CN103856268B - Infrared remote-controlled signal countdown circuit structure - Google Patents
Infrared remote-controlled signal countdown circuit structure Download PDFInfo
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- CN103856268B CN103856268B CN201210499881.7A CN201210499881A CN103856268B CN 103856268 B CN103856268 B CN 103856268B CN 201210499881 A CN201210499881 A CN 201210499881A CN 103856268 B CN103856268 B CN 103856268B
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Abstract
The present invention relates to a kind of infrared remote-controlled signal countdown circuit structure, belong to circuit structure technical field. Because this infrared remote-controlled signal countdown circuit structure comprises at least two cover mask ROMs and selects application of logic circuit module, every cover mask ROM all stores a set of coding rule information; And by control signal, user can utilize and select application of logic circuit module to select the coding rule information that wherein a set of mask ROM is stored, the coding rule information using as this infrared remote-controlled signal countdown circuit structure. Thereby can be by setting, easily by infrared remote-controlled signal countdown circuit structure applications of the present invention in various remote controllers, significantly reduce production costs and the market risk, and infrared remote-controlled signal countdown circuit structure of the present invention is simple in structure, range of application is also comparatively extensive.
Description
Technical field
The present invention relates to circuit structure technical field, particularly control circuit technical field of structures, specifically refers to a kind of infrared distantControl signal countdown circuit structure.
Background technology
Infrared remote control is the remote control mode that current various electronic and electrical equipment and household electrical appliance the most generally adopt, and which possesses skillsRipe, realize that cost is low, directive property good, low-power consumption, without advantages such as electromagnetic interference, need transmitting and receiving circuit mutuallyAllotment of labor does. For realizing lower power consumption and matching effect, infrared remote control generally adopts specific signaling form, with the number after modulatingForm according to envelope and carrier combination is transmitted.
In infrared remote controller, for realizing low cost requirement, generally adopt built-in MASKROM(mask ROM)In preset coding rule to realize control to pattern, code value and code length thereof, can be by the coding rule information in amendment ROM,Realize multiple remote control pattern.
Typical infrared remote controller basic module structure as shown in Figure 1. Can be divided into key scanning logic, codimg logic, clock electricityRoad, MASKROM and TL. Wherein clock circuit is for providing stable clock frequency. Key scanning circuit produces and sweepsRetouch waveform external connection keyboard, currently generally adopt tower keyboard. Codimg logic is the treatment circuit to key scanning result, have button byAssociative key scanning result after lower, produces one group according to the information such as pattern, code length compiling preset in MASKROM and is used for comprisingThe waveform of specifying information. Information waveform and carrier combination that TL produces codimg logic, produce the signal that can be used for transmittingOutput.
In other circuit, the structure of existing built-in high precision oscillator as shown in Figure 2, does not need the elements such as external crystal oscillator to get final product real at presentNow stable vibration. But adopt at present the circuit of built-in high precision oscillator need adopt submicron order technique, the flow of at every turn making a plateExpense significantly goes up, and one group of MASKROM only can realize the key assignments of a kind of pattern and a set of button, once market situationFluctuation, may cause larger loss.
Summary of the invention
The object of the invention is to have overcome above-mentioned shortcoming of the prior art, a kind of multiple pattern that comprises is provided, can be easilyBe applied in various remote controllers, significantly reduce production costs and the market risk, and simple in structure, what have wide range of applications is infrared distantControl signal countdown circuit structure.
In order to realize above-mentioned object, infrared remote-controlled signal countdown circuit structure of the present invention has following formation:
This circuit structure comprises: oscillator, key scanning application of logic circuit module, at least two cover mask ROMs, selection logicCircuit module, codimg logic circuit module and TL circuit module. Wherein, oscillator is in order to provide internal reference signal;Key scanning application of logic circuit module connects respectively described oscillator and external remote keyboard, in order to according to user key-press, action producesKeyboard scan waveform signal; Mask ROM described in every cover all stores a set of coding rule information; Select logic circuitModule connects respectively the mask ROM described in each cover, in order to select wherein a set of mask ROM according to control signalThe coding rule information of storing; Codimg logic circuit module connect respectively described oscillator, key scanning application of logic circuit module andEach cover mask ROM, in order to according to selected coding rule information, described keyboard scan waveform signal is encoded,The digital output signal that generation comprises control information; TL circuit module connects described codimg logic circuit module and outsideInfrared launcher, in order to according to the outside infrared launcher described in described digital output signal control.
