JPH05252745A - Voltage doubler rectifying circuit - Google Patents
Voltage doubler rectifying circuitInfo
- Publication number
- JPH05252745A JPH05252745A JP4499892A JP4499892A JPH05252745A JP H05252745 A JPH05252745 A JP H05252745A JP 4499892 A JP4499892 A JP 4499892A JP 4499892 A JP4499892 A JP 4499892A JP H05252745 A JPH05252745 A JP H05252745A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electrolytic capacitor
- capacitor
- diode
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電解コンデンサを用
いた半波倍電圧整流回路、ことに電解コンデンサの信頼
性を向上した倍電圧整流回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a half-wave voltage doubler rectifier circuit using an electrolytic capacitor, and more particularly to a voltage doubler rectifier circuit with improved reliability of the electrolytic capacitor.
【０００２】[0002]
【従来の技術】図３は従来の半波倍電圧整流回路を示す
接続図である。図において、半波倍電圧整流回路は、電
源スイッチ９を有する交流電源１０に、図中矢印で示す
充電電流ｉ1 を通流方向とするダイオ−ド２と第１のコ
ンデンサ１との直列回路を接続し、さらにダイオ−ド２
に並列に図中矢印で示す充電電流ｉ2 を通流方向とする
ダイオ−ド３と第２のコンデンサ４との直列回路を接続
することにより構成され、第２のコンデンサ４に並列に
外部負荷回路１１が接続される。2. Description of the Related Art FIG. 3 is a connection diagram showing a conventional half-wave voltage doubler rectifier circuit. In the figure, a half-wave voltage doubler rectifier circuit is a series circuit of a diode 2 and a first capacitor 1 in which a charging current i 1 indicated by an arrow in the drawing flows in an AC power source 10 having a power switch 9. , And then the diode 2
Is connected in parallel with a series circuit of a diode 3 and a second capacitor 4 having a charging current i 2 flowing in the direction shown by the arrow in the figure, and an external load is connected in parallel with the second capacitor 4. The circuit 11 is connected.
【０００３】図４は従来の半波倍電圧整流回路の電源ス
イッチ投入時における動作を示すタイムチャ−トであ
り、交流電源１０の電圧をｖ＝ｖm sin ωｔとし、負荷
電流ｉ l が流し得る充電電流ｉ1,ｉ2 に比べて著しく小
さいものと仮定する。図において、交流電源電圧ｖの負
の半サイクルの立ち下がり時点ｔ1 で電源スイッチ９が
オンしたと仮定すると、ダイオ−ド２が導通状態となっ
て第１のコンデンサ１に充電電流ｉ1 が矢印方向に流
れ、第１のコンデンサ１は図中矢印を正方向とする充電
電圧＋ｖm （交流電源電圧の波高値ｖm に相当）に充電
される。次いで、ｔ 2 時点で交流電源電圧が正の半サイ
クルに変化するとダイオ−ド２に代わってダイオ−ド３
が導通状態となって充電電流ｉ2 が流れ、第２のコンデ
ンサは第１のコンデンサの充電電圧＋ｖm と交流電源電
圧の正の半サイクル電圧との和に相当する充電電圧で充
電され、図中矢印で示す方向を正方向とする最大＋２ｖ
m を負荷１１に供給することができる。FIG. 4 shows a power supply switch of a conventional half-wave voltage doubler rectifier circuit.
It is a time chart showing the operation when the switch is turned on.
The voltage of the AC power supply 10 by v = vm sinωt, load
Current i lCharging current i1,i2Remarkably smaller than
Assume that it is good. In the figure, the negative of the AC power supply voltage v
Half-cycle fall time t1And the power switch 9
Assuming that it is turned on, diode 2 becomes conductive.
Charging current i to the first capacitor 11Flows in the direction of the arrow
Then, the first capacitor 1 is charged with the arrow in the figure as the positive direction.
Voltage + vm(Peak value v of AC power supply voltagemEquivalent to)
To be done. Then t 2AC power supply voltage is positive at half point
When it changes to Kuru, it is replaced with diode 2 and diode 3
Becomes conductive and charging current i2Flows, the second conde
Is the charging voltage of the first capacitor + vmAnd AC power supply
Charging voltage equal to the positive half-cycle voltage
+ 2v at maximum with the positive direction being the direction indicated by the arrow in the figure
mCan be supplied to the load 11.
