CN204362237U - ISDB-T digital television module and the main frame that Digital Television can be play - Google Patents
ISDB-T digital television module and the main frame that Digital Television can be play Download PDFInfo
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- CN204362237U CN204362237U CN201420745423.1U CN201420745423U CN204362237U CN 204362237 U CN204362237 U CN 204362237U CN 201420745423 U CN201420745423 U CN 201420745423U CN 204362237 U CN204362237 U CN 204362237U
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- digital television
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Abstract
The utility model discloses a kind of ISDB-T digital television module and the main frame that Digital Television can be play.ISDB-T digital television module comprises filter circuit, decoding circuit and SDIO interface, and decoding circuit comprises decoding chip and peripheral circuit thereof; The output of the input termination filter circuit of decoding chip, the output termination SDIO interface of decoding chip, filter circuit, decoding circuit and SDIO Interface integration are on one piece of circuit board.Main frame comprises antenna, mainboard and ISDB-T digital television module; The output termination antenna-matching circuit of antenna, the filter circuit of the output termination ISDB-T digital television module of antenna-matching circuit; The SDIO interface of ISDB-T digital television module connects mainboard.ISDB-T digital television module of the present utility model is in use without the need to professional again placement-and-routing and debug circuit again, and cost of labor is lower, stable performance.
Description
[technical field]
The utility model relates to Digital Television, particularly relates to a kind of ISDB-T digital television module and the main frame can playing Digital Television.
[background technology]
ISDB-T digital television module can support wave band: UHF 470-862MHz, accessible site all can the smart mobile phone of decoded video signal, panel computer, under operating system on desktop PC platform, the digital television function of spread demodulation ISDB-T standard.Traditional ISDB-T digital television module uses discrete component, and each project application all needs professional placement-and-routing and again debugging again, can not ensure the consistency of signal, cause cost of labor to rise and properties of product instability.
[summary of the invention]
The technical problems to be solved in the utility model is to provide that a kind of cost of labor is lower, the ISDB-T digital television module of stable performance.
Another technical problem that will solve of the utility model is to provide that a kind of ISDB-T digital television module cost is lower, the main frame can playing Digital Television of stable performance.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of ISDB-T digital television module, and comprise filter circuit, decoding circuit and SDIO interface, decoding circuit comprises decoding chip and peripheral circuit thereof; The output of the input termination filter circuit of decoding chip, the output termination SDIO interface of decoding chip, filter circuit, decoding circuit and SDIO Interface integration are on one piece of circuit board.
Above-described ISDB-T digital television module, described filter circuit comprises the first filter circuit and the second filter circuit; First filter circuit is by the first capacitance external antenna match circuit; First filter circuit connects the second filter circuit by the second capacitance; Second filter circuit connects the first end of the 3rd capacitance, the signal input part of the second termination decoding chip of the 3rd capacitance.
Above-described ISDB-T digital television module, the first filter circuit comprises the first inductance, termination first capacitance of the first inductance and the tie point of the second capacitance, other end ground connection; Second filter circuit comprises the second inductance, the 3rd inductance, the 4th inductance, the first electric capacity and the second electric capacity, the second inductance connect with the 3rd inductance after termination second capacitance, another termination the 3rd capacitance; After 4th inductance and the first capacitances in series, the tie point of termination second inductance and the 3rd inductance, other end ground connection; The first end of one termination the 3rd capacitance of the second electric capacity, other end ground connection.
Above-described ISDB-T digital television module, described decoding chip is SMS3130, and the A6 pin of decoding chip connects the output of filter circuit; The C5 pin ground connection of decoding chip, E4 and D5 pin connects host chip power supply, and C1 pin connects host chip power supply.
Above-described ISDB-T digital television module, A1, A2, E2, B1, F1 and E1 pin of decoding chip connects SDIO interface CMD pin, Data3 pin, Data2 pin, Data1 pin, Data0 pin and CLK pin respectively.
A main frame for Digital Television can be play, comprise antenna, mainboard and above-mentioned ISDB-T digital television module; The output termination antenna-matching circuit of antenna, the filter circuit of the output termination ISDB-T digital television module of antenna-matching circuit; The SDIO interface of ISDB-T digital television module connects mainboard.
Above-described main frame, antenna-matching circuit comprises antennal interface, TVS diode, the 5th inductance, the 3rd electric capacity and the 4th electric capacity; The negative electrode of TVS diode connects antennal interface, plus earth; The negative electrode of the first termination TVS diode of the 5th inductance, the output of the second termination antenna-matching circuit; The first end of one termination the 5th inductance of the 3rd electric capacity, other end ground connection; Second end of one termination the 5th inductance of the 4th electric capacity, other end ground connection.
ISDB-T digital television module of the present utility model is in use without the need to professional again placement-and-routing and debug circuit again, and cost of labor is lower, stable performance.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the schematic diagram of the utility model example I SDB-T digital television module.
