CN204029128U - Dicode receiving circuit - Google Patents
Dicode receiving circuit Download PDFInfo
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- CN204029128U CN204029128U CN201420511475.2U CN201420511475U CN204029128U CN 204029128 U CN204029128 U CN 204029128U CN 201420511475 U CN201420511475 U CN 201420511475U CN 204029128 U CN204029128 U CN 204029128U
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- integrated circuit
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Abstract
Dicode receiving circuit, belong to electronic technology field, by receiving demodulation circuit, decoding integrated circuit, performance element, to a kind of dicode receiving circuit that the change decoding circuit of management and control forms jointly, the output of receiving demodulation circuit connects the input of decoding integrated circuit, first of decoding integrated circuit exports the change decoding circuit connected management and control, second of decoding integrated circuit exports and connects performance element, in an initial condition, first of decoding integrated circuit exports no-voltage, after reliable reception first time transmits, first of decoding integrated circuit exports and just produces high pressure, start and change code is carried out to the change decoding circuit of management and control, receive after second time transmits and just encourage performance element, the sequential of twice reception, can not be disorderly, achieve the reception that " suspension " and " 1 " code that radiating portion sends exchanges, good condition is created for realizing twice emitting, make remote control product possess superpower antijamming capability and crack ability with anti-, promote the performance of remote control product energetically.
Description
Technical field
Belong to electronic technology field.
Background technology
Society is improving, and science and technology is in development, and remote control product progressively replaces manual product, and particularly some senior anti-theft safety doors, have also used telecontrol engineering.
Remote control product, whether outstandingly determine by the level of confidentiality degree of encoding and remote control distance, level of confidentiality degree is high, crack difficulty, remote control distance is far away simultaneously, so remote control product is just outstanding, otherwise it is then poor, but reality be remote control product get more and more, these all become interference source, single code transmissions more than present transmitting, but coding is simple, easily cracked by people, easily by extraneous interference, therefore can not apply in some important products, single ripple dicode that our unit had once succeeded in developing multiple change code launches Decision Making of Line Schemes, good condition is provided to the level of confidentiality degree improving coding, but also need with it corresponding decoding technique just can become a complete entirety, receive and the matched well of launching, promote an outstanding key factor of remote control properties of product, therefore, according to the transmitting Decision Making of Line Schemes of the single ripple dicode applied for, the circuit that development dicode receives, for the extensive utilization of remote control product lays the first stone.
Summary of the invention
The fundamental purpose of this patent proposes a kind of new decoding scheme, form a kind of dicode receiving circuit, match with the single ripple dicode launch scenario applied for before our unit, realize the reception that " suspension " and " 1 " code that radiating portion sends exchanges, good condition is created for realizing twice emitting, make remote control product possess superpower antijamming capability and crack ability with anti-, promote the performance of remote control product energetically.
The measure that this patent proposes is:
1, dicode receiving circuit is by receiving demodulation circuit, decoding integrated circuit, performance element, jointly form the change decoding circuit of management and control.
Wherein: the output of receiving demodulation circuit connects the input of decoding integrated circuit, first of decoding integrated circuit exports the change decoding circuit connected management and control, and second of decoding integrated circuit exports and connects performance element.
The eight-level code of decoding integrated circuit connects the collector to second control triode in the change decoding circuit of management and control, and become and become code end, all the other 7 become fixed code.
Control triode to the change decoding circuit of management and control by two to form.
First of decoding integrated circuit connects the base stage that first controls triode after exporting and connecting trigger resistance, the grounded emitter of first control triode, second base stage controlling triode is connected on first collector controlling triode, second transmitting controlling triode connects power supply, between the emitter that resistance of sealing up a door is connected on second control triode and base stage, second collector controlling triode connects change code end.
2, decoding integrated circuit used is non-locking type.
3, first controls triode is NPN triode, and second controls triode is PNP triode.
4,8 bit code lines of decoding integrated circuit, any one is connected on the collector that second controls triode, can becomes and become code end.
5, the connection of 7 fixed code of decoding integrated circuit should be identical with the connection of the fixed code of integrated circuit of encoding in transmitting.
