CN202940812U - Infrared remote control signal transmission control circuit structure - Google Patents
Infrared remote control signal transmission control circuit structure Download PDFInfo
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- CN202940812U CN202940812U CN 201220645332 CN201220645332U CN202940812U CN 202940812 U CN202940812 U CN 202940812U CN 201220645332 CN201220645332 CN 201220645332 CN 201220645332 U CN201220645332 U CN 201220645332U CN 202940812 U CN202940812 U CN 202940812U
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- infrared remote
- circuit structure
- circuit module
- logic circuit
- controlled signal
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Abstract
The utility model relates to an infrared remote control signal transmission control circuit structure, which belongs to the technical field of circuit structure. The infrared remote control signal transmission control circuit structure comprises at least two mask read-only memories and a selection logic circuit module, a set of encoding rule information is stored in each of the at least two mask read-only memories, and a user can use the selection logic circuit module to choose the encoding rule information stored in one of the at least two mask read-only memories as the encoding rule information used by the infrared remote control signal transmission control circuit structure through a control signal. Thus, the infrared remote control signal transmission control circuit structure can be conveniently applied to all kinds of remote controllers through setting, the production cost and market risk are greatly reduced, and the infrared remote control signal transmission control circuit structure is simple in structure and has a wide range of applications.
Description
Technical field
The utility model relates to the circuit structure technical field, and particularly the control circuit technical field of structures, specifically refer to a kind of infrared remote-controlled 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, this mode possess skills maturation, realize that cost is low, directive property good, low-power consumption, without advantages such as electromagnetic interference, need the transmitting and receiving circuit work that is complementary.For realizing lower power consumption and matching effect, infrared remote control generally adopts specific signaling form, transmits with the data envelopment after modulation and the form of carrier combination.
In infrared remote controller, for realizing low-cost requirement, generally adopt built-in MASK ROM(mask ROM) in preset coding rule to realize the control to pattern, code value and code length thereof, can by revising the coding rule information in 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 circuit, MASK ROM and TL.Wherein clock circuit is used for providing stable clock frequency.Key scanning circuit produces the sweep waveform external connection keyboard, currently generally adopts tower keyboard.Codimg logic is the treatment circuit to the key scanning result, has button to press rear associative key scanning result, produces one group of waveform that is used for comprising specifying information according to the compiling of the information such as the pattern that presets in MASK ROM, code length.Information waveform and carrier combination that TL produces codimg logic produce the signal output that can be used for launching.
At present in other circuit, the structure of existing built-in high precision oscillator as shown in Figure 2, does not need the element such as external crystal oscillator can realize stable vibration.But adopt at present the circuit of built-in high precision oscillator need adopt submicron order technique, the expense of each plate-making flow significantly goes up, and one group of MASK ROM only can realize the key assignments of a kind of pattern and a cover button, in case the market situation fluctuation namely may cause larger loss.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, a kind of multiple pattern that comprises is provided, can be conveniently used in significantly reducing production costs and the market risk in various remote controllers, and infrared remote-controlled signal countdown circuit structure simple in structure, as to have wide range of applications.
In order to realize above-mentioned purpose, infrared remote-controlled signal countdown circuit structure of the present utility model has following formation:
This circuit structure comprises: oscillator, key scanning application of logic circuit module, at least two cover mask ROMs, selection application of logic circuit module, codimg logic circuit module and TL circuit module.Wherein, the key scanning application of logic circuit module connects respectively described oscillator and external remote keyboard; The described mask ROM of every cover all stores a cover coding rule information; Select application of logic circuit module to connect respectively and respectively overlap described mask ROM; The codimg logic circuit module connects respectively described oscillator, key scanning application of logic circuit module and respectively overlaps mask ROM; The TL circuit module connects described codimg logic circuit module and outside infrared launcher.
In this infrared remote-controlled signal countdown circuit structure, described TL circuit module comprises the N-type MOS transistor, the grid of described N-type MOS transistor connects the digital output signal of described codimg logic circuit module, the source ground of described N-type 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, 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.
In this infrared remote-controlled signal countdown circuit structure, described selection application of logic circuit module comprises that the user of n position selects input, and this circuit structure has 2
nThe cover mask ROM.
In this infrared remote-controlled signal countdown circuit structure, this circuit structure has m cover mask ROM, described selection application of logic circuit module comprises that the user of n position selects input, and m+n bit address bus, the user of described n position selects input and m cover mask ROM all to be connected in described m+n bit address bus.
Adopted the infrared remote-controlled signal countdown circuit structure of this utility model, because it comprises at least two cover mask ROMs and selects application of logic circuit module, the described mask ROM of every cover all stores a cover coding rule information; By control signal, the user can utilize the coding rule information of selecting application of logic circuit module to select a cover mask ROM wherein to store, the coding rule information of using as this infrared remote-controlled signal countdown circuit structure.Thereby can be by setting, easily with infrared remote-controlled signal countdown circuit structure applications of the present utility model in various remote controllers, significantly reduce production costs and the market risk, and infrared remote-controlled signal countdown circuit structure of the present utility model is simple in structure, and range of application is also comparatively extensive.
