CN2807658Y - Medium frequency amplifier module used for digital high-definition television - Google Patents
Medium frequency amplifier module used for digital high-definition television Download PDFInfo
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- CN2807658Y CN2807658Y CN 200520079034 CN200520079034U CN2807658Y CN 2807658 Y CN2807658 Y CN 2807658Y CN 200520079034 CN200520079034 CN 200520079034 CN 200520079034 U CN200520079034 U CN 200520079034U CN 2807658 Y CN2807658 Y CN 2807658Y
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- circuit
- effect processing
- sound effect
- processing circuit
- medium frequency
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Abstract
The utility model relates to a medium frequency amplifier module used for a digital television with high definition, which is composed of a medium frequency amplifier demodulating circuit, a sound effect processing circuit and a logic switching circuit, wherein the signal end of the medium frequency amplifier demodulating circuit is connected with medium frequency television signals, and the switch end is connected with the switch end of the sound effect processing circuit. The audio signal output end of the medium frequency amplifier demodulating circuit is connected with the audio signal input end of the sound effect processing circuit, and the image signal output end is connected with the image signal input end of a digital decoding circuit. The control end of the logic switching circuit is connected with the control end of the sound effect processing circuit. The utility model can process accompanying sound signals while demodulating image signals, and can respectively control stress, bass, stereo, etc., and the product meets the requirements for miniaturization and environmental protection. The image quality and the accompanying sound processing of the digital television with high definition reach relatively high level.
Description
Technical field
The utility model relates to amplification module in a kind of digital HDTV (High-Definition Television) usefulness.
Background technology
Put processing capacity and audio processing capacity at present in the television set and adopt the mode of separating treatment mostly.Can only be applied to simulate high definition, large-screen multifunctional colour television set, and product function is single, the external form volume is big, does not realize European environmental protection standard requirement.
Summary of the invention
Technical problem to be solved in the utility model: design amplification module in a kind of digital HDTV (High-Definition Television) usefulness, in the time of can be to the picture intelligence demodulation audio signal be handled, make stress, bass, stereo etc. can control respectively, product satisfies the requirement of miniaturization and environment-friendly type.
Technical solution of the present utility model: amplification module during a kind of digital HDTV (High-Definition Television) is used, by in put demodulator circuit, sound effect processing circuit and logic switching circuit and form, in put the signal termination medium-frequency TV signal of demodulator circuit, the switch terminals of switch termination sound effect processing circuit, audio signal output end connects the audio signal input end of sound effect processing circuit, image signal output end connects digital decoding circuit image signal input part, the control end of the control termination sound effect processing circuit of logic switching circuit.
In put demodulator circuit and be provided with two switch terminals, connect two switch terminals of sound effect processing circuit respectively.
In put demodulator circuit and also be provided with the AGC output port, AFC output port and the sound accompaniment output port that is untreated; Sound effect processing circuit also is provided with three AV signal input ports and an I
2C bus control input end mouth.
In put demodulator circuit and adopt IC-TA1267, sound effect processing circuit adopts IC-TA1304, logic switching circuit adopts IC-TC4052.
Advantage that the utility model compared with prior art has and effect:
When 1, the utility model can be to the picture intelligence demodulation audio signal is handled, made stress, bass, stereo etc. can control respectively, can select one road TV signal and three road AV signals by logic switch simultaneously.And support the sound accompaniment multi-modulation scheme.Make digital HDTV (High-Definition Television) handle the higher level that reached to image quality and sound accompaniment.
2, the utility model adopts the IC-TA1267 of TOSHIBA company in demodulation circuit of intermediate frequency, will separate after the video and audio signal demodulation.Audio signal after the separation is handled by Audio Processing chip IC-TA1304, by software control sound accompaniment output effect.Use logic switch IC-TC4052 that the sound accompaniment of one road TV signal and three road AV signals is switched simultaneously.Result of use shows as on the basis of satisfying the picture quality requirement, and the sound accompaniment effect is more outstanding.
