CN201352829Y - Encapsulation module of mobile digital television receiving circuit system - Google Patents
Encapsulation module of mobile digital television receiving circuit system Download PDFInfo
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- CN201352829Y CN201352829Y CNU2009201049221U CN200920104922U CN201352829Y CN 201352829 Y CN201352829 Y CN 201352829Y CN U2009201049221 U CNU2009201049221 U CN U2009201049221U CN 200920104922 U CN200920104922 U CN 200920104922U CN 201352829 Y CN201352829 Y CN 201352829Y
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Abstract
The utility model provides an encapsulation module of a mobile digital television receiving circuit system, comprising a printed circuit board, a radio frequency circuit module encapsulated on the printed circuit board, a digital television demodulation circuit module and a power supply circuit module, a plurality of ground planes and ground circuits are arranged on the printed circuit board and extend to the edge of the printed circuit board for forming ground points of the system and the ground points of the printed circuit board. Therefore, the encapsulation module reduces the interference of digital television signals by the ground circuits and the ground planes arranged on the printed circuit board, thereby improving the stability and the reliability of signal receiving and data transmission of a digital television. In addition, the digital televisions with the different standards can be applied in the encapsulation module of the mobile digital television receiving circuit system, thereby increasing the transplantability and the compatibility of the encapsulation module.
Description
[affiliated technical field]
The utility model relates to a kind of receiving circuit system of Digital Television, relates in particular to a kind of signal that is used to obtain mobile digital TV, carries out the package module of receiving circuit system of demodulation process of the signal of mobile digital TV.
[background technology]
Current, Digital Television is used day by day and is extensively popularized, yet different digital television standards is carried out in different regions, for example, there are standards such as CMMB, DMB-TH, DVB-T, if need to receive different Digital Television, then need develop, thereby cause the repeatability exploitation at different digital television standards, reduce development efficiency, increase development cost.
Independence in view of the Digital Television receiving circuit, therefore, the receiving circuit of mobile digital TV is developed to independent Circuits System, make concurrent development with the circuit main system of receiving terminal for digital television product, be implemented in when selecting the digital TV receiver module of various criterion for use on the Circuits System of same receiving terminal for digital television product, can realize compatible different digital television standards easily, shorten the product design and development cycle, reduce the cost.
Therefore, how to design a kind of reception of Mobile Digital TV Circuits System that the reception of stable digital television signal is provided, be convenient to compatible and be applied in the digital television standard of various criterion, then become current mobile digital TV field institute problem demanding prompt solution.
[utility model content]
The utility model provides a kind of reception of Mobile Digital TV Circuits System package module, and the reception of digital television signal is stable, is convenient to the compliant applications of the Digital Television of various criterion, reduces development cost.
For solving the problems of the technologies described above, the utility model provides a kind of reception of Mobile Digital TV Circuits System package module, comprise printed circuit board (PCB), be packaged in radio-frequency (RF) circuit module, the Digital Television demodulator circuit module of printed circuit board (PCB) and provide radio-frequency (RF) circuit module and the power circuit module of Digital Television demodulator circuit module working power, earthed circuit is set on the printed circuit board (PCB).Earthed circuit comprises ground plane and ground path, electrically connect with via hole between described ground plane and the ground path, and the edge that extends to printed circuit board (PCB) forms system earth point and printed circuit board ground point, and described printed circuit board ground point is connected with the earth terminal of external circuit.
As mentioned above, ground plane and ground path that the via hole of setting of the present utility model connects, the interference signal of the radiofrequency signal of maskable Digital Television guarantees that transfer of data is reliable and stable, reduces noise jamming, realizes stable Digital Television reception.
The stable signal transmission of the reception of Mobile Digital TV Circuits System package module that provides based on the utility model, at different digital television standards, only need the Digital Television radio-frequency module and the Digital Television demodulation module of different digital television standards are applied to/replace radio-frequency (RF) circuit module of the present utility model and Digital Television demodulator circuit module, the signal that can make different digital television standards carry out the corresponding digital TV receives and handles, and provide the transfer of data of stable Digital Television, and then the reduction development cost, the popularization and the industry that help Digital Television are used.
[description of drawings]
Fig. 1 is the encapsulated circuit layout of the utility model reception of Mobile Digital TV Circuits System package module.
Fig. 2 is the layout of the earthed circuit of the utility model reception of Mobile Digital TV Circuits System package module.
Fig. 3 is the end view of the utility model reception of Mobile Digital TV Circuits System package module.
