JPH01282972A - High voltage stabilizing circuit for television receiver - Google Patents
High voltage stabilizing circuit for television receiverInfo
- Publication number
- JPH01282972A JPH01282972A JP11292688A JP11292688A JPH01282972A JP H01282972 A JPH01282972 A JP H01282972A JP 11292688 A JP11292688 A JP 11292688A JP 11292688 A JP11292688 A JP 11292688A JP H01282972 A JPH01282972 A JP H01282972A
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- circuit
- differential amplifier
- output
- differentiating
- 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
- 230000000087 stabilizing effect Effects 0.000 title claims description 9
- 239000003990 capacitor Substances 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000009499 grossing Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、陰極線管（以下、ＣＲＴと称す）のアノー
ドに供給する直流の高圧電圧を安定化するためのテレビ
ジョン受信機の高圧安定化回路に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to high-voltage stabilization of a television receiver for stabilizing the high-voltage direct current supplied to the anode of a cathode ray tube (hereinafter referred to as CRT). It is related to circuits.
［従来の技術］
第３図は従来のテレビジョン受信機の高圧安定化回路を
示す構成図であり、同図において、（１１）は高圧発生
回路で、この高圧発生回路（１１）はフライバックトラ
ンス（以下、ＦＢＴと称す）（１）と整流ダイオード（
２）とからなる。（３）は平滑コンデンサで、上記高圧
発生回路（１１）で発生された高圧を平滑化して、図示
しないＣＲＴのアノードに印加する。[Prior Art] Fig. 3 is a block diagram showing a high voltage stabilizing circuit of a conventional television receiver. In the figure, (11) is a high voltage generating circuit, and this high voltage generating circuit (11) is a flyback A transformer (hereinafter referred to as FBT) (1) and a rectifier diode (
2). (3) is a smoothing capacitor which smoothes the high voltage generated by the high voltage generating circuit (11) and applies it to the anode of a CRT (not shown).
（１２）は高圧分割回路て、この高圧分割回路（１２）
は２つの抵抗（５） 、 （６）により高圧を分割する
。(12) is a high voltage dividing circuit, this high voltage dividing circuit (12)
divides the high voltage by two resistors (5) and (6).
（７）は差動増幅器で、この差動増幅器（７）の一方の
入力に上記高圧分割回路（１２）の出力か、かつ他方の
入力に基準電圧１１Ａ（８）を介して基準電圧がそれぞ
れ接続され、それら両者の比較にもとづく差値が出力さ
れる。（１３）は帰還回路で、この帰還回路（１３）は
上記差動増幅器（７）の出力をトランジスタ（１４）を
介して上記高圧発生回路（１１）におけるＦ Ｂ Ｔ
（１）の−次側に帰還する。(7) is a differential amplifier, one input of which is the output of the high voltage divider circuit (12), and the other input is connected to the reference voltage via the reference voltage 11A (8). are connected, and a difference value based on a comparison between the two is output. (13) is a feedback circuit, and this feedback circuit (13) feeds the output of the differential amplifier (7) through a transistor (14) to the FBT in the high voltage generation circuit (11).
Return to the negative side of (1).
なお、第３図中、（１５）は水平出力回路で、共振コン
デンサ（１６）、スイッチング用出力トランジスタ（１
７）、ダンパーダイオード（１８）からなり、偏向コイ
ル（Ｉ９）にのこぎり波型流を供給するとともに、回路
内に生じるフライバックパルスを上記高圧発生回路（Ｉ
Ｉ）に供給する役割りを有する。In Figure 3, (15) is a horizontal output circuit, which includes a resonant capacitor (16) and a switching output transistor (1
7), consists of a damper diode (18), which supplies a sawtooth wave current to the deflection coil (I9), and also transmits the flyback pulse generated in the circuit to the high voltage generation circuit (I9).
I).
つぎに、上記構成の動作について説明する。Next, the operation of the above configuration will be explained.
