CN201294587Y - Two-in-one electronic tuner - Google Patents
Two-in-one electronic tuner Download PDFInfo
- Publication number
- CN201294587Y CN201294587Y CNU2008202224492U CN200820222449U CN201294587Y CN 201294587 Y CN201294587 Y CN 201294587Y CN U2008202224492 U CNU2008202224492 U CN U2008202224492U CN 200820222449 U CN200820222449 U CN 200820222449U CN 201294587 Y CN201294587 Y CN 201294587Y
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- intermediate frequency
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Abstract
The utility model relates to a two-in-one electronic tuning unit. A printed circuit board is arranged in a case body (1) which is provided with a radiofrequency signal input port (2), a composite video signal VIDEO output port (3) and an audio signal AUDIO output port (4) outside, an input end of a frequency synthesis electronic tuning circuit is connected with the radiofrequency signal input port (2), an output end of the frequency synthesis electronic tuning circuit is connected with an input end of an intermediate frequency demodulation processing circuit, and two output ends of the intermediate frequency demodulation processing circuit are respectively connected with the composite video signal VIDEO output port (3) and the audio signal AUDIO output port (4). The composite electronic tuning unit integrates the electronic tuning circuit and the intermediate frequency demodulation processing circuit in the case body to form an independent product which is characterized in that electric property, reliability and electromagnetic compatibility are better than national and industry standards. The composite electronic tuning unit is mainly used for large-screen, multi-functional, multi-standard and high-definition television receivers such as LCD and PDP television receivers.
Description
Technical field
The utility model relates to a kind of two-in-one electronic tuner,
Background technology
Electronic tuning unit of the prior art does not have built-in intermediate frequency demodulation treatment circuit, can only export intermediate-freuqncy signal, intermediate-freuqncy signal demodulation process circuit operated by rotary motion on motherboard, electric property, reliability, Electro Magnetic Compatibility are lower, are difficult to satisfy the supporting demand of the middle and high end television set of television set complete system plant.
Summary of the invention
The technical problem that the utility model solves: design a kind of two-in-one electronic tuner, electronic tuning unit and intermediate frequency demodulation treatment circuit are integrated in the housing, form an independently product, electric property, reliability, Electro Magnetic Compatibility are higher than country, industry standard, can realize that tuning filtering, Frequency mixing processing, the intermediate frequency demodulation of multiple systems colour TV signal handled.Be mainly used in large-screen, multi-functional, multi-modulation scheme, high-definition TV receiver, comprise LCD, PDP television receiver etc.
Technical solution of the present utility model: a kind of two-in-one electronic tuner, comprise housing (1), housing is provided with printed circuit board in (1), housing (1) is outside equipped with radio-frequency (RF) signal input end mouth (2), composite video signal VIDEO output port (3) and audio signal AUDIO output port (4), printed circuit board is provided with frequency synthesising type electronic tuning circuit and intermediate frequency demodulation treatment circuit, the input termination radio-frequency (RF) signal input end mouth (2) of frequency synthesising type electronic tuning circuit, the input of output termination intermediate frequency demodulation treatment circuit, two outputs of intermediate frequency demodulation treatment circuit connect composite video signal VIDEO output port (3) and audio signal AUDIO output (4) respectively.
Described frequency synthesising type electronic tuning circuit is made up of radio frequency input circuit, high-frequency amplifier circuit, double-tuned circuit, local oscillation circuit, mixting circuit and intermediate frequency output loop; The input termination radio-frequency (RF) signal input end mouth (2) of radio frequency input circuit, the input of output termination high-frequency amplifier circuit, the input of the output termination double-tuned circuit of high-frequency amplifier circuit, the input of the output termination mixting circuit of double-tuned circuit, the input of the output termination mixting circuit of local oscillation circuit, the input of the output termination intermediate frequency output loop of mixting circuit, the input of the output termination intermediate frequency demodulation treatment circuit of intermediate frequency output loop.
Described intermediate frequency demodulation treatment circuit is made up of filter circuit and signal processing circuit, the output of the input termination frequency synthesising type electronic tuning circuit of filter circuit, the input of the output termination signal processing circuit of filter circuit, two outputs of signal processing circuit connect composite video signal VIDEO output port (3) and audio signal AUDIO output (4) respectively.
Described mixting circuit is IC TDA6509AHN.
Described signal processing circuit is IC TDA9881HN.
Described printed circuit board is a double-sided PCB, and surface mount elements is mounted on the top layer of printed board, and the plug-in unit element is inserted into the bottom of printed board, and component density is moderate, and second reflow technology is adopted in welding.
The utility model compared with prior art is integrated in electronic tuning circuit and intermediate frequency demodulation treatment circuit in the housing, form an independently product, electric property, reliability, Electro Magnetic Compatibility are higher than country, industry standard, can realize that tuning filtering, Frequency mixing processing, the intermediate frequency demodulation of multiple systems colour TV signal handled.Be mainly used in large-screen, multi-functional, multi-modulation scheme, high-definition TV receiver, comprise LCD, PDP television receiver etc.
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.
Embodiment:
1,2,3 a kind of embodiment of the present utility model is described in conjunction with the accompanying drawings.
A kind of two-in-one electronic tuner, its housing is provided with printed circuit board in (1), housing (1) is outside equipped with radio-frequency (RF) signal input end mouth (2), composite video signal VIDEO output port (3) and audio signal AUDIO output port (4), and printed circuit board is provided with frequency synthesising type electronic tuning circuit and intermediate frequency demodulation treatment circuit.