【０００４】ところで、上述の半波倍電圧整流回路で
は、第１のコンデンサ１が回路に直列に接続されている
ため、負荷電流ｉl が大きくなると第２のコンデンサ４
の出力電圧が大幅に低下するため、これを防ぐため第１
のコンデンサ１の静電容量をなるべく大きくすることが
必要になる。しかしながら、第１のコンデンサを大容量
化することによって生ずる倍電圧整流回路の大型化を防
ぐことも必要であり、ことに交流電源１０が例えば商用
周波数の低周波電源である場合第１のコンデンサの小型
化が必要になる。そこで、同一体積のフィルムコンデン
サなどの無極性コンデンサに比べ、有極性ではあるが著
しく大きな静電容量を容易に得られる電解コンデンサを
第１のコンデンサに使用することにより、小型で出力電
流の大きい半波倍電圧整流回路を構成したものが知られ
ている。By the way, in the above-mentioned half-wave voltage doubler rectifier circuit, the first capacitor 1 is connected in series to the circuit. Therefore, when the load current i l increases, the second capacitor 4
Output voltage drops significantly, so to prevent this
It is necessary to increase the electrostatic capacitance of the capacitor 1 as much as possible. However, it is also necessary to prevent the voltage doubler rectifier circuit from increasing in size caused by increasing the capacity of the first capacitor, especially when the AC power source 10 is a low frequency power source of commercial frequency, for example. Miniaturization is required. Therefore, compared with non-polar capacitors such as film capacitors of the same volume, by using an electrolytic capacitor that is polar and can easily obtain a remarkably large electrostatic capacity as the first capacitor, it is possible to reduce the size and increase the output current. A wave doubler voltage rectifying circuit is known.
【０００５】[0005]
【発明が解決しようとする課題】電解コンデンサは周知
のように、アルミニウム，タンタル等の金属テ−プを陰
極，一方の面に電解酸化処理により酸化皮膜（化成皮
膜）を形成した金属テ−プを陽極として、両者の間に電
解液含浸層を挟んだ構造となっている。また、電解コン
デンサには極性があり、陽極が正電位（＋）となるよう
充電することにより酸化皮膜が電気的絶縁層（誘電体）
として機能して電荷を蓄積できるが、陽極が負電位
（−）となるような逆電圧を印加すると酸化皮膜が誘電
体として機能せず、電荷を蓄積できないばかりか、酸化
皮膜が徐々に損傷し、ついには順方向の電圧にも耐えな
い破損状態に進展する。As is well known, an electrolytic capacitor is a metal tape having a metal tape of aluminum, tantalum or the like as a cathode and an oxide film (chemical conversion film) formed on one surface by electrolytic oxidation treatment. Is used as an anode, and an electrolytic solution impregnated layer is sandwiched between the two. Also, the electrolytic capacitor has polarity, and the oxide film is electrically insulating layer (dielectric) by charging the anode to a positive potential (+).
However, when a reverse voltage is applied so that the anode has a negative potential (-), the oxide film does not function as a dielectric and cannot store charges, and the oxide film gradually becomes damaged. Finally, it develops into a damage state that cannot withstand the forward voltage.