[embodiment]
Reach technological means and the effect that predetermined purpose is taked for further setting forth the utility model, below in conjunction with drawings and Examples, embodiment, architectural feature and effect thereof to the utility model reception of Mobile Digital TV Circuits System package module are described in detail as follows.
The utility model reception of Mobile Digital TV Circuits System package module is used to carry out the reception and the demodulation process of digital television signal, goes for the design of circuit receiving system of the Digital Television of various criterion by the reception of Mobile Digital TV Circuits System package module that the utility model disclosed.
Consult Fig. 1 and Fig. 3, the utility model reception of Mobile Digital TV Circuits System package module comprises printed circuit board (PCB) 10, is arranged at radio-frequency (RF) receiving circuit module 11, Digital Television demodulator circuit module 12, power circuit module and earthed circuit on the printed circuit board (PCB) 10.Wherein, the power circuit module comprises radio-frequency power supply circuit module 13A and demodulation power circuit module 13B, provides working power to radio-frequency (RF) receiving circuit module 11 and Digital Television demodulator circuit module 12 respectively.
The utility model reception of Mobile Digital TV Circuits System package module 1 also comprises the peripheral circuit of the utility model reception of Mobile Digital TV Circuits System, is included as to reduce power supply or electromagnetic interference in signal transmission the filter circuit of being made up of electric capacity and inductance.For reducing of the interference of the outside signal of telecommunication to the new reception of Mobile Digital TV Circuits System package module of this practicality, printed circuit board (PCB) 10 is divided into two zones of first area A, second area B, first area A, second area B are provided with shield shell 14A, 14B respectively, thereby the circuit on the printed circuit board (PCB) 10 all is shielded in shield shell 14A, the 14B, as Fig. 3.
The radio-frequency (RF) circuit module 11 of the utility model reception of Mobile Digital TV circuit module, Digital Television demodulator circuit module 12 and power circuit module 13A, 13B is integrated to be arranged on the printed circuit board (PCB) 10, by selecting the digital television module of various criterion, the digital television signal that can realize different digital television standards receives, for example, adopt DMB-TH, during the DVB-T digital television standard, then can be correspondingly with radio-frequency (RF) circuit module 11, Digital Television demodulator circuit module 12 is selected DMB-TH for use, the radio-frequency (RF) receiving circuit module of DVB-T standard and Digital Television demodulator circuit module.Thereby, only need to select different digital television modules for use at the different digital television standard, can reduce the repeatability exploitation that also needs to carry out again the Circuits System design in the prior art at different digital television standards, make the utility model increase portable and compatible between the different digital television standard, lower development cost.
Consult shown in Figure 2, the utility model reception of Mobile Digital TV Circuits System package module is integrated to be packaged on the printed circuit board (PCB) 10, that is, radio-frequency (RF) receiving circuit module 11, Digital Television demodulator circuit module 12, radio-frequency power supply circuit module 13A and demodulation power circuit module 13B and peripheral circuit all are packaged on the printed circuit board (PCB) 10.Printed circuit board (PCB) 10 adopts the structure of multilayer circuit board, be stable, the reliability of the reception and the processing of the radiofrequency signal that increases Digital Television circuit receiving system of the present utility model, the earthed circuit that the utility model is provided with at printed circuit board (PCB) 10 comprises ground plane M1, M20, the M3 of ground path L1, L2, L3, L4, L5, L6, L7 and many places of the many places of setting.Ground path L1, the L2 that is provided with on the printed circuit board (PCB) 10, L3, L4, L5, L6, L7 extend to first edge of printed circuit board (PCB) 10 and form system earth point P2, P5, P8, P10, P12, ground path extends to form system earth point P16, P19, P24 to second edge of printed circuit board (PCB) 10, and ground plane M1, M2, the M3 of many places are set on printed circuit board (PCB) 10, increase the stability in the signals transmission.Each ground path and system earth are put between the first earth point P2, the second earth point P5, the 3rd earth point P8, the 4th earth point P10, the 5th earth point P12, the 6th earth point P16, the 7th earth point P19 and the 8th earth point P24 respectively, and via hole S1, S2, S3, S4, S5, S6, S7, S8 and other via holes by printed circuit board (PCB) 10 electrically connects.Be the good stable and the signal shielding of the ground signalling that increases printed circuit board (PCB), the 3rd edge of printed circuit board (PCB) 10, the 4th edge adopt the large-area mode of covering the copper coin zone of copper that printed circuit board ground point P25, the P26 that forms rectangular block shape is set respectively.Each ground plane M1, M2, M3 adopt other via holes such as a plurality of via hole H1, H2 to be electrically connected to printed circuit board ground point P25, P26 respectively.After each system earth point P2, P5 of the utility model reception of Mobile Digital TV circuit package system, P8, P10, P12, P16, P19, P24 and each ground plane M1, M2, M3 are electrically connected to shared grounding point by via hole, be connected to the earth terminal of the circuit main system of outside mobile digital TV terminal equipment again by printed circuit board ground point P25, P26.
