers connected to the address selection terminals to perform selection operations; a variable resistor group from which a corresponding variable resistor is selected; an output variable power source IC connected to an input terminal; a resistor connected in parallel with the output variable power source IC;
a selection signal terminal provided in parallel with the address selection terminal, the variable resistor group and the resistor are connected in series, and the plurality of demultiplexers are connected to two by a signal input to the selection signal terminal. A power supply circuit characterized by having the above selections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2041913A JPH03245728A (en) | 1990-02-21 | 1990-02-21 | Power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2041913A JPH03245728A (en) | 1990-02-21 | 1990-02-21 | Power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03245728A true JPH03245728A (en) | 1991-11-01 |
Family
ID=12621504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2041913A Pending JPH03245728A (en) | 1990-02-21 | 1990-02-21 | Power circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03245728A (en) |
-
1990
- 1990-02-21 JP JP2041913A patent/JPH03245728A/en active Pending
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