JPH02113314A - Constant voltage device - Google Patents

Constant voltage device

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Publication number
JPH02113314A
JPH02113314A JP26740288A JP26740288A JPH02113314A JP H02113314 A JPH02113314 A JP H02113314A JP 26740288 A JP26740288 A JP 26740288A JP 26740288 A JP26740288 A JP 26740288A JP H02113314 A JPH02113314 A JP H02113314A
Authority
JP
Japan
Prior art keywords
voltage
input terminal
amplification stage
potential
reference voltage
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
JP26740288A
Other languages
Japanese (ja)
Other versions
JP2697010B2 (en
Inventor
Katsuhiko Higashiyama
勝比古 東山
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
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Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP26740288A priority Critical patent/JP2697010B2/en
Publication of JPH02113314A publication Critical patent/JPH02113314A/en
Application granted granted Critical
Publication of JP2697010B2 publication Critical patent/JP2697010B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To make a soft start with a large time constant while the potential of a power output terminal is raised from the ground potential to a prescribed voltage by providing circuit constitution wherein a 1st voltage amplification stage is active state even when a reference voltage control input terminal is at the ground potential. CONSTITUTION:The 1st voltage amplification stage 3 is so constituted that all the elements in the constitution circuit are active stage even when the uninverted input terminal 1 is at the ground potential. Therefore, when the reference voltage control terminal 11 is held at the ground potential, a voltage appearing at a power output terminal 7 through an output voltage detection resistance part 9 is held almost at the ground potential. Then when the reference voltage control terminal 11 is controlled to a certain potential lower than the prescribed potential of a reference voltage source 8, the voltage appearing at the power output terminal 7 is held at an intermediate potential lower than the prescribed voltage. A voltage which has a large rise time constant is added thereto to enable the soft start with the large time constant.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、定電圧装置の構成に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to the configuration of a constant voltage device.

従来の技術 近年、定電圧装置はあらゆる産業分野に機能素子として
多用されている。
BACKGROUND OF THE INVENTION In recent years, voltage regulators have been widely used as functional elements in all industrial fields.

以下図面を参照しながら、上述した従来の定電圧装置の
一例について説明する。
An example of the conventional constant voltage device mentioned above will be described below with reference to the drawings.

第3図(、)は、従来の定電圧装置の代表的な回路の一
例を示すものである。第3図(、)において、1は非反
転入力端、2は反転入力端、3は第一の増幅段、4は第
二の増幅段、6は電源入力端、6は第三の増幅段、7は
電源出力端、8は基準電圧源、9は出力電圧検出抵抗部
、13は基準電圧源バイアス用定電流源、16は位相補
正部、24は第二の増幅段を制御するトランジスタ、2
6は第二の増幅段を制御するトランジスタの制御入力端
である。
FIG. 3(,) shows an example of a typical circuit of a conventional constant voltage device. In Figure 3 (,), 1 is a non-inverting input terminal, 2 is an inverting input terminal, 3 is a first amplification stage, 4 is a second amplification stage, 6 is a power supply input terminal, and 6 is a third amplification stage. , 7 is a power output terminal, 8 is a reference voltage source, 9 is an output voltage detection resistor section, 13 is a constant current source for biasing the reference voltage source, 16 is a phase correction section, 24 is a transistor that controls the second amplification stage, 2
6 is a control input terminal of a transistor that controls the second amplification stage.

