JPH0363807A - Power source circuit - Google Patents

Power source circuit

Info

Publication number
JPH0363807A
JPH0363807A JP20073689A JP20073689A JPH0363807A JP H0363807 A JPH0363807 A JP H0363807A JP 20073689 A JP20073689 A JP 20073689A JP 20073689 A JP20073689 A JP 20073689A JP H0363807 A JPH0363807 A JP H0363807A
Authority
JP
Japan
Prior art keywords
circuit
regulator circuit
regulator
series
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.)
Pending
Application number
JP20073689A
Other languages
Japanese (ja)
Inventor
Toshiki Yamabe
山辺　俊樹
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP20073689A priority Critical patent/JPH0363807A/en
Publication of JPH0363807A publication Critical patent/JPH0363807A/en
Pending legal-status Critical Current

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  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To keep the loss of a regulator circuit constant by connecting the regulator circuit of switching system and the regulator circuit of series system in series, and providing a control circuit to control the output voltages of both regulator circuits simultaneously. CONSTITUTION:A rectified voltage 6 outputting from a rectifier circuit 1 is added on the regulator circuit 3 of switching system, and the output voltage of the circuit 3 is a DC voltage accompanying by a small switching noise, which becomes the input voltage of the regulator circuit 2 of series system. The output voltage 7 of the regulator circuit 2 goes to the DC voltage without having a noise component. The control circuit 4 receives a certain signal from a load 5, and performs control so as to increase the output voltages of the regulator circuits 2 and 3 when the output voltage of the series regulator circuit 3 is increased, and to decrease also the output voltage of the switching regulator circuit 3 when the output voltage of the regulator circuit 2 is decreased. In such a way, it is possible to keep the loss of the series regulator circuit 2 constant.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、例えばテレビジラン受像機などの出力電圧
が可変する電源回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply circuit whose output voltage is variable, such as for a television receiver.

〔従来の技術〕[Conventional technology]

第２図及び第３図は従来の電源回路を示すブロック図で
、両図において、１は交流電圧を整流する整流回路、２
はシリーズ方式のレギュレータ回路、３はスイッチング
方式のレギュレータ回路、４はレギュレータ回路２，３
の出力電圧を可変させるための制御回路、５は負荷１．
６は整流回路１から出力されるリップル分を伴う整流電
圧、７は各レギュレータ２．３の出力電圧である。2 and 3 are block diagrams showing conventional power supply circuits. In both figures, 1 is a rectifier circuit that rectifies AC voltage, 2
is a series type regulator circuit, 3 is a switching type regulator circuit, 4 is a regulator circuit 2, 3
5 is a control circuit for varying the output voltage of the load 1.
6 is a rectified voltage with ripple output from the rectifier circuit 1, and 7 is an output voltage of each regulator 2.3.

従来の電源回路は整流回路１から出力される整流電圧６
を第２図ではシリーズレギュレータ回路２を、第３図で
はスイッチングレギュレータ回路３を用いて出力電圧と
し、負荷５に供給する。また、負荷５から何らかの信号
を制御回路４に与え、これをもとに制御回路４が各レギ
ュレータ回路２゜３の出力電圧を制御している。A conventional power supply circuit uses a rectified voltage 6 output from a rectifier circuit 1.
is made into an output voltage using the series regulator circuit 2 in FIG. 2 and the switching regulator circuit 3 in FIG. 3, and is supplied to the load 5. Further, some kind of signal is given from the load 5 to the control circuit 4, and based on this, the control circuit 4 controls the output voltage of each regulator circuit 2.3.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の電源回路は以上のように槽底されているので、第
２図の回路では整流電圧６が変化したり、出力電圧７が
変化した場合、シリーズレギュレータ回路２の損失が変
化してしまい、シリーズレギュレータ回路２の効率が悪
くなるという問題点があった。又、第３図の回路ではス
イッチングレギュレータ回路３の効率は良いが、出力電
圧７にスイッチングノイズが生じるため、このノイズが
負荷に妨害を引き起こすという問題点があった。Since the conventional power supply circuit is bottomed out as described above, in the circuit shown in Fig. 2, when the rectified voltage 6 or the output voltage 7 changes, the loss of the series regulator circuit 2 changes. There was a problem that the efficiency of the series regulator circuit 2 deteriorated. Further, in the circuit shown in FIG. 3, although the efficiency of the switching regulator circuit 3 is good, there is a problem in that switching noise occurs in the output voltage 7, and this noise causes disturbance to the load.

この発明は上記のような問題点を解消するためになされ
たもので、出力電圧のノイズ分をなくし、かつレギュレ
ータ回路の損失を一定化することにより、高い効率を有
する電源回路を得ることを目的とする。This invention was made to solve the above-mentioned problems, and aims to obtain a power supply circuit with high efficiency by eliminating the noise component of the output voltage and constantizing the loss of the regulator circuit. shall be.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る電源回路はスイッチング方式のレギュレ
ータ回路と、シリーズ方式のレギュレータ回路とを直列
につなぎ、かつ両回路の出力電圧を同時に制御する制御
回路を備えたものである。The power supply circuit according to the present invention connects a switching type regulator circuit and a series type regulator circuit in series, and includes a control circuit that simultaneously controls the output voltages of both circuits.

