JPS6158848B2 - - Google Patents
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- Publication number
- JPS6158848B2 JPS6158848B2 JP13142777A JP13142777A JPS6158848B2 JP S6158848 B2 JPS6158848 B2 JP S6158848B2 JP 13142777 A JP13142777 A JP 13142777A JP 13142777 A JP13142777 A JP 13142777A JP S6158848 B2 JPS6158848 B2 JP S6158848B2
- Authority
- JP
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- Prior art keywords
- diode
- constant voltage
- voltage
- 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
- 230000003321 amplification Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
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- Continuous-Control Power Sources That Use Transistors (AREA)
Description
【発明の詳細な説明】
本発明は、定電圧電源回路の出力に直列にダイ
オードが挿入され、このダイオードを介して定電
圧出力を負荷に供給しようとする装置にあつて、
このダイオードの温度変化による電圧変化を補償
すべく定電圧電源装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device in which a diode is inserted in series with the output of a constant voltage power supply circuit, and a constant voltage output is supplied to a load via this diode.
The present invention relates to a constant voltage power supply device to compensate for voltage changes due to temperature changes in the diode.
たとえばCMOSで構成されているICメモリー
が負荷ＲLとして電源である定電圧回路に接続さ
れていた場合、定電圧電源の出力がある程度の時
間又は予期しない事態によつて長時間、供給され
なくとも負荷ＲLに電流を流したいとき、定電圧
回路の出力にダイオードを直列に接続し、負荷Ｒ
Lと並列にコンデンサＣを接続する構成が考えら
れ、一般に斯種定電圧電源装置は、第１図に示さ
れるように、端子１と端子２との間にある定電圧
回路と、定電圧回路の出力と直列に接続され、一
方向素子であるダイオードD2と、負荷ＲLおよび
負荷ＲLと並列に接続されるバツクアツプ用コン
デンサC1から構成されている。 For example, if an IC memory configured with CMOS is connected as a load R L to a constant voltage circuit that is a power source, even if the output of the constant voltage power source is not supplied for a certain period of time or for a long time due to an unexpected situation. When you want to send current to load R , connect a diode in series to the output of the constant voltage circuit, and
A configuration in which a capacitor C is connected in parallel with L is considered, and generally, this type of constant voltage power supply device has a constant voltage circuit between terminals 1 and 2, and a constant voltage circuit as shown in FIG. It consists of a diode D2 , which is a unidirectional element, connected in series with the output of the load R L , and a backup capacitor C1 connected in parallel with the load R L.
しかしながら、このダイオードD2を定電圧回
路の出力側に挿入したために、ダイオードD2の
温度特性によつて負荷ＲLに供給される出力電圧
V3は、第２図に示すように、正の温度係数を有
することになる。 However, since this diode D 2 is inserted on the output side of the constant voltage circuit, the output voltage supplied to the load R L depends on the temperature characteristics of the diode D 2 .
V 3 will have a positive temperature coefficient, as shown in FIG.
すなわち、定電圧回路のツエナーダイオード
D1の温度特性を無視又は完全に補償されている
とすれば、定電圧回路の出力端子２の出力電圧
V2はほぼ一定になり（ただし、第１図の定電圧
回路にあつて、ツエナーダイオードD1は正の温
度係数を持つので出力電圧V2も実際は正の温度
係数を有するが、この変化分はツエナーダイオー
ドD1に直列に負の温度係数を持つダイオードを
入れたりして補償される。）、この出力電圧V2の
温度Ｔ−電圧Ｖ特性を第２図のV2として示す。
またダイオードD2の順方向電圧は通常負の温度
係数を持つているので、温度Ｔが上昇するとその
順方向電圧は減少し、実際に必要な定電圧電源装
置の出力電圧V3は、定電圧電源回路の出力電圧
V2よりダイオードD2の順方向電圧分だけ低くな
るので、出力電圧V2が一定の出力特性を持つな
らば温度Ｔが上昇すれば正の温度係数を持つこと
になり、これを第２図のV3として示す。 In other words, a Zener diode in a constant voltage circuit
If the temperature characteristics of D 1 are ignored or completely compensated for, the output voltage at output terminal 2 of the constant voltage circuit is
V 2 becomes almost constant (however, in the constant voltage circuit shown in Figure 1, since the Zener diode D 1 has a positive temperature coefficient, the output voltage V 2 actually also has a positive temperature coefficient, but this change is compensated by inserting a diode with a negative temperature coefficient in series with the Zener diode D1 .) The temperature T-voltage V characteristic of this output voltage V2 is shown as V2 in FIG.
