CN2790071Y - Television assembly - Google Patents
Television assembly Download PDFInfo
- Publication number
- CN2790071Y CN2790071Y CNU2005200787422U CN200520078742U CN2790071Y CN 2790071 Y CN2790071 Y CN 2790071Y CN U2005200787422 U CNU2005200787422 U CN U2005200787422U CN 200520078742 U CN200520078742 U CN 200520078742U CN 2790071 Y CN2790071 Y CN 2790071Y
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- unit
- intermediate frequency
- electronic tuner
- utility
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Abstract
The utility model relates to a television component. A printed circuit board is arranged in the shell of the utility model (1), and the shell (1) is provided with a signal input port (2) and a plurality of output ports (3); the printed circuit board is provided with a high frequency electronic tuner unit, an intermediate frequency processing and decoding unit and a CPU microprocessor unit, the signal input port (2) is connected with the input end of the high frequency electronic tuner unit, and the output end of the high frequency electronic tuner unit is connected with the input end of the intermediate frequency processing and decoding unit; the intermediate frequency processing and decoding unit is connected with the CPU microprocessor unit respectively through a bus and a control wire, the high frequency electronic tuner unit is connected with the CPU microprocessor unit through a signal control wire, and the output ends of the intermediate frequency processing and decoding unit are connected with the output ports (3). The utility model integrates all small signal circuits of a common television into a module, so that the anti-interference ability of the utility model is improved, and the cost of the whole machine is reduced. The utility model is suitable for existing three color television systems and five accompanying sound systems.
Description
Technical field
The utility model relates to a kind of television unit, is that a kind of color television set signal receives and processing module.
Background technology
Original image (PIF) and sound accompaniment (SIF) multi-modulation scheme intermediate frequency process and demodulating unit, colour decoding and Video processing (Chroma, Luma) unit, a row oscillating circuit, CPU microprocessor, EEPROM and high-frequency tuner unit etc. all are arranged on the motherboard in the ordinary color tv set, and use resolution element, there is the production process complexity, inconvenient debugging, shortcomings such as production cost height.
Summary of the invention
Technical problem to be solved in the utility model: design a kind of television unit, be a kind of novel whole set of television auxiliary products, integrated original image (PIF) and sound accompaniment (SIF) multi-modulation scheme intermediate frequency process and demodulating unit, colour decoding and Video processing (Chroma, Luma) unit, a row oscillating circuit, CPU microprocessor, EEPROM etc. in the ordinary color tv set constitute a complete TV small-signal with the high-frequency tuner unit and handle and control assembly.
Technical solution of the present utility model: a kind of television unit, comprise housing (1), housing is provided with printed circuit board in (1), housing (1) is provided with a signal input port (2), a plurality of output ports (3), printed circuit board is provided with the high-frequency electronic tuner unit, intermediate frequency process and decoding unit and CPU microprocessor unit, signal input port (2) connects the input of high-frequency electronic tuner unit, the output termination intermediate frequency process of high-frequency electronic tuner unit and the input of decoding unit, intermediate frequency process links to each other with the CPU microprocessor unit with signal control line by bus respectively with decoding unit, the high-frequency electronic tuner unit links to each other with the CPU microprocessor unit by signal control line, and the output of intermediate frequency process and decoding unit is connected output port (3).
The high-frequency electronic tuner unit adopts TDA6509ATT or TDA6509TT frequency synthesis special chip, intermediate frequency process and decoding unit adopt STV2238H or STV2237H chip, and the CPU microprocessor unit adopts the ST ST92T195 of company chip or the S3F880A of Samsung chip.
Advantage that the utility model compared with prior art has and effect:
1. this product has improved the complete machine performance: all small signal circuits in the television set are integrated into a module, shield with metalwork, reduced the interference of electromagnetic field that circuit such as Switching Power Supply, row field excitation produce; Different small signal functions circuit can be isolated with hardware, reduce crosstalking between each circuit; Lead-in wire shortens between each functional circuit, and compact in design has improved antijamming capability.Test result shows that complete machine is made an uproar more than the limit sensitivity raising 3dB, and EMC (electromagnetic compatibility) performance reaches European market access requirement, satisfies the requirement of Green Product.
2. this product has reduced the complete machine cost: though total component number and price reduce not quite, because the television unit product adopts SMD (surface mount) element in a large number, reduced product size; Use the machine paster, improved labor productivity greatly, for complete system plant has reduced the artificial production cost of Denging; Assembling and welding quality improve greatly, have improved reliability of products, have reduced the expense of after-sale service work.
3. this product meets the development trend of general television set: the commanding elevation of TV industry is undoubtedly various high-end products, but the low-end product the when bulk article and the source of profit but still are 21-29.The utility model has been complied with this industry rule just, bears the part work of complete system plant, adopts the automated production flow process, has improved properties of product price ratio from the angle of complete machine.Adopt blocking, modularized design simultaneously, the standardization electric interfaces, therefore, the function of common complete machine has been expanded in the unit such as VCD, DVD and satellite reception of can packing in the complete machine.
4, this product has comprised whole small-signal processing capacities, microprocessor controlled function and the control program memory function in the original whole set of television.It handles the TV signal that receives, and outputs to look with the form of RGB three primary colors and puts plate to promote picture tube.Product has possessed the principal character of whole set of television.Be that the television unit product adds power supply, row field excitation and picture tube, just can constitute the common TV complete machine.