Fig. 2 is the theory diagram of the utility model embodiment main frame.
Fig. 3 is the schematic diagram of the utility model embodiment antenna-matching circuit.
[embodiment]
The ISDB-T digital television module of the utility model embodiment comprises filter circuit, decoding circuit and SDIO interface, and decoding circuit comprises decoding chip SMS3130 and peripheral circuit thereof.The output of the input termination filter circuit of decoding chip SMS3130, the output termination SDIO interface of decoding chip SMS3130, filter circuit, decoding circuit and SDIO Interface integration are on one piece of circuit board.
Filter circuit comprises the first filter circuit and the second filter circuit.First filter circuit is by capacitance C15 external antenna match circuit.First filter circuit connects the second filter circuit by capacitance C16.Second filter circuit connects the first end of capacitance C17, the signal input part (UHF pin) of the second termination decoding chip SMS3130 of capacitance C17.
First filter circuit comprises inductance L 6, a termination capacitance C15 of inductance L 6 and the tie point of capacitance C16, other end ground connection.Second filter circuit comprises inductance L 7, inductance L 8, inductance L 5, electric capacity C19 and electric capacity C18, inductance L 7 connect with inductance L 8 after a termination capacitance C16, another termination capacitance C17.After inductance L 5 and electric capacity C19 connect, the tie point of a termination inductance L 7 and inductance L 8, other end ground connection.The first end of the one termination capacitance C17 of electric capacity C18, other end ground connection.
Function and the pin wiring of decoding chip SMS3130 are described as follows:
A6 pin: the radio wave input of uhf band, is connected with the capacitance C17 of filter circuit.
C6, D6 pin: connect external crystal-controlled oscillation, external crystal-controlled oscillation is made up of X2 (quartz shake crystalline substance), C20+C21 (matching capacitance); Export with D6 pin and open the signal that shakes to external crystal-controlled oscillation, access C6 pin in the 12Mhz frequency by external crystal-controlled oscillation stable output.
F2 pin: external reset signal inputs, and is provided by main frame, low level resets.
A4 pin: the external resistance to earth R4 of chip internal demodulator.
B3 pin: chip internal LDO (voltage adjuster) external delay capacitor C22 over the ground.
F5 pin: the external filter capacitor C23 of chip internal ADC sample circuit over the ground.
F4 pin: the external filter capacitor C24 of chip internal ADC sample circuit over the ground.
C5, E4, D5 pin: the interface modes that chip and main-machine communication are set; The present embodiment only uses SDIO interface modes, thus be configured to C5 pin ground connection, E4 and D5 pin meets the chip power DTV_VCCIO that main frame provides.
E5, D4 pin: chip internal PLL (phase-locked loop) crystal oscillator frequency is set; The present embodiment selects 12Mhz, so E5, D4 pin all ground connection.
F3, A5, B6, E6 pin: grounding leg
C2 pin: universal input output pin, external resistance to earth, can when overhauling to state, and convenient for maintaining is used.
A1, A2, E2, B1, F1, E1 pin: SDIO interface communication pin, connects SDIO interface respectively.The corresponding CMD (order) of A1 pin, the corresponding Data3 (data bit 3) of A2 pin, the corresponding Data2 (data bit 2) of E2 pin, the corresponding Data1 (data bit 1) of B1 pin, the corresponding Data0 (data bit 0) of F1 pin, the corresponding CLK (clock) of E1 pin.
A3 pin: chip internal demodulator is powered pin, meets DTV_1V2 (the 1.2V level that mainboard provides).
F6 pin: chip internal ADC (mould/number) powers pin, meets DTV_1V2 (the 1.2V level that mainboard provides) through inductance FB2, and inductance FB2 is used for isolation ADC and core digital circuit power and DTV_1V2.
D1 pin: chip core supplying digital circuits pin, meets DTV_1V2 (the 1.2V level that mainboard provides) through inductance FB2.
C1 pin: chip interface (I/O port) is powered pin, and meet the chip power DTV_VCCIO that main frame provides, object is powered consistent with host interface (I/O port), consistent with level during main-machine communication in order to solve chip.
As shown in Figure 2, the main frame can playing Digital Television of the utility model embodiment, comprises antenna, digital television module, mainboard, and above-mentioned ISDB-T digital television module.The output termination antenna-matching circuit of antenna, the filter circuit of the output termination ISDB-T digital television module of antenna-matching circuit.The SDIO interface of ISDB-T digital television module connects mainboard.
Wherein, antenna-matching circuit comprises antennal interface J2, TVS diode, inductance L W1, the 3rd electric capacity and the 4th electric capacity.The negative electrode of TVS diode connects 1 pin of antennal interface J2, plus earth.The negative electrode of the first termination TVS diode of inductance L W1, the output of the second termination antenna-matching circuit.The first end of the one termination inductance L W1 of electric capacity CW5, other end ground connection.Second end of the one termination inductance L W1 of electric capacity CW4, other end ground connection.