まず第3図(a)において、電源入力端6に印加された
非安定化直流電圧は、第一の電圧増幅段3と第二の電圧
増幅段4と第三の電圧増幅段6と基準電圧源8と出力電
圧検出抵抗部9とで構成される負帰還増幅器の働きによ
り、電源出力端7には安定化された出力電圧が供給され
る。この電圧値は、基準電圧源8の電圧値と出力電圧検
出抵抗部9のそれぞれの抵抗値、そして第一の電圧増幅
段3と第二の電圧増幅段4と第三の電圧増幅段6とで形
成される開ループ利得の値により決定される。
First, in FIG. 3(a), the unregulated DC voltage applied to the power supply input terminal 6 is applied to the first voltage amplification stage 3, the second voltage amplification stage 4, the third voltage amplification stage 6 and the reference voltage. A stabilized output voltage is supplied to the power supply output terminal 7 by the function of the negative feedback amplifier constituted by the source 8 and the output voltage detection resistor section 9. This voltage value is determined by the voltage value of the reference voltage source 8, the respective resistance values of the output voltage detection resistor section 9, and the voltage values of the first voltage amplification stage 3, the second voltage amplification stage 4, and the third voltage amplification stage 6. It is determined by the value of the open loop gain formed by .

この回路構成は、第三の増幅段6が利得を持っているこ
とからトランジスタのコレクターエミッタ飽和電圧特性
付近まで制御可能な、いわゆる低飽和型定電圧装置であ
る。さて、一般に電源出力端7の電圧を制御するのに、
出力電圧制御入力端を付加して、外部からの制御信号に
より、電源出力端7をグランド電位にしたり、所定の定
電圧状態にしだい場合がある。この目的のため、第二の
電圧増幅段を制御するトランジスタ24と、第二の電圧
増幅段を制御するトランジスタの制御入力端26を付加
している。ここに、第二の電圧増幅段を制御するトラン
ジスタの制御入力端26へ、外部から制御信号を加え、
第二の電圧増幅段を制御するトランジスタ24を飽和状
態、または遮断状態にすることにより、第二の増幅段4
を遮断状態、あるいは能動状態にすることができる。第
二の電圧増幅段4が遮断状態になれば、第三の電圧増幅
段6も遮断状態となり、したがって、電源出方端7が遮
断状態(グランド電位)となる。
This circuit configuration is a so-called low-saturation type constant voltage device that can be controlled to near the collector-emitter saturation voltage characteristics of the transistor because the third amplification stage 6 has a gain. Now, generally speaking, to control the voltage at the power output terminal 7,
An output voltage control input terminal may be added to set the power supply output terminal 7 to ground potential or to a predetermined constant voltage state by means of an external control signal. For this purpose, a transistor 24 for controlling the second voltage amplification stage and a control input 26 of the transistor for controlling the second voltage amplification stage are added. Here, a control signal is applied from the outside to the control input terminal 26 of the transistor that controls the second voltage amplification stage,
By bringing the transistor 24 that controls the second voltage amplification stage into a saturated state or a cutoff state, the second amplification stage 4
can be turned off or activated. When the second voltage amplification stage 4 is in the cutoff state, the third voltage amplification stage 6 is also in the cutoff state, and therefore the power output end 7 is in the cutoff state (ground potential).

第4図(1))は、第4図(、)の基本構成回路の電源
出力端7における出力電圧モードで、第二の電圧増幅段
を制御するトランジスタの制御入力端16をON(飽和
状態)−OFF(遮断状態)した時の状態を表している
FIG. 4(1)) shows the output voltage mode at the power supply output terminal 7 of the basic configuration circuit of FIG. ) - represents the state when turned OFF (blocked state).

発明が解決しようとする課題 しかしながら上記のような構成では、グランド電位から
所定の定電圧状態への移行は、第二の電圧増幅段4なら
びに第三の電圧増幅段6が共に利得を持っていることか
ら、はとんど瞬時に移行するので電源出力端に接続され
た負荷に対する供給電流が極めて大きい場合、突入電流
により瞬間的に電源入力端の電圧が大きく低下し、最悪
の場合は所定の定電圧以下に落ち込み、負荷である接続
回路の誤動作を招いたり、特に最近多用されている、レ
ーザーダイオードや0MO3構造のLSIなどは、電源
投入時の瞬時立ち上がりにより破壊するという問題点を
有していた。
Problem to be Solved by the Invention However, in the above configuration, the transition from the ground potential to a predetermined constant voltage state is caused by the fact that both the second voltage amplification stage 4 and the third voltage amplification stage 6 have gains. Therefore, since the voltage changes almost instantaneously, if the supply current to the load connected to the power supply output terminal is extremely large, the voltage at the power supply input terminal will instantly drop significantly due to the rush current, and in the worst case, the voltage at the power supply input terminal will drop significantly. The problem is that the voltage drops below a constant voltage, causing malfunction of the connected circuit that is the load.In particular, laser diodes and 0MO3 structure LSIs, which are often used recently, have the problem of being destroyed by the instantaneous rise when the power is turned on. Ta.