〔作用〕[Effect]

この発明における制御回路は、スイッチングレギュレー
タ回路とシリーズレギュレータ回路の出力電圧を同時に
制御することにより、シリーズレギュレータ回路の入出
力量電位差を一定にするから、その結果、回路の損失が
安定化し、効率が向上される。また、出力回路をシリー
ズレギュレータ回路とすることによって出力電圧のノイ
ズ分をなくすることができる。The control circuit in this invention makes the input/output potential difference of the series regulator circuit constant by controlling the output voltages of the switching regulator circuit and the series regulator circuit simultaneously.As a result, the loss of the circuit is stabilized and the efficiency is improved. be done. Further, by using a series regulator circuit as the output circuit, noise in the output voltage can be eliminated.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第１図において、１は整流回路、２はシリーズ方式のレ
ギュレータ回路、３はスイッチング方式のレギュレータ
回路、４はレギュレータ回路２゜３の出力電圧を制御す
る制御回路、５は負荷である。６は整流回路１より出力
される整流電圧、７はレギュレータ回路２．３より負荷
へ供給する出力電圧である。In FIG. 1, 1 is a rectifier circuit, 2 is a series type regulator circuit, 3 is a switching type regulator circuit, 4 is a control circuit for controlling the output voltage of the regulator circuit 2.3, and 5 is a load. 6 is a rectified voltage output from the rectifier circuit 1, and 7 is an output voltage supplied from the regulator circuit 2.3 to the load.

次にこの実施例の動作について説明する。Next, the operation of this embodiment will be explained.

整流回路ｌより出力される整流電圧６はスイッチング方
式のレギュレータ回路３に加えられる。A rectified voltage 6 output from the rectifier circuit 1 is applied to a switching type regulator circuit 3.

この回路３の出力電圧はわずかなスイッチングノイズを
伴った直流電圧であり、これがシリーズ方式のレギュレ
ータ回路２の入力電圧となる。レギュレータ回路２の出
力電圧７はノイズ分のない直流電圧となる。制御回路４
は負荷５から何らかの信号を受け、レギュレータ回路２
．３の出力電圧を、シリーズレギュレータ回路２の出力
電圧が上がる時はスイッチングレギュレータ回路３の出
力電圧も上げ、レギュレータ回路２の出力電圧が下がれ
ばレギュレータ回路３の出力電圧も下げるように制御す
ることによってシリーズ方式のレギュレータ回路２の入
出力量電位差を一定に保つ。このため、シリーズレギュ
レータの損失を安定化することができ、かつ電源回路の
出力電圧のスイッチングノイズをなくすことができる。The output voltage of this circuit 3 is a DC voltage with slight switching noise, and this becomes the input voltage of the series type regulator circuit 2. The output voltage 7 of the regulator circuit 2 becomes a DC voltage without noise. Control circuit 4
receives some signal from the load 5, and the regulator circuit 2
．． 3, by controlling the output voltage of the switching regulator circuit 3 so that when the output voltage of the series regulator circuit 2 increases, the output voltage of the switching regulator circuit 3 also increases, and when the output voltage of the regulator circuit 2 decreases, the output voltage of the regulator circuit 3 also decreases. The input/output potential difference of the series type regulator circuit 2 is kept constant. Therefore, the loss of the series regulator can be stabilized, and switching noise of the output voltage of the power supply circuit can be eliminated.

〔発明の効果〕〔Effect of the invention〕

この発明は以上に説明した通り、出力回路にシリーズ方
式のレギュレータ回路を採用したので出力電圧のノイズ
がなくなり、また、出力回路の前段にスイッチング方式
のレギュレータ回路を入れ、両回路を同時に制御できる
ように制御回路を構成したので、シリーズレギュレータ
回路の損失を一定にできるという効果がある。As explained above, this invention uses a series type regulator circuit for the output circuit, which eliminates output voltage noise, and also includes a switching type regulator circuit in the front stage of the output circuit, making it possible to control both circuits simultaneously. Since the control circuit is configured in this way, it has the effect of keeping the loss of the series regulator circuit constant.

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

第１図はこの発明の一実施例による電源回路を示すブロ
ック回路図、第２図、第３図は従来例の電源回路を示す
ブロック回路図である。 １・・・整流回路、２・・・シリーズ方式のレギュレー
タ回路、３・・・スイッチング方式のレギュレータ回路
、４・・・制御回路、５・・・負荷である。 なお図中同一符号は同−又は相当部分を示す。FIG. 1 is a block circuit diagram showing a power supply circuit according to an embodiment of the present invention, and FIGS. 2 and 3 are block circuit diagrams showing conventional power supply circuits. DESCRIPTION OF SYMBOLS 1... Rectifier circuit, 2... Series type regulator circuit, 3... Switching type regulator circuit, 4... Control circuit, 5... Load. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] （１）負荷に安定な電圧を供給するシリーズレギュレー
タ回路と、 このシリーズレギュレータ回路に電圧を与えるスイッチ
ング方式のレギュレータ回路と、上記両レギュレータ回
路の出力電圧を制御する制御回路とを備えたことを特徴
とする電源回路。(1) Features include a series regulator circuit that supplies stable voltage to the load, a switching type regulator circuit that supplies voltage to this series regulator circuit, and a control circuit that controls the output voltages of both of the regulator circuits. power supply circuit.
JP20073689A 1989-08-02 1989-08-02 Power source circuit Pending JPH0363807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20073689A JPH0363807A (en) 1989-08-02 1989-08-02 Power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20073689A JPH0363807A (en) 1989-08-02 1989-08-02 Power source circuit

Publications (1)

Publication Number Publication Date
JPH0363807A true JPH0363807A (en) 1991-03-19

Family

ID=16429321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20073689A Pending JPH0363807A (en) 1989-08-02 1989-08-02 Power source circuit

Country Status (1)

Country Link
JP (1) JPH0363807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012156864A (en) * 2011-01-27 2012-08-16 Anritsu Corp Magnetically tunable device drive circuit, measuring apparatus having the same, and magnetically tunable device drive method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012156864A (en) * 2011-01-27 2012-08-16 Anritsu Corp Magnetically tunable device drive circuit, measuring apparatus having the same, and magnetically tunable device drive method

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