JPS6222123A - Power supply circuit of electronic appliance - Google Patents
Power supply circuit of electronic applianceInfo
- Publication number
- JPS6222123A JPS6222123A JP16135985A JP16135985A JPS6222123A JP S6222123 A JPS6222123 A JP S6222123A JP 16135985 A JP16135985 A JP 16135985A JP 16135985 A JP16135985 A JP 16135985A JP S6222123 A JPS6222123 A JP S6222123A
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- Prior art keywords
- voltage
- circuit
- constant voltage
- terminal
- rectified
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Abstract
Description
【発明の詳細な説明】
(イ)産業上の利用分野
本発明は、交流電源から整流回路を介して得た非安定化
整流電圧を定電圧回路によって安定化出力を得る電子機
器の電源回路に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a power supply circuit for electronic equipment that obtains a stabilized output from a constant voltage circuit by converting unstabilized rectified voltage obtained from an AC power supply through a rectifier circuit. .
(ロ)従来の技術
一般に電子機器の電源回路は、交流電源からの交流電圧
□な゛整流し、平滑した後に定電圧回路にて安定化され
た定電圧を負荷、例えば種々のICの直流電源端子に加
える構成となっている。(B) Conventional technology In general, power supply circuits for electronic devices rectify and smooth AC voltage from an AC power source, and then apply a constant voltage stabilized in a constant voltage circuit to the load, such as the DC power supply of various ICs. It is configured to be added to the terminal.
この定電圧回路の」”例として、特公昭48−2370
1号が上げられ、複数の安定化電圧を得る構成が示され
ている。As an example of this constant voltage circuit,
No. 1 is raised, and a configuration for obtaining a plurality of stabilizing voltages is shown.
又単に第1及び第2の定電圧回路(IO2)を複数設け
た場合そめ各々を別個に第5図に示すように交流電源(
3)から電源トランス(4)から整流回路(5)を介し
て、前記定電圧回路(1)(2)に接続し、各々を独立
に動作させて、出力端子(6)(7)から安定化された
直流゛電圧を所望の負荷に供給する。In addition, when simply providing a plurality of first and second constant voltage circuits (IO2), each is separately connected to an AC power source (
3) is connected to the constant voltage circuits (1) and (2) through the power transformer (4) and the rectifier circuit (5), and each is operated independently to provide stable voltage from the output terminals (6) and (7). The converted DC voltage is supplied to the desired load.
(ハ)発明が解決しようとする問題点
前述の従来例としての特公昭4g−23701号につい
ては、仮に基になる定電圧回路が正常な動作状態から異
常な動作状態になった場合、別の1つの電圧も定電圧と
はならない欠点があるばかりでなく1回路定数の設定が
極めてクリティカルな面も出て来るので、電子機器の電
源回路としては余り適していない。(C) Problems to be Solved by the Invention Regarding the prior art example of Japanese Patent Publication No. 4G-23701 mentioned above, if the underlying constant voltage circuit goes from a normal operating state to an abnormal operating state, another Not only does it have the disadvantage that even one voltage is not a constant voltage, but also the setting of one circuit constant is extremely critical, so it is not very suitable as a power supply circuit for electronic equipment.
一方第5図に示した電源回路は、仮に第1の出力端子電
圧なV。I、入力電圧をVi、%第2の出力電圧な■。On the other hand, the power supply circuit shown in FIG. 5 assumes that the first output terminal voltage is V. I, the input voltage is Vi, and the second output voltage is ■.
6.入力電圧をV□、前記出力端子電圧の交流減電圧保
証を−A%、定電圧回路(2)における飽和電圧Vsa
tとすると、定格交流電圧におけるV□は
に設定しなければならない。6. The input voltage is V□, the AC reduced voltage guarantee of the output terminal voltage is -A%, and the saturation voltage Vsa in the constant voltage circuit (2)
t, V□ at the rated AC voltage must be set to .