から所定の定電圧状態への移行は、大きな時定数をもっ
た、ソフトスタート化が可能な定電圧装置を提供するも
のである。
The transition from to a predetermined constant voltage state provides a constant voltage device that has a large time constant and is capable of soft start.

訝題を解決するための手段 上記問題点を解決するために本発明の定電圧装置は、非
反転入力端と、反転入力端と、第一の電圧増幅段と、第
二の電圧増幅段と、電源入力端と、上記電源入力端に一
端が接続された第三の電圧増幅段と、上記第三の電圧増
幅段に一端が接続された電源出力端と、上記非反転入力
端に一端が接続された基準電圧源と、上記反転入力端と
上記電源出力端との間にづ長続された直源電圧検出抵抗
部と、グランド端と、上記基準電圧源の電圧を制御する
基準電圧制御端という構成を備えたものである。
Means for Solving the Problems In order to solve the above problems, the voltage regulator of the present invention includes a non-inverting input terminal, an inverting input terminal, a first voltage amplification stage, and a second voltage amplification stage. , a power supply input terminal, a third voltage amplification stage having one end connected to the power supply input terminal, a power supply output terminal having one end connected to the third voltage amplification stage, and one end connected to the non-inverting input terminal. a connected reference voltage source, a direct voltage detection resistor connected between the inverting input terminal and the power supply output terminal, a ground terminal, and a reference voltage control for controlling the voltage of the reference voltage source. It has a structure called an end.

作  用 本発明は上記した構成によって、基準電圧源の電圧を制
御する基準電圧制御端を付加するとともに、非反転入力
端の電位がグランド電位にある場合でも、第一の電圧増
幅段が遮断することがない回路構成をとることによシ、
グランド電位から所定の定電圧状態への移行は、ただ、
基準ル圧制御入力端の電圧値に依存して決定される。し
たがって、基準電圧源の電圧を制御する基準電圧制御端
に大きな立ち上がり時定数をもった電圧を加えることに
より、大きな時定数をもつ、ソフトスタート化を可能と
することとなる。
Effect: With the above-described configuration, the present invention adds a reference voltage control terminal that controls the voltage of the reference voltage source, and also allows the first voltage amplification stage to shut off even when the potential of the non-inverting input terminal is at the ground potential. By adopting a circuit configuration that does not
The transition from ground potential to a given constant voltage state is simply
It is determined depending on the voltage value at the reference pressure control input terminal. Therefore, by applying a voltage with a large rise time constant to the reference voltage control terminal that controls the voltage of the reference voltage source, it becomes possible to perform a soft start with a large time constant.

実施例 以下本発明の一実施例の定電圧装置について、図面を参
照しながら説明す・る。
EXAMPLE A constant voltage device according to an example of the present invention will be described below with reference to the drawings.

第、1図は本発明の第1の実施例における定電圧装置の
基本構成回路を示すものである。第1図において、1は
非反転入力端、2は反転入力端、3は第一の電圧増幅段
、4は第二の電圧謂幅段、5は電源入力端、6は第三の
電圧増幅段、7は電源出力端、8は基準電圧源、9は出
力電圧検出抵抗部、1oはグランド端、11は基準電圧
制御端、12は基準電圧制御トランジスタ、13は基準
電圧源バイアス用定電流源、14は逆バイアス防止ダイ
オード、16は位相積償部である。
FIG. 1 shows the basic configuration circuit of a voltage regulator according to a first embodiment of the present invention. In Figure 1, 1 is a non-inverting input terminal, 2 is an inverting input terminal, 3 is a first voltage amplification stage, 4 is a second voltage amplitude stage, 5 is a power supply input terminal, and 6 is a third voltage amplification stage. 7 is a power supply output terminal, 8 is a reference voltage source, 9 is an output voltage detection resistor, 1o is a ground terminal, 11 is a reference voltage control terminal, 12 is a reference voltage control transistor, 13 is a constant current for reference voltage source bias 14 is a reverse bias prevention diode, and 16 is a phase accumulator.