Furthermore, since the forward voltage of diode D 2 normally has a negative temperature coefficient, as the temperature T rises, its forward voltage decreases, and the output voltage V 3 of the constant voltage power supply that is actually required is equal to the constant voltage Output voltage of power supply circuit
Since it is lower than V 2 by the forward voltage of diode D 2 , if the output voltage V 2 has a constant output characteristic, it will have a positive temperature coefficient as the temperature T rises, and this can be seen in Figure 2. Shown as V 3 .
第２図に示すように、定電圧回路の出力電圧
V2と定電圧電源装置の出力電圧V3との間の幅
（V2−V3）がダイオードD2の順方向電圧特性によ
つて生じ、完全な定電圧回路によつて出力電圧
V2を一定にしても、負荷ＲLには一定化された電
圧が供給されない。 As shown in Figure 2, the output voltage of the constant voltage circuit
The width (V 2 − V 3 ) between V 2 and the output voltage V 3 of the constant voltage power supply is caused by the forward voltage characteristics of the diode D 2 , and the output voltage is reduced by the complete constant voltage circuit.
Even if V 2 is kept constant, a constant voltage is not supplied to the load R L .
この不都合に対処するには、挿入されたダイオ
ードD2の後段に更に定電圧回路を配置させれば
よいが、このような構成をとると、上述した如く
予期しない事態によつて前段の定電圧回路から出
力が供給されない場合、コンデンサC1に充電さ
れたエネルギーにより後段の定電圧回路を駆動す
ることになり、きわめて短い時間しか負荷ＲLに
直流電圧が供給されないことになる。 To deal with this inconvenience, it is possible to further arrange a constant voltage circuit after the inserted diode D2 , but if such a configuration is adopted, the constant voltage of the previous stage may be damaged due to an unexpected situation as described above. If no output is supplied from the circuit, the energy charged in the capacitor C1 will drive the constant voltage circuit at the subsequent stage, and the DC voltage will only be supplied to the load R L for a very short time.
本発明は、上述の欠点に鑑み成されたものであ
り、その目的は、定電圧回路の出力に直列にダイ
オードを挿入し、このダイオードを介して負荷に
出力電圧を供給する定電圧電源装置にあつて、該
ダイオードの順方向ドリフトを補償して負荷に一
定の出力を供給する定電圧安定電源装置を提供す
るにある。 The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide a constant voltage power supply device in which a diode is inserted in series with the output of a constant voltage circuit, and the output voltage is supplied to the load via this diode. Another object of the present invention is to provide a constant voltage stable power supply device that compensates for the forward drift of the diode and supplies a constant output to a load.
本発明は、上述の目的を達成するために、定電
圧回路と負荷との間に直列に挿入されたダイオー
ドの順方向ドリフトを、定電圧回路の出力電圧で
補償すべく特徴を有する。 In order to achieve the above object, the present invention is characterized in that the output voltage of the constant voltage circuit compensates for the forward drift of a diode inserted in series between the constant voltage circuit and the load.
以下、本発明の一実施を図面とともに説明す
る。 Hereinafter, one implementation of the present invention will be described with reference to the drawings.
第３図は、上述第１図に示す、従来の定電圧安
定電源装置に本発明を適用したもので、誤差増幅
トランジスタQ2のベースに接続されている検出
抵抗R3，R4にあつて、負荷電流の流れる主トラ
ンジスタQ1のエミツタ側に接続される検出抵抗
R3と直列に、ダイオードD2と同一温度特性を有
するダイオードD3を挿入し、この直列回路と検
出抵抗R4との分枝点に誤差増幅トランジスタQ2
のベースが接続されている。 FIG. 3 shows an example in which the present invention is applied to the conventional constant voltage stable power supply shown in FIG . , a detection resistor connected to the emitter side of the main transistor Q1 through which the load current flows.
A diode D3 having the same temperature characteristics as the diode D2 is inserted in series with R3 , and an error amplification transistor Q2 is inserted at the branch point between this series circuit and the detection resistor R4 .
The base is connected.
このような一構成にすることにより、ダイオー
ドD2の温度補償を可能にする。すなわち、誤差
増幅トランジスタQ2の基準電圧であるツエナー
ダイオードD1の電圧をＶRとし、誤差増幅トラン
ジスタQ2のＶBEを零、ｈEFが非常に大きいとす
れば、基準電圧ＶRと誤差増幅トランジスタQ2の
ベース電圧Vbが等しくなり、次式が成立する。 Such a configuration allows temperature compensation of diode D2 . That is, if the voltage of the Zener diode D1 , which is the reference voltage of the error amplification transistor Q2 , is V R , the V BE of the error amplification transistor Q2 is zero, and hEF is very large, then the reference voltage V R and the error are The base voltages Vb of the amplification transistors Q2 become equal, and the following equation holds true.