6, receiving demodulation circuit is beat reception demodulator circuit.
This measure is explained as follows further:
1, for the previous period, the cardinal principle that single ripple dicode that our unit develops is launched:
In the transmission, coding integrated circuit has 8 bit code positions, wherein 7 is fixed code, another one, for becoming code code, when launching, launch two subcategory numbers, wherein transmitter code is 7 fixed code for the first time, with the first subcategory number of the variation code of, the code that second time is launched is 7 constant fixed code, and the coded signal after the variation of a variation code.Corresponding with the receiving unit in the utility model, in decoding integrated circuit, 7 fixed code are identical with 7 fixed code of integrated circuit of encoding in transmitting, and the first time signal of variation code in decoding integrated circuit is " suspension ", coded signal after second time variation is " 1 ", and present receiving lines of the present utility model, reliably will can receive the variation code sent for the first time is exactly " suspension ", and second time signal is the signal of " 1 ".
2, in this measure, the structure of twice decoding of generation is: 7 bit codes in integrated 8 bit codes of decoding have been connected into fixed code (03 in Fig. 1), a wherein bit code is become receipts twice signal is a kind of changes code (04 in Fig. 1).When original state, the code bit wherein originally presented all the time for displacement code bit is the stationary state of " suspension ", and generation change code just produces after receiving signal.Decoding integrated circuit in the present invention has two output terminals, wherein first output terminal (05 in Fig. 1), and being also called is automatic changing code control end, and the output of this end is connected with to the change decoding circuit of management and control.Another one is that second exports (07 in Fig. 1), and also known as the output terminal to rear class, this output rear class is connected, and is directly export decoded result at the corresponding levels.The structure of this circuit can realize the present invention and receive the requirement becoming code.In above-mentioned line construction, the connected electronic switch of the first output is called the change decoding circuit to management and control.
3, become code to produce the reason that " suspension " state and one state exchange and be: when decode integrated first export no-output into zero time, first controls transistor base no-voltage, because NPN triode has inverting function, so its current collection is very high-order, second controls the base stage of triode because be high-order, so second controls the collector no-output of triode, second controls the change code end that transistor collector connects and did not both connect power supply and ground wire, be " suspension " shape.Otherwise when integrated first output no-output of decoding is high, first is made to control triode ON, first controls transistor collector is low level, second controls the base stage of triode because being biased of existing, export so its collector exists, second controls the change code end that connects of transistor collector for a high position, is one state, thus to achieve by " suspension " state transformation be one state.
4, the single ripple dicode once applied for our unit invents the decoding principle matching and produce:
This circuit produces four kinds of functions and corresponding principle:
(1) receive the first subcategory number of sending of radiating portion principle: as in Fig. 2, under original state, first of decoding integrated circuit exports no-voltage, first controls transistor base no-voltage, because NPN triode has inverting function, so its current collection is very high-order, second controls the base stage of triode because be high-order, make second to control triode to seal up a door, so the collector no-output of second control triode, second controls the change code end that connects of transistor collector and did not both connect power supply and ground wire, for " suspension " shape, at this moment 7 fixed code can not only reliably be received, the state that radiating portion becomes " suspension " that code bit first time sends can be received simultaneously.Namely with radiating portion first signal " suspension " sending out corresponding because its principle does not run counter to the performance of existing product.
(2) receive the second subcategory number of sending of radiating portion principle: after receiving the first signal sent, at this moment encode integrated circuit first output terminal export 1 signal, first is made to control triode ON, first controls transistor collector is low level, second controls the base stage of triode because being biased of existing, export so its collector exists, second controls the change code end that connects of transistor collector for a high position, for one state, to become coded signal " 1 " corresponding with the second time of radiating portion, thus second change coded signal that radiating portion sends can be received.