以上のように構成された定電圧装置について、以下第1
図(−)及び第1図(′b)を用いてその動作を説明す
る。
Regarding the constant voltage device configured as above, the following is the first section.
The operation will be explained using FIG. 1(-) and FIG. 1('b).

まず第1図(−)において、電源入力端6に印加された
非安定化直流電圧は、第一の電圧増幅段3と第二の電圧
増幅段4と第三の電圧増幅段6と基準電圧源8と出力電
圧演出抵抗部9とで構成される負帰還増幅器の働きによ
り、電源出力端7には安定化された出力電圧が供給され
る。この電圧値は、基準電圧源8の電圧値と出力電圧検
出抵抗部9のそれぞれの抵抗値、そして第一の電圧増幅
段3と第二の電圧増幅段4と第三の電圧増幅段6とで形
成される開ループ利得の値により決定される。
First, in FIG. 1 (-), the unregulated DC voltage applied to the power supply input terminal 6 is applied to the first voltage amplification stage 3, the second voltage amplification stage 4, the third voltage amplification stage 6, and the reference voltage. A stabilized output voltage is supplied to the power supply output terminal 7 by the function of the negative feedback amplifier constituted by the source 8 and the output voltage producing resistor section 9. This voltage value is determined by the voltage value of the reference voltage source 8, the respective resistance values of the output voltage detection resistor section 9, and the voltage values of the first voltage amplification stage 3, the second voltage amplification stage 4, and the third voltage amplification stage 6. It is determined by the value of the open loop gain formed by .

この回路構成は、第三の増幅段6が利得を持つているこ
とからトランジスタのコレクターエミッタ飽和電圧特性
付近まで制御可能な、いわゆる低飽和型定電圧装置であ
る。さて、基準電圧制御端11をグランド電位に制御す
ると、逆バイアス防止ダイオード14の順方向電圧と、
基準電圧制御トランジスタ12のベース−エミッタ間電
圧とは、はぼ同電位にあるので、非反転入力端1はグラ
ンド電位にある。ここに、第一の電圧増幅段3は非反転
入力端1がグランド電位にある場合でも、構成回路内の
すべての素子は能動状態になるように形成されている。
This circuit configuration is a so-called low-saturation type constant voltage device that can be controlled to near the collector-emitter saturation voltage characteristics of the transistor because the third amplification stage 6 has a gain. Now, when the reference voltage control terminal 11 is controlled to the ground potential, the forward voltage of the reverse bias prevention diode 14 and
Since the base-emitter voltage of the reference voltage control transistor 12 is at approximately the same potential, the non-inverting input terminal 1 is at the ground potential. Here, the first voltage amplification stage 3 is formed so that even when the non-inverting input terminal 1 is at ground potential, all elements in the constituent circuit are in an active state.

したがって、反転入力端2の電位は、はぼグランド電位
に保持されるので、出力電圧検出抵抗部9を通って電源
出力端Tに現われる電圧は、はぼグランド電位に維持さ
れることとなる。つぎに、基準電圧制御端11を基準電
圧#、8の所定の電位よりも低い、ある電位に制御する
と、非反転入力端1には、はぼ同一の電圧が現れる。
Therefore, since the potential of the inverting input terminal 2 is held at approximately the ground potential, the voltage appearing at the power supply output terminal T through the output voltage detection resistor section 9 is maintained at approximately the ground potential. Next, when the reference voltage control terminal 11 is controlled to a certain potential lower than the predetermined potential of the reference voltage #, 8, almost the same voltage appears at the non-inverting input terminal 1.

