JPS59188715A - Constant-voltage circuit - Google Patents

Constant-voltage circuit

Info

Publication number
JPS59188715A
JPS59188715A JP6176383A JP6176383A JPS59188715A JP S59188715 A JPS59188715 A JP S59188715A JP 6176383 A JP6176383 A JP 6176383A JP 6176383 A JP6176383 A JP 6176383A JP S59188715 A JPS59188715 A JP S59188715A
Authority
JP
Japan
Prior art keywords
voltage circuit
loads
load
electric current
constant
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
JP6176383A
Other languages
Japanese (ja)
Inventor
Akihiro Kajiwara
梶原　章弘
Junichi Funakoshi
船越　順一
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6176383A priority Critical patent/JPS59188715A/en
Publication of JPS59188715A publication Critical patent/JPS59188715A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/577—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads
    • G05F1/585—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads providing voltages of opposite polarities

Abstract

PURPOSE:To supply a relatively large electric current without using any large scale transistor and without causing no voltage variation in a low-impedance load, by connecting loads with each other in series. CONSTITUTION:Loads L1 and L2 are connected with each other in series and the output line of a constant-voltage circuit is connected between the loads L1 and L2. The constant-voltage circuit is formed in such a way that the base and emitter of a reverse conducting type transistor Q1 are connected with the base and emitter of another reverse conducting type transistor Q2, respectively, and their common base and common emitter are connected with a Zener diode ZD and the outut line, respectively. Moreover, collectors of each transistor Q1 and Q2 are connected with a power source through resistances R1 and R3, respectively. Since an electric current equal to the difference between an electric current I1 flowing to the load L1 and another electric current I2 flowing to the load L2 flows to the constant-voltage circuit, the difference electric current becomes smaller and, therefore, the voltage variation becomes smaller, even though the values of the electric currents I1 and I2 are both large.

Description

【発明の詳細な説明】 （１）発明の技術分野 本発明は、単一電源より２種類の電圧を作成じ別々の負
荷に電源を供給する定電圧回路に係り。DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a constant voltage circuit that generates two types of voltage from a single power source and supplies power to different loads.

特にインピーダンスの低い負荷に電圧変動なく電源供給
できる定電圧回路に関する。In particular, it relates to a constant voltage circuit that can supply power to a load with low impedance without voltage fluctuation.

（２）従来技術と問題点 従来定電圧回路としては、ツェナーダイオード。(2) Conventional technology and problems A Zener diode is a conventional constant voltage circuit.

オペアンプのボルテージフォロア、トランジスタのエミ
ソクフォロア等あるが、出力電流は比較的小さなもので
あり、大きな出力電流を取り出そうとすると、大容量の
トランジスタを使用しなければならないという欠点があ
る。There are operational amplifier voltage followers, transistor emitter followers, etc., but the output current is relatively small, and if you want to get a large output current, you have to use a large capacity transistor.

（３）発明の目的 本発明の目的は、上記従来の問題点を解決すべく、負荷
どうしを直列に接続することにより、大容量のトランジ
スタを用いることなく５低インピーダンスの負荷にも電
圧変動なく、比較的大電流を供給できる定電圧回路を提
供するにある。(3) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned conventional problems by connecting the loads in series, without using large capacity transistors, and without voltage fluctuation even on low impedance loads. The object of the present invention is to provide a constant voltage circuit that can supply a relatively large current.

（４）発明の構成 本発明は、上記目的を達成するために、負荷を直列に接
続し、該負荷の間に定電圧回路の出力線を接続し、前記
出力線の電流方向を前記負荷のインピーダンスにより制
御する手段を備え、インピーダンスの低い負荷に電圧変
動なく電源供給することを特徴とする。(4) Structure of the Invention In order to achieve the above object, the present invention connects loads in series, connects an output line of a constant voltage circuit between the loads, and directs the current direction of the output line to that of the load. It is characterized by having means for controlling by impedance and supplying power to a load with low impedance without voltage fluctuation.

（５）発明の実施例 以下２本発明を実施例により詳細に説明する。(5) Examples of the invention The present invention will be explained in detail below using two examples.

図面は本発明の定電圧回路構成図である。図中Ｌ＋　、
Ｌｍは負荷、Ｑ、、Ｑンはトランジスタ。The drawing is a configuration diagram of a constant voltage circuit according to the present invention. In the figure, L+,
Lm is a load, Q, , Qn are transistors.

Ｒ，−Ｒ？は抵抗、ＺＤはツェナーダイオード。R, -R? is a resistor and ZD is a Zener diode.

Ｖｃｃ、Ｖｓｓは電源電圧である。Vcc and Vss are power supply voltages.

今、負荷Ｌ７　のみが接続されているとすれば。Now, suppose only load L7 is connected.

Ｖｃｃ、Ｖｓｓ間で接続されたトランジスタＱＦ。Transistor QF connected between Vcc and Vss.

Ｑ２はともにオン状態であるので、負荷電流１ｙは。Since both Q2 are in the on state, the load current 1y is.

Ｖｃｃ→負荷Ｌ７→トランジスタＱ７→Ｖｓｓと流れ、
また負荷Ｌλのみが接続されている場合。The flow is Vcc → load L7 → transistor Q7 → Vss,
Also, when only the load Lλ is connected.

