CN202425018U - Earphone terminal interface circuit and set top box with the same - Google Patents
Earphone terminal interface circuit and set top box with the same Download PDFInfo
- Publication number
- CN202425018U CN202425018U CN2012200433536U CN201220043353U CN202425018U CN 202425018 U CN202425018 U CN 202425018U CN 2012200433536 U CN2012200433536 U CN 2012200433536U CN 201220043353 U CN201220043353 U CN 201220043353U CN 202425018 U CN202425018 U CN 202425018U
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- remote control
- pair
- infrared
- interface circuit
- earphone terminal
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Abstract
The utility model provides an earphone terminal interface circuit and a set top box with the same. The earphone terminal interface circuit comprises two pairs of channels which are connected through an elastic sheet, wherein a positive pole end of the first pair of channels is connected with a remote control receiving head, and a negative pole end of the first pair of channels is connected with a remote control receiving input/out (I/O) end of a main chip; and a positive pole end of the second pair of channels is hung in the air, and a power supply resistor is connected between a negative pole end of the second pair of channels and a direct current power supply. The circuit has a simple structure and is low in cost; and an infrared remote control of a front control board is disconnected for reception when an infrared extended wire is inserted, and an infrared signal is received by the built-in remote control receiving head when the infrared extended wire is not inserted, so that the problem of the interference of two channels of infrared receptions is effectively solved, and the receiving performance of the infrared remote control is improved.
Description
Technical field
The utility model belongs to the digital television techniques field, relates to a kind of earphone terminal interface circuit and STB specifically.
Background technology
When the STB infrared remote control receiver only receives the infrared ray irradiation, just can play the effect of remote control STB, thereby existing most of STB all is to be placed on infrared remote controller to implement in the distance range of remote control.
Along with the development of STB miniaturization, wall-hanging, back of the body concealed more and more, the user also more and more trends towards being placed on TV to STB behind, and saving the space, this has just proposed requirement that external infrared remote control is received.General way is through the external infrared extended line of earphone terminal in the industry now, draws infrared remote-controlled signal, to realize the requirement of infrared reception extension.Used the earphone terminal generally is directly to draw infrared remote-controlled signal (IR) in the past; Because the control plate carries infrared reception before the STB; During actual the use, during the infrared reception line of extension easily with STB before the red of control strip impact from outer reception, cause infrared reception undesired.
The utility model content
For solving the problem that the infrared existence of existing STB two-way is disturbed, a kind of earphone terminal interface circuit is proposed for addressing the above problem, the utility model adopts following technical scheme to realize:
A kind of earphone terminal interface circuit; Comprise two pairs of paths that link together through shell fragment; Wherein, the positive terminal of said first pair of path connects remote control and receives head, and the remote control that negative pole end connects master chip receives the I/O end; The positive terminal of said second pair of path is unsettled, is connected a supplying resistance between negative pole end and the DC power supply.
Further, the utility model also has following technical characterictic: the remote control of said master chip receives the I/O end and connects said DC power supply through a pull-up resistor.
Further, the utility model also has following technical characterictic: the negative pole end of said second pair of path is through said electrochemical capacitor ground connection.
Further, the utility model also has following technical characterictic: two ends parallel connection one filter capacitor of said electrochemical capacitor, said filter capacitor and said supplying resistance constitute the RC filter.
Further, the utility model also has following technical characterictic: be connected one between said remote control receives head and the remote control reception I/O of said master chip holds and select resistance.
The utility model also proposes a kind of STB in addition; Comprise that the remote control that two pairs of paths that link together through shell fragment, preceding control plate remote controls receive head and master chip receives the I/O end; It is characterized in that: the positive terminal of said first pair of path connects remote control and receives head; The remote control that negative pole end connects master chip receives the I/O end, and the positive terminal of said second pair of path is unsettled, is connected a supplying resistance between negative pole end and the DC power supply.
Aforesaid STB, the remote control of said master chip receive the I/O end and connect said DC power supply through a pull-up resistor.
Aforesaid STB, the negative pole end of said second pair of path is through said electrochemical capacitor ground connection.