In this infrared remote-controlled signal countdown circuit structure, the coding rule letter that described each cover mask ROM is storedBreath includes separately independently pattern, systematic code and key set code.
In this infrared remote-controlled signal countdown circuit structure, described TL circuit module comprises N-type MOS transistor,The grid of described N-type MOS transistor connects the digital output signal of described codimg logic circuit module, described N-typeThe source ground of MOS transistor, the drain electrode of described N-type MOS transistor connects described outside infrared launcher.
In this infrared remote-controlled signal countdown circuit structure, the channel width-over-length ratio of described N-type MOS transistor is greater than 1000.
In this infrared remote-controlled signal countdown circuit structure, described outside infrared launcher is light emitting diode, describedThe drain electrode of N-type MOS transistor connects the negative electrode of described light emitting diode, the anodic bonding external power source of this light emitting diode.
In this infrared remote-controlled signal countdown circuit structure, it is defeated that described selection application of logic circuit module comprises that the user of n position selectsEnter end, this circuit structure has 2nCover mask ROM, user selects input to input by the user of described n positionN position binary code, determines 2 described in applyingnThe coding rule that in cover mask ROM, a set of mask ROM is storedInformation.
In this infrared remote-controlled signal countdown circuit structure, this circuit structure has m cover mask ROM, described choosingSelect the user that application of logic circuit module comprises n position and select input, and m+n bit address bus, the user of described n position selectsInput and m cover mask ROM are all connected in described m+n bit address bus, and user is by the user of described n positionSelect input to utilize unified mask ROM address to determine a set of mask in the described m cover mask ROM of applicationThe coding rule information that read-only storage is stored.
Adopt the infrared remote-controlled signal countdown circuit structure of this invention, because it comprises at least two cover mask ROMsWith select application of logic circuit module, the mask ROM described in every cover all stores a set of coding rule information; Believe by controlNumber, user can utilize and select application of logic circuit module to select the coding rule information that wherein a set of mask ROM is stored,The coding rule information using as this infrared remote-controlled signal countdown circuit structure. Thereby can, by setting, easily willInfrared remote-controlled signal countdown circuit structure applications of the present invention, in various remote controllers, significantly reduces production costs and market windDanger, and infrared remote-controlled signal countdown circuit structure of the present invention is simple in structure, and range of application is also comparatively extensive.
Brief description of the drawings
Fig. 1 is typical infrared remote controller basic module structural representation in prior art.
Fig. 2 is the built-in high precision oscillator structural representation that in prior art, infrared remote controller adopts.
Fig. 3 is the structural representation of infrared remote-controlled signal countdown circuit structure of the present invention.
Fig. 4 is a kind of embodiment of the selection application of logic circuit module in infrared remote-controlled signal countdown circuit structure of the present inventionSchematic diagram.
Fig. 5 is the another kind enforcement side of the selection application of logic circuit module in infrared remote-controlled signal countdown circuit structure of the present inventionThe schematic diagram of formula.
Detailed description of the invention
In order more clearly to understand technology contents of the present invention, describe in detail especially exemplified by following examples.
Referring to shown in Fig. 3, is the structural representation of infrared remote-controlled signal countdown circuit structure of the present invention.