(3) receive twice change code and have the strict demand of sequential and principle: twice signal sequence requiring radiating portion to launch of the present invention has strict demand, (main cause be criminal commit a crime difficulty) can not be disorderly.Its reason is that after only having first time to launch correct code " suspension ", the decoding integrated circuit in the present invention first output just has output, thus makes the decoding integrated circuit in the present invention produce the new code of " 1 ".Cause the reception of second time signal.If instead criminal is the signal first launching second time " 1 ", now because the code of decoding integrated circuit of the present invention is in the state of " suspension ", does not meet with transmitter code, do not have output.So twice signal that radiating portion sends has strict timing requirements.
(4), there is reception time limit requirement, (its benefit greatly can improve the ability of cracking) principle: the transient state output type coding integrated circuit that its decoding integrated circuit adopts in this measure, its benefit is, coding integrated circuit is after receiving the signal sent for the first time, first output terminal has high-order output, but be not permanent, second time signal can only be received time of short duration, otherwise from action expense.Need again to receive first time signal, could secondary signal be received.Thus to crack and must form four factor.Thus the level of confidentiality cracked is greatly increased.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, achieving the reception that " suspension " and " 1 " code that radiating portion sends exchanges, creating good condition for realizing twice emitting, remote control product the is possessed highly difficult anti-ability of cracking and antijamming capability, improve the performance of remote control product energetically.
If 2 with the combination again of rolling code circuit, it decodes difficulty is superpower, because rolling code is the coding of a class character, and in this measure, dicode transmitting is the coding of a class character, two kinds of coded combinations of different nature are larger than a kind of code breaks difficulty of character.
3, the dicode receiving lines of this measure receives reliable:
Its reason is that the decoding integrated circuit fixed code in the present invention conforms to completely with the fixed code of radiating portion.And the change code part received, signal code is " suspension " for the first time, and the code of second time signal is " 1 ", and the twice change code sent with radiating portion definitely conforms to, and signal is " suspension " for the first time, and second signal is also " 1 ".Have followed the rule of this kind of coder and decoder ic completely.Another very important reason is, what the decoding in receiving lines in the present invention realized is " tracking system ", that is to say after receiving first change code " suspension ", just automatically becomes the code " 1 " needed for second time, twice receiving course is not disorderly, onside.
4, crack very difficult: mainly contain three reasons, one is to have twice different code could realize decoding, just has output.Two is that different code needed for twice has timing requirements, can not be disorderly, 3rd major reason is, the requirement that this twice different change codes is also necessary free when launching, because the integrated output of the coding adopted in the present invention is the transient state output type adopted, in other words after receiving signal, its output can only remain a transient state high position, will disappear after blink.If criminal, after correct code is made in exploration in first time, want that within the very of short duration time, feel out the correct code of second time is more obviously very difficult.Also be that criminal wants to crack the present invention must by three passes: one is must twice different dicode, and two is also must have sequential, and three is also must be limited within the very short time just can complete, and therefore adopts " the barcode scanning instrument " of crime to crack and hardly may.From in a certain respect, higher than rolling code, because crack rolling code in theory, there is certain probability in this level of confidentiality, and just this probability is very low, very low, and the present invention is because exist the above-mentioned three elements that crack, and this to crack probability just lower.
5, circuit is reliable, and one is that circuit is simplified.
6, produce easily, one be need not be valuable equipment and instrument, two is that technology is simple, and three are that circuit is simplified and component requirements used is low, so can produce very high first-pass yield, very applicable microbusiness produces.
Accompanying drawing explanation
Fig. 1 is total measure figure of dicode receiving circuit.
In figure: 01, beat reception demodulator circuit; 02, decoding integrated circuit; 03, the fixed code of decoding integrated circuit; 04, the change code end of decoding integrated circuit; 05, second of decoding integrated circuit export; 06, performance element; 07, first of decoding integrated circuit export; 08, to the change decoding circuit of management and control.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 01, beat reception demodulator circuit; 02, decoding integrated circuit; 03, the fixed code of decoding integrated circuit; 04, the change code end of decoding integrated circuit; 05, second of decoding integrated circuit export; 06, performance element; 07, first of decoding integrated circuit export; 09, trigger resistance; 010, first controls triode; 011, to seal up a door resistance; 012, second controls triode.
Embodiment
Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.
1, select element: wherein decoding integrated circuit selects 2272, first controls triode is NPN triode, and second controls triode is PNP triode.
2, weld: weld by Fig. 2.
3, Detection and adjustment:
(1) adjustment, to original state: the requirement withstand voltage according to decoding integrated circuit, second emitter controlling triode is connected on the live wire of decoding integrated circuit.
(2), to duty adjustment and detection: adjust peripheral power supply resistance, when decoding integrated circuit is not when receiving first signal, first current collection controlling triode is very high-order, so the collector no-output of second control triode, otherwise when the first output terminal of decoding integrated circuit has a high position to export, second collector controlling triode has high-order output, otherwise should adjust resistance of sealing up a door.
(3) Function detection, to the change code end of decoding integrated circuit: when launching first time signal, decoding integrated circuit energy reliable reception: when having multimeter to survey, the first output terminal has high-order output.
(it is correct that 4) detect the reception connecing twice signal: coding integrated circuit is after receiving the first signal, and secondary signal of fasting ejection very much, the high position that integrated circuit second of at this moment encoding exports oriented rear class exports.Have voltage to export when having multimeter to survey this, if when adopting oscillograph, display screen has high-order reaction.
(5) Received signal strength whether sequential, is detected: the second output terminal multimeter or oscillograph being received decoding integrated circuit, if first launch secondary signal, now decoding integrated circuit second exports without high pressure, if there is high pressure, should resistance of sealing up a door be adjusted, or change control triode.
(6) whether be non-interlocking type: first output and second of multimeter or oscillograph being received decoding integrated circuit exports to be observed if, detecting decoding integrated circuit, after receiving signal, within the time of short duration, signal can disappear, otherwise the model of the integrated circuit that should alternate coding.
Claims (6)
1. dicode receiving circuit, is characterized in that: by receiving demodulation circuit, decoding integrated circuit, performance element, jointly form the change decoding circuit of management and control:
Wherein: the output of receiving demodulation circuit connects the input of decoding integrated circuit, first of decoding integrated circuit exports the change decoding circuit connected management and control, and second of decoding integrated circuit exports and connects performance element;
The eight-level code of decoding integrated circuit connects the collector to second control triode in the change decoding circuit of management and control, and become and become code end, all the other 7 become fixed code;
Control triode to the change decoding circuit of management and control by two to form;
First of decoding integrated circuit connects the base stage that first controls triode after exporting and connecting trigger resistance, the grounded emitter of first control triode, second base stage controlling triode is connected on first collector controlling triode, second transmitting controlling triode connects power supply, between the emitter that resistance of sealing up a door is connected on second control triode and base stage, second collector controlling triode connects change code end.
2. dicode receiving circuit according to claim 1, is characterized in that: decoding integrated circuit used is non-locking type.
3. dicode receiving circuit according to claim 1, is characterized in that: first controls triode is NPN triode, and second controls triode is PNP triode.
4. dicode receiving circuit according to claim 1, is characterized in that: 8 bit code lines of decoding integrated circuit, and any one is connected on the collector that second controls triode, can becomes and become code end.
5. dicode receiving circuit according to claim 1, is characterized in that: the connection of 7 fixed code of decoding integrated circuit should be identical with the connection of the fixed code of integrated circuit of encoding in transmitting.
6. dicode receiving circuit according to claim 1, is characterized in that: receiving demodulation circuit is beat reception demodulator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511475.2U CN204029128U (en) | 2014-09-08 | 2014-09-08 | Dicode receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511475.2U CN204029128U (en) | 2014-09-08 | 2014-09-08 | Dicode receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204029128U true CN204029128U (en) | 2014-12-17 |
Family
ID=52068964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420511475.2U Expired - Fee Related CN204029128U (en) | 2014-09-08 | 2014-09-08 | Dicode receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204029128U (en) |
-
2014
- 2014-09-08 CN CN201420511475.2U patent/CN204029128U/en not_active Expired - Fee Related
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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: 20141217 Termination date: 20150908 |
|
| EXPY | Termination of patent right or utility model |