したがって、反転入力端2の電位は、はぼ非反転入力端
1と同一の電位に保持されるので、出力電圧検出抵抗部
9を通って電源出力端7に現れる゛電圧は、所定の電圧
よりも低い、ある中間の電位に維持されることとなる。
Therefore, the potential of the inverting input terminal 2 is held at approximately the same potential as the non-inverting input terminal 1, so that the voltage appearing at the power supply output terminal 7 through the output voltage detection resistor section 9 is lower than the predetermined voltage. is maintained at a certain intermediate potential, which is also low.

さらに基準電圧制御端11を基準電圧源8の電位よりも
大きくした場合は、逆バイアス防止ダイオードの働きに
より、バイアスされないので、非反転入力端1の電位は
基準電圧源8の所定の電位に固定される。したがって、
電源出力端7に現れる電位は所定の出力電圧に固定され
ることとなる。
Furthermore, when the potential of the reference voltage control terminal 11 is made higher than the potential of the reference voltage source 8, the potential of the non-inverting input terminal 1 is fixed at the predetermined potential of the reference voltage source 8 because it is not biased due to the function of the reverse bias prevention diode. be done. therefore,
The potential appearing at the power supply output terminal 7 is fixed at a predetermined output voltage.

以上のように本実施例によれば、基準電圧源の電圧を制
御できる基準電圧制御入力端と、基準電圧制御入力端が
グランド電位にあるときも、第一の電圧増幅段が能動状
態にあるような回路構成を設けることにより、電源出力
端の電位をグランド電位から所定の電圧になるまで、大
きな時定数をもった、ソフトスタート化を可能とするこ
とができる。
As described above, according to this embodiment, even when the reference voltage control input terminal that can control the voltage of the reference voltage source and the reference voltage control input terminal are at ground potential, the first voltage amplification stage is in the active state. By providing such a circuit configuration, it is possible to perform a soft start with a large time constant until the potential of the power supply output terminal reaches a predetermined voltage from the ground potential.

第1図(b)は、第1図(−)の基本構成回路の電源出
力端7における出力電圧モードで、基準電圧源8を制御
する基準電圧制御入力端11をON(開放状態)−〇F
F(グランド電位)した時の状態を表している。
FIG. 1(b) shows the output voltage mode at the power supply output terminal 7 of the basic configuration circuit of FIG. 1(-), with the reference voltage control input terminal 11 controlling the reference voltage source 8 turned on (open state) - F
It represents the state when the voltage is F (ground potential).

以下本発明の第二の実施例について図面を参照しながら
説明する。
A second embodiment of the present invention will be described below with reference to the drawings.

第2図は本発明の第2の実施例を示す定電圧装置の基本
構成回路である。
FIG. 2 is a basic circuit diagram of a voltage regulator according to a second embodiment of the present invention.

同図において、1は非反転入力端、2は反転入力端、3
は第一の電圧増幅段、4は第二〇電圧増幅段、5は電源
入力端、6は第三の電圧増幅段、7は電源出力端、8は
基準電圧源、9は出力電圧検出抵抗部、10はグランド
端、11は基準電圧制御端、12は基準電圧制御トラン
ジスタ、13は基準電圧源バイアス用定電流源、14は
逆バイアス防止ダイオード、16は位相補償部で、以上
は第1図(a)の構成と同様なものである。
In the figure, 1 is a non-inverting input terminal, 2 is an inverting input terminal, and 3 is a non-inverting input terminal.
is the first voltage amplification stage, 4 is the 20th voltage amplification stage, 5 is the power supply input terminal, 6 is the third voltage amplification stage, 7 is the power supply output terminal, 8 is the reference voltage source, 9 is the output voltage detection resistor 10 is a ground terminal, 11 is a reference voltage control terminal, 12 is a reference voltage control transistor, 13 is a constant current source for biasing the reference voltage source, 14 is a reverse bias prevention diode, and 16 is a phase compensation section. The configuration is similar to that shown in Figure (a).