Signal stabilization for the radio circuit of guaranteeing the utility model reception of Mobile Digital TV Circuits System package module, reliability, as shown in Figure 2, antenna traces zone at the printed circuit board (PCB) 10 of radio-frequency antenna circuit 15 is a circuit idle area 16, promptly, avoid the signal of circuit to disturb, the setting of no circuit-line on the printed circuit board (PCB) 10 of circuit idle area 16, simultaneously, be better shielded signal and electromagnetic interference, location at the antenna traces region adjacent is provided with large-area contact area M4, first edge that radio-frequency antenna circuit 15 extends to printed circuit board (PCB) forms antenna connector P9, and the both sides of this antenna connector P9 are ground path L2, L3 and system earth point P8, P10 makes the signal of antenna connector P9 receive more reliable and stable.
In the specific embodiment of the utility model reception of Mobile Digital TV Circuits System package module, be example only below with the receiving circuit system of the Digital Television of CMMB standard, in order to embodiment of the present utility model to be described, but non-ly be used to limit right category of the present utility model.
In the selection of the components and parts in the specific embodiment of the utility model; CMMB Digital Television demodulation module can select for use Beijing to create firm video signal CMMB demodulation chip IF101; the radio-frequency (RF) receiving circuit of CMMB can be selected ADI radiofrequency receiving chip Tuner MTV102 for use; the power circuit module is selected high efficiency for use; the Richtek power supply chip that output ripple is little; the peripheral circuit of the CMMB reception of Mobile Digital TV Circuits System package module in the specific embodiment; can adopt volume little; high performance crystal oscillator oscillator; the capacitance resistance ware that tolerance is little; and then realize that high performance ESD (Electro-Static Discharge, static discharges) protects.
The radio-frequency (RF) receiving circuit 11 of the utility model reception of Mobile Digital TV Circuits System package module is integrated on the printed circuit board (PCB) 10, not influenced by the high-frequency circuit of other Circuits System of mobile digital TV terminal equipment, in manufacturing process, printed circuit board (PCB) 10 adopts 8 layers of pcb board, the ground path that connects each circuit with via hole technology, ground plane and system earth point and printed circuit board ground point, the structure of 8 layers of pcb board can increase the anti-interference to electronic noise, independently power supply is spread copper, have power supply integrality and signal integrity, reduce power supply and signal and be subjected to external influence, the circuit idle area of radio-frequency antenna circuit is handled, avoiding radiofrequency signal to be subjected to other signals disturbs, improve the sensitivity of radio frequency, antistatic behaviour.
In addition, for the stable and sensitivity of transfer of data that improves CMMB high speed data lines MCS in the present embodiment, MMOSI, MMISO, MSCLK, can adopt the wire laying mode in concentric wiring and short-term path, avoid the circuit of other high-frequency signal circuits contiguous MCS, MMOSI, MMISO, MSCL simultaneously, and these 4 circuits extend to data connection point P20, the P21 of second edge formation of circuit board 10, the both sides of P22, P23 also are system earth point P19, P24, increase the transmission stability of high speed data lines.
For further guaranteeing the signal shielding effect of the CMMB reception of Mobile Digital TV Circuits System package module of present embodiment, reduce outside electromagnetic interference, the A of printed circuit board (PCB) 10, the zone of B adopt metallic shield housing 14A, 14B to carry out electromagnetic interference shield respectively, for example, can select screen iron cover for use.
After the system module circuit of the CMMB digital television standard in the specific embodiment of the receiving circuit system of the utility model mobile digital TV encapsulates, also have the upgrading and the autgmentability of each module, comprising:
1) supports IIC+SPI pattern and only SPI pattern, support fireware down function;
2) firm video signal IF201 scheme is created in compatible Beijing, realizes module upgrade and cost control;
3) compatible siano single-chip solution SMS1180 has good flexibility and extensibility.