Ｆ Ｂ Ｔ （１）および整流タイオート（２）からな
る高圧発生回路（１１）で発生された高圧は、平滑コン
デンサ（３）により平滑化されてＣＲＴのアノードに印
加される。このとき、上記高圧は高圧分割回路（１２）
における２つの抵抗（！ｒ） 、 （６）により分割さ
れ、その出力か差動増幅器（７）の一方に入力されて基
準電圧との比較かおこなわれる。ここで、分割された高
圧が基準電圧よりも低ければ上記高圧発生回路（１１）
での発生電圧を一ヒげるように、また基準電圧よりも高
ければ発生電圧を下げるように、上記差動増幅器（７）
の出力を帰還回路（１３）を通して上記高圧発生回路（
１１）におけるＦ Ｂ Ｔ （１）の−次側に帰還させ
て高圧を調整することにより、ＣＲＴのアノードに印加
する高圧を安定化する。A high voltage generated by a high voltage generating circuit (11) consisting of F B T (1) and a rectifier tie-out (2) is smoothed by a smoothing capacitor (3) and applied to the anode of the CRT. At this time, the high voltage is connected to the high voltage dividing circuit (12).
The voltage is divided by two resistors (!r) and (6), and its output is input to one of the differential amplifiers (7) and compared with a reference voltage. Here, if the divided high voltage is lower than the reference voltage, the high voltage generating circuit (11)
The differential amplifier (7)
The output of is passed through the feedback circuit (13) to the high voltage generation circuit (
The high voltage applied to the anode of the CRT is stabilized by feeding back to the negative side of F B T (1) in 11) and adjusting the high voltage.
［発明が解決しようとする課題］
以上のように構成された従来のテレビジョン受信機の高
圧安定化回路によれば、高圧分割回路（１２）における
２つの抵抗（５） 、 （６）と、その分割点から差動
増幅器（７）に至るまでの部分（Ａ）に発生する漂遊容
量とにより積分回路が形成されるために、動作中に第４
図（ａ）で示すような波形の高圧変動があった場合、差
動増幅器（７）への入力波形、すなわちＣＲＴのアノー
ドの電圧波形が第４図（ｂ）で示すようになまり、その
結果、高圧変動に対する追随性か悪くて画面が不安定に
なるという問題かあった。[Problems to be Solved by the Invention] According to the conventional high voltage stabilizing circuit of a television receiver configured as described above, the two resistors (5) and (6) in the high voltage dividing circuit (12), Since an integrating circuit is formed by the stray capacitance generated in the portion (A) from the dividing point to the differential amplifier (7), the fourth
When there is a high voltage fluctuation in the waveform as shown in Figure 4(a), the input waveform to the differential amplifier (7), that is, the voltage waveform at the anode of the CRT, becomes as shown in Figure 4(b), resulting in However, there was a problem with the screen being unstable due to poor tracking of high voltage fluctuations.
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
５たもので、高圧変動に対する追随性に優れ、画面を安
定よく保持することができるテレビジョン受信機の高圧
安定化回路を提供することを目的とする。This invention was made in order to solve the above-mentioned problems, and provides a high-voltage stabilizing circuit for a television receiver that has excellent followability to high-voltage fluctuations and is capable of stably holding the screen. With the goal.
［課題を解決するための手段］
この発明にかかるテレビジョン受信機の高圧安定化回路
は、高圧発生回路で発生した高圧を微分する微分回路を
設けて、その微分波形を高圧分割回路の出力に加え合せ
て差動増幅器の一方に入力するように構成したことを特
徴とする。[Means for Solving the Problems] A high voltage stabilizing circuit for a television receiver according to the present invention includes a differentiating circuit that differentiates the high voltage generated by the high voltage generating circuit, and outputs the differentiated waveform of the high voltage dividing circuit. It is characterized in that it is configured to be added to one side of the differential amplifier.
