CN201426143Y - Video and audio signal processing system - Google Patents
Video and audio signal processing system Download PDFInfo
- Publication number
- CN201426143Y CN201426143Y CN2009201522291U CN200920152229U CN201426143Y CN 201426143 Y CN201426143 Y CN 201426143Y CN 2009201522291 U CN2009201522291 U CN 2009201522291U CN 200920152229 U CN200920152229 U CN 200920152229U CN 201426143 Y CN201426143 Y CN 201426143Y
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- tua6039
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- radio frequency
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Abstract
The utility model discloses a video and audio signal processing system, which comprises a radio frequency switch circuit and an amplifier circuit, wherein the radio frequency switch circuit and the amplifier circuit are both connected with a radio frequency input end. The radio frequency switch circuit and the amplifier circuit are connected to a coupling amplifier circuit, the coupling amplifiercircuit is connected with an MOPLL tuner TUA6039, a TUA6039 chip is connected with a medium-frequency amplifying chip MOPLL TDA9886 after being connected with a filter circuit, the TUA6039 chip is further connected with a local oscillator circuit and a 12C bus, and the filter circuit comprises filters including X7251D, K3970 and K9659. Radio frequency signals are coupled and amplified after beinginputted, and then sequentially enter the TUA6039 chip and the TDA9886 chip to be processed, thereby increasing digital flexibility greatly.
Description
Technical field
The utility model relates to a kind of system that the video/audio signal of digital television or LCD is handled.
Background technology
The unusual huge and resource of ripe gradually along with broadband network technology, the particularly amount of information that broadband network provided can be shared, so the customer group of broadband network grows with each passing day.And mostly most contents that people are made earnest efforts in broadband networks are the multimedia video resource, and audio-visual resource then relates to the conversion between input and output, digital video signal and the analog video signal of vision signal and audio signal and the reception of hybrid analog-digital simulation/digital television signal in the broadcast on digital television or the LCD.
Existing a kind of video-audio signal treatment system, based on digital if technology, utilize General Porcess Unit, video/audio signal is handled, its processing unit mainly adopts 6034 integrated circuits and 7796 chips, analog intermediate frequency signal IF carries out the digital intermediate frequency signal DIF that exports behind the high sampling, can only reach 79-80dB, to the sensitivity of digital signal not enough.
The utility model content
The purpose of this utility model is to overcome the above-mentioned weak point of existing product, the video-audio signal treatment system that provides a kind of sensitivity to be improved.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of video-audio signal treatment system, comprise the radio-frequency switch circuit and the amplifying circuit that are connected with rf inputs, described radio-frequency switch circuit and amplifying circuit are connected to the coupling amplifying circuit, the coupling amplifying circuit is connected with MOPLL tuner TUA6039, be connected with intermediate frequency amplification chip MOPLL TDA9886 after connecting filter circuit on the TUA6039 chip, also be connected with local oscillation circuit and I2C bus on the described TUA6039 chip.
Described filter circuit comprises filter X7251D, K3970 and K9659.
The beneficial effects of the utility model are: amplification is coupled after the radiofrequency signal input, enter the TUA6039 chip successively then and the TDA9886 chip is handled, because the TUA6039 chip merges complete RF (radio frequency) and IF (intermediate frequency) function on one chip, and advance to have reduced input voltage by integrated internal voltage regulator, the signal that while obtains after intermediate frequency amplifies chip TDA9886 processing, digital sensitivity improves greatly.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
With reference to shown in Figure 1, a kind of video-audio signal treatment system, based on digital if technology, utilize General Porcess Unit, comprise the radio-frequency switch circuit 1 and the amplifying circuit 2 that are connected with rf inputs, described radio-frequency switch circuit 1 and amplifying circuit 2 are connected to coupling amplifying circuit 3, described coupling amplifying circuit 3 is connected with MOPLL tuner TUA6039, be connected with intermediate frequency amplification chip MOPLL TDA9886 after connecting filter circuit 6 on the TUA6039 chip, also be connected with local oscillation circuit 4 and I2C bus 5 on the described TUA6039 chip, described filter circuit 6 comprises SAW (Surface Acoustic Wave) filter X7251D, K3970 and K9659, described intermediate frequency amplifies chip TDA9886 connection output CVBS, Audio and 2nd IF, described tuner TUA6039 also are connected with digital intermediate frequency signal DIF output and IF AGC.During the utility model work, the ANT radiofrequency signal inputs to radio-frequency switch circuit 1 and amplifying circuit 2, enter the amplification that is coupled of coupling amplifying circuit 3 then, enter the TUA6039 chip successively then and the TDA9886 chip is handled, because the TUA6039 chip merges complete RF (radio frequency) and IF (intermediate frequency) function on one chip, and advance to have reduced input voltage by integrated internal voltage regulator, the signal that while obtains after intermediate frequency amplifies chip TDA9886 processing, digital sensitivity improves greatly.
The foregoing description is illustrative principle of the present utility model and effect thereof only; and the embodiment of part utilization; for the person of ordinary skill of the art; under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (2)
1, a kind of video-audio signal treatment system, it is characterized in that: comprise the radio-frequency switch circuit (1) and the amplifying circuit (2) that are connected with rf inputs, described radio-frequency switch circuit (1) and amplifying circuit (2) are connected to coupling amplifying circuit (3), coupling amplifying circuit (3) is connected with MOPLL tuner TUA6039, connect filter circuit (6) on the TUA6039 chip and be connected with intermediate frequency amplification chip MOPLL TDA9886 afterwards, also be connected with local oscillation circuit (4) and I2C bus (5) on the described TUA6039 chip.
2, a kind of video-audio signal treatment system according to claim 1 is characterized in that, described filter circuit (6) comprises filter X7251D, K3970 and K9659.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201522291U CN201426143Y (en) | 2009-04-29 | 2009-04-29 | Video and audio signal processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201522291U CN201426143Y (en) | 2009-04-29 | 2009-04-29 | Video and audio signal processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201426143Y true CN201426143Y (en) | 2010-03-17 |
Family
ID=42025599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201522291U Expired - Fee Related CN201426143Y (en) | 2009-04-29 | 2009-04-29 | Video and audio signal processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201426143Y (en) |
-
2009
- 2009-04-29 CN CN2009201522291U patent/CN201426143Y/en not_active Expired - Fee Related
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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: 20100317 Termination date: 20110429 |