CN101699690B - Multimedia data card - Google Patents
Multimedia data card Download PDFInfo
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- CN101699690B CN101699690B CN200910110684XA CN200910110684A CN101699690B CN 101699690 B CN101699690 B CN 101699690B CN 200910110684X A CN200910110684X A CN 200910110684XA CN 200910110684 A CN200910110684 A CN 200910110684A CN 101699690 B CN101699690 B CN 101699690B
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Abstract
The invention provides a multimedia data card, comprising a USB interface, a switch power supply switching circuit, a data card baseband circuit, a data card radio frequency circuit, an energy storage tantalum capacitor and a quick discharge circuit. The quick discharge circuit comprises a low conduction threshold P slot field-effect transistor and a discharge current regulation resistor, wherein the grid of the low conduction threshold P slot field-effect transistor is connected with the USB interface, while the source level is connected with the anode of the energy storage tantalum capacitor, and the drain is connected with the discharge current regulation resistor. The multimedia data card, through ingenious application of the discharge circuit, avoids invalidation even damage when the data card is plugged and unplugged because of discharge effect of the large-bulk energy storage tantalum capacitor C4, plays a good role of protection, and improves the service life and the working reliability of the multimedia data card.
Description
Technical field
The present invention relates to the improved multimedia data card in a kind of field of mobile communication.
Background technology
As shown in fig. 1; The enhanced multimedia data card generally comprise usb 10, Switching Power Supply change-over circuit 11, data card baseband circuit 12 and data card radio circuit 13; When multimedia data card inserts the computer USB interface online; Computer USB interface is the DC power supply that the usb 10 of multimedia data card provides 5V/500mA, and the power reguirements of general multimedia data card is the 4V DC power supply, therefore; The 5V DC power supply that the above-mentioned Switching Power Supply change-over circuit 11 that need adopt is imported USB interface converts the DC power supply output of 4V/500mA into, and this 4V DC power supply supplies power for data card baseband circuit 12 and data card radio circuit 13.Because multimedia data card is supported multimode standards such as TD-SCDMA/HSDPA, GSM/EDGE; These communication standards all are time-division emission and time-division to receive mode of operation; When multimedia data card is in the state of emission communication; Data card radio circuit 13 needs to start radio-frequency power amplifier 15 (antenna) and comes the amplifying emission signal, like this, could send to base station equipment at a distance through amplifying signal; Radio-frequency power amplifier 15 has the peak operation current more than the 1A when work; But USB interface can only provide the electric current of 500mA, in order to ensure radio-frequency power amplifier 15 operate as normal, need and connect a big capacity energy storage tantalum capacitor C 4 (generally adopting the tantalum electric capacity of 2200uF/6.3V rated operational voltage) at the power supply input of data card radio circuit 13; This energy storage tantalum capacitor C 4 gives the data card radio circuit 13 discharges through the energy storage of himself when data card radio circuit 13 is in emission state, thereby has replenished the not enough problem of computer USB supply current; When data card radio circuit 13 was in the low power consumpting state of reception, energy storage tantalum capacitor C 4 was carried out energy storage, prepared for externally supply power next time.
When not needing the multimedia data card online, the user generally can extract multimedia data card, and can store bigger electric weight on the big capacity energy storage tantalum capacitor C 4 this moment, and these electric weight will consume through the leakage current of data card electric power system gradually.Because the leakage current of multimedia data card is below the 0.1mA; Storing electricity on the therefore big capacity energy storage tantalum capacitor C 4 needs certain hour just can bleed off fully; And if the user has just extracted computer at multimedia data card and is inserted into computer soon immediately again and uses (storing electricity on the energy storage tantalum capacitor C 4 does not consume as yet); Owing to insert on the moment power supply at USB and to have instantaneous peak voltage, this peak voltage is applied on the big capacity energy storage tantalum capacitor C 4 that also stores electric weight after (for example tantalum electric capacity), surpasses the rated operational voltage of tantalum electric capacity 6.3V possibly; When peak voltage surpasses tantalum electric capacity rated operational voltage; Tantalum electric capacity is easy to impaired or lost efficacy, and serious meeting burning even blast are because tantalum electric capacity contains MnO2 (manganese dioxide); Play combustion-supporting effect and MnO2 is prone to decomposite O2, so we need, multimedia data card bleed off the electric weight of storing on the big capacity energy storage tantalum electric capacity rapidly immediately when extracting computer.