In one embodiment, this circuit structure comprises: oscillator, key scanning application of logic circuit module, at least two cover masks are onlyMemory read, selection application of logic circuit module, codimg logic circuit module and TL circuit module. Wherein:
Oscillator is in order to provide internal reference signal;
Key scanning application of logic circuit module connects respectively described oscillator and external remote keyboard, in order to move according to user key-pressProduce keyboard scan waveform signal;
Mask ROM described in every cover all stores a set of coding rule information, and every cover coding rule information includes separatelyIndependently pattern, systematic code and key set code;
Select application of logic circuit module to connect respectively the mask ROM described in each cover, in order to select wherein one according to control signalThe coding rule information that cover mask ROM is stored;
Codimg logic circuit module connects respectively described oscillator, key scanning application of logic circuit module and respectively overlaps mask ROM,In order to according to selected coding rule information, described keyboard scan waveform signal being encoded, produce and comprise control informationDigital output signal;
TL circuit module comprises N-type MOS transistor, and the channel width-over-length ratio of this N-type MOS transistor is greater than 1000,Its grid connects the digital output signal of described codimg logic circuit module, source ground, and it is infrared that drain electrode connects described outsideEmitter.
One preferred embodiment in, described outside infrared launcher is light emitting diode, described N-type MOSTransistorized drain electrode connects the negative electrode of described light emitting diode, the anodic bonding external power source of this light emitting diode.
In the preferred embodiment of one, as shown in Figure 4, described selection application of logic circuit module comprises user's choosing of n positionSelect input, this circuit structure has 2nCover mask ROM, user selects the input can by the user of described n positionInput n position binary code, determines 2 described in applyingnThe volume that in cover mask ROM, a set of mask ROM is storedCode Rule Information.
In the preferred embodiment of another kind, as shown in Figure 5, this circuit structure has m cover mask ROM, instituteThe selection application of logic circuit module of stating comprises that the user of n position selects input, and m+n bit address bus, the use of described n positionFamily selects input and m cover mask ROM to be all connected in described m+n bit address bus, and user is by described nThe user of position selects input to utilize unified mask ROM address to determine in the described m cover mask ROM of applicationThe coding rule information that a set of mask ROM is stored.
In actual applications, infrared remote-controlled signal countdown circuit structure of the present invention comprises:
As the built-in high precision oscillator of clock source, this oscillator comprise bias current generating circuit, generating circuit from reference voltage,Internal stability voltage generation circuit and oscillating circuit, can arrive required frequency ± 1% by accurate calibration;
Built-in large driving N metal-oxide-semiconductor, this NMOS tube source grade ground connection, grid connects the data signal output of coding circuit, leaksUtmost point open circuit. The breadth length ratio value of this NMOS pipe is larger, can reach thousands of, and the hundreds of mA electric currents while bearing circuit transmitting, useTime drain electrode connects outside infraluminescence LED, amplifies the data signal of grid input;
Many cover MASKROM and selection logic thereof, the independent preset pattern of every cover MASKROM, systematic code and key set code,A set of by selecting logic to select according to demand when use.
Select described in being achieved as follows of logic:
The user who comprises n position selects input, can be by outside input one group of n position 2 ary codes of regulation in advance. Comprise decoding electricityRoad, can be treated to the control signal to MUX by described n position binary code. Comprise 2nCover ROM, corresponding described nWhole combining forms of position binary code, and the address bus of each ROM is consistent. Select by exporting with ROM the multichannel being connectedWhat device was unique determines wherein one group of ROM, allows the data output of this cover ROM, inner other interrelated logics of control circuit.
Adopt above-mentioned method for designing selection logical construction use as shown in Figure 4, taking n=2 as example. I.e. 2 use of outside connectionPort is selected at family, can realize any one combination in " 00 " " 01 " " 10 " " 11 ", each group by the high and low level of inputBe combined in inside circuit all overlaps ROM wherein a set of output by decoding architecture control 4. Determine concrete with described MUXUse certain a set of ROM, and the data of this cover ROM are sent into counterlogic when needed.
Select the another kind of method for designing of logical construction to be: using the user selecting side of n position as described 2nThe address of cover ROM is totalThe high n of line position, with the former m bit address bus group cooperation of ROM be new n+m bit address bus. The output of all ROM is adoptedSend into inside circuit interrelated logic by same group of output channel. Adopt after this structure, be equivalent to address bus expansion, and by instituteHave ROM unified addressing, thereby realize, any time has and only have a set of ROM effectively to export.
