CN204031149U - A kind of single ripple dicode receiving system - Google Patents
A kind of single ripple dicode receiving system Download PDFInfo
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- CN204031149U CN204031149U CN201420518572.4U CN201420518572U CN204031149U CN 204031149 U CN204031149 U CN 204031149U CN 201420518572 U CN201420518572 U CN 201420518572U CN 204031149 U CN204031149 U CN 204031149U
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Abstract
A kind of single ripple dicode receiving system, belong to telecontrol engineering field, by receiving demodulation circuit, decoding integrated circuit, performance element, change-over circuit tubular type 0 being become to 1 forms jointly, in an initial condition, first of decoding integrated circuit exports no-voltage, it is identical that change code end and the launching code of decoding integrated circuit become code end, receive after transmitting for the first time, first of decoding integrated circuit exports and just produces high pressure, startup forms change code to the change-over circuit that tubular type 0 becomes 1, become and become the corresponding code bit of coded signal with transmitting second time, second time signal could be received, performance element could be encouraged, realize the reception that " 0 " and " 1 " code that radiating portion sends exchanges, good condition is created for realizing twice emitting, remote control product is allowed to have more wide development space.
Description
Technical field
Belong to telecontrol engineering field.
Background technology
The quality of remote control product quality, determined by the level of confidentiality degree of encoding, good remote control product but still cannot apply in the important security personnel's equipment in family, as anti-theft safety door, this is because remote control also fails to reach higher in level of confidentiality, result in remote control product can not use widely, how to improve remote control level of confidentiality degree, this is problem the most in the urgent need to address, from present technical merit, present coding integrated circuit, a kind of be higher gears take rolling code as the kind of representative, the advantage of this adhesive integrated circuit is that coding is complicated, crack difficulty, but price, technical difficulty is large simultaneously.Another kind of is the coding being encoded to three kinds of states, as 2262 with the coding integrated circuit kind of representative, this kind of integrated advantage is that price is low, so the product made has very large price competitiveness, wide market, but shortcoming due to simple close pole of encoding not high, so can not be widely used in the higher product of requirement.
Our unit had once been developed into the radiating circuit scheme of multiple energy conversion code for the previous period, the competitiveness improving product is had a very big significance, solves above-mentioned problem, but also need to receive the receiving circuit becoming code, could become with it as a whole, therefore now also need further development.
Summary of the invention
Main purpose of the present utility model proposes a kind of decoding circuit, create the receiving lines that can receive change code to match with the single ripple dicode launch scenario applied for before our unit, realize the reception that " 0 " and " 1 " code that radiating portion sends exchanges, good condition is created for realizing twice emitting, promote the level of confidentiality degree of the integrated circuit of tri-state coding class energetically, reduce product cost, remote control product can be used widely.
Measure of the present utility model is:
1, a kind of single ripple dicode receiving system is made up of jointly receiving demodulation circuit, decoding integrated circuit, performance element, the change-over circuit that tubular type 0 become to 1.
Wherein: the output of receiving demodulation circuit connects the input of decoding integrated circuit, first of decoding integrated circuit exports connection becomes 1 change-over circuit to tubular type 0, and second of decoding integrated circuit exports and connects performance element.
Decoding integrated circuit has 8 bit code positions, wherein has 7 for fixed code, and another one is variation code, namely becomes code end.
Change-over circuit tubular type 0 being become to 1 is made up of NPN triode, PNP triode, resistance.
Resistance has source resistance, becomes code termination earth resistance, upper inclined resistance, lower inclined resistance.
First of decoding integrated circuit exports and connects the base stage of NPN at pole pipe, between the collector electrode that source resistance is connected on NPN triode and power supply, the base stage of PNP triode is connected on the collector electrode of NPN triode, upper inclined resistance is gone here and there mutually with lower inclined resistance, its series connection point connects the transmitting of PNP triode, the collector electrode of PNP triode connects variation end, becomes code termination earth resistance.
2, decoding integrated circuit used is non-locking type.
3, 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.
4, resistance is the resistance of 1/8 watt.
5, receiving demodulation circuit is superhet 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, and another one becomes code end, namely changes code, when launching, launch two subcategory numbers, wherein transmitter code is 7 fixed code for the first time, and 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 " 0 ", 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 " 0 ", 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 initial condition, the code bit wherein originally presented all the time for displacement code bit is the stationary state of " 0 ", and generation change code just produces after receiving signal.Decoding integrated circuit in the present invention has two outputs, wherein first output (07 in Fig. 1), and being also called is automatic changing code control end, and the output of this end is connected with change-over circuit tubular type 0 being become to 1.Another one is that second exports (05 in Fig. 1), and also known as the output 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, first exports connected circuit is called change-over circuit tubular type 0 being become to 1.
3, become code to produce 0 and 1 reason of exchanging and be: when decoding integrated circuit first export no-output into zero time, the NPN transistor base no-voltage connected, its current collection is very high-order, the base stage of PNP triode is because high-order, so its collector electrode no-output, but because connected change code end is connected to earth resistance, institute thinks low level.Otherwise when integrated first output no-output of decoding is high, the NPN transistor base connected has voltage, its current collection very low level, and the base stage of PNP triode is because being biased of existing, so its collector electrode exists output, the change code end connected is high-order.Thus, the change-over circuit becoming 1 to tubular type 0 achieves the conversion of 0 and 1.
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 initial condition, first of decoding integrated circuit exports no-voltage, the NPN transistor base no-voltage connected, its current collection is very high-order, the base stage of PNP triode is because high-order, so its collector electrode no-output, but because connected change code end is connected to earth resistance, institute thinks low level, with radiating portion first signal " 0 " sending out corresponding because its principle does not run counter to the performance of existing product, so the first time signal launched can be received.