Summary of the invention
The purpose of this invention is to provide a kind of multimedia data card, be intended to solve the technological deficiency that the multimedia data card that exists in the prior art can't repid discharge.
Multimedia data card provided by the invention comprises USB interface, Switching Power Supply change-over circuit, data card baseband circuit, data card radio circuit and energy storage tantalum electric capacity; Said Switching Power Supply change-over circuit exports data card baseband circuit and data card radio circuit to after the DC power supply of USB interface input is changed; Said energy storage tantalum electric capacity is attempted by the power supply input of data card radio circuit; Said multimedia data card also comprises a quick discharging circuit; Said quick discharging circuit comprises a low turn-on threshold P-channel field-effect transistor (PEFT) pipe and discharging current adjusting resistance; The grid of said low turn-on threshold P-channel field-effect transistor (PEFT) pipe connects USB interface, and source class connects the positive pole of energy storage tantalum electric capacity, and drain electrode connects discharging current and regulates resistance.
More specifically, said discharging current is regulated the other end ground connection of resistance.
More specifically, said energy storage tantalum electric capacity is the big capacity tantalum electric capacity of 2200uF/6.3V rated operational voltage.
More specifically, said multimedia data card further comprises the radio-frequency power amplifier that connects the data card radio circuit.
More specifically, said USB interface is the USB interface that the 5V/500mA DC power supply is provided.
More specifically, said Switching Power Supply change-over circuit power source conversion that USB interface is provided becomes the 4V DC power supply.
Multimedia data card provided by the invention is through the smart application of discharge circuit; The inefficacy even the damage that have caused when having avoided discharge effect owing to big capacity energy storage tantalum capacitor C 4 to cause data card to plug repeatedly; Play the better protect effect, strengthened the useful life and the functional reliability of multimedia data card.
Description of drawings
Fig. 1 is the electrical block diagram of existing multimedia data card;
Fig. 2 is the electrical block diagram of multimedia data card of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Shown in Fig. 2; The preferred embodiment of multimedia data card of the present invention is that a quick discharging circuit is set in original multimedia data card; This quick discharging circuit comprises a low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 and discharging current adjusting resistance R 1; The grid G of low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 connects the input of the 5V power supply of USB interface, and source class S connects the positive pole of big capacity energy storage tantalum capacitor C 4, and drain D connects discharging current and regulates resistance R 1.When multimedia data card was inserted into USB interface, the grid G of low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 had 5V voltage (usb 10 provides), and source class S is 4V, and therefore low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 is by obstructed; When multimedia data card is extracted computer; The 5V voltage that usb 10 provides becomes 0V; This moment, the grid G of low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 was a 0V voltage, and source class S is because of the voltage that about 4V is arranged on the positive pole of receiving big capacity energy storage tantalum electric capacity, and therefore low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 is with the moment conducting; The electric weight of storage will flow into from the source class S of low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 on the big capacity energy storage tantalum capacitor C 4; Flow out from the drain D of low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1, discharging current flows through discharging current after through low turn-on threshold P-channel field-effect transistor (PEFT) pipe U1 to be regulated resistance R 1 and discharge over the ground, through regulating the size of discharging current adjusting resistance R 1; Can also regulate the size of discharging current, i.e. scalable discharge time.This preferred embodiment is through the smart application of discharge circuit, and the better protect effect has been played in the inefficacy even the damage that have caused when having avoided discharge effect owing to big capacity energy storage tantalum capacitor C 4 to cause data card to plug repeatedly.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within the protection range of claim of the present invention.
Claims (5)
1. multimedia data card; It comprises: USB interface, Switching Power Supply change-over circuit, data card baseband circuit, data card radio circuit and energy storage tantalum electric capacity; Said Switching Power Supply change-over circuit exports data card baseband circuit and data card radio circuit to after the DC power supply of USB interface input is changed, and said energy storage tantalum electric capacity is attempted by the power supply input of data card radio circuit, it is characterized in that; Further comprise a quick discharging circuit; Said quick discharging circuit comprises a low turn-on threshold P-channel field-effect transistor (PEFT) pipe and discharging current adjusting resistance, and the grid of said low turn-on threshold P-channel field-effect transistor (PEFT) pipe connects USB interface, and source class connects the positive pole of energy storage tantalum electric capacity; Drain electrode connects the end that discharging current is regulated resistance, and said discharging current is regulated the other end ground connection of resistance.