Adopt this method for designing selection logical construction use as shown in Figure 5, taking n=2 as example. Outside circuit also can not useThe selection port of portion, but in circuit, make 2 fuses, in the time that fuse is communicated with, represent that one determines signal (as " 0 "); WhenAfter fuse failure, represent the inversion signal (as " 1 ") that fuse is communicated with. This 2 bit data is sent into each ROM in circuit subsequently, doesFor the selected ROM output of the highest 2 controls of address bus.
The infrared remote controller of prior art, what quantity required was larger concentrates on specific several pattern, therefore adopt ASIC(ApplicationSpecificIntegratedCircuit, special IC) design is with respect to adopting MCU to have obvious one-tenthThis advantage. But quantity required is less or the unsettled pattern of demand also needs supply, separately for its plate-making flow affects earning rate, andFor concrete certain user, the demand of its special time period is also uncertain, and this has just brought the difficulty on producer's stock. AdoptWith this programme can be in a circuit preset multiple ROM information, make the same circuit can be according to different user's requests,Reply flexibly, simultaneously for the producer, can obviously reduce the repeatedly cost of plate-making, and reduce stock's circuit kind,Reduce warehouse cost and user's request and change the overstocked risk causing. Built-in high precision oscillator and built-in large driving N metal-oxide-semiconductor are openedLeak output and also obviously reduced user's peripheral cell purchase cost.
Adopt the infrared remote-controlled signal countdown circuit structure of this invention, because it comprises at least two cover mask ROMsWith select application of logic circuit module, the mask ROM described in every cover all stores a set of coding rule information; Believe by controlNumber, user can utilize and select application of logic circuit module to select the coding rule information that wherein a set of mask ROM is stored,The coding rule information using as this infrared remote-controlled signal countdown circuit structure. Thereby can, by setting, easily willInfrared remote-controlled signal countdown circuit structure applications of the present invention, in various remote controllers, significantly reduces production costs and market windDanger, and infrared remote-controlled signal countdown circuit structure of the present invention is simple in structure, and range of application is also comparatively extensive.
In this description, the present invention is described with reference to its specific embodiment. But, still can make obviously variousAmendment and conversion and do not deviate from the spirit and scope of the present invention. Therefore, description and accompanying drawing should be considered to illustrative but not limitProperty processed.
Claims (7)
1. an infrared remote-controlled signal countdown circuit structure, is characterized in that, described circuit structure comprises:
Oscillator, in order to provide internal reference signal;
Key scanning application of logic circuit module, connects respectively described oscillator and external remote keyboard, in order to moving according to user key-pressMake to produce keyboard scan waveform signal;
At least two cover mask ROMs, the mask ROM described in every cover all stores a set of coding rule information;
Select application of logic circuit module, connect respectively the mask ROM described in each cover, in order to select wherein according to control signalThe coding rule information that a set of mask ROM is stored;
Codimg logic circuit module, connects respectively described oscillator, key scanning application of logic circuit module and respectively overlaps mask read-only storageDevice, in order to according to selected coding rule information, described keyboard scan waveform signal is encoded, produces to comprise and controls letterThe digital output signal of breath;
TL circuit module, connects described codimg logic circuit module and outside infrared launcher, described in basisDigital output signal control described in outside infrared launcher.
2. infrared remote-controlled signal countdown circuit structure according to claim 1, is characterized in that, described each cover is coveredThe coding rule information that film read-only storage is stored includes separately independently pattern, systematic code and key set code.
3. infrared remote-controlled signal countdown circuit structure according to claim 1, is characterized in that, described transmitting is patrolledCollect circuit module and comprise N-type MOS transistor, the grid of described N-type MOS transistor connects described codimg logic electricityThe digital output signal of road module, the source ground of described N-type MOS transistor, described N-type MOS transistorDrain electrode connects described outside infrared launcher.