［作用］
この発明によれば、動作中に高圧変動があった場合、高
圧分割回路の分割抵抗とその分割点から差動増幅器に至
るまでの回路部分の漂遊容量とで形成される積分回路の
積分動作により、差動増幅器への入力波形になまりを生
じるが、このとき、上記微分回路で得られる微分波形を
上記積分回路の出力に加え合せることで、波形のなまり
を解消することかできる。[Function] According to the present invention, when there is a high voltage fluctuation during operation, the integration circuit formed by the dividing resistor of the high voltage dividing circuit and the stray capacitance of the circuit portion from the dividing point to the differential amplifier is activated. The integration operation causes the input waveform to the differential amplifier to become rounded, but at this time, by adding the differential waveform obtained by the differentiating circuit to the output of the integrating circuit, the waveform rounding can be eliminated.
［発明の実施例］
以下、この発明の一実施例を図面にもとづいて説明する
。[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.
第１図はこの発明の一実施例によるテレビジョン受信機
の高圧安定化回路の構成図であり、同図において、（２
０）は微分回路で、この微分回路（２０）は、高圧の平
滑コンデンサ（３）に直列に接続した２つの抵抗（４）
、（９）とその分割点から分岐して接続したコンデンサ
（ｌＯ）とからなり、かつこの微分回路（２０）の出力
を上記高圧分割回路（１２）の出力に加え合せて差動増
幅器（７）の一方に入力するように構成しである。その
他の構成は第３図で示す従来例と同一であるため、同一
の符号を付して、それらの詳しい説明を省略する。FIG. 1 is a block diagram of a high voltage stabilizing circuit of a television receiver according to an embodiment of the present invention.
0) is a differentiating circuit, and this differentiating circuit (20) consists of two resistors (4) connected in series to a high voltage smoothing capacitor (3).
, (9) and a capacitor (lO) branched from the dividing point and connected, and the output of this differentiating circuit (20) is added to the output of the high voltage dividing circuit (12) to form a differential amplifier (7). ). Since the other configurations are the same as the conventional example shown in FIG. 3, the same reference numerals are given and detailed explanation thereof will be omitted.
つぎに、上記構成の動作について説明する。Next, the operation of the above configuration will be explained.
高圧発生回路（１１）による高圧の発生から、差動増幅
器（７）の出力を帰還回路（１３）を通して上記高圧発
生回路（１１）の−次側に帰還させて高圧を調整する動
作は従来例で説明した通りであるか、このような動作に
おいて、上記微分回路（２０）で得られる第２図（ｃ）
で示すような微分波形が上記高圧分割回路（１２）の出
力に加え合せられるため、第２図（ａ）て示すような波
形の高圧変動があった際に上記高圧分割回路（１２）に
形成される積分回路の積分動作で生じる第２図（ｂ）で
示すようななまりのある波形は上記微分波形（ｃ）によ
って解消され、ＣＲＴのアノードには第２図（ｄ）て示
すように、なまりのない高圧を安定よく印加することか
てきる。The operation of generating high voltage by the high voltage generating circuit (11) and then returning the output of the differential amplifier (7) to the negative side of the high voltage generating circuit (11) through the feedback circuit (13) to adjust the high voltage is conventional. Is it as explained in Figure 2(c) obtained by the above-mentioned differentiating circuit (20) in such an operation?
Since the differential waveform shown in is added to the output of the high voltage dividing circuit (12), when there is a high voltage fluctuation in the waveform shown in FIG. The rounded waveform shown in FIG. 2(b) caused by the integrating operation of the integrating circuit is eliminated by the differential waveform (c), and the CRT anode has a waveform as shown in FIG. 2(d). It is possible to stably apply high voltage without distortion.
［発明の効果］
以上のように、この発明によれば、２つの分割抵抗およ
びコンデンサからなる微分回路を付加するだけの簡単な
改良によって、高圧変動に対する追随性をいちじるしく
改善することかでき、常に安定した画面を得ることがで
きるという効果を奏する。[Effects of the Invention] As described above, according to the present invention, the ability to follow high voltage fluctuations can be significantly improved by simply adding a differentiating circuit consisting of two dividing resistors and a capacitor. This has the effect of providing a stable screen.