第1図(−)の構成と異なるのは、基準電圧源8として
、抵抗16,18,20,21、トランジスタj7.1
9,22、コンデンサー23から成る回路構成を用いた
点にある。
What is different from the configuration shown in FIG.
9, 22, and a capacitor 23.

上記のように構成された定電圧装置について、以下その
動作を説明する。
The operation of the constant voltage device configured as described above will be described below.

まず、基準電圧源8の中に形成されている回路の、能動
状態における基準電圧値は、トランジスタ22のベース
−エミッタ間電圧(負の温度係数をもつ)と、トランジ
スタ17とトランジスタ19のベース−エミッタ間電圧
の差分値(正の温度係数をもつ)を抵抗20.18で増
倍し加算した値が非反転入力端1に現れる。この電圧値
の設定を約1.2V近辺にすると、極めて温度特性の良
い基準電圧が得られる。この回路構成はバンドギャップ
レファレンスとして知られている。基準電圧制御端11
をグランド電位に制御すると、逆バイアス防止ダイオー
ド14の順方向電圧と、基準電圧制御トランジスタ12
のベース−エミッタ間電圧トハ、ホぼ同電位にあるので
、非反転入力端1はグランド電位にある。このとき、ト
ランジスタ17、トランジスタ19、トランジスタ21
は遮断状態にある。ここに、第一の電圧増幅段3は非反
転入力端1がグランド電位にある場合でも、構成回路内
のすべての累子は能動状態になるように形成されている
。したがって、反転入力端2の電位は、はぼグランド電
位に保持されるので、出力電圧検出抵抗部9を通って電
源出力端7に現れる電圧は、はぼグランド電位に維持さ
れることとなる。つぎに、基準電圧制御端11を基準電
圧源8の所定の電位よりも低い、ある電位に制御すると
、非反転入力端1には、はぼ同一の電圧が現れる。した
がって、反転入力端2の電位は、はぼ非反転入力端1と
同一の電位に保持されるので、出力電圧検出抵抗部9を
通って電源出力端7に現れる電圧は、所定の電圧よりも
低い、ある中間の電位に維持されることとなる。さらに
基準電圧制御端11を基準電圧源8の電位よりも大きく
した場合は、逆バイアス防止ダイオードの働きにより、
バイアスされないので、非反転入力端1の電位は基準電
圧源8の所定の電位(約1.2V)に固定される。した
がって、電源出力端子に現れる″電位は所定の出力電圧
に固定されることとなる。
First, the reference voltage value of the circuit formed in the reference voltage source 8 in the active state is determined by the base-emitter voltage of the transistor 22 (which has a negative temperature coefficient) and the base-emitter voltage of the transistor 17 and the transistor 19. A value obtained by multiplying and adding the difference value of the emitter voltage (having a positive temperature coefficient) by a resistor 20.18 appears at the non-inverting input terminal 1. If this voltage value is set to around 1.2V, a reference voltage with extremely good temperature characteristics can be obtained. This circuit configuration is known as a bandgap reference. Reference voltage control terminal 11
When controlled to the ground potential, the forward voltage of the reverse bias prevention diode 14 and the reference voltage control transistor 12
Since the base-emitter voltages of both are at the same potential, the non-inverting input terminal 1 is at the ground potential. At this time, transistor 17, transistor 19, transistor 21
is in a blocked state. Here, the first voltage amplification stage 3 is formed in such a way that even when the non-inverting input terminal 1 is at the ground potential, all the inverters in the component circuit are active. Therefore, since the potential of the inverting input terminal 2 is held at approximately the ground potential, the voltage appearing at the power supply output terminal 7 through the output voltage detection resistor section 9 is maintained at approximately the ground potential. Next, when the reference voltage control terminal 11 is controlled to a certain potential lower than the predetermined potential of the reference voltage source 8, almost the same voltage appears at the non-inverting input terminal 1. Therefore, the potential of the inverting input terminal 2 is held at approximately the same potential as the non-inverting input terminal 1, so that the voltage appearing at the power supply output terminal 7 through the output voltage detection resistor section 9 is lower than the predetermined voltage. It will be maintained at a low, intermediate potential. Furthermore, when the potential of the reference voltage control terminal 11 is made higher than the potential of the reference voltage source 8, due to the function of the reverse bias prevention diode,
Since it is not biased, the potential of the non-inverting input terminal 1 is fixed to a predetermined potential (approximately 1.2 V) of the reference voltage source 8. Therefore, the potential appearing at the power supply output terminal is fixed at a predetermined output voltage.