4. infrared remote-controlled signal countdown circuit structure according to claim 3, is characterized in that described N-typeThe channel width-over-length ratio of MOS transistor is greater than 1000.
5. infrared remote-controlled signal countdown circuit structure according to claim 3, is characterized in that, described outside is redOuter emitter is light emitting diode, and the drain electrode of described N-type MOS transistor connects the negative electrode of described light emitting diode,The anodic bonding external power source of this light emitting diode.
6. according to the infrared remote-controlled signal countdown circuit structure described in any one in claim 1 to 5, it is characterized in that,Described selection application of logic circuit module comprises that the user of n position selects input, and this circuit structure has 2nCover mask ROM,User selects input can input n position binary code by the user of described n position, determines 2 described in applyingnCover mask read-onlyThe coding rule information that in memory, a set of mask ROM is stored.
7. according to the infrared remote-controlled signal countdown circuit structure described in any one in claim 1 to 5, it is characterized in that,This circuit structure has m cover mask ROM, and described selection application of logic circuit module comprises that the user of n position selects input,And m+n bit address bus, it is described that the user of described n position selects input and m cover mask ROM to be all connected inM+n bit address bus, user selects input to utilize unified mask ROM address true by the user of described n positionThe described m of fixed application overlaps the coding rule information that in mask ROM, a set of mask ROM is stored.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210499881.7A CN103856268B (en) | 2012-11-29 | 2012-11-29 | Infrared remote-controlled signal countdown circuit structure |
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| CN201210499881.7A CN103856268B (en) | 2012-11-29 | 2012-11-29 | Infrared remote-controlled signal countdown circuit structure |
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| CN103856268B true CN103856268B (en) | 2016-05-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29817164U1 (en) * | 1998-09-24 | 1998-12-17 | Veccom Co., Ltd., Chungli, Taoyuan | Audio / video multiple switch unit with primary and secondary image display, multiple inputs and multiple outputs |
| CN201166975Y (en) * | 2008-03-25 | 2008-12-17 | 中国华录集团有限公司 | Hard disk CD-rewritable with infrared remote-control forwarding function |
| CN101944285A (en) * | 2009-07-07 | 2011-01-12 | 无锡华润矽科微电子有限公司 | Remote control transmission processor circuit |
| CN201741277U (en) * | 2010-06-30 | 2011-02-09 | 厦门哈隆电子有限公司 | Voice chat remote controller |
| CN202362928U (en) * | 2011-12-06 | 2012-08-01 | 合肥合晶电子有限责任公司 | Infrared remote controller with touch screen |
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- 2012-11-29 CN CN201210499881.7A patent/CN103856268B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29817164U1 (en) * | 1998-09-24 | 1998-12-17 | Veccom Co., Ltd., Chungli, Taoyuan | Audio / video multiple switch unit with primary and secondary image display, multiple inputs and multiple outputs |
| CN201166975Y (en) * | 2008-03-25 | 2008-12-17 | 中国华录集团有限公司 | Hard disk CD-rewritable with infrared remote-control forwarding function |
| CN101944285A (en) * | 2009-07-07 | 2011-01-12 | 无锡华润矽科微电子有限公司 | Remote control transmission processor circuit |
| CN201741277U (en) * | 2010-06-30 | 2011-02-09 | 厦门哈隆电子有限公司 | Voice chat remote controller |
| CN202362928U (en) * | 2011-12-06 | 2012-08-01 | 合肥合晶电子有限责任公司 | Infrared remote controller with touch screen |
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Address after: 214135 -6, Linghu Avenue, Wuxi Taihu international science and Technology Park, Wuxi, Jiangsu, China, 180 Patentee after: China Resources micro integrated circuit (Wuxi) Co., Ltd Address before: No.180-22, Linghu Avenue, Taihu International Science and Technology Park, Wuxi, Jiangsu Province, 214000 Patentee before: WUXI CHINA RESOURCES SEMICO Co.,Ltd. |
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