2. multimedia data card according to claim 1 is characterized in that, said energy storage tantalum electric capacity is the big capacity tantalum electric capacity of 2200uF/6.3V rated operational voltage.
3. multimedia data card according to claim 1 is characterized in that, said multimedia data card further comprises the radio-frequency power amplifier that connects the data card radio circuit.
4. multimedia data card according to claim 1 is characterized in that, said USB interface is the USB interface that the 5V/500mA DC power supply is provided.
5. multimedia data card according to claim 4 is characterized in that, the power source conversion that said Switching Power Supply change-over circuit provides USB interface becomes the 4V DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910110684XA CN101699690B (en) | 2009-10-21 | 2009-10-21 | Multimedia data card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910110684XA CN101699690B (en) | 2009-10-21 | 2009-10-21 | Multimedia data card |
Publications (2)
| Publication Number | Publication Date |
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| CN101699690A CN101699690A (en) | 2010-04-28 |
| CN101699690B true CN101699690B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910110684XA Active CN101699690B (en) | 2009-10-21 | 2009-10-21 | Multimedia data card |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887530B (en) | 2010-07-07 | 2013-11-06 | 中兴通讯股份有限公司 | Switching device provided with a battery data card and implementation method of power conservation |
| CN101969192A (en) * | 2010-09-09 | 2011-02-09 | 惠州Tcl移动通信有限公司 | Communication terminal for protecting universal serial bus (USB) power supply equipment |
| CN103095467A (en) * | 2011-10-31 | 2013-05-08 | 成都高新区尼玛电子产品外观设计工作室 | System controlling switch through outer data line |
| CN106851025A (en) * | 2017-01-03 | 2017-06-13 | 惠州Tcl移动通信有限公司 | A kind of switch discharge device and mobile terminal for preventing power supply short circuit |
| CN115882721A (en) * | 2022-12-27 | 2023-03-31 | 上海芯聆半导体科技有限公司 | Charge pump circuit, control method thereof, chip and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101135926A (en) * | 2006-08-29 | 2008-03-05 | 中兴通讯股份有限公司 | Data card self-adapting power supply method and system |
| CN101425701A (en) * | 2008-11-26 | 2009-05-06 | Tcl天一移动通信（深圳）有限公司 | Wireless data card and electricity supply method for the card |
| CN101453319A (en) * | 2007-11-29 | 2009-06-10 | 北京中电华大电子设计有限责任公司 | USB interface wireless network card compatible with multiple security standards |
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2009
- 2009-10-21 CN CN200910110684XA patent/CN101699690B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135926A (en) * | 2006-08-29 | 2008-03-05 | 中兴通讯股份有限公司 | Data card self-adapting power supply method and system |
| CN101453319A (en) * | 2007-11-29 | 2009-06-10 | 北京中电华大电子设计有限责任公司 | USB interface wireless network card compatible with multiple security standards |
| CN101425701A (en) * | 2008-11-26 | 2009-05-06 | Tcl天一移动通信（深圳）有限公司 | Wireless data card and electricity supply method for the card |
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| CN101699690A (en) | 2010-04-28 |
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Effective date of registration: 20201224 Address after: 225700 plant area (Economic Development Zone), 2nd floor, No.2 factory building, Xinghua science and technology entrepreneurship center, Taizhou City, Jiangsu Province Patentee after: Jiangsu JieChuang Enterprise Management Co.,Ltd. Address before: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee before: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201224 Address after: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee after: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Address before: 518067 Guangdong city of Shenzhen province Nanshan District South Road Building B block 15 building TCL Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |
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Effective date of registration: 20220104 Address after: 252000 No. 5 Lushan South Road, Liaocheng High-tech Industrial Development Zone, Shandong Province Patentee after: Shandong Yide Electrical Equipment Engineering Co.,Ltd. Address before: 225700 plant area (Economic Development Zone), 2nd floor, No.2 factory building, Xinghua science and technology entrepreneurship center, Taizhou City, Jiangsu Province Patentee before: Jiangsu JieChuang Enterprise Management Co.,Ltd. |
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