Frequency synthesising type electronic tuning circuit is made up of radio frequency input circuit, high-frequency amplifier circuit, double-tuned circuit, local oscillation circuit, mixting circuit and intermediate frequency output loop; The input termination radio-frequency (RF) signal input end mouth (2) of radio frequency input circuit, the input of output termination high-frequency amplifier circuit, the input of the output termination double-tuned circuit of high-frequency amplifier circuit, an input of the output termination mixting circuit of double-tuned circuit, another input of the output termination mixting circuit of local oscillation circuit, the input of the output termination intermediate frequency output loop of mixting circuit, the input of the output termination intermediate frequency demodulation treatment circuit of intermediate frequency output loop.Mixting circuit is IC TDA6509AHN.
The intermediate frequency demodulation treatment circuit is made up of filter circuit and signal processing circuit, the input of filter circuit connects the output of intermediate frequency output loop by the intermediate frequency trap-wave loop, the input of the output termination signal processing circuit of filter circuit, two outputs of signal processing circuit connect composite video signal VIDEO output port (3) and audio signal AUDIO output (4) respectively.Signal processing circuit is IC TDA9881HN.
Printed circuit board is a double-sided PCB, and surface mount elements is mounted on the top layer of printed board, and the plug-in unit element is inserted into the bottom of printed board, and component density is moderate, and second reflow technology is adopted in welding.
Operation principle: the color TV radiofrequency signal of radio-frequency (RF) signal input end mouth input, carry out input impedance matching and logical channel frequency-selecting, tuning, filtering by input circuit, enter three radio-frequency channels respectively, carry out that high frequency amplifies, the double tunning useful signal is selected.After IC TDA6509AHN mixing, frequency-selecting of intermediate frequency and processing and amplifying, the output medium-frequency TV signal.Medium-frequency TV signal carries out signal entering intermediate frequency process chip IC TDA9881HN after picture-and-sound separates through corresponding intermediate frequency SAW (Surface Acoustic Wave) filter, to Signal Separation detection, phase demodulation, demodulation, AGC control, final output video VIDEO, audio A UDIO baseband signal and second accompanying sound intermediate frequency signal.
Claims (5)
1, a kind of two-in-one electronic tuner, comprise housing (1), housing is provided with printed circuit board in (1), housing (1) is outside equipped with radio-frequency (RF) signal input end mouth (2), it is characterized in that: housing (1) is outside equipped with composite video signal VIDEO output port (3) and audio signal AUDIO output port (4), printed circuit board is provided with frequency synthesising type electronic tuning circuit and intermediate frequency demodulation treatment circuit, the input termination radio-frequency (RF) signal input end mouth (2) of frequency synthesising type electronic tuning circuit, the input of output termination intermediate frequency demodulation treatment circuit, two outputs of intermediate frequency demodulation treatment circuit connect composite video signal VIDEO output port (3) and audio signal AUDIO output (4) respectively.
2, two-in-one electronic tuner according to claim 1 is characterized in that: described frequency synthesising type electronic tuning circuit is made up of radio frequency input circuit, high-frequency amplifier circuit, double-tuned circuit, local oscillation circuit, mixting circuit and intermediate frequency output loop; The input termination radio-frequency (RF) signal input end mouth (2) of radio frequency input circuit, the input of output termination high-frequency amplifier circuit, the input of the output termination double-tuned circuit of high-frequency amplifier circuit, the input of the output termination mixting circuit of double-tuned circuit, the input of the output termination mixting circuit of local oscillation circuit, the input of the output termination intermediate frequency output loop of mixting circuit, the input of the output termination intermediate frequency demodulation treatment circuit of intermediate frequency output loop.
3, two-in-one electronic tuner according to claim 1, it is characterized in that: described intermediate frequency demodulation treatment circuit is made up of filter circuit and signal processing circuit, the output of the input termination frequency synthesising type electronic tuning circuit of filter circuit, the input of the output termination signal processing circuit of filter circuit, two outputs of signal processing circuit connect composite video signal VIDEO output port (3) and audio signal AUDIO output (4) respectively.
4, two-in-one electronic tuner according to claim 2 is characterized in that: described mixting circuit is IC TDA6509AHN.
5, two-in-one electronic tuner according to claim 3 is characterized in that: described signal processing circuit is IC TDA9881HN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202224492U CN201294587Y (en) | 2008-10-31 | 2008-10-31 | Two-in-one electronic tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202224492U CN201294587Y (en) | 2008-10-31 | 2008-10-31 | Two-in-one electronic tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294587Y true CN201294587Y (en) | 2009-08-19 |
Family
ID=41008069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202224492U Expired - Fee Related CN201294587Y (en) | 2008-10-31 | 2008-10-31 | Two-in-one electronic tuner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201294587Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282628A (en) * | 2018-02-09 | 2018-07-13 | 深圳创维－Rgb电子有限公司 | TV motherboard, TV motherboard component and DTV |
-
2008
- 2008-10-31 CN CNU2008202224492U patent/CN201294587Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282628A (en) * | 2018-02-09 | 2018-07-13 | 深圳创维－Rgb电子有限公司 | TV motherboard, TV motherboard component and DTV |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shaanxi Lingyun Technology Co.,Ltd. Assignor: Linghua Electronic Co., Ltd., Shaaxi Contract fulfillment period: 2009.9.1 to 2014.8.30 Contract record no.: 2009610000163 Denomination of utility model: Two-in-one electronic tuner Granted publication date: 20090819 License type: Exclusive license Record date: 20091214 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.9.1 TO 2014.8.30; CHANGE OF CONTRACT Name of requester: SHAANXI LINGYUN TECHNOLOGY CO. LTD. Effective date: 20091214 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20101031 |