CN103683256B - Be suitable for the holding circuit of DVD player - Google Patents
Be suitable for the holding circuit of DVD player Download PDFInfo
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- CN103683256B CN103683256B CN201310612475.1A CN201310612475A CN103683256B CN 103683256 B CN103683256 B CN 103683256B CN 201310612475 A CN201310612475 A CN 201310612475A CN 103683256 B CN103683256 B CN 103683256B
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Abstract
The invention discloses a kind of holding circuit that is suitable for DVD player, it comprises transformer, the one end on the first former limit of transformer is connected in resistance R 4, resistance R 4 is passed through resistance R 1 and is connected at the negative electrode of diode D1, the other end on the first former limit is connected on the anode of diode D2, the negative electrode of diode D2 is connected on the common port of resistance R 4 and resistance R 1, the anodic bonding of diode D1 is in the base stage of triode T1, the colelctor electrode of triode T1 is connected with the base stage of triode T2 by capacitor C 1, the colelctor electrode of triode T2 is connected with the one end on the second former limit of transformer, one end of the secondary of transformer is connected to the ground by resistance R 5, the other end is connected in resistance R 6, the negative electrode that the other end of resistance R 6 is connected to diode D3 is connected, the plus earth of diode D3. its advantage is: port is carried out to overvoltage protection, avoid overtension to damage DVD player.
Description
Technical field
The present invention relates to a kind of holding circuit, relate in particular a kind of holding circuit that is suitable for DVD player.
Background technology
DVD player is very universal, and it is applied in home theater, and almost every family has. Because the inside of DVD player is integrated with a lot of electronic devices and components, DVD player in use, DVD player breaks down sometimes, in the time that too high voltage acts on DVD player, can make the internal electronic component of electronic equipment wreck, when serious, may make electronic devices and components damage, can not work, this will bring certain economic loss the DVD player more renewing.
Summary of the invention
The invention provides a kind of holding circuit that is suitable for DVD player, it is connected on the port of DVD player, and port is carried out to overvoltage protection, avoids overtension to damage DVD player.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
Be suitable for the holding circuit of DVD player, it comprises transformer, the one end on the first former limit of described transformer is connected in resistance R 4, described resistance R 4 is connected with the negative electrode of diode D1 by resistance R 1, the other end on the first described former limit is connected on the anode of diode D2, the negative electrode of described diode D2 is connected on the common port of resistance R 4 and resistance R 1, the anodic bonding of described diode D1 is in the base stage of triode T1, the colelctor electrode of described triode T1 is connected with the base stage of triode T2 by capacitor C 1, the colelctor electrode of described triode T2 is connected with the one end on the second former limit of transformer, the grounded emitter of described triode T1, the emitter stage of described triode T2 is connected to the ground by resistance R 3, one end of the secondary of described transformer is connected to the ground by resistance R 5, the other end is connected in resistance R 6, the negative electrode that the other end of described resistance R 6 is connected to diode D3 is connected, the plus earth of described diode D3.
Further technical scheme is:
As preferably, the emitter stage of described triode T1 is connected to the ground by resistance R 2.
Further, the resistance of described resistance R 3 is greater than the resistance of resistance R 2.
Compared with prior art, the invention has the beneficial effects as follows:
Circuit structure of the present invention is simple, is connected on the port circuit of DVD player, and DVD player is carried out to overvoltage protection, avoids overtension to damage DVD player, guarantees the safety of DVD player.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Label in figure is: 1, port A; 2, port B.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated. Embodiments of the present invention include but not limited to the following example.
[embodiment]
The holding circuit that is suitable for DVD player as shown in Figure 1, it comprises transformer, the one end on the first former limit of described transformer is connected in resistance R 4, described resistance R 4 is connected with the negative electrode of diode D1 by resistance R 1, the other end on the first described former limit is connected on the anode of diode D2, the negative electrode of described diode D2 is connected on the common port of resistance R 4 and resistance R 1, the anodic bonding of described diode D1 is in the base stage of triode T1, the colelctor electrode of described triode T1 is connected with the base stage of triode T2 by capacitor C 1, the colelctor electrode of described triode T2 is connected with the one end on the second former limit of transformer, the grounded emitter of described triode T1, the emitter stage of described triode T2 is connected to the ground by resistance R 3, one end of the secondary of described transformer is connected to the ground by resistance R 5, the other end is connected in resistance R 6, the negative electrode that the other end of described resistance R 6 is connected to diode D3 is connected, the plus earth of described diode D3. in the present invention, the negative electrode of diode D3 is port A1, and the not link on the second former limit of transformer is port B2. this circuit is connected on the port circuit of DVD player. when the voltage of port A is during higher than rated value, the corresponding increase of induced voltage in Transformer Winding, in the time that the cathode voltage of diode D2 increases to a certain degree, diode D1 punctures, triode T1 conducting, the triode T2 failure of oscillations, thus shield. ineffective when it, cause that the voltage of port A further increases, in the time that this terminal voltage increases to the voltage stabilizing value of diode D3, diode D3 punctures conducting, makes triode T2 be tending towards failure of oscillation state, continues to shield. this circuit has dual over-voltage protecting function, and the reliability of overvoltage protection effect is strengthened, and the electronic devices and components of DVD player are protected, and guarantees the safety of DVD player.