Aforesaid STB, two ends parallel connection one filter capacitor of said electrochemical capacitor, said filter capacitor and said supplying resistance constitute the RC filter.
Be connected one between aforesaid STB, said remote control receive head and the remote control reception I/O of said master chip holds and select resistance.
Compared with prior art, advantage of the utility model and good effect are following:
The utility model adopts the earphone terminal of belt switch, and designs corresponding earphone terminal interface circuit, and circuit structure is simple, with low cost; When inserting infrared extended line; The infrared remote control of control plate receives before breaking off, and when not inserting infrared extended line, receives head through built-in remote control and receives infrared signal; Thereby efficiently solve the interference problem of the infrared reception of two-way, improved the receptivity of infrared remote control.
After the embodiment in conjunction with advantages the utility model, other characteristics of the utility model and advantage will become clearer.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the utility model earphone interface circuit schematic diagram;
Fig. 2 is the utility model STB structural representation.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer; To combine the accompanying drawing among the utility model embodiment below; Technical scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
With reference to figure 1; The utility model proposes a kind of earphone terminal interface circuit, is a kind of earphone terminal circuit of belt switch specifically, comprises two pairs of paths that link together through shell fragment; Positive terminal 4 pin of said first pair of path connect remote control through resistance R 1 and receive head reception IR_F signal; The remote control that negative pole end 3 pin connect master chip receives the I/O termination and receives the IR signal, and the positive terminal of said second pair of path is unsettled, is connected a supplying resistance R3 between negative pole end and the DC power supply.
When using infrared extension cord, earphone terminal XS4 inserts extension cord, and 3,4 pin of earphone terminal XS4 break off, and cuts off built-in remote control and receives path, at this moment, can only receive remote signal through infrared extended line; When not using infrared extension cord, 3,4 pin of earphone terminal XS4 connect, and built-in infrared reception is normally used.
In order to prevent to disturb, and then the remote control that increases master chip receives the stability and the carrying load ability of I/O end, and the remote control of said master chip receives the I/O end and meets DC power supply D through a pull-up resistor R4.
In order to stablize the power supply of infrared extended line; Reduce the power supply ripple; The utility model connects filter circuit on the supply access of infrared extension cord; Said filter circuit can be an electrochemical capacitor, and its concrete annexation is: negative pole end 1 pin of said second pair of path is through said electrochemical capacitor CE45 ground connection; Certainly in order further to reduce ripple, the utility model is at the two ends of electrochemical capacitor CE45 parallel connection one filter capacitor C36, and filter capacitor C36 and supplying resistance R3 constitute the RC filter again, can further suppress the ripple of supplying power, and stablize the power supply of infrared extended line.
In addition, be connected one between the said remote control of the utility model receives head and the remote control reception I/O of said master chip holds and select resistance R 2, selecting resistance R 2 is compatible designs; In the time need not using earphone terminal XS4, can weld and select resistance R 2, when needs use earphone terminal XS4; Can weld and select resistance R 2, also can not weld, and when receiving infrared signal; All can guarantee to have only one road infrared remote receiver be able to receive, thereby efficiently solve the interference problem of the infrared reception of two-way.
Need to prove, the interface circuit of the syllogic earphone terminal that the utility model is introduced, the design of other types earphone interface circuit is similar with the utility model, and pin connects difference nothing but, and this does not give an example one by one.
The utility model also proposes a kind of STB 1 in addition, comprises that the earphone terminal 2 of belt switch, preceding control plate remote control receive the remote control reception I/O end of head, master chip, and above-mentioned earphone interface circuit.
During actual the use infrared extension cord 3 is inserted into earphone terminal 2,3 pin in the interface separate with 4 pin at this moment, and the remote control of master chip receives the I/O termination and receives the infrared signal that infrared extension cord connects transmission, and infrared extension cord is realized power supply through 1 pin of interface circuit; When not connecing infrared extension cord; In the interface 3,4 pin link together; The remote control of master chip receives controls the infrared signal that the plate remote control receives the head transmission before the I/O termination is received STB, thereby has guaranteed to have only one road infrared remote control to receive path in any case; Avoid interference, improved the infrared remote control receptivity.