5, this product is applicable to existing three kinds of colour TV standards and five kinds of sound accompaniment standards.Have multilingual and show, the people of being convenient to different regions use.
Description of drawings
Fig. 1 is a structural representation of the present utility model,
Fig. 2 is a circuit block diagram of the present utility model,
Fig. 3 is the circuit block diagram of a kind of embodiment of the utility model,
Fig. 4 Fig. 5 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
1,2,3,4 a kind of embodiment of the present utility model is described in conjunction with the accompanying drawings.
A kind of television unit, comprise housing (1), housing is provided with printed circuit board in (1), housing (1) is provided with a signal input port (2), a plurality of output ports (3), printed circuit board is provided with the frequency synthesis tuner unit, intermediate frequency process and decoding unit and CPU microprocessor unit, signal input port (2) connects the input of high-frequency electronic tuner unit, the output termination intermediate frequency process of high-frequency electronic tuner unit and the input of decoding unit, intermediate frequency process links to each other with the CPU microprocessor unit with signal control line by bus respectively with decoding unit, the high-frequency electronic tuner unit links to each other with the CPU microprocessor unit by signal control line, and the output of intermediate frequency process and decoding unit is connected output port (3).
The high-frequency electronic tuner unit adopts TDA6509TT or frequency synthesis special chip, and the radio television signal that receives is carried out tuning amplification, mixing, converts fixing medium-frequency TV signal to; Intermediate frequency process and decoding unit adopt STV2238H or special chip, intermediate-freuqncy signal is carried out image, the accurate separation of sound accompaniment, carry out surface acoustic wave filtering, AGC amplification, video detection and sound accompaniment frequency discrimination respectively, vision signal enters decoding circuit after separated in synchronization, carry out colour decoding, matrixing is exported the RGB three primary colors at last and is put plate promotion picture tube to looking; The CPU microprocessor unit adopts the ST92T195 chip, and mainly action is controlled to complete machine, comprises switching on and shutting down, S-SYSTEM and the selection of sound accompaniment standard, frequency tuning and channel selection, image adjustment, and various function selecting.
The mounting means of the utility model and complete machine motherboard is a vertical structure, to save the space; Contact pin adopts double 60 pins to bend formula, pin spacing size 2.54mm, row's spacing dimension 5.08mm.Used 49 pins at present,, can increase at any time according to product needed from now on.
The utility model decoding chip and CPU are the pyrotoxins of two maximums in the product, and particularly the decoding chip power consumption is about 1300mW, so PCB arranges and must consider this emphasis during structural design.Except electricity accent, decoding chip, CPU three part trisections are placed, to the decoding chip specialized designs heating panel and ventilation window, near CPU, designed the heat radiation circular hole again.
Consider the existing radio frequency of assembly, intermediate frequency and audio-video signal, a row vibration comprises I again
2The C control signal.Will carry out that physical isolation is unrealistic completely to them, the utility model is set up earth point according to its propagating characteristic in the place that interference signal is mixed and disorderly and strong, the signal area that needs are laid special stress on protecting carry out lframe cross piece from.Simultaneously, three of product parts place independent zone respectively.Can prevent effectively that like this stop signal harasses.
Claims (2)
1, a kind of television unit, comprise housing (1), housing is provided with printed circuit board in (1), housing (1) is provided with a signal input port (2), a plurality of output ports (3), it is characterized in that: printed circuit board is provided with the high-frequency electronic tuner unit, intermediate frequency process and decoding unit and CPU microprocessor unit, signal input port (2) connects the input of high-frequency electronic tuner unit, the output termination intermediate frequency process of high-frequency electronic tuner unit and the input of decoding unit, intermediate frequency process links to each other with the CPU microprocessor unit with signal control line by bus respectively with decoding unit, the high-frequency electronic tuner unit links to each other with the CPU microprocessor unit by signal control line, and the output of intermediate frequency process and decoding unit is connected output port (3).
2, television unit according to claim 1, it is characterized in that: the high-frequency electronic tuner unit adopts TDA6509ATT or TDA6509TT frequency synthesis special chip, intermediate frequency process and decoding unit adopt STV2238H or STV2237H special chip, and the CPU microprocessor unit adopts ST92T195 chip or S3F880A chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200787422U CN2790071Y (en) | 2005-04-27 | 2005-04-27 | Television assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200787422U CN2790071Y (en) | 2005-04-27 | 2005-04-27 | Television assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2790071Y true CN2790071Y (en) | 2006-06-21 |
Family
ID=36790404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200787422U Expired - Fee Related CN2790071Y (en) | 2005-04-27 | 2005-04-27 | Television assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2790071Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505387B (en) * | 2008-12-02 | 2013-04-17 | 北京中星微电子有限公司 | Audio mode identification circuit and audio mode identification method |
-
2005
- 2005-04-27 CN CNU2005200787422U patent/CN2790071Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505387B (en) * | 2008-12-02 | 2013-04-17 | 北京中星微电子有限公司 | Audio mode identification circuit and audio mode identification method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 Termination date: 20110427 |