In order further triode T1 to be protected, the emitter stage of described triode T1 is connected to the ground by resistance R 2. Contact resistance R2 on the emitter stage of triode T1, can protect triode T1, and the voltage of emitter stage is raised.
For this circuit making can effectively drive triode T2, the resistance of described resistance R 3 is greater than the resistance of resistance R 2. The transmitting of the triode T1 very base stage of triode T2 provides conducting voltage, and the resistance of resistance R 3 is greater than the resistance of resistance R 2, could effectively drive triode T2.
Be as mentioned above embodiments of the invention. The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (3)
1. be suitable for the holding circuit of DVD player, it is characterized in that: it comprises transformer, the one end on the first former limit of described transformer is connected in resistance R 4, described resistance R 4 is connected with the negative electrode of diode D1 by resistance R 1, the other end on the first described former limit is connected on the anode of diode D2, the negative electrode of described diode D2 is connected on the common port of resistance R 4 and resistance R 1, the anodic bonding of described diode D1 is in the base stage of triode T1, the colelctor electrode of described triode T1 is connected with the base stage of triode T2 by capacitor C 1, the colelctor electrode of described triode T2 is connected with the one end on the second former limit of transformer, the other end on the second former limit of transformer is for connecting the port circuit of DVD player, the grounded emitter of described triode T1, the emitter stage of described triode T2 is connected to the ground by resistance R 3, one end of the secondary of described transformer is connected to the ground by resistance R 5, the other end is connected in resistance R 6, the negative electrode that the other end of described resistance R 6 is connected to diode D3 is connected, the plus earth of described diode D3.
2. the holding circuit that is suitable for DVD player according to claim 1, is characterized in that: the emitter stage of described triode T1 is connected to the ground by resistance R 2.
3. the holding circuit that is suitable for DVD player according to claim 2, is characterized in that: the resistance of described resistance R 3 is greater than the resistance of resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612475.1A CN103683256B (en) | 2013-11-28 | 2013-11-28 | Be suitable for the holding circuit of DVD player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612475.1A CN103683256B (en) | 2013-11-28 | 2013-11-28 | Be suitable for the holding circuit of DVD player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103683256A CN103683256A (en) | 2014-03-26 |
| CN103683256B true CN103683256B (en) | 2016-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612475.1A Active CN103683256B (en) | 2013-11-28 | 2013-11-28 | Be suitable for the holding circuit of DVD player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103683256B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159518A (en) * | 1990-01-17 | 1992-10-27 | Vlsi Technology, Inc. | Input protection circuit for CMOS devices |
| CN103248034A (en) * | 2013-05-15 | 2013-08-14 | 成都市宏山科技有限公司 | Lightning protection USB flash disk |
| CN203233159U (en) * | 2013-05-15 | 2013-10-09 | 成都市宏山科技有限公司 | MP3 player with electrostatic protection and surge protection |
-
2013
- 2013-11-28 CN CN201310612475.1A patent/CN103683256B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159518A (en) * | 1990-01-17 | 1992-10-27 | Vlsi Technology, Inc. | Input protection circuit for CMOS devices |
| CN103248034A (en) * | 2013-05-15 | 2013-08-14 | 成都市宏山科技有限公司 | Lightning protection USB flash disk |
| CN203233159U (en) * | 2013-05-15 | 2013-10-09 | 成都市宏山科技有限公司 | MP3 player with electrostatic protection and surge protection |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型机载防浪涌电压保护电路;戴钱坤等;《电子技术应用》;20111130;第37卷(第11期);第58-60页 * |
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| Publication number | Publication date |
|---|---|
| CN103683256A (en) | 2014-03-26 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Jian Inventor before: Huang Youhua |
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| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170622 Address after: 510880 ninth economic community, Xin Hua Cun, Huadu Town, Huadu District, Guangdong, Guangzhou Patentee after: Guangzhou blue ray Electronic Technology Co., Ltd. Address before: 610000 No. 20, Yongfeng Road, hi tech Zone, Sichuan, Chengdu 2, 1 Patentee before: Chengdu Hongshan Technology Co., Ltd. |
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| TR01 | Transfer of patent right |