その一実施例としてV、、=5ボルト、Vsat ==
1.5ボルト、A=35%とすれば
Vi、≧10ボルト
となり、(Vat −V。、)×工は定電圧回路(2)
で消費される電力となるので、前記実施例では交流定格
電圧のとき、前記定電圧回路(2)への供給電力の1/
2が無駄に消費されていることになる◎ここで工は定電
圧回路(2)に流れる電流を示す。As an example, V, , = 5 volts, Vsat ==
If 1.5 volts and A=35%, then Vi, ≧10 volts, (Vat - V.,) × E is a constant voltage circuit (2)
Therefore, in the above embodiment, when the AC rated voltage is used, 1/1/2 of the power supplied to the constant voltage circuit (2) is consumed.
2 is wasted.◎Here, ◎ represents the current flowing through the constant voltage circuit (2).
に)問題点を解決するための手段
本発明は、高低電圧の互に異なる複数の定電圧回路を備
えた電源回路において、整流回路の出力側に第1及び第
2の定電圧回路を接続し、該第1及び第2の定電圧回路
の入力側にスイッチング手段を接続し、該スイッチング
手段の制御端子に前記第2の定電圧回路の出力端子を接
続して前記第2の定電圧回路の出力電圧が低下した場合
前記スイッチング手段をオンになし、第1の定電圧回路
の入力端子に現われる第1の整流電圧を前記第2の定電
圧回路の入力電圧として加え、交流定格電圧における定
電圧回路の消費電力を削減する構成である。B) Means for Solving the Problems The present invention provides a power supply circuit including a plurality of constant voltage circuits with different high and low voltages, in which first and second constant voltage circuits are connected to the output side of a rectifier circuit. , a switching means is connected to the input sides of the first and second constant voltage circuits, an output terminal of the second constant voltage circuit is connected to a control terminal of the switching means, and the second constant voltage circuit is controlled. When the output voltage decreases, the switching means is turned on, and the first rectified voltage appearing at the input terminal of the first constant voltage circuit is applied as the input voltage of the second constant voltage circuit, thereby increasing the constant voltage at the AC rated voltage. This configuration reduces the power consumption of the circuit.
(ホ)作用
本発明における第2の定電圧回路の入力端子の電圧降下
時スイッチング手段のオンにより、第1の整流電圧によ
り前記第2の定電圧回路を駆動でき、交流電圧の低下に
よる減電圧保証時、前記第2の定電圧回路における消費
電力の減少を図ることができる。(e) Effect When the voltage at the input terminal of the second constant voltage circuit in the present invention drops, the switching means is turned on, so that the second constant voltage circuit can be driven by the first rectified voltage, and the voltage decreases due to the decrease in AC voltage. At the time of guarantee, it is possible to reduce power consumption in the second constant voltage circuit.
(へ)実施例
図面に従りて本発明の電子機器の電源回路について説明
すると、第1図は本発明の同回路を示す基本構成図、第
2図は同回路の実施回路図、第3図は第2図における各
部波形図、第4図は第2図の特性図を示す。(f) Example The power supply circuit of an electronic device of the present invention will be explained according to the drawings. Fig. 1 is a basic configuration diagram showing the same circuit of the present invention, Fig. 2 is an implementation circuit diagram of the same circuit, and Fig. 3 is a basic configuration diagram showing the same circuit of the present invention. The figure shows a waveform diagram of each part in FIG. 2, and FIG. 4 shows a characteristic diagram of FIG. 2.
図面において、第5図と同一素子には同一図番を付して
あり、(8)はスイッチング手段としての電子スイッチ
、(9)は制御回路としての比較器、、顛は逆流阻止用
のスイッチングダイオード、(ロ)(6)は第1及び第
2の整流出力端子、(至)α4は比較器(9)を構成す
る電位差検出トランジスタ、(至)はスイッチング手段
としてのスイッチングトランジスタ、翰(2)は平滑用
コンデンサを示す。In the drawings, the same elements as in Fig. 5 are given the same figure numbers, (8) is an electronic switch as a switching means, (9) is a comparator as a control circuit, and (9) is a switching device for preventing backflow. diode, (b) (6) are the first and second rectified output terminals, (to) α4 is a potential difference detection transistor constituting the comparator (9), (to) is a switching transistor as a switching means, and (2) ) indicates a smoothing capacitor.