第１図はこの発明の一実施例によるテレビジョン受信機
の高圧安定化回路の構成図、第２図は動作を説明するた
めの波形図、第３図は従来のテレビジョン受信機の高圧
安定化回路の構成図、第４図は第３図の動作を説明する
ための波形図である。
（１）・・・ＦＢＴ、（２）・・・整流ダイオード、（
４）、（５）、（６）、（９）・・・分割抵抗、 （７
）・・・差動増幅器、（８）−・・基準電圧源、（１０
）・・・コンデンサ、（１１）・・・高圧発生回路、
（１２）・・・高圧分割回路、（１３）・・・帰還回路
、 （２０） −・・微分回路。
なお、図中の同一符号は同一または相当部分を示す。Fig. 1 is a block diagram of a high voltage stabilization circuit of a television receiver according to an embodiment of the present invention, Fig. 2 is a waveform diagram for explaining the operation, and Fig. 3 is a high voltage stabilization circuit of a conventional television receiver. FIG. 4 is a waveform diagram for explaining the operation of FIG. 3. (1)...FBT, (2)... Rectifier diode, (
4), (5), (6), (9)...divided resistance, (7
)... Differential amplifier, (8) -... Reference voltage source, (10
)...Capacitor, (11)...High voltage generation circuit,
(12)...High voltage dividing circuit, (13)...Feedback circuit, (20) -...Differentiating circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
高圧を抵抗分割する高圧分割回路と、この高圧分割回路
の出力を基準電圧と比較する差動増幅器と、この差動増
幅器の出力を上記高圧発生回路の一次側に帰還させる帰
還回路とを備えたテレビジョン受信機の高圧安定化回路
において、上記高圧発生回路で発生された高圧を微分す
る微分回路を設け、この微分回路の出力を上記高圧分割
回路の出力に加えて差動増幅器に入力するように構成し
たことを特徴とするテレビジョン受信機の高圧安定化回
路。(1) A high voltage generation circuit, a high voltage division circuit that divides the high voltage generated by this high voltage generation circuit with resistance, a differential amplifier that compares the output of this high voltage division circuit with a reference voltage, and a differential amplifier that compares the output of this differential amplifier with a reference voltage. In a high voltage stabilizing circuit for a television receiver including a feedback circuit for feeding back to the primary side of the high voltage generating circuit, a differentiating circuit for differentiating the high voltage generated by the high voltage generating circuit is provided, and the output of this differentiating circuit is A high voltage stabilizing circuit for a television receiver, characterized in that the circuit is configured to input the output of the high voltage dividing circuit to a differential amplifier in addition to the output of the high voltage dividing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11292688A JPH01282972A (en) | 1988-05-09 | 1988-05-09 | High voltage stabilizing circuit for television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11292688A JPH01282972A (en) | 1988-05-09 | 1988-05-09 | High voltage stabilizing circuit for television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01282972A true JPH01282972A (en) | 1989-11-14 |
Family
ID=14598947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11292688A Pending JPH01282972A (en) | 1988-05-09 | 1988-05-09 | High voltage stabilizing circuit for television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01282972A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03102971A (en) * | 1989-09-18 | 1991-04-30 | Hitachi Ltd | High voltage stabilization circuit |
| JP2016111442A (en) * | 2014-12-03 | 2016-06-20 | オンキヨー株式会社 | Signal modulation circuit |
-
1988
- 1988-05-09 JP JP11292688A patent/JPH01282972A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03102971A (en) * | 1989-09-18 | 1991-04-30 | Hitachi Ltd | High voltage stabilization circuit |
| JP2016111442A (en) * | 2014-12-03 | 2016-06-20 | オンキヨー株式会社 | Signal modulation circuit |
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