負荷電流■ユは、Ｖｃｃ→トランジスタＱγ−負荷ＬＸ
　４Ｖ　Ｓ　’Ｓと流れる。従って、負荷Ｌ７．Ｌλを
直列接続し、電源供給すると定電圧回路の出力電流Ｉは
。Load current ■ is Vcc → transistor Qγ - load LX
It flows as 4V S'S. Therefore, load L7. When Lλ is connected in series and power is supplied, the output current I of the constant voltage circuit is:

１−Ｉｘ　　１７　　（電流の流出方向を正とする）と
なる。1-Ix 17 (assuming the outflow direction of the current is positive).

かかる構成をとることにより、負荷のインピーダンスが
低くても、定電圧回路の出力電流を低く抑えることが可
能となり、電圧変動をなくすることができる。By adopting such a configuration, even if the impedance of the load is low, it is possible to suppress the output current of the constant voltage circuit to a low level, and it is possible to eliminate voltage fluctuations.

また、出力電圧はＶｃｃ、Ｖｓｓ、ツェナー電圧Ｖｚを
変えることにより種々の負荷に対応できる。Furthermore, the output voltage can be adapted to various loads by changing Vcc, Vss, and Zener voltage Vz.

以上１本発明の実施例によれば、トランジスタの容量が
小さくて良いこと２発熱が少ないこと。According to the embodiments of the present invention, the capacitance of the transistor can be small. 2. There is little heat generation.

各負荷に独立して供給するより部品点数が少ないこと、
実装スペースを小さくできること等の効果がある。Fewer parts than supplying each load independently;
This has the effect of reducing the mounting space.

（６）発明の効果 本発明によれば、負荷どうしを直列に接続してその間に
定電圧回路の出力を接続してそこを定電圧に保つように
電源供給するので、定電圧回路の出力電流は２つの負荷
の消費電流の差だけに抑えることができ小さな容量で、
大きな負荷を駆動可能とする。(6) Effects of the Invention According to the present invention, the output of the constant voltage circuit is supplied by connecting the loads in series and connecting the output of the constant voltage circuit between them to maintain the constant voltage, so that the output current of the constant voltage circuit is is a small capacity that can be suppressed to just the difference in current consumption between two loads,
Able to drive large loads.

また、定電圧回路の出力側の容量を小さくすることがで
きるので２発熱を少なく且つ小型化が図られコストダウ
ンにも寄与する。In addition, since the capacity on the output side of the constant voltage circuit can be reduced, heat generation is reduced and miniaturization is achieved, which also contributes to cost reduction.

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

図面は本発明の定電圧回路の実施例構成図である。 Ｑｔ　、　Ｑ２　＋　トランジスタ、Ｒ７〜Ｒ３；抵抗
。The drawing is a configuration diagram of an embodiment of a constant voltage circuit according to the present invention. Qt, Q2 + transistor, R7-R3; resistor.

Claims (1)

【特許請求の範囲】 負荷を直列に接続し、該負荷の間に定電圧回路の出力線
を接続し、前記出力線の電流方向を前記負荷のインピー
ダンスにより制御する手段を備え。 インピーダンスの低い負荷に電圧変動なく電源供給する
こ′とを特徴とする淀電圧回路。[Scope of Claims] Loads are connected in series, an output line of a constant voltage circuit is connected between the loads, and the current direction of the output line is controlled by the impedance of the load. A static voltage circuit that is characterized by supplying power to low impedance loads without voltage fluctuations.
JP6176383A 1983-04-08 1983-04-08 Constant-voltage circuit Pending JPS59188715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6176383A JPS59188715A (en) 1983-04-08 1983-04-08 Constant-voltage circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6176383A JPS59188715A (en) 1983-04-08 1983-04-08 Constant-voltage circuit

Publications (1)

Publication Number Publication Date
JPS59188715A true JPS59188715A (en) 1984-10-26

Family

ID=13180496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6176383A Pending JPS59188715A (en) 1983-04-08 1983-04-08 Constant-voltage circuit

Country Status (1)

Country Link
JP (1) JPS59188715A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012090435A (en) * 2010-10-20 2012-05-10 Mitsubishi Electric Corp Drive circuit and semiconductor device equipped with the same
EP2725446A1 (en) * 2012-10-23 2014-04-30 Samsung Electro-Mechanics Co., Ltd Electronic circuit arrangement with ground and reference electric potential

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512247U (en) * 1978-07-07 1980-01-25
JPS585592A (en) * 1981-06-29 1983-01-12 日立電線株式会社 Hose for absorbing pulsation of pressure fluid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512247U (en) * 1978-07-07 1980-01-25
JPS585592A (en) * 1981-06-29 1983-01-12 日立電線株式会社 Hose for absorbing pulsation of pressure fluid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012090435A (en) * 2010-10-20 2012-05-10 Mitsubishi Electric Corp Drive circuit and semiconductor device equipped with the same
EP2725446A1 (en) * 2012-10-23 2014-04-30 Samsung Electro-Mechanics Co., Ltd Electronic circuit arrangement with ground and reference electric potential

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