次に本発明の動作について説明すると、先ず第1図にお
いて、電源トランス(4)に対して交流電源(3)より
商用電源としての100Vが加わると、該電源トランス
(4)によって所定の電圧に降圧する〇前記電源トラン
ス(4)の2次側からは1両波整流用のブリッジ接続し
た整流回路(5)を介して第1の整流出力端子(ロ)か
らはVll、第2の整流出力端子(2)からはviの整
流電圧が現われる。(Vcs > Vztとする。)
ここで正常動作時、第1の整流出力端子(6)及び第2
の整流出力端子(財)は所定電圧に達しており、第1の
定電圧回路(1)及プ第2の定電圧回路(2)は所定の
定電圧動作を行う。(スイッチングダイオード(2)は
オンの状態となっている。)従ってこのとき制御回路と
しての比較器(9)に対し、各々第2の整流出力電圧■
4.及び第2の定電圧出力v、、2が加わり、その出力
即ち制御端子(至)罠はオン電圧は加わらず、電子スイ
ッチ(8)はオフを保ち、第1の定電圧端子(6)及び
第2の定電圧端子(7)には各々所定の電圧■。、及び
■。、が現われ、次段に接続される負荷としての種々の
IC等に定電圧が供給されることになる。Next, to explain the operation of the present invention, first in FIG. 1, when 100V as a commercial power source is applied to the power transformer (4) from the AC power source (3), the power transformer (4) adjusts the voltage to a predetermined voltage. The voltage is stepped down from the secondary side of the power transformer (4) through a bridge-connected rectifier circuit (5) for single-wave rectification, and Vll from the first rectifier output terminal (b), and the second rectifier output. A rectified voltage vi appears from the terminal (2). (Set as Vcs > Vzt.) Here, during normal operation, the first rectified output terminal (6) and the second
The rectifier output terminal has reached a predetermined voltage, and the first constant voltage circuit (1) and the second constant voltage circuit (2) perform a predetermined constant voltage operation. (The switching diode (2) is in the on state.) Therefore, at this time, the second rectified output voltage
4. and a second constant voltage output v,,2 are applied to the output, that is, the control terminal (to) trap, no on voltage is applied, the electronic switch (8) remains off, and the first constant voltage terminal (6) and A predetermined voltage ■ is applied to each of the second constant voltage terminals (7). , and■. appears, and a constant voltage is supplied to various ICs and the like as loads connected to the next stage.
一方何らかの原因により、電源トランス(4)の2次側
の電圧が降下すると、制御端子(至)へは比較器(9)
からの制御信号が加わり、電子スイッチ(8)はオンと
なって、第1の整流出力電圧(vL、)が第2の定電圧
回路(2)への入力として加わり、該第2の定電圧回路
(2)は前記第1の整流電圧によって駆動される。ここ
でダイオード顛は電子スイッチ(8)がオンになったと
き、第1の整流出力vL、が、第2の整流出力V、へ逆
流するスイッチングダイオードである。On the other hand, if the voltage on the secondary side of the power transformer (4) drops for some reason, the comparator (9) is connected to the control terminal (to).
, the electronic switch (8) is turned on and the first rectified output voltage (vL, ) is applied as an input to the second constant voltage circuit (2), and the second constant voltage The circuit (2) is driven by said first rectified voltage. Here, the diode structure is a switching diode in which the first rectified output VL flows back to the second rectified output V when the electronic switch (8) is turned on.
ここで第2図における前記交流電源が定格電圧の場合と
低下した場合について説明する。Here, a case where the AC power supply in FIG. 2 is at the rated voltage and a case where the voltage is lowered will be explained.
先ず交流電源が定格電圧のとき
Vu = Vot + vsat + ’d−−”(2
)を満足するV□、が第2の定電圧回路(2)に加わる
。First, when the AC power supply is at the rated voltage, Vu = Vot + vsat + 'd--'' (2
) is applied to the second constant voltage circuit (2).
前記比較器としての電位差検出トランジスタ(至)によ
り、前記電圧V、とVORの電位差を監視しておく。The potential difference between the voltage V and VOR is monitored by the potential difference detection transistor (to) serving as the comparator.
次に交流電源(3)の電圧低下に伴ない、■、2が下記
の式(3)に示す領域に入ったとき、電位差検出トラン
ジスタ(2)α4が各々オン、オフになり、スイッチン
グトランジスタal19はオンになる。Next, as the voltage of the AC power supply (3) decreases, when (2) and (2) enter the region shown in the following equation (3), the potential difference detection transistor (2) α4 turns on and off, respectively, and the switching transistor al19 turns on.