What should explain at last is: above embodiment is only in order to the technical scheme of explanation the utility model, but not to its restriction; Although the utility model has been carried out detailed explanation with reference to previous embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of each embodiment technical scheme of essence disengaging the utility model of relevant art scheme.
Claims (10)
1. earphone terminal interface circuit; Comprise two pairs of paths that link together through shell fragment; It is characterized in that: the positive terminal of said first pair of path connects remote control and receives head; The remote control that negative pole end connects master chip receives the I/O end, and the positive terminal of said second pair of path is unsettled, is connected a supplying resistance between negative pole end and the DC power supply.
2. earphone terminal interface circuit according to claim 1 is characterized in that: the remote control of said master chip receives the I/O end and connects said DC power supply through a pull-up resistor.
3. earphone terminal interface circuit according to claim 2 is characterized in that: the negative pole end of said second pair of path is through said electrochemical capacitor ground connection.
4. earphone terminal interface circuit according to claim 3 is characterized in that: two ends parallel connection one filter capacitor of said electrochemical capacitor, said filter capacitor and said supplying resistance constitute the RC filter.
5. earphone terminal interface circuit according to claim 4 is characterized in that: be connected one between said remote control receives head and the remote control reception I/O of said master chip holds and select resistance.
6. STB with the said earphone terminal interface circuit of claim 1; Comprise that the remote control that two pairs of paths that link together through shell fragment, preceding control plate remote controls receive head and master chip receives the I/O end; It is characterized in that: the positive terminal of said first pair of path connects remote control and receives head; The remote control that negative pole end connects master chip receives the I/O end, and the positive terminal of said second pair of path is unsettled, is connected a supplying resistance between negative pole end and the DC power supply.
7. STB according to claim 6 is characterized in that: the remote control of said master chip receives the I/O end and connects said DC power supply through a pull-up resistor.
8. STB according to claim 7 is characterized in that: the negative pole end of said second pair of path is through said electrochemical capacitor ground connection.
9. STB according to claim 8 is characterized in that: two ends parallel connection one filter capacitor of said electrochemical capacitor, said filter capacitor and said supplying resistance constitute the RC filter.
10. STB according to claim 9 is characterized in that: be connected one between said remote control receives head and the remote control reception I/O of said master chip holds and select resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200433536U CN202425018U (en) | 2012-02-10 | 2012-02-10 | Earphone terminal interface circuit and set top box with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200433536U CN202425018U (en) | 2012-02-10 | 2012-02-10 | Earphone terminal interface circuit and set top box with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202425018U true CN202425018U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200433536U Expired - Fee Related CN202425018U (en) | 2012-02-10 | 2012-02-10 | Earphone terminal interface circuit and set top box with the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202425018U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103501450A (en) * | 2013-09-26 | 2014-01-08 | 深圳市九洲电器有限公司 | Set-top box and connection method for IR (Infrared) end |
| WO2018161490A1 (en) * | 2017-03-08 | 2018-09-13 | 深圳三地一芯电子有限责任公司 | Interface circuit, chip comprising interface circuit and manufacturing method therefor |
-
2012
- 2012-02-10 CN CN2012200433536U patent/CN202425018U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103501450A (en) * | 2013-09-26 | 2014-01-08 | 深圳市九洲电器有限公司 | Set-top box and connection method for IR (Infrared) end |
| WO2018161490A1 (en) * | 2017-03-08 | 2018-09-13 | 深圳三地一芯电子有限责任公司 | Interface circuit, chip comprising interface circuit and manufacturing method therefor |
| CN108574484A (en) * | 2017-03-08 | 2018-09-25 | 深圳三地芯电子有限责任公司 | A kind of interface circuit, the chip and preparation method thereof comprising interface circuit |
| CN108574484B (en) * | 2017-03-08 | 2021-05-11 | 深圳三地一芯电子有限责任公司 | Interface circuit, chip comprising interface circuit and manufacturing method of chip |
| US11140777B2 (en) | 2017-03-08 | 2021-10-05 | Shenzhen Sandiyixin Electronic Co., Ltd. | Interface circuit, chip containing interface circuit and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20200210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |