CN107659781A - A kind of high-frequency tuner flexibly controlled - Google Patents
A kind of high-frequency tuner flexibly controlled Download PDFInfo
- Publication number
- CN107659781A CN107659781A CN201711069788.1A CN201711069788A CN107659781A CN 107659781 A CN107659781 A CN 107659781A CN 201711069788 A CN201711069788 A CN 201711069788A CN 107659781 A CN107659781 A CN 107659781A
- Authority
- CN
- China
- Prior art keywords
- frequency
- tuner
- protection circuit
- wave filter
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
The present invention relates to radio circuit technical field, in particular discloses a kind of high-frequency tuner flexibly controlled, including：Radiofrequency signal input interface, electric capacity, protection circuit, wave filter, described protection circuit one end is between electric capacity and wave filter, the other end is grounded, the electric capacity is between radiofrequency signal input interface and protection circuit, inductance is parallel with protection circuit both ends, also include tuner module, main control module, the tuner module connects wave filter, main control module connects tuner module, and then tuning can flexibly be controlled by main control module, avoid other circuits caused by high-frequency signal from being damaged, ensure the display quality of television set.
Description
Technical field
The present invention relates to radio circuit technical field, more particularly to a kind of high-frequency tuner flexibly controlled.
Background technology
Existing high-frequency tuner can receive the television channel program information carried in radiofrequency signal, then pass through processing
It is sent in television set.
But because existing high-frequency signal easily causes other circuits to be damaged, the effect received is influenceed, so as to influence electricity
Depending on the display quality of machine.
The content of the invention
The invention provides a kind of high-frequency tuner flexibly controlled, solves in the prior art because high-frequency signal is easy
Cause other circuits to be damaged, influence the technical problem of the display quality of television set.
In order to solve the above technical problems, one aspect of the present invention is：
A kind of high-frequency tuner flexibly controlled, including：Radiofrequency signal input interface, electric capacity, protection circuit, wave filter, it is described
Protection circuit one end is located at electric capacity and before wave filter, other end ground connection, the electric capacity is located at radiofrequency signal input interface with preventing
Between protection circuit, inductance, in addition to tuner module, main control module are parallel with protection circuit both ends, the tuner module connects
Connect wave filter, main control module connection tuner module.
Further, the protection circuit is specially two reverse diodes in parallel.
Further, the wave filter is high frequency filter.
Further, the tuner module be used for wave filter output intermediate-freuqncy signal be tuned.
Further, the main control module is used to be controlled tuner module, and controls selection to channel, high frequency
The amplification of signal and frequency-conversion processing.
The beneficial effects of the invention are as follows：It is different from the situation of prior art：
Due in the high-frequency tuner that is flexibly controlled at this using radiofrequency signal input interface, electric capacity, protection circuit, wave filter,
Between electric capacity and wave filter, other end ground connection, electric capacity is located at radiofrequency signal input interface and protection electricity for protection circuit one end
Between road, inductance, in addition to tuner module, main control module are parallel with protection circuit both ends, tuner module connects wave filter,
Main control module connects tuner module, and then can flexibly control tuning by main control module, caused by avoiding high-frequency signal
Other circuits are damaged, and have ensured the display quality of television set.
Brief description of the drawings
Fig. 1 is the module diagram of the high-frequency tuner flexibly controlled in the embodiment of the present invention.
Embodiment
The invention provides a kind of high-frequency tuner flexibly controlled, solves in the prior art because high-frequency signal is easy
Cause other circuits to be damaged, influence the technical problem of the display quality of television set.
In order to solve the above-mentioned technical problem, it is described in detail with reference to Figure of description.
A kind of high-frequency tuner flexibly controlled provided in an embodiment of the present invention, as shown in figure 1, including：Radiofrequency signal is defeated
Incoming interface 10, electric capacity 20, protection circuit 30, wave filter 40, the one end of protection circuit 30 between electric capacity 20 and wave filter 40,
The other end is grounded, and the electric capacity 20 is between radiofrequency signal input interface 10 and protection circuit 30, at the both ends of protection circuit 30 simultaneously
It is associated with inductance 50, in addition to tuner module 60, main control module 70, the tuner module 60 connection wave filter 40, main control module
70 connection tuner modules 60.
In a particular embodiment, tuner module 60 is controlled by main control module 70, so as to control selection to channel,
The amplification of high-frequency signal and frequency-conversion processing, so as to ensure that the signal of high-frequency tuner output can not influence the aobvious of television set
Show quality.Wherein, the tuner module 60 is used to be tuned the intermediate-freuqncy signal of wave filter output.
In the high-frequency tuner that this is flexibly controlled, the wave filter 40 is specially high frequency filter, for filtering out low frequency letter
Number, ensure that high-frequency signal passes through.
In the present invention, the protection circuit 30 is specially the diode of both direction in parallel.By monitoring voltage value not
More than preset value, other circuits can be effectively protected to be not damaged by.
Inductance 50 is connected with the both ends of protection circuit 30, power-frequency voltage signal is exported and is grounded by the inductance, avoids work
Frequency voltage signal produces interference to protection circuit 30.
Using above-mentioned technical scheme, tuning can flexibly be controlled by main control module, avoid high-frequency signal from leading
Other circuits caused are damaged, and have ensured the display quality of television set.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (5)
- A kind of 1. high-frequency tuner flexibly controlled, it is characterised in that including：Radiofrequency signal input interface, electric capacity, protection electricity Road, wave filter, between electric capacity and wave filter, other end ground connection, the electric capacity is located at radio frequency letter for described protection circuit one end Number between input interface and protection circuit, inductance, in addition to tuner module, main control module are parallel with protection circuit both ends, The tuner module connects wave filter, main control module connection tuner module.
- 2. the high-frequency tuner according to claim 1 flexibly controlled, it is characterised in that the protection circuit is specially simultaneously Two reverse diodes of connection.
- 3. the high-frequency tuner according to claim 1 flexibly controlled, it is characterised in that the wave filter is High frequency filter Device.
- 4. the high-frequency tuner according to claim 1 flexibly controlled, it is characterised in that the tuner module is used for filter The intermediate-freuqncy signal of ripple device output is tuned.
- 5. the high-frequency tuner according to claim 1 flexibly controlled, it is characterised in that the main control module be used for pair Tuner module is controlled, and controls selection to channel, the amplification of high-frequency signal and frequency-conversion processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069788.1A CN107659781A (en) | 2017-11-03 | 2017-11-03 | A kind of high-frequency tuner flexibly controlled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069788.1A CN107659781A (en) | 2017-11-03 | 2017-11-03 | A kind of high-frequency tuner flexibly controlled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107659781A true CN107659781A (en) | 2018-02-02 |
Family
ID=61096435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711069788.1A Withdrawn CN107659781A (en) | 2017-11-03 | 2017-11-03 | A kind of high-frequency tuner flexibly controlled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107659781A (en) |
-
2017
- 2017-11-03 CN CN201711069788.1A patent/CN107659781A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180202 |