The utility model moves the module reception of Mobile Digital TV Circuits System package module adopts the circuit module encapsulation of CMMB digital television standard in specific embodiment after, test is learnt by experiment, air 16KV, contact 8KV, the anti-ESD of its module is good, closed loop is highly sensitive to be reached-98.5dB, and EMI/EMC is effective.
The utility model mobile digital TV circuit receiving circuit system module encapsulation forms independently after the package module, and the pin definitions that extends to form from the edge of printed circuit board (PCB) 10 is as shown in table 1 below:
Table 1:
| P1 | RST | P10 | GND4 | P19 | GND7 |
| P2 | GND1 | P11 | ANT2 | P20 | MCS |
| P3 | M1V2 | P12 | GND5 | P21 | MMOSI |
| P4 | M1V8 | P13 | INT | P22 | MMISO |
| P5 | GND2 | P14 | MVCC | P23 | MSCLK |
| P6 | PWEN | P15 | MVDD | P24 | GND8 |
| P7 | STATUS | P16 | GND6 | P25 | PGND1 |
| P8 | GND3 | P17 | I2CDAT | P26 | PGND2 |
| P9 | ANT1 | P18 | I2CCLK |
Being described as follows shown in the table 2 of pin definitions in the above-mentioned table 1:
| Pin definitions | Explanation | Pin definitions | Explanation |
| RST | Systematic reset signal | MVCC | 3.3V power supply input |
| GND1，GND2，GND3，GND4， GND5，GND6，GND7，GND8 PGND1，PGND2 | Earth signal | MVDD | The battery input pin |
| M1V2 | 1.2V power supply input | I2CDAT | The I2C data wire |
| M1V8 | 1.8V power supply input | I2CCLK | The I2C clock line |
| PWEN | The power enable pin | MCS | The spi bus chip select pin |
| STATUS | The system mode pin | MMOSI | Spi bus MOSI |
| ANT1 | RF signal input 1 | MMISO | Spi bus MISO |
| ANT2 | RF signal input 2 | MSCLK | The spi bus clock |
| INT | Interrupt pin |
As above, the utility model reception of Mobile Digital TV Circuits System package module, the module volume after the encapsulation is little, simple in structure, and the device discharging is in good order, and at interval rationally, manufacturing processing is simple and easy, assembling easily, thermal diffusivity is strong, and conformity of production is controlled, convenient test.
In sum, embodiment of the present utility model is by being integrated into independently reception of Mobile Digital TV system module with the demodulator circuit module 12 of the radio-frequency (RF) circuit module 11 of CMMB, CMMB and radio-frequency power supply circuit module 13A and demodulation power circuit module 13B, adopt many ground paths on the printed circuit board (PCB) 10, and the edge that extends to printed circuit board (PCB) respectively forms the system earth point of many places, and the reception and the demodulation performance of stable, reliable CMMB digital television signal is provided.
In addition, power module of the present utility model adopts radio-frequency power supply module 13A and demodulation power circuit module 13B to power respectively to the structure of radio-frequency (RF) circuit module 11 and demodulator circuit module 12, reduces the interference of each electric power source pair of module transfer of data.The adjacent domain of radio-frequency antenna circuit 15 is a circuit idle area 16, and make antenna connector P9 be provided with between system earth point P8, P10, increase the stability that radiofrequency signal receives, and then make reception of Mobile Digital TV Circuits System package module of the present utility model have stable radiofrequency signal reception and transmission property.
The utility model reception of Mobile Digital TV circuit package system, the receiving circuit and the demodulator circuit that wherein receiving circuit module and demodulator circuit module need be adopted other digital television standards only, can conveniently be applied in the different receiving terminal for digital television equipment, thereby reduce the development cost between the different digital television standards, make things convenient for the transplantability and the compatibility of application of the Digital Television of various criterion, be convenient to utilization and extention.
Claims (12)
1, a kind of reception of Mobile Digital TV Circuits System package module, comprise printed circuit board (PCB), be packaged in the radio-frequency (RF) circuit module on the printed circuit, Digital Television demodulator circuit module and the power circuit module that radio-frequency (RF) circuit module and Digital Television demodulator circuit module working power are provided, earthed circuit is set on the circuit board, it is characterized in that, described earthed circuit comprises ground plane and ground path, electrically connect with via hole between described ground plane and the ground path, and the edge that extends to printed circuit board (PCB) forms system earth point and printed circuit board ground point, and described printed circuit board ground point is connected with the earth terminal of external circuit.