【０００６】ところで、第１のコンデンサ１に電解コン
デンサを用いた場合、電源スイッチ９が図４に示す交流
電源電圧ｖの正の半サイクルのピ−ク値に相当するｔ0
時点で投入されたと仮定する。この時、ダイオ−ド２が
オフ，ダイオ−ド３がオン状態となり、第１のコンデン
サ１としての電解コンデンサはその陰極側に交流電源電
圧の正の半サイクルを受けて−ｖm に逆充電されるとい
う不都合が発生する。逆充電される時間が短いのと、電
解コンデンサにある程度の自己回復性があることによ
り、電解コンデンサが直ちに破損することはないが、こ
のような状態が繰り返されることにより電解コンデンサ
の性能が徐々に低下するため、半波倍電圧整流回路の信
頼性に悪影響を及ぼすという問題が生ずる。[0006] When using the first electrolytic capacitor in the capacitor 1, the power switch 9 is positive half cycle peak of the AC power supply voltage v shown in FIG. 4 - t 0 corresponding to the click value
It is assumed that it was input at the time. At this time, the diode - de 2 is turned off, diode - de 3 is turned on, the first electrolytic capacitor as a capacitor 1 reverse charged -v m receives the positive half cycle of the AC power supply voltage to the cathode side This causes the inconvenience. Although the reverse charging time is short and the electrolytic capacitor has some self-healing property, the electrolytic capacitor will not be damaged immediately, but by repeating such a state, the performance of the electrolytic capacitor will gradually increase. As a result, the reliability of the half-wave voltage doubler rectifier circuit is adversely affected.
【０００７】この発明の目的は、電源スイッチの投入時
に電解コンデンサに逆電圧が印加されることを防ぐこと
により、小型で信頼性の高い倍電圧整流回路を得ること
にある。An object of the present invention is to obtain a compact and highly reliable voltage doubler rectifier circuit by preventing a reverse voltage from being applied to the electrolytic capacitor when the power switch is turned on.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に、この発明によれば、交流電源電圧の負の半サイクル
で充電される第１のコンデンサと、交流電源電圧の正の
半サイクルで２倍電圧充電される第２のコンデンサとを
含む半波倍電圧整流回路において、第１のコンデンサが
交流電源側に陰極が接続された電解コンデンサからな
り、この電解コンデンサが、電源スイッチを前記交流電
源電圧の正の半サイクルで投入した時前記電解コンデン
サに加わる逆方向電圧を低減する保護回路を備えてなる
ものとする。In order to solve the above problems, according to the present invention, a first capacitor charged in a negative half cycle of an AC power supply voltage and a positive half cycle of an AC power supply voltage are used. In a half-wave voltage doubler rectifier circuit including a second capacitor charged with a double voltage, the first capacitor is an electrolytic capacitor whose cathode is connected to the AC power source side, and the electrolytic capacitor switches the power switch to the AC voltage. A protection circuit for reducing the reverse voltage applied to the electrolytic capacitor when the power supply voltage is turned on in a positive half cycle is provided.
【０００９】また、保護回路が電解コンデンサに並列接
続されたダイオ−ドからなるものとする。さらに、電解
コンデンサの陰極にダイオ−ドの陽極が接続されてなる
ものとする。The protection circuit is composed of a diode connected in parallel with the electrolytic capacitor. Further, the cathode of the electrolytic capacitor is connected to the anode of the diode.
【００１０】[0010]
【作用】この発明の構成において、交流電源電圧の負の
半サイクルで充電される第１のコンデンサと、交流電源
電圧の正の半サイクルで２倍電圧充電される第２のコン
デンサとを含む半波倍電圧整流回路において、第１のコ
ンデンサを交流電源側に陰極が接続された電解コンデン
サとし、この電解コンデンサが電源スイッチを交流電源
電圧の正の半サイクルで投入した時電解コンデンサに加
わる逆方向電圧を低減する保護回路、例えば電解コンデ
ンサに並列接続されたダイオ−ドを備え、かつこのダイ
オ−ドの陽極を電解コンデンサの陰極に接続するよう構
成したことにより、電源スイッチが交流電源電圧の正の
半サイクルで投入されて電解コンデンサの陰極に逆電圧
が印加されると、保護回路としてのダイオ−ドが導通
し、これに並列接続された電解コンデンサに加わる逆電
圧をダイオ−ドの順方向電圧に相当する低電圧に抑制す
るので、電解コンデンサへの悪影響は回避され、したが
って第１のコンデンサに電解コンデンサを用いることに
より小型化された半波倍電圧整流回路の信頼性を向上す
る機能が得られる。In the structure of the present invention, a half capacitor including the first capacitor charged in the negative half cycle of the AC power supply voltage and the second capacitor charged in double voltage in the positive half cycle of the AC power supply voltage. In the wave voltage doubler rectifier circuit, the first capacitor is an electrolytic capacitor whose cathode is connected to the AC power supply side, and this electrolytic capacitor is applied in the reverse direction when the power switch is turned on in the positive half cycle of the AC power supply voltage. By providing a protection circuit for reducing the voltage, for example, a diode connected in parallel with an electrolytic capacitor, and connecting the anode of this diode to the cathode of the electrolytic capacitor, the power switch has a positive AC power supply voltage. , And the reverse voltage is applied to the cathode of the electrolytic capacitor, the diode as a protection circuit conducts and is connected in parallel. Since the reverse voltage applied to the electrolytic capacitor is suppressed to a low voltage corresponding to the forward voltage of the diode, adverse effects on the electrolytic capacitor are avoided, and therefore the size is reduced by using the electrolytic capacitor for the first capacitor. The function of improving the reliability of the half-wave voltage doubler rectifier circuit can be obtained.