Description of 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 utility model.
Fig. 4 is the schematic diagram of a kind of execution mode of the selection application of logic circuit module in infrared remote-controlled signal countdown circuit structure of the present utility model.
Fig. 5 is the schematic diagram of the another kind of execution mode of the selection application of logic circuit module in infrared remote-controlled signal countdown circuit structure of the present utility model.
Embodiment
In order more clearly to understand technology contents of the present utility model, describe in detail especially exemplified by following examples.
See also shown in Figure 3ly, be the structural representation of infrared remote-controlled signal countdown circuit structure of the present utility model.
In one embodiment, this circuit structure comprises: oscillator, key scanning application of logic circuit module, at least two cover mask ROMs, selection application of logic circuit module, codimg logic circuit module and TL circuit module.Wherein:
Oscillator is in order to provide internal reference signal;
The key scanning application of logic circuit module connects respectively described oscillator and external remote keyboard, in order to action produces the keyboard scan waveform signal according to user key-press;
The described mask ROM of every cover all stores a cover coding rule information, and every cover coding rule information includes separately independently pattern, systematic code and key set code;
Select application of logic circuit module to connect respectively and respectively overlaps described mask ROM, in order to the coding rule information of selecting a cover mask ROM wherein to store according to control signal;
The 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 is encoded, produce the digital output signal that comprises control information;
The TL circuit module comprises the N-type MOS transistor, and the channel width-over-length ratio of this N-type MOS transistor is greater than 1000, and its grid connects the digital output signal of described codimg logic circuit module, source ground, and drain electrode connects described outside infrared launcher.
A kind of preferred embodiment in, described outside infrared launcher is light-emitting diode, 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.
In a kind of preferred execution mode, as shown in Figure 4, described selection application of logic circuit module comprises that the user of n position selects input, and this circuit structure has 2
nThe cover mask ROM, the user of user by described n position selects input can input n position binary code, determines to use described 2
nThe coding rule information that in the cover mask ROM, a cover mask ROM is stored.
In the preferred execution mode of another kind, as shown in Figure 5, this circuit structure has m cover mask ROM, described selection application of logic circuit module comprises that the user of n position selects input, and m+n bit address bus, the user of described n position selects input and m cover mask ROM all to be connected in described m+n bit address bus, and the user selects input to utilize the coding rule information that in the unified described m cover of the definite application in mask ROM address mask ROM, a cover mask ROM is stored by the user of described n position.
In actual applications, infrared remote-controlled signal countdown circuit structure of the present utility model comprises:
As the built-in high precision oscillator of clock source, this oscillator comprises bias current generating circuit, generating circuit from reference voltage, internal stability voltage generation circuit and oscillating circuit, but accurate calibration is to required frequency ± 1%;
Built-in large driving N metal-oxide-semiconductor, this NMOS tube source grade ground connection, grid connects the digital signal output of coding circuit, open-drain.The breadth length ratio value of this NMOS pipe is larger, can reach thousands of, the hundreds of mA electric currents when bearing the circuit emission, and during use, drain electrode connects outside infraluminescence LED, amplifies the digital signal of grid input;
Many cover MASK ROM and selection logic thereof, every cover MASK ROM independently presets pattern, systematic code and key set code, selectes a cover by selection logical foundation demand during use.
Select being achieved as follows of logic described:
The user who comprises the n position selects input, can be by outside input one group of n position 2 ary codes of regulation in advance.Comprise decoding circuit, described n position binary code can be treated to the control signal to MUX.Comprise 2
nCover ROM, whole combining forms of corresponding described n position binary code, and the address bus of each ROM is consistent.By the unique definite wherein one group of ROM of the MUX that is connected with ROM output, allow the data output of this cover ROM, inner other interrelated logics of control circuit.
Adopt above-mentioned method for designing the selection logical construction use as shown in Figure 4, take n=2 as example.Namely 2 users of outside connection select port, can be by any one combination in high and low level realization " 00 " " 01 " " 10 " of input " 11 ", and each is combined in inside circuit and controls 4 wherein cover outputs of overlapping ROM by decoding architecture.Determine the concrete a certain cover ROM of use with described MUX, and the data that will overlap ROM are sent into counterlogic when needed.
Select the another kind of method for designing of logical construction to be: with the user selecting side of n position as described 2
nThe high n of the address bus position of cover ROM, with the former m bit address bus group cooperation of ROM be new n+m bit address bus.The output of all ROM adopts same group of output channel to send into the inside circuit interrelated logic.After adopting this structure, be equivalent to the address bus expansion, and with all ROM unified addressing, thereby realize that any time has and only have a cover ROM effectively to export.