以上のように、基準電圧源として、バンドギャップリフ
ァレンスを設けることにより、極めて精度のよい基準電
圧源を実現することができるとともに、電源出力端の電
位をグランド電位から所定の電圧になるまで、大きな時
定数をもった、ソフトスタート化を可能とすることがで
きる。
As described above, by providing a bandgap reference as a reference voltage source, it is possible to realize an extremely accurate reference voltage source, and also to increase the potential of the power supply output terminal from the ground potential to a predetermined voltage. Soft start with a time constant can be achieved.

なお、第一の実施例では、電源入力端6は正の電圧が入
力されるものと仮定して回路構成されているが、負の電
圧の入力に対しても、同様の効果が得られるように、す
べてのトランジスタの極性を逆に、すなわちPNPトラ
ンジスタをNPN)ランジスタに、NPN)ランジスタ
をPNP)ランジスタにそれぞれ入れ換え、逆バイアス
防止ダイオード14の極性を反転して接続してもよい。
In the first embodiment, the circuit is configured on the assumption that a positive voltage is input to the power input terminal 6, but the same effect can be obtained even when a negative voltage is input. Alternatively, the polarities of all the transistors may be reversed, that is, the PNP transistors may be replaced with NPN) transistors, and the NPN) transistors may be replaced with PNP) transistors, and the polarity of the reverse bias prevention diode 14 may be reversed and connected.

発明の効果 以上のように本発明は、基準電圧源の電圧を制御できる
基準電圧制御端を設けることにより、電源出力端の電位
をグランド電位から所定の電圧になるまで、大きな時定
数をもった、ソフトスタート化を可能とすることができ
る。
Effects of the Invention As described above, the present invention provides a reference voltage control terminal that can control the voltage of the reference voltage source, thereby increasing the potential of the power supply output terminal from the ground potential to a predetermined voltage with a large time constant. , it is possible to enable soft start.

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

第1図は本発明の第1の実施例における定電圧装置の基
本構成回路図及びその動作曲線図、第2図は本発明の第
2の実施例における定電圧装置の基本構成回路図、第3
図は従来の定電圧装置の基本構成回路図及びその動作曲
線図である。 1・・・・・・非反転入力端、2・・・・・・反転入力
端、3・・・・・・第一の電圧増幅段、4・・・・・・
第二の電圧増幅段、5・・・・・・電源入力端、6・・
・・・・第三の電圧増幅段、7・・・・・・電源出力端
、8・・・・・・基準電圧源、9・・・・・・出力電圧
検出抵抗部、10・・・・・・グランド端、11・・・
・・・基準電圧制御端、12・・・・・・基準電圧制御
トランジスタ、13・・・・・・基準電圧源バイアス用
定電流源、14・・・・・・逆バイアス防止ダイオード
、16・・・・・・位相補償部。 代理人の氏名 弁理士 粟 野 重 孝 ほか1名第 図 (b) 出力電工 FF N
FIG. 1 is a basic configuration circuit diagram of a constant voltage device according to a first embodiment of the present invention and its operating curve diagram, FIG. 2 is a basic configuration circuit diagram of a constant voltage device according to a second embodiment of the present invention, and FIG. 3
The figure is a basic configuration circuit diagram of a conventional voltage regulator and its operating curve diagram. 1...Non-inverting input terminal, 2...Inverting input terminal, 3...First voltage amplification stage, 4...
Second voltage amplification stage, 5...Power input terminal, 6...
... Third voltage amplification stage, 7 ... Power output terminal, 8 ... Reference voltage source, 9 ... Output voltage detection resistor section, 10 ... ...Grand end, 11...
... Reference voltage control terminal, 12 ... Reference voltage control transistor, 13 ... Constant current source for reference voltage source bias, 14 ... Reverse bias prevention diode, 16. ...Phase compensation section. Name of agent: Patent attorney Shigetaka Awano and one other person Figure (b) Output electrician FF N