【００１１】[0011]
【実施例】以下、この発明を実施例に基づいて説明す
る。図１はこの発明の実施例になる半波倍電圧整流回路
を示す接続図、図２は実施例になる半波倍電圧整流回路
の電源スイッチ投入時の動作を示すタイムチャ−トであ
り、従来技術と同じ構成部分には同一参照符号を付すこ
とにより、重複した説明を省略する。図において、第１
のコンデンサ１には電解コンデンサが用いられ、その陰
極Ｃが電源スイッチ９を介して交流電源１０に接続され
る。また、電解コンデンサに並列接続された保護回路１
１にはダイオ−ドが用いられ、そのアノ−ドが電解コン
デンサの陰極Ｃに，そのカソ−ドが電解コンデンサの陽
極Ａに接続される。EXAMPLES The present invention will be described below based on examples. FIG. 1 is a connection diagram showing a half-wave voltage doubler rectifier circuit according to an embodiment of the present invention, and FIG. 2 is a time chart showing the operation of the half-wave voltage doubler rectifier circuit according to the embodiment when the power switch is turned on. The same components as those in the technology are designated by the same reference numerals, and the duplicate description will be omitted. In the figure, the first
An electrolytic capacitor is used as the capacitor 1, and its cathode C is connected to an AC power source 10 via a power switch 9. In addition, a protection circuit 1 connected in parallel with the electrolytic capacitor
A diode is used for 1, and its anode is connected to the cathode C of the electrolytic capacitor and its cathode to the anode A of the electrolytic capacitor.
【００１２】このように構成された保護回路を有する半
波倍電圧整流回路において、電源スイッチ９が交流電源
電圧ｖの正の半サイクルのピ−ク値にあたるｔ0 時点で
投入されたと仮定すると、保護回路のダイオ−ド１１お
よびダイオ−ド３が導通状態となって第２のコンデンサ
４に充電電流が流れる。この時、電解コンデンサ１は正
の交流電源電圧に対し、導通した保護回路のダイオ−ド
１１によって短絡された状態となるので、電解コンデン
サ１に加わる逆電圧はダイオ−ド１１の順方向電圧に相
当する−ＶF に抑制されることになり、電解コンデンサ
１に交流電源電圧の波高値ｖm に相当する高い逆電圧が
印加されることによって生ずる電解コンデンサの損傷を
ほぼ完全に回避することができる。また、第１のコンデ
ンサ１に電解コンデンサを用いることにより、コンデン
サを大型化することなくその静電容量を増大できるの
で、負荷電流ｉl に対する電圧降下の少なく、信頼性の
高い半波倍電圧整流回路を提供できる利点が得られる。In the half-wave voltage doubler rectifier circuit having the protection circuit configured as described above, assuming that the power switch 9 is turned on at time t 0 corresponding to the peak value of the positive half cycle of the AC power supply voltage v, The diode 11 and the diode 3 of the protection circuit become conductive, and a charging current flows through the second capacitor 4. At this time, the electrolytic capacitor 1 is short-circuited to the positive AC power supply voltage by the diode 11 of the protection circuit which is conductive, so that the reverse voltage applied to the electrolytic capacitor 1 becomes the forward voltage of the diode 11. It is suppressed to a corresponding −V F, and it is possible to almost completely avoid damage to the electrolytic capacitor caused by applying a high reverse voltage corresponding to the peak value v m of the AC power supply voltage to the electrolytic capacitor 1. it can. Further, by using an electrolytic capacitor as the first capacitor 1, the capacitance thereof can be increased without increasing the size of the capacitor, so that the voltage drop with respect to the load current i l is small and the half-wave voltage doubler rectification is highly reliable. The advantage is that a circuit can be provided.