Vi、≦(■。t + Usat” vd )
・・””・・’(3)式(2)及び(3)でUsatは
第2の定電圧回路(2)における電圧降下、vdはスイ
ッチングダイオードαOの順方向立上り電圧を示す。Vi,≦(■.t+Usat”vd)
...""...' (3) In equations (2) and (3), Usat represents the voltage drop in the second constant voltage circuit (2), and vd represents the forward rising voltage of the switching diode αO.
第2の整流電圧Vi、は、前記第2の定電圧回路(2)
の交流減電圧保証限界点(−A%)において。The second rectified voltage Vi is the second constant voltage circuit (2)
At the AC reduced voltage guaranteed limit point (-A%).
Vi、≧(Vox + Usat ) −−
”(4)になるように設定しておく。Vi, ≧(Vox + Usat) --
” (4).
これにより交流定格電圧における第2の定電圧回路(2
)の消費電力Pは
P=υsat X I ・・・・・・
・・・(5)となる。(■は前記第2の定電圧回路(2
)に流れる電流を示す。)
前記構成において、 Vl)、 = 5ポル゛ト、ν、
8t=1.5ボルトとすれば、第2の定電圧回路(2)
への供給電力は6.5XIとなり、該第2の定電圧回路
(2)における消費電力は5XIとなる。This allows the second constant voltage circuit (2
) power consumption P is P=υsat X I...
...(5). (■ is the second constant voltage circuit (2)
) shows the current flowing through. ) In the above configuration, Vl), = 5 ports, ν,
If 8t=1.5 volts, the second constant voltage circuit (2)
The power supplied to the second constant voltage circuit (2) is 6.5XI, and the power consumption in the second constant voltage circuit (2) is 5XI.
従って前記供給電力6.5XIに対し。Therefore, for the said supply power 6.5XI.
1.5XI/6.5XI=0.23
即ち23%の電力が無駄になるのみである・なお第2図
における実施例中、分圧抵抗αη(至)の値R1及びR
1は電位差検出トランジスタ(至)が式(3)を満足す
るときオフになるように設定され、抵抗Q値の値R8は
前記トランジスタ(2)α4(2)のループゲインを犬
になし、前記トランジスタ(至)のオン、オフ動作にヒ
ステリシス特性を持たせると同時に。1.5XI/6.5XI=0.23 That is, only 23% of the power is wasted. In the example shown in FIG.
1 is set so that the potential difference detection transistor (to) is turned off when it satisfies equation (3), and the resistance Q value R8 is set to set the loop gain of the transistor (2) α4 (2) to At the same time, the on/off operation of the transistor has hysteresis characteristics.
前記トランジスタ(至)のスイッチング動作をスピード
アップさせて、該トランジスタ(2)のスイッチング過
渡消費電力を抑制させるように設定しである。It is set to speed up the switching operation of the transistor (2) and suppress the switching transient power consumption of the transistor (2).
これらの値を次に示す。These values are shown below.
R,=4.7にΩ* Rt = l OKΩ、R,=1
80にΩ第3図は、第2図の各部波形を示し、整流回路
(5)の第2の整流出力端子@の電位は交流電源(3)
から樽だ整流出力特有のリップル分を含んでいるので、
交流電圧の低下に伴ない、前記リップル分の下部で電位
差検出トランジスタ(至)がオン、α4がオフとなり1
点人の電位はその瞬間のみv2.まで引上げられ、■。R, = 4.7 to Ω* Rt = l OK Ω, R, = 1
Figure 3 shows the waveforms of each part in Figure 2, and the potential of the second rectified output terminal @ of the rectifier circuit (5) is the same as the AC power supply (3).
Contains ripples peculiar to the rectified output,
As the AC voltage decreases, the potential difference detection transistor (to) is turned on at the bottom of the ripple, α4 is turned off, and 1
The electric potential of the point person is v2 only at that moment. It was raised to ■.
2にリップル分が発生するのを抑制されている。更に交
流電圧が低下すると、vOIにリップル分が現われるが
、 V、、には式(4)を満足する限りリップル分は現
われず、従って電位差検出トランジスタ叫のベース電圧
はV、 (第3図(イ))。2, the occurrence of ripples is suppressed. When the AC voltage further decreases, a ripple component appears in vOI, but no ripple component appears in V, as long as equation (4) is satisfied.Therefore, the base voltage of the potential difference detection transistor is V, (Fig. 3 ( stomach)).