(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 export 1 signal, the NPN transistor base connected has voltage, trigger NPN triode, current collection is low level very, the base stage of PNP triode is because being biased of existing, export so its collector electrode exists, the change code end connected is into high-order, to become coded signal " 1 " corresponding with the second time of radiating portion, thus can receive second that radiating portion sends and become coded signal.
(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 " 0 ", 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 first launches secondary signal, now because the code of decoding integrated circuit of the present invention is in the state of low level " 0 ", do 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 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.
5, PNP triode launches the effect of upper inclined resistance and the lower inclined resistance connect: mainly form dividing potential drop relation, to adapt to the voltage needed for different coding integrated circuit, two is can adjust coding integrated first flexibly to export as time high-order, causes the reverse bias to this pipe.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, realize the reception that " 0 " and " 1 " code that radiating portion sends exchanges, creating good condition for realizing twice emitting, while the various electrical equipment interference of resistance, improving level of confidentiality degree, and reduce product cost, allowing remote control product have more wide development space.
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 " 0 " 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 " 0 " 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 that just automatically become the code " 1 " needed for second time, twice receiving course is not disorderly, onside after receiving first change code " 0 ".
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 minuscule-type-enterprise produces.
Accompanying drawing explanation
Fig. 1 is a kind of total measure figure of single ripple dicode receiving system.
In figure: 01, receiving demodulation 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, tubular type 0 is become to the change-over circuit of 1.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 01, receiving demodulation 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, NPN triode; 010, source resistance; 011, PNP triode; 012, upper inclined resistance; 013, lower inclined resistance; 014, code termination earth resistance is become.
Embodiment
Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.
1, element is selected: wherein decoding integrated circuit selects 2272, NPN triode and PNP triode all to select low power transistor.
2, weld: weld by Fig. 2.
3, Detection and adjustment:
(1), to operating state adjustment and detection: when decoding integrated circuit is not when receiving first signal, becoming code end is low level, otherwise when the first output of decoding integrated circuit has a high position to export, become code end to export into high-order, otherwise should adjust and become code termination earth resistance, or adjustment above inclined resistance and lower inclined resistance.
(2) Function detection, to decoding integrated circuit automatic changing code bit line: when launching first time signal, decoding integrated circuit energy reliable reception: when having universal instrument to survey, the first output has high-order output.
(3), the reception connecing twice signal is detected correct: decoding integrated circuit is after receiving the first signal, and secondary signal of fasting ejection very much, at this moment decoding integrated circuit second exports the high position output of oriented rear class.Have voltage to export when having universal instrument to survey this, if when adopting oscilloscope, display screen has high-order reaction.
(4), detect Received signal strength whether sequential: the second output universal instrument or oscilloscope 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 adjust change code termination earth resistance.
(5) whether be non-interlocking type: first output and second of universal instrument or oscilloscope 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 should change the model of decoding integrated circuit.
Claims (5)
1. a single ripple dicode receiving system, is characterized in that: be jointly made up of receiving demodulation circuit, decoding integrated circuit, performance element, the change-over circuit that tubular type 0 become to 1:
Wherein: the output of receiving demodulation circuit connects the input of decoding integrated circuit, first of decoding integrated circuit exports connection becomes 1 change-over circuit to tubular type 0, and second of decoding integrated circuit exports and connects performance element;
Decoding integrated circuit has 8 bit code positions, wherein has 7 for fixed code, and another one is variation code, namely becomes code end;
Change-over circuit tubular type 0 being become to 1 is made up of NPN triode, PNP triode, resistance;
Resistance has source resistance, becomes code termination earth resistance, upper inclined resistance, lower inclined resistance;
First of decoding integrated circuit exports and connects the base stage of NPN at pole pipe, between the collector electrode that source resistance is connected on NPN triode and power supply, the base stage of PNP triode is connected on the collector electrode of NPN triode, upper inclined resistance is gone here and there mutually with lower inclined resistance, its series connection point connects the transmitting of PNP triode, the collector electrode of PNP triode connects variation end, becomes code termination earth resistance.
2. one according to claim 1 single ripple dicode receiving system, is characterized in that: decoding integrated circuit used is non-locking type.
3. one according to claim 1 single ripple dicode receiving system, 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.
4. one according to claim 1 single ripple dicode receiving system, is characterized in that: resistance is the resistance of 1/8 watt.
5. one according to claim 1 single ripple dicode receiving system, is characterized in that: receiving demodulation circuit is superhet demodulator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420518572.4U CN204031149U (en) | 2014-09-11 | 2014-09-11 | A kind of single ripple dicode receiving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420518572.4U CN204031149U (en) | 2014-09-11 | 2014-09-11 | A kind of single ripple dicode receiving system |
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| CN204031149U true CN204031149U (en) | 2014-12-17 |
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| CN201420518572.4U Expired - Fee Related CN204031149U (en) | 2014-09-11 | 2014-09-11 | A kind of single ripple dicode receiving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921783A (en) * | 2017-12-12 | 2019-06-21 | 华润矽威科技（上海）有限公司 | Tri-state inputs decoding circuit and its coding/decoding method |
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2014
- 2014-09-11 CN CN201420518572.4U patent/CN204031149U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921783A (en) * | 2017-12-12 | 2019-06-21 | 华润矽威科技（上海）有限公司 | Tri-state inputs decoding circuit and its coding/decoding method |
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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: 20150911 |
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| EXPY | Termination of patent right or utility model |