【００１３】[0013]
【発明の効果】この発明は前述のように、交流電源電圧
の負の半サイクルで充電される第１のコンデンサと、交
流電源電圧の正の半サイクルで２倍電圧充電される第２
のコンデンサとを含む半波倍電圧整流回路において、第
１のコンデンサを交流電源側に陰極が接続された電解コ
ンデンサとし、この電解コンデンサが電源スイッチを交
流電源電圧の正の半サイクルで投入した時電解コンデン
サに加わる逆方向電圧を低減する保護回路、例えば電解
コンデンサに並列接続されたダイオ−ドを備え、かつこ
のダイオ−ドの陽極を電解コンデンサの陰極に接続する
よう構成した。そき結果、電源スイッチが交流電源電圧
の正の半サイクルで投入されて電解コンデンサの陰極に
逆電圧が印加されると、保護回路としてのダイオ−ドが
導通し、これに並列接続された電解コンデンサに加わる
逆電圧をダイオ−ドの順方向電圧に相当する低い電圧に
抑制するので、従来の倍電圧整流回路で問題となった電
解コンデンサへの悪影響は回避され、したがって第１の
コンデンサに電解コンデンサを用いることにより小型化
されるとともに電圧が安定し、保護回路によって信頼性
が向上した半波倍電圧整流回路を提供することができ
る。As described above, according to the present invention, the first capacitor charged in the negative half cycle of the AC power supply voltage and the second capacitor charged in the positive half cycle of the AC power supply voltage are doubled.
In the half-wave voltage doubler rectifier circuit including the capacitor, the first capacitor is an electrolytic capacitor whose cathode is connected to the AC power supply side, and when this electrolytic capacitor turns on the power switch in a positive half cycle of the AC power supply voltage. A protection circuit for reducing the reverse voltage applied to the electrolytic capacitor, for example, a diode connected in parallel with the electrolytic capacitor is provided, and the anode of this diode is connected to the cathode of the electrolytic capacitor. As a result, when the power switch is turned on in the positive half cycle of the AC power supply voltage and a reverse voltage is applied to the cathode of the electrolytic capacitor, the diode as the protection circuit conducts, and the electrolytic capacitor connected in parallel to this diode. Since the reverse voltage applied to the capacitor is suppressed to a low voltage corresponding to the forward voltage of the diode, the adverse effect on the electrolytic capacitor, which has been a problem in the conventional voltage doubler rectifier circuit, is avoided, and therefore the first capacitor is electrolytically charged. By using the capacitor, it is possible to provide a half-wave voltage doubler rectifier circuit that is miniaturized, the voltage is stable, and the protection circuit improves reliability.
【図１】この発明の実施例になる半波倍電圧整流回路を
示す接続図FIG. 1 is a connection diagram showing a half-wave voltage doubler rectifier circuit according to an embodiment of the present invention.
【図２】実施例になる半波倍電圧整流回路の電源スイッ
チ投入時の動作を示すタイムチャ−トFIG. 2 is a time chart showing the operation of the half-wave voltage doubler rectifier circuit according to the embodiment when the power switch is turned on.
【図３】従来の半波倍電圧整流回路を示す接続図FIG. 3 is a connection diagram showing a conventional half-wave voltage doubler rectifier circuit.
【図４】従来の半波倍電圧整流回路の電源スイッチ投入
時における動作を示すタイムチャ−トFIG. 4 is a time chart showing the operation of the conventional half-wave voltage doubler rectifier circuit when the power switch is turned on.
