JPS59218521A - Power supply circuit - Google Patents
Power supply circuitInfo
- Publication number
- JPS59218521A JPS59218521A JP9235284A JP9235284A JPS59218521A JP S59218521 A JPS59218521 A JP S59218521A JP 9235284 A JP9235284 A JP 9235284A JP 9235284 A JP9235284 A JP 9235284A JP S59218521 A JPS59218521 A JP S59218521A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- positive
- negative
- power supply
- bases
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は正、負、２つの安定化電圧を得ることができる
電源回路に関し、その目的とするところは回路構成を簡
略化すると共に電源投入時の立上り特性の向上と安定化
電圧の選択の自由度を大きくすることにある。[Detailed Description of the Invention] The present invention relates to a power supply circuit that can obtain two stabilized voltages, positive and negative, and its purpose is to simplify the circuit configuration and improve the startup characteristics when the power is turned on. The objective is to increase the degree of freedom in selecting the stabilizing voltage.
従来におけるこの種の電源回路は第１図に示すように構
成されていた。すなわち、交流電源ｔＣが一次側に印加
される電源トランス１の二次側に整流用ダイオード２〜
５で構成された整流回路６が接続され、この整流回路６
の正の出力端６ａと電のトランス１の中間タップいわゆ
る接地線１ａとの間には平滑コンデンサ７、並ひに抵抗
８、ツェナタイオード９、トランジスタ１０とでなる正
の電圧安定化回路が接続されている。寸だ整流回路６の
負の出力端６ｂと上記接地線１ａとの間には平滑コンデ
ンサ１１、並ひに抵抗１２、ツェナーダイオード１３、
トランジスタ１４とでなる負の電圧安定化回路が接続さ
れている。そして出力端子１５とアース端子１６との間
に正の安定化電圧が、また出力端子１７とアース端子１
６との間に負の安定化電圧が得られるようになっている
。A conventional power supply circuit of this type was constructed as shown in FIG. That is, the rectifying diodes 2 to 2 are connected to the secondary side of the power transformer 1 to which the AC power supply tC is applied to the primary side.
5 is connected to the rectifier circuit 6.
A positive voltage stabilizing circuit consisting of a smoothing capacitor 7, a resistor 8, a Zener diode 9, and a transistor 10 is connected between the positive output terminal 6a of the transformer 1 and the so-called grounding wire 1a of the electric transformer 1. It is connected. A smoothing capacitor 11, a resistor 12, a Zener diode 13,
A negative voltage stabilizing circuit consisting of transistor 14 is connected. A positive stabilizing voltage is then applied between the output terminal 15 and the ground terminal 16, and between the output terminal 17 and the ground terminal 1.
6, a negative stabilizing voltage can be obtained between the two.
しかしながら、この種の電源回路によれは、次のような
欠点があるものであ−た。すなわち、まず第１に高価な
ツェナーダイオードを２個必要とすること、第２に電源
投入時のトランジスタ１０゜１４のベース電圧は各々の
トランジスタの直流電流増幅率に大きく影響されるため
正および負の電土の立上りのバランスがくずれ易いこと
、第３に安定化出力電圧がツェナー電圧でほぼ一儀的に
決定されるために自由な出力電圧を得ようとすれば特殊
なツェナーダイオードを必要とする等の欠点を持ってい
るものであった。However, this type of power supply circuit has the following drawbacks. Firstly, two expensive Zener diodes are required, and secondly, the base voltage of the transistors 10 and 14 when the power is turned on is greatly affected by the DC current amplification factor of each transistor, so the positive and negative Thirdly, the stabilized output voltage is almost exclusively determined by the Zener voltage, so if you want to obtain a free output voltage, you need a special Zener diode. It had some drawbacks, such as:
本発明はこのような従来の欠点を解消するもので、以下
にその一実施例について第２図以降の図面と共に説明す
る。なお第２図において第１図と同一構成部分には同一
番号を付して詳細な説明を省略する。第１図と異なる部
分を中心に説明すると、第１図の２つのツェナーダイオ
ード９，１３が廃止され、これに代わる１つのツェナー
ダイオード１８がそのカソードをトランジスタ１０のベ
ース側、アノードをトランジスタ１４０ベース側にして
」二記２つのトランジスタ１０．１４のベース間に接続
されている。まだ上記トランジスタ１０のベースとアー
ス端子１６間、並びにトランジスタ１４のベースとアー
ス端子１６間にはそれぞれ抵抗１９．２０が接続されて
いる。The present invention is intended to eliminate such conventional drawbacks, and one embodiment thereof will be described below with reference to FIG. 2 and subsequent drawings. In FIG. 2, the same components as those in FIG. 1 are given the same numbers and detailed explanations are omitted. Focusing on the parts that are different from FIG. 1, the two Zener diodes 9 and 13 in FIG. 1 are eliminated, and one Zener diode 18 replaces them, with its cathode connected to the base side of the transistor 10 and its anode connected to the base side of the transistor 140. It is connected between the bases of two transistors 10.14 on both sides. Resistors 19 and 20 are still connected between the base of the transistor 10 and the ground terminal 16 and between the base of the transistor 14 and the ground terminal 16, respectively.
上記実施例において次にその動作を説明する。The operation of the above embodiment will now be explained.
交流電源は整流用ダイオード２へ・６でブリソノ整流さ
れて非安定直流電源に変換され、該直流電源の正電圧は
平滑コンデンサ７で平滑され、トランジスタ１０のコレ
クタに供給される。捷だ負電圧ハ平滑コンデンサ１１で
平滑されてトランジスタ１４のコレクタに供給される。The AC power source is Brisono rectified by rectifying diodes 2 and 6 and converted into an unstable DC power source, and the positive voltage of the DC power source is smoothed by a smoothing capacitor 7 and supplied to the collector of a transistor 10. The resulting negative voltage is smoothed by a smoothing capacitor 11 and supplied to the collector of a transistor 14.