ＶR＝Ｒ４／Ｒ３＋Ｒ４（V2−ＶF） …………(1)
(1)式より定電圧回路の出力電圧V2を求める
と、
V2＝ＶR（Ｒ３＋Ｒ４）／Ｒ４＋ＶF …………(2)
(2)式のようになり、したがつて、検出抵抗R3，
R4は固定であるので、出力電圧V2の変動は基準
電圧ＶR、ダイオードD3の両端電圧ＶFでの全微
分を求めればよく、次式が導びかれる。 V R = R 4 / R 3 + R 4 (V 2 − V F ) …(1) When the output voltage V 2 of the constant voltage circuit is determined from equation (1), V 2 = V R (R 3 + R 4 )/R 4 +V F ......(2) As shown in equation (2), therefore, the detection resistor R 3 ,
Since R 4 is fixed, the variation in the output voltage V 2 can be determined by calculating the total differential with respect to the reference voltage V R and the voltage V F across the diode D 3 , and the following equation is derived.
dV2＝∂Ｖ２／∂ＶＲdVR＋∂Ｖ２／∂ＶＦdVF…
………(3)
(3)式を(2)式に適用すると、
ΔV2＝ｒ１＋ｒ２／ｒ２ΔＶR＋ΔＶF…………(4
)
となり(4)式からＶFの変化分はそのままストレー
トに出力電圧V2の変化分となる。またツエナー
電圧の変動（基準電圧の変動）ΔＶRはｒ１＋ｒ２／ｒ
２と
実際のツエナーダイオードの変動分よりも大きく
出力電圧V2の変動となつて表われる。 dV 2 =∂V 2 /∂V R dV R +∂V 2 /∂V F dV F …
......(3) Applying equation (3) to equation (2), ΔV 2 = r 1 + r 2 /r 2 ΔV R + ΔV F …………(4
) From equation (4), the change in V F directly becomes the change in output voltage V 2 . Also, the variation in Zener voltage (variation in reference voltage) ΔV R is r 1 + r 2 /r
2 , which appears as a variation in the output voltage V 2 that is larger than the variation in the actual Zener diode.
このように、主トランジスタQ1のエミツタと
誤差増幅トランジスタQ2のベースとの間に挿入
されている検出抵抗R3と直列にダイオードD3を
挿入することにより、回路の出力V2を変動させ
ることが可能となり、この変動分をダイオード
D2の温度ドリフトと同一になるようにすれば、
第４図に示すように、定電圧回路の出力電圧V2
は負の温度特性になり、負荷ＲLに供給されるべ
き定電圧安定電源装置の出力電圧V3はダイオー
ドD2の温度特性に関係なくフラツトな出力とな
る。 In this way, the output V 2 of the circuit is varied by inserting the diode D 3 in series with the detection resistor R 3 inserted between the emitter of the main transistor Q 1 and the base of the error amplification transistor Q 2 . This makes it possible to use a diode to absorb this variation.
If we make it the same as the temperature drift of D 2 ,
As shown in Figure 4, the output voltage of the constant voltage circuit V 2
has a negative temperature characteristic, and the output voltage V3 of the constant voltage stable power supply device to be supplied to the load R L becomes a flat output regardless of the temperature characteristic of the diode D2 .
以上の説明は、定電圧回路の出力V2が、ダイ
オードD2の順方向ドリフトに対応する電圧変化
分と、絶対値を同一とし且つ逆温度係数を有する
ように補償されているにすぎない。 In the above explanation, the output V 2 of the constant voltage circuit is simply compensated so that it has the same absolute value as the voltage change corresponding to the forward drift of the diode D 2 and has an inverse temperature coefficient.
なお、ダイオードD2とダイオードD3は温度特
性が全く同一のものが必要であるが、このような
ダイオードには、複数個のダイオードを単一のペ
レツトに作り込んだ複合ダイオード（ダイオード
アレイ）が好適である。 Note that diode D 2 and diode D 3 must have exactly the same temperature characteristics, but such diodes include composite diodes (diode arrays) in which multiple diodes are built into a single pellet. suitable.