コレクタ電圧Vct (第3図(ロ))に示す様に鋸歯
状波電圧とパルス波形となる。As shown in the collector voltage Vct (FIG. 3(b)), the voltage has a sawtooth waveform and a pulse waveform.
一方電位差検出トランジスタへ4のコレクタ電圧vc!
は、前記電位差検出トランジスタUのコレクタ電圧ve
1の反転した波形(第3図(ハ))となる。On the other hand, the collector voltage VC of 4 to the potential difference detection transistor!
is the collector voltage ve of the potential difference detection transistor U
1 (FIG. 3 (c)).
更に交流電圧が低下すると、スイッチングトランジスタ
(至)の導通角は次第に大きくなり、第1の整流出力端
子(ロ)のリップル分の上端が(■。t + vact
+υd)よりも低くなると、スイッチングトランジスタ
(至)は常時オンとなり、第2の定電圧回路(2)の入
力電圧は常時vL、となり、交流電圧が更に低くなると
、第1の定電圧回路(1)にリップル分が現われるが、
第2の定電圧回路(2)の定電圧出力には式(4)を満
足する限りリップル分は現われない。第3図に)は前記
第2′ア定電圧回路(2)の入力端(黒人)の波形を示
す。第4図は交流電源(3)の交流電圧に対する各定電
圧回路(1)(2)の出力電圧(Vol及び■。、)の
特性、入力電力及び消費電力の特性を示す。When the AC voltage further decreases, the conduction angle of the switching transistor (to) gradually increases, and the upper end of the ripple of the first rectified output terminal (b) becomes (■.t + vact
+υd), the switching transistor (to) is always on, and the input voltage of the second constant voltage circuit (2) is always vL, and when the AC voltage becomes even lower, the input voltage of the first constant voltage circuit (1 ), a ripple component appears, but
No ripple appears in the constant voltage output of the second constant voltage circuit (2) as long as formula (4) is satisfied. FIG. 3) shows the waveform at the input terminal (black) of the 2' constant voltage circuit (2). FIG. 4 shows the characteristics of the output voltages (Vol and 2) of each constant voltage circuit (1) and (2), input power, and power consumption with respect to the AC voltage of the AC power supply (3).
(ト)発明の効果
本発明によれば、複数の定電圧(高低の定電圧)を導出
する定電圧回路を有する電源回路において。(G) Effects of the Invention According to the present invention, a power supply circuit includes a constant voltage circuit that derives a plurality of constant voltages (high and low constant voltages).
従来に比し交流電源の電圧低工時高電圧側の入力端より
低電圧側の入力端に整流出力を供給する構成であり、前
記低電圧側の定電圧回路における消費電力は従来の電源
回路に比し、1/2以下に減少可能となる。又電圧低下
監視の基準電位として定電圧回路の出力電圧を使用して
いるので定電圧回路自身の出力電圧のバラツキによって
電圧低下監視範囲も自動的に補正させるので、極めて安
定した動作が保証できる。The voltage of the AC power supply is lower than that of conventional power supplies.The configuration is such that rectified output is supplied from the input terminal on the high voltage side to the input terminal on the low voltage side, and the power consumption in the constant voltage circuit on the low voltage side is equal to that of the conventional power supply circuit. It can be reduced to 1/2 or less compared to . Furthermore, since the output voltage of the constant voltage circuit is used as the reference potential for voltage drop monitoring, the voltage drop monitoring range is automatically corrected according to variations in the output voltage of the constant voltage circuit itself, so extremely stable operation can be guaranteed.