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 circuit theory diagrams of the present utility model,
Fig. 4 is the circuit block diagram of a kind of application example of the utility model.
Embodiment
The utility model is made up of housing (1), the printed circuit board that is positioned at the outer external tapping (2) of housing (1) and is positioned at housing (1).Put demodulator circuit, sound effect processing circuit and logic switching circuit during printed circuit board is provided with and form, in put the signal termination medium-frequency TV signal of demodulator circuit, in put demodulator circuit and be provided with two switch terminals, connect two switch terminals of sound effect processing circuit respectively.In put demodulator circuit and also be provided with the AGC output port, AFC output port and the sound accompaniment output port that is untreated.In put demodulator circuit audio signal output end connect the audio signal input end of sound effect processing circuit, image signal output end connects digital decoding circuit image signal input part, the control end of the control termination sound effect processing circuit of logic switching circuit.Sound effect processing circuit also is provided with three AV signal input ports and an I
2C bus control input end mouth.In put the IC-TA1267 that demodulator circuit adopts TOSHIBA company, sound effect processing circuit adopts the IC-TA1304 of TOSHIBA company, logic switching circuit adopts the ROHM IC-TC4052 of company.
Manufacture method: printed circuit board adopts single layer board, plug-in mounting technology of a paster, and component density is moderate, and wave-soldering technology is adopted in welding.External tapping has 27 row's pins.Surface mount elements is mounted on the top layer of printed board, plug-in unit element plug-in mounting printed board round floor.
Operation principle: intermediate-freuqncy signal is amplified through one-level after entering module, enters picture-and-sound sound table respectively and separates, and the signal after the separation is put IC in passage enters separately, through outputting video signal and audio signal after the demodulation.Vision signal directly outputs to the digital decoding chip, and audio signal directly enters the audio processing IC, passes through I
2The C bus is controlled it.There are three groups of AV signals to be input to the audio processing IC simultaneously, TV signal and AV signal switched by logic switch.Output one road AGC voltage control level and one road AFC control level in this process.
Claims (4)
1, amplification module during a kind of digital HDTV (High-Definition Television) is used, it is characterized in that: described module by in put demodulator circuit, sound effect processing circuit and logic switching circuit and form, in put the signal termination medium-frequency TV signal of demodulator circuit, the switch terminals of switch termination sound effect processing circuit, audio signal output end connects the audio signal input end of sound effect processing circuit, image signal output end connects digital decoding circuit image signal input part, the control end of the control termination sound effect processing circuit of logic switching circuit.
2, digital HDTV (High-Definition Television) according to claim 1 with in amplification module, it is characterized in that: in put demodulator circuit and be provided with two switch terminals, connect two switch terminals of sound effect processing circuit respectively.
3, digital HDTV (High-Definition Television) according to claim 1 with in amplification module, it is characterized in that: in put demodulator circuit and also be provided with the AGC output port, AFC output port and the sound accompaniment output port that is untreated; Sound effect processing circuit also is provided with three AV signal input ports and an I
2C bus control input end mouth.
4, according to claim 1 or 2 or 3 described digital HDTV (High-Definition Television) with in amplification module, it is characterized in that: in put demodulator circuit and adopt IC-TA1267, sound effect processing circuit adopts IC-TA1304, logic switching circuit adopts IC-TC4052.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079034 CN2807658Y (en) | 2005-07-05 | 2005-07-05 | Medium frequency amplifier module used for digital high-definition television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079034 CN2807658Y (en) | 2005-07-05 | 2005-07-05 | Medium frequency amplifier module used for digital high-definition television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2807658Y true CN2807658Y (en) | 2006-08-16 |
Family
ID=36921952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520079034 Expired - Fee Related CN2807658Y (en) | 2005-07-05 | 2005-07-05 | Medium frequency amplifier module used for digital high-definition television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2807658Y (en) |
-
2005
- 2005-07-05 CN CN 200520079034 patent/CN2807658Y/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: 20060816 |