１ 第１のコンデンサ（電解コンデンサ） ２ ダイオ−ド ３ ダイオ−ド ４ 第２のコンデンサ ９ 電源スイッチ １０ 交流電源 １１ 保護回路（ダイオ−ド） ＋ｖm 第１のコンデンサの充電電圧 ＋２ｖm 第２のコンデンサの充電電圧 −ｖm 第１のコンデンサに加わる逆電圧（従来） −ＶF 第１のコンデンサの低減された逆電圧（実施
例）1 the first capacitor (electrolytic capacitor) 2 diode - de 3 diode - de 4 second capacitor 9 Power switch 10 AC power source 11 protective circuit (diode - de) + v m charge voltage + 2v m second of the first capacitor charging voltage -v m reverse voltage applied to the first capacitor of the capacitor (conventional) -V F reduced reverse voltage of the first capacitor (example)
Claims (3)
る第１のコンデンサと、交流電源電圧の正の半サイクル
で２倍電圧充電される第２のコンデンサとを含む半波倍
電圧整流回路において、第１のコンデンサが交流電源側
に陰極が接続された電解コンデンサからなり、この電解
コンデンサが、電源スイッチを前記交流電源電圧の正の
半サイクルで投入した時前記電解コンデンサに加わる逆
方向電圧を低減する保護回路を備えてなることを特徴と
する倍電圧整流回路。1. A half-wave voltage doubler rectifier including a first capacitor charged in a negative half cycle of an AC power supply voltage and a second capacitor charged in a negative half cycle of an AC power supply voltage by a double voltage. In the circuit, the first capacitor comprises an electrolytic capacitor having a cathode connected to the AC power supply side, and this electrolytic capacitor applies a reverse direction to the electrolytic capacitor when the power switch is turned on at a positive half cycle of the AC power supply voltage. A voltage doubler rectifier circuit comprising a protection circuit for reducing voltage.
たダイオ−ドからなることを特徴とする請求項１記載の
倍電圧整流回路。2. The voltage doubler rectifier circuit according to claim 1, wherein the protection circuit comprises a diode connected in parallel with the electrolytic capacitor.
側が接続されてなることを特徴とする請求項２記載の倍
電圧整流回路。3. The voltage doubler rectifier circuit according to claim 2, wherein the cathode of the electrolytic capacitor is connected to the anode side of the diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4499892A JPH05252745A (en) | 1992-03-03 | 1992-03-03 | Voltage doubler rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4499892A JPH05252745A (en) | 1992-03-03 | 1992-03-03 | Voltage doubler rectifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05252745A true JPH05252745A (en) | 1993-09-28 |
Family
ID=12707097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4499892A Pending JPH05252745A (en) | 1992-03-03 | 1992-03-03 | Voltage doubler rectifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05252745A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411615A2 (en) * | 2002-10-18 | 2004-04-21 | Shimano Inc. | Charging apparatus of bicycle dynamo |
| JP2006228233A (en) * | 2005-02-18 | 2006-08-31 | Samsung Electronics Co Ltd | Rectifier and tag for radio-frequency identification |
| JP2007020369A (en) * | 2005-07-11 | 2007-01-25 | Omron Corp | Power supply device with voltage doubler rectifying/smoothing circuit |
-
1992
- 1992-03-03 JP JP4499892A patent/JPH05252745A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411615A2 (en) * | 2002-10-18 | 2004-04-21 | Shimano Inc. | Charging apparatus of bicycle dynamo |
| US6940258B2 (en) | 2002-10-18 | 2005-09-06 | Shimano Inc. | Charging apparatus of bicycle dynamo |
| EP1411615A3 (en) * | 2002-10-18 | 2006-06-14 | Shimano Inc. | Charging apparatus of bicycle dynamo |
| JP2006228233A (en) * | 2005-02-18 | 2006-08-31 | Samsung Electronics Co Ltd | Rectifier and tag for radio-frequency identification |
| JP4589883B2 (en) * | 2005-02-18 | 2010-12-01 | 三星電子株式会社 | Rectifier and tag for wireless authentication |
| JP2007020369A (en) * | 2005-07-11 | 2007-01-25 | Omron Corp | Power supply device with voltage doubler rectifying/smoothing circuit |
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