また上述の実施例においては、直列帰還型定電
圧回路の正出力電源について述べたが、負出力電
源についても全く同様に行ない得、さらに並列帰
還型定電圧回路も本発明は適用できる。 Further, in the above embodiment, the positive output power source of the series feedback type constant voltage circuit was described, but the same can be applied to the negative output power source, and the present invention is also applicable to the parallel feedback type constant voltage circuit.
本発明は、以上のように、どうしても電源を切
りたくないような負荷回路へ電源が瞬時的に下ち
ても電圧を保持させるために電源に直列にダイオ
ードを入れコンデンサ等で保持させようとする回
路で、なおかつこの電源の温度特性を良好にした
いような場合、特に有効である。 As described above, the present invention attempts to maintain the voltage by inserting a diode in series with the power supply and using a capacitor or the like to maintain the voltage even if the power suddenly drops to a load circuit that does not want to be turned off. This is particularly effective in circuits where it is desired to improve the temperature characteristics of the power supply.
また、本発明によれば、定電圧回路の出力と直
列に挿入されているダイオードの温度係数を特に
抑えなくとも、温度特性のきわめて小さい出力電
圧が得られる。 Further, according to the present invention, an output voltage with extremely small temperature characteristics can be obtained without particularly suppressing the temperature coefficient of the diode inserted in series with the output of the constant voltage circuit.
第１図は従来のバツクアツプコンデンサを備え
た定電圧電源装置を示す図、第２図は第１図に示
す装置の出力電圧における温度特性を示す図、第
３図は本発明を直列帰還型の定電圧安定電源装置
に適用した場合の一実施例を示す図、第４図は本
発明の装置の出力電圧における温度特性を示す図
である。
V1……入力電圧、V2……定電圧回路の出力電
圧、V3……定電圧安定電源装置の出力電圧。
Fig. 1 shows a conventional constant voltage power supply device equipped with a backup capacitor, Fig. 2 shows the temperature characteristics of the output voltage of the device shown in Fig. 1, and Fig. 3 shows a series feedback type power supply according to the present invention. FIG. 4 is a diagram showing an example in which the present invention is applied to a constant voltage stable power supply device, and FIG. 4 is a diagram showing temperature characteristics of the output voltage of the device of the present invention. V 1 ... Input voltage, V 2 ... Output voltage of constant voltage circuit, V 3 ... Output voltage of constant voltage stable power supply.
Claims (1)
並列接続されたバツクアツプ用コンデンサと、該
コンデンサと前記ICメモリーとの並列回路に対
し直列接続された逆流防止用ダイオードと、前記
並列回路と前記ダイオードを介して並列接続され
る温度保償用のダイオードおよび２つの抵抗との
直列回路と、該直列回路の抵抗同士の接続点にベ
ースが接続された誤差増幅トランジスタと、該ト
ランジスタによつて制御される主トランジスタと
より構成し、前記逆流防止用ダイオードと温度保
償用ダイオードとに同一温度特性を有するダイオ
ードを利用したことを特徴とする定電圧安定電源
装置。1. An IC memory as a load, a backup capacitor connected in parallel with the IC memory, a backflow prevention diode connected in series with the parallel circuit of the capacitor and the IC memory, and the parallel circuit and the diode. a series circuit of a temperature-insulating diode and two resistors connected in parallel through the resistor; an error amplification transistor whose base is connected to the connection point between the resistors of the series circuit; and an error amplification transistor controlled by the transistor. 1. A constant voltage stable power supply device comprising a main transistor, and using diodes having the same temperature characteristics as the reverse current prevention diode and the temperature guarantee diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13142777A JPS5465353A (en) | 1977-11-04 | 1977-11-04 | Constanttvoltage stabilizing power source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13142777A JPS5465353A (en) | 1977-11-04 | 1977-11-04 | Constanttvoltage stabilizing power source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5465353A JPS5465353A (en) | 1979-05-25 |
| JPS6158848B2 true JPS6158848B2 (en) | 1986-12-13 |
Family
ID=15057698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13142777A Granted JPS5465353A (en) | 1977-11-04 | 1977-11-04 | Constanttvoltage stabilizing power source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5465353A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915110U (en) * | 1982-07-22 | 1984-01-30 | クラリオン株式会社 | constant voltage circuit |
| JP6566555B2 (en) * | 2015-07-14 | 2019-08-28 | 三菱重工サーマルシステムズ株式会社 | Power converter and air conditioner |
-
1977
- 1977-11-04 JP JP13142777A patent/JPS5465353A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5465353A (en) | 1979-05-25 |
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