そして正の安定化出力はトランジスタ１ｏのエミッタか
ら得、負の安定化出力はトランジスタ１４のエミッタか
ら得ている。A positive stabilized output is obtained from the emitter of transistor 1o, and a negative stabilized output is obtained from the emitter of transistor 14.
すなわち、トランジスタ１０のベースにアノードを接続
しトランジスタ１４のベースにカソードを接続したツェ
ナーダイオード１８のツェナー電圧で正電圧と負電圧と
の差を決定し、そのシェナー電圧を抵抗１９と抵抗２０
とで分圧してその接続点を接地することによりトランジ
スタ１０．１４のベース電圧を安定化して正」？よび負
の安定出力を得ている。That is, the difference between the positive voltage and the negative voltage is determined by the Zener voltage of the Zener diode 18 whose anode is connected to the base of the transistor 10 and the cathode is connected to the base of the transistor 14, and the Zener voltage is applied to the resistor 19 and the resistor 20.
By dividing the voltage between and grounding the connection point, the base voltage of transistor 10.14 is stabilized and becomes positive. and a stable negative output.
このように本実施例の電源回路は高価なツェナーダイオ
ードを１つ用いるだけで構成できることによるコストダ
ウン、また電源投入時におけるトランジスタ１０，１４
のベース電圧は正電圧が抵抗８と１９の分圧比で、負電
圧が抵抗１２と２０の分圧比で決まる高圧の安定化出力
端子１６および負の安定化出力端子１７の電圧はバラツ
キの大きいトランジスタの直流電流増幅率に影響されず
に上記抵抗の比でバランスよく立上る特性が得られる。In this way, the power supply circuit of this embodiment can be constructed using only one expensive Zener diode, which reduces costs, and reduces the cost of transistors 10 and 14 when the power is turned on.
The base voltage of the high-voltage stabilized output terminal 16 and the negative stabilized output terminal 17 are determined by the voltage division ratio of the resistors 8 and 19, and the negative voltage is determined by the voltage division ratio of the resistors 12 and 20. A well-balanced rise characteristic can be obtained with the above resistance ratio without being influenced by the DC current amplification factor.
また安定化出力電圧はツェナー電圧を抵抗分割して得て
いる。ため比較的多種類な値の選べる抵抗の値を任意に
変えることによって自由に希望の電圧を得ることが可能
となる。Further, the stabilized output voltage is obtained by dividing the Zener voltage by resistance. Therefore, it is possible to freely obtain a desired voltage by arbitrarily changing the value of the resistor, which can be selected from a relatively wide variety of values.
以上説明したように本発明の電源回路によれば、定電圧
ダイオードを１個用いるだけで正、負の安定化出力電圧
を得ることができ、しかもその出力電圧の値も比較的自
由に変えることができ、コスト的にも性能的にも優れた
電源回路を提供することができる。As explained above, according to the power supply circuit of the present invention, positive and negative stabilized output voltages can be obtained by using only one voltage regulator diode, and the value of the output voltage can also be changed relatively freely. This makes it possible to provide a power supply circuit that is superior in terms of cost and performance.
第１図は従来の電源回路を示す回路図、第２図は本発明
の一実施例における電源回路を示す回路図である。
６・・・・・・整流回路、１０．１４・・・・・トラン
ジスタ、１５・・・・・・正の出力端子、１６ ・・・
アース端子、１７・・・・・・負の出力端子、１８・・
・・−・ツェナーダイオード、１９．２０・・・・・・
抵抗。FIG. 1 is a circuit diagram showing a conventional power supply circuit, and FIG. 2 is a circuit diagram showing a power supply circuit according to an embodiment of the present invention. 6... Rectifier circuit, 10.14... Transistor, 15... Positive output terminal, 16...
Earth terminal, 17... Negative output terminal, 18...
...Zener diode, 19.20...
resistance.
Claims (1)
を含む電圧安定化回路を接続し、上記トランジスタを介
して正、負の安定化電圧を得るように構成した電源回路
であって、上記正、負の電圧安定化回路を構成する第１
．第２のトランジスタのベース間に定電圧ダイオードを
接続し、かつ上記第１．第２のトランジスタのベースと
接地間にそれぞれ抵抗を接続してなる電源回路。A voltage stabilizing circuit including a transistor is connected to two positive and negative output terminals of a rectifier circuit, respectively, and the power supply circuit is configured to obtain positive and negative stabilized voltages via the transistor, the power supply circuit comprising: The first component constituting the negative voltage stabilization circuit
．． A constant voltage diode is connected between the bases of the second transistor, and the first. A power supply circuit in which a resistor is connected between the base of the second transistor and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9235284A JPS59218521A (en) | 1984-05-09 | 1984-05-09 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9235284A JPS59218521A (en) | 1984-05-09 | 1984-05-09 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59218521A true JPS59218521A (en) | 1984-12-08 |
Family
ID=14052006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9235284A Pending JPS59218521A (en) | 1984-05-09 | 1984-05-09 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59218521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100681641B1 (en) | 2005-06-02 | 2007-02-09 | 주식회사 대우일렉트로닉스 | Apparatus for variability voltage an smps |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4925443A (en) * | 1972-06-30 | 1974-03-06 |
-
1984
- 1984-05-09 JP JP9235284A patent/JPS59218521A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4925443A (en) * | 1972-06-30 | 1974-03-06 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100681641B1 (en) | 2005-06-02 | 2007-02-09 | 주식회사 대우일렉트로닉스 | Apparatus for variability voltage an smps |
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