2, reception of Mobile Digital TV Circuits System package module as claimed in claim 1, wherein, described system earth point is positioned at first, second edge of printed circuit board (PCB), and described printed circuit board ground point is positioned at the 3rd, the 4th edge of printed circuit board (PCB).
3, reception of Mobile Digital TV Circuits System package module as claimed in claim 2, wherein, described printed circuit board ground point is the copper coin zone of covering the rectangle of process for copper formation.
4, reception of Mobile Digital TV Circuits System package module as claimed in claim 2, wherein, described system earth point comprises first earth point, second earth point, the 3rd earth point, the 4th earth point, the 5th earth point, the 6th earth point, the 7th earth point and the 8th earth point, described first earth point, second earth point, the 3rd earth point, the 4th earth point, the 5th earth point are positioned at first edge of circuit board, and described the 6th earth point, the 7th earth point and the 8th earth point are positioned at second edge of circuit board.
5, reception of Mobile Digital TV Circuits System package module as claimed in claim 4, wherein, the vacant district of circuit is set on the described printed circuit board (PCB), the radio-frequency antenna circuit of described radio-frequency (RF) circuit module is arranged at the vacant district of circuit of printed circuit board (PCB), and the edge that described radio-frequency antenna circuit extends to printed circuit board (PCB) forms RF connection points.
6, reception of Mobile Digital TV Circuits System package module as claimed in claim 5, wherein, described RF connection points is between the 3rd earth point and the 4th earth point.
7, reception of Mobile Digital TV Circuits System package module as claimed in claim 5, it is characterized in that the data connection point that second edge that the spi bus sheet of described Digital Television demodulator circuit module selects data wire, spi bus MOSI data wire, spi bus MISO data wire, spi bus clock line to extend to printed circuit board (PCB) respectively forms is between described the 7th earth point, the 8th earth point.
8, reception of Mobile Digital TV Circuits System package module as claimed in claim 1, wherein, described power circuit module comprises the radio-frequency power supply circuit module and the demodulation power circuit module of the working power that radio-frequency (RF) circuit module and Digital Television demodulator circuit module are provided respectively.
9, as the described reception of Mobile Digital TV Circuits System of each claim of claim 1-8 package module, wherein, described printed circuit board (PCB) comprises first, second zone, described radio-frequency (RF) circuit module and radio-frequency power supply module are positioned at the first area of printed circuit board (PCB), and described Digital Television demodulator circuit module and demodulation power module are positioned at the second area of circuit board.
10, reception of Mobile Digital TV Circuits System package module as claimed in claim 9 wherein, also comprises first, second shield shell, and described first, second shield shell coats described first area and second area respectively.
11, reception of Mobile Digital TV Circuits System package module as claimed in claim 1, wherein, described Digital Television demodulator circuit module is a CMMB Digital Television demodulator circuit module, described radio-frequency (RF) circuit module is the CMMB radio-frequency (RF) circuit module.
12, reception of Mobile Digital TV Circuits System package module as claimed in claim 1, wherein, the vacant district of circuit is set on the described printed circuit board (PCB), the radio-frequency antenna circuit of described radio-frequency (RF) circuit module is arranged at the vacant district of circuit of printed circuit board (PCB), and the edge that described radio-frequency antenna circuit extends to printed circuit board (PCB) forms RF connection points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201049221U CN201352829Y (en) | 2009-01-08 | 2009-01-08 | Encapsulation module of mobile digital television receiving circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201049221U CN201352829Y (en) | 2009-01-08 | 2009-01-08 | Encapsulation module of mobile digital television receiving circuit system |
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| Publication Number | Publication Date |
|---|---|
| CN201352829Y true CN201352829Y (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201049221U Expired - Fee Related CN201352829Y (en) | 2009-01-08 | 2009-01-08 | Encapsulation module of mobile digital television receiving circuit system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497217A (en) * | 2011-11-28 | 2012-06-13 | 北京乾图方园软件技术有限公司 | Method for enhancing receiving signal of China mobile multimedia broadcasting (CMMB) chip |
-
2009
- 2009-01-08 CN CNU2009201049221U patent/CN201352829Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497217A (en) * | 2011-11-28 | 2012-06-13 | 北京乾图方园软件技术有限公司 | Method for enhancing receiving signal of China mobile multimedia broadcasting (CMMB) chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20150108 |
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| EXPY | Termination of patent right or utility model |