Adopt this method for designing the selection logical construction use as shown in Figure 5, take n=2 as example.Circuit also can not use outside selection port, but makes 2 fuses in circuit, and when fuse was communicated with, signal (as " 0 ") was determined in expression one; After fuse failure, the inversion signal (as " 1 ") that the expression fuse is communicated with.This 2 bit data is sent into each ROM in circuit subsequently, as the selected ROM output of the highest 2 controls of address bus.
The infrared remote controller of prior art, quantity required is larger concentrates on specific several pattern, therefore adopt ASIC(Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)) design is with respect to adopting MCU to have obvious cost advantage.But quantity required is less or the unsettled pattern of demand also need be supplied, and separately for its plate-making flow affects earning rate, and for concrete certain user, the demand of its special time period is also uncertain, and this has just brought the difficulty on producer's stock.Adopt this programme can preset multiple ROM information in a circuit, make the same circuit can be according to different user's requests, reply more flexibly, simultaneously for the producer, can obviously reduce the repeatedly cost of plate-making, and inventory reduction circuit kind, reduce warehouse cost and user's request and change the overstocked risk that causes.Built-in high precision oscillator and built-in large driving N metal-oxide-semiconductor are opened Lou, and output has also obviously reduced user's peripheral cell purchase cost.
Each functional module that infrared remote-controlled signal countdown circuit structure technology scheme of the present utility model is included and modular unit all can be corresponding to the particular hardware circuit in integrated circuit structure, therefore these modules and unit only utilize hardware circuit just can realize, do not need to assist namely can automatically realize corresponding function with specific control software.
Adopted the infrared remote-controlled signal countdown circuit structure of this utility model, because it comprises at least two cover mask ROMs and selects application of logic circuit module, the described mask ROM of every cover all stores a cover coding rule information; By control signal, the user can utilize the coding rule information of selecting application of logic circuit module to select a cover mask ROM wherein to store, the coding rule information of using as this infrared remote-controlled signal countdown circuit structure.Thereby can be by setting, easily with infrared remote-controlled signal countdown circuit structure applications of the present utility model in various remote controllers, significantly reduce production costs and the market risk, and infrared remote-controlled signal countdown circuit structure of the present utility model is simple in structure, and range of application is also comparatively extensive.
In this specification, the utility model is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (6)
1. an infrared remote-controlled signal countdown circuit structure, is characterized in that, described circuit structure comprises:
Oscillator;
The key scanning application of logic circuit module connects respectively described oscillator and external remote keyboard;
At least two cover mask ROMs;
Select application of logic circuit module, connect respectively and respectively overlap described mask ROM;
The codimg logic circuit module connects respectively described oscillator, key scanning application of logic circuit module and respectively overlaps mask ROM;
The TL circuit module connects described codimg logic circuit module and outside infrared launcher.
2. infrared remote-controlled signal countdown circuit structure according to claim 1, it is characterized in that, described TL circuit module comprises the N-type MOS transistor, the grid of described N-type MOS transistor connects the digital output signal of described codimg logic circuit module, the source ground of described N-type MOS transistor, the drain electrode of described N-type MOS transistor connects described outside infrared launcher.
3. infrared remote-controlled signal countdown circuit structure according to claim 2, is characterized in that, the channel width-over-length ratio of described N-type MOS transistor is greater than 1000.
4. infrared remote-controlled signal countdown circuit structure according to claim 2, it is characterized in that, described outside infrared launcher 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.
5. the described infrared remote-controlled signal countdown circuit of any one structure according to claim 1 to 4, 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 2n cover mask ROM.
6. the described infrared remote-controlled signal countdown circuit of any one structure according to claim 1 to 4, it is characterized in that, this circuit structure has m cover mask ROM, described selection application of logic circuit module comprises that the user of n position selects input, and m+n bit address bus, the user of described n position selects input and m cover mask ROM all to be connected in described m+n bit address bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645332 CN202940812U (en) | 2012-11-29 | 2012-11-29 | Infrared remote control signal transmission control circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645332 CN202940812U (en) | 2012-11-29 | 2012-11-29 | Infrared remote control signal transmission control circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940812U true CN202940812U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220645332 Expired - Lifetime CN202940812U (en) | 2012-11-29 | 2012-11-29 | Infrared remote control signal transmission control circuit structure |
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| Country | Link |
|---|---|
| CN (1) | CN202940812U (en) |
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2012
- 2012-11-29 CN CN 201220645332 patent/CN202940812U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
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: 214000 Jiangsu city of Wuxi province Wuxi Linghu Taihu International Science Park Road No. 180 -22 Patentee before: WUXI CHINA RESOURCES SEMICO Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
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| CX01 | Expiry of patent term |