The course of work of the utility model embodiment main frame is as follows: the filter being entered discrete component composition by antenna reception atmospheric radio waves signal through antenna-matching circuit, then send into decoding chip demodulation and export MPEG2-TS code stream, MPEG2-TS code stream is sent to mainboard through SDIO interface, and mainboard shows after receiving MPEG2-TS code stream decoding on the screen of main frame.
The above embodiment of the utility model has following advantage:
1. time to market (TTM) can be shortened;
2. when developing new projects without the need to RF professional again placement-and-routing and debug circuit parameters again, thus simplify, user is without the need to spending the too many time on these circuits;
3. arbitrarily can change other functional modules of same package external form.
Claims (7)
1. an ISDB-T digital television module, comprises filter circuit and decoding circuit, it is characterized in that, comprises SDIO interface, and decoding circuit comprises decoding chip and peripheral circuit thereof; The output of the input termination filter circuit of decoding chip, the output termination SDIO interface of decoding chip, filter circuit, decoding circuit and SDIO Interface integration are on one piece of circuit board.
2. ISDB-T digital television module according to claim 1, is characterized in that, described filter circuit comprises the first filter circuit and the second filter circuit; First filter circuit is by the first capacitance external antenna match circuit; First filter circuit connects the second filter circuit by the second capacitance; Second filter circuit connects the first end of the 3rd capacitance, the signal input part of the second termination decoding chip of the 3rd capacitance.
3. ISDB-T digital television module according to claim 2, is characterized in that, the first filter circuit comprises the first inductance, termination first capacitance of the first inductance and the tie point of the second capacitance, other end ground connection; Second filter circuit comprises the second inductance, the 3rd inductance, the 4th inductance, the first electric capacity and the second electric capacity, the second inductance connect with the 3rd inductance after termination second capacitance, another termination the 3rd capacitance; After 4th inductance and the first capacitances in series, the tie point of termination second inductance and the 3rd inductance, other end ground connection; The first end of one termination the 3rd capacitance of the second electric capacity, other end ground connection.
4. ISDB-T digital television module according to claim 1, is characterized in that, described decoding chip is SMS3130, and the A6 pin of decoding chip connects the output of filter circuit; The C5 pin ground connection of decoding chip, E4 and D5 pin connects host chip power supply, and C1 pin connects host chip power supply.
5. ISDB-T digital television module according to claim 4, is characterized in that, A1, A2, E2, B1, F1 and E1 pin of decoding chip connects SDIO interface CMD pin, Data3 pin, Data2 pin, Data1 pin, Data0 pin and CLK pin respectively.
6. can play a main frame for Digital Television, comprise antenna, antenna-matching circuit, digital television module and mainboard, it is characterized in that, described antenna-matching circuit is the ISDB-T digital television module in claim 1 to 5 described in arbitrary claim; The output termination antenna-matching circuit of antenna, the filter circuit of the output termination ISDB-T digital television module of antenna-matching circuit; The SDIO interface of ISDB-T digital television module connects mainboard.
7. main frame according to claim 6, is characterized in that, antenna-matching circuit comprises antennal interface, TVS diode, the 5th inductance, the 3rd electric capacity and the 4th electric capacity; The negative electrode of TVS diode connects antennal interface, plus earth; The negative electrode of the first termination TVS diode of the 5th inductance, the output of the second termination antenna-matching circuit; The first end of one termination the 5th inductance of the 3rd electric capacity, other end ground connection; Second end of one termination the 5th inductance of the 4th electric capacity, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745423.1U CN204362237U (en) | 2014-12-02 | 2014-12-02 | ISDB-T digital television module and the main frame that Digital Television can be play |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745423.1U CN204362237U (en) | 2014-12-02 | 2014-12-02 | ISDB-T digital television module and the main frame that Digital Television can be play |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204362237U true CN204362237U (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420745423.1U Expired - Fee Related CN204362237U (en) | 2014-12-02 | 2014-12-02 | ISDB-T digital television module and the main frame that Digital Television can be play |
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| Country | Link |
|---|---|
| CN (1) | CN204362237U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018099343A1 (en) * | 2016-11-30 | 2018-06-07 | 井冈山电器有限公司 | Signal processing method and apparatus |
| CN109872674A (en) * | 2019-04-16 | 2019-06-11 | 上海奉先电子科技有限公司 | A kind of display system and driving configuration method |
-
2014
- 2014-12-02 CN CN201420745423.1U patent/CN204362237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018099343A1 (en) * | 2016-11-30 | 2018-06-07 | 井冈山电器有限公司 | Signal processing method and apparatus |
| CN109872674A (en) * | 2019-04-16 | 2019-06-11 | 上海奉先电子科技有限公司 | A kind of display system and driving configuration method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20191202 |