Claims (1)

【特許請求の範囲】[Claims] 非反転入力端と、反転入力端と、第一の電圧増幅段と、
第二の電圧増幅段と、電源入力端と、上記電源入力端に
一端が接続された第三の電圧増幅段と、上記第三の電圧
増幅段に一端が接続された電源出力端と、上記非反転入
力端に一端が接続された基準電圧源と上記反転入力端と
上記電源出力端との間に接続された電源電圧検出抵抗部
と、グランド端と、上記基準電圧源の電圧を制御する基
準電圧制御端とを備え、上記非反転入力端の電位がグラ
ンド電位にある場合でも、上記第一の電圧増幅段が遮断
することがなく、また、上記電源出力端の電圧を、上記
基準電圧源で決まる所定の定電圧に達するまでは、上記
基準電圧制御端の入力電圧を設定することにより決定で
きることを特徴とする定電圧装置。
a non-inverting input terminal, an inverting input terminal, a first voltage amplification stage,
a second voltage amplification stage, a power supply input terminal, a third voltage amplification stage having one end connected to the power supply input terminal, a power supply output terminal having one end connected to the third voltage amplification stage; A reference voltage source having one end connected to the non-inverting input terminal, a power supply voltage detection resistor connected between the inverting input terminal and the power supply output terminal, a ground terminal, and the voltage of the reference voltage source are controlled. and a reference voltage control terminal, so that even when the potential of the non-inverting input terminal is at ground potential, the first voltage amplification stage will not be cut off, and the voltage at the power supply output terminal will not be controlled at the reference voltage. A constant voltage device characterized in that the voltage until a predetermined constant voltage determined by a power source is reached can be determined by setting the input voltage of the reference voltage control terminal.
JP26740288A 1988-10-24 1988-10-24 Constant voltage device Expired - Fee Related JP2697010B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26740288A JP2697010B2 (en) 1988-10-24 1988-10-24 Constant voltage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26740288A JP2697010B2 (en) 1988-10-24 1988-10-24 Constant voltage device

Publications (2)

Publication Number Publication Date
JPH02113314A true JPH02113314A (en) 1990-04-25
JP2697010B2 JP2697010B2 (en) 1998-01-14

Family

ID=17444344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26740288A Expired - Fee Related JP2697010B2 (en) 1988-10-24 1988-10-24 Constant voltage device

Country Status (1)

Country Link
JP (1) JP2697010B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006215851A (en) * 2005-02-04 2006-08-17 Toshiba Corp Semiconductor integrated circuit
KR100689256B1 (en) * 2002-02-12 2007-03-02 산켄덴키 가부시키가이샤 stabilized power supply circuit
JP2007249644A (en) * 2006-03-16 2007-09-27 Fuji Electric Device Technology Co Ltd Series regulator circuit
US8242760B2 (en) 2008-08-29 2012-08-14 Ricoh Company, Ltd. Constant-voltage circuit device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100689256B1 (en) * 2002-02-12 2007-03-02 산켄덴키 가부시키가이샤 stabilized power supply circuit
JP2006215851A (en) * 2005-02-04 2006-08-17 Toshiba Corp Semiconductor integrated circuit
JP2007249644A (en) * 2006-03-16 2007-09-27 Fuji Electric Device Technology Co Ltd Series regulator circuit
US8242760B2 (en) 2008-08-29 2012-08-14 Ricoh Company, Ltd. Constant-voltage circuit device

Also Published As

Publication number Publication date
JP2697010B2 (en) 1998-01-14

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