第1図は本発明の電子機器の電源回路の基本構成図、第
2図は同回路の一実施例を示す回路図。
第3図は第2図における各部波形図、第4図は第2図の
特性図、第5図は従来の同回路の基本構成図を示す。
主な図番の説明
(1)−1,第1の定電圧回路、(2)・・・第2の定
電圧回路、(3)・・・交流電源、 (4)・・・電源
トランス、 (5)・・・整流回路、(6)・・・第1
の定電圧端子、 (7)・・・第2の定電圧端子、(9
)・・・比較器% 顛・・・スイッチングダイオード、
(ロ)・・・第1の整流出力端子。
(2)・・・第2の整流出力端子、 (2)α◆・・・
電位差検出トランジスタ、06・・・スイッチングトラ
ンジスタ。
(2)・・・制御端子。
出願人 三洋電機株式会社 外1名
代理人 弁理士 佐 野 静 夫
□
txi 図
第5図
第2図
1B3図
第4図
(400X)FIG. 1 is a basic configuration diagram of a power supply circuit for an electronic device according to the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the same circuit. 3 shows a waveform diagram of each part in FIG. 2, FIG. 4 shows a characteristic diagram of FIG. 2, and FIG. 5 shows a basic configuration diagram of the conventional circuit. Explanation of main drawing numbers (1)-1, first constant voltage circuit, (2)...second constant voltage circuit, (3)...AC power supply, (4)...power transformer, (5)... Rectifier circuit, (6)... First
constant voltage terminal, (7)...second constant voltage terminal, (9
)...Comparator% 顛...Switching diode,
(b)...First rectified output terminal. (2)...Second rectified output terminal, (2)α◆...
Potential difference detection transistor, 06... switching transistor. (2)...Control terminal. Applicant Sanyo Electric Co., Ltd. and one other representative Patent attorney Shizuo Sano txi Figure 5 Figure 2 Figure 2 1B3 Figure 4 (400X)
Claims (1)
回路の第1の整流出力端子に接続された第1の定電圧回
路及び前記第1の整流出力端子の電圧よりも低い電圧を
有する第2の整流出力端子に接続された第2の定電圧回
路と、前記第1の定電圧回路及び第2の定電圧回路の間
にスイッチング手段を接続すると共に該スイッチング手
段の制御端子に、前記第2の定電圧回路の出力端子が接
続された制御回路の出力側を接続し、前記第1及び第2
の整流出力端子間に逆流阻止用のスイッチングダイオー
ドを接続し、前記第2の定電圧回路の入力端子電圧低下
時前記スイッチング手段をオンになすと共に前記スイッ
チングダイオードをオフにし、前記第2の定電圧回路の
入力端子に前記第1の整流出力端子より整流電圧を供給
することを特徴とした電子機器の電源回路。(1) A rectifier circuit connected to an AC power supply, a first constant voltage circuit connected to a first rectifier output terminal of the first rectifier circuit, and a voltage lower than the voltage of the first rectifier output terminal. A switching means is connected between a second constant voltage circuit connected to a second rectified output terminal having a rectifier output terminal, and the first constant voltage circuit and the second constant voltage circuit, and a switching means is connected to a control terminal of the switching means. , connects the output side of the control circuit connected to the output terminal of the second constant voltage circuit, and connects the output side of the control circuit to which the output terminal of the second constant voltage circuit is connected;
A switching diode for reverse current blocking is connected between the rectifier output terminals of the second constant voltage circuit, and when the voltage at the input terminal of the second constant voltage circuit decreases, the switching means is turned on and the switching diode is turned off. A power supply circuit for electronic equipment, characterized in that a rectified voltage is supplied from the first rectified output terminal to an input terminal of the circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60161359A JPH0827658B2 (en) | 1985-07-22 | 1985-07-22 | Electronic device power supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60161359A JPH0827658B2 (en) | 1985-07-22 | 1985-07-22 | Electronic device power supply circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6222123A true JPS6222123A (en) | 1987-01-30 |
JPH0827658B2 JPH0827658B2 (en) | 1996-03-21 |
Family
ID=15733584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60161359A Expired - Fee Related JPH0827658B2 (en) | 1985-07-22 | 1985-07-22 | Electronic device power supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0827658B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61234411A (en) * | 1985-04-10 | 1986-10-18 | Matsushita Electric Ind Co Ltd | Power supply circuit |
-
1985
- 1985-07-22 JP JP60161359A patent/JPH0827658B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61234411A (en) * | 1985-04-10 | 1986-10-18 | Matsushita Electric Ind Co Ltd | Power supply circuit |
Also Published As
Publication number | Publication date |
---|---|
JPH0827658B2 (en) | 1996-03-21 |
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