CN204304998U - A kind of transient state type biswitch formula receiving circuit - Google Patents
A kind of transient state type biswitch formula receiving circuit Download PDFInfo
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- CN204304998U CN204304998U CN201420526122.XU CN201420526122U CN204304998U CN 204304998 U CN204304998 U CN 204304998U CN 201420526122 U CN201420526122 U CN 201420526122U CN 204304998 U CN204304998 U CN 204304998U
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Abstract
A kind of transient state type biswitch formula receiving circuit, belong to areas of information technology, by radio frequency reception demodulator circuit, decoding integrated package, interlocking unit, performance element, the automatic transcoding units of biswitch type forms jointly, decoding integrated package has four outputs, the output connected with the automatic transcoding units of biswitch type is for become code control end, the last output exported as integrated package of decoding is connected on mutually with performance element, all the other two outputs connect with interlocking unit, under original state, becoming code control end is low level, receive after transmitting for the first time, become code control end and export high pressure, start the automatic transcoding units of biswitch type and carry out change code, receive after second time transmits and just start performance element, and integrated package of decoding is transient state type, so possessed the timing that receives and ageing, export as time high-order at garbled-reception or multidigit, interlocking unit starts, locking performance element and the automatic transcoding units of biswitch type, possesses the uniqueness exported, considerably increase the anti-ability cracked.
Description
Technical field
Belong to areas of information technology.
Background technology
Telecontrol engineering, coding is an important link, the accuracy of signal transmission when its direct relation remote control, distance of remote control distance etc., so therefore there is rolling code in market, this code changes often by certain rule, therefore the first-selection of some high-end products is become, shortcoming is selling at exorbitant prices, technical difficulty is large, this is obviously not suitable for medium-sized and small enterprises, and another kind is with the coding of three kinds of states, as 2262 is 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, be suitable for middle-size and small-size minuscule-type-enterprise, but shortcoming is that the simple close pole of coding is not high, so can not be widely used in the higher product of requirement.
Single ripple dicode that our unit once have developed 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 main purpose of this patent is the dicode receiving circuit scheme that a kind of single ripple dicode launch scenario once can applied for our unit of proposition matches, realize the reception of twice change code of " 0 " and " suspension " code that radiating portion sends, good condition is created to the research of twice emitting, after enforcement, one is the signal that can receive two kinds of codes, two is receive to have sequential, first signal unique for the first time can only be received, then second time signal could be received, three is unique property with output, four is validity sometimes when receiving, significantly increase the difficulty having cracked and decoded, this telecontrol engineering, be very suitable for middle-size and small-size minuscule-type-enterprise.
The measure that this patent proposes is:
1, a kind of transient state type biswitch formula receiving circuit is made up of jointly radio frequency reception demodulator circuit, decoding integrated package, interlocking unit, performance element, the automatic transcoding units of biswitch type.
Wherein: the automatic transcoding units of biswitch type is made up of integrated circuit bilateral analog switch: there are four independently analog switches integrated circuit bilateral analog switch inside, the negative pole of the control end connection control diode of first analog switch, control the change code control end connecing decoding integrated package after the positive pole of diode connects isolation resistance, the input end grounding line of first analog switch, the output of control termination first analog switch of second analog switch, control termination source resistance of second analog switch, the input termination power of second analog switch, the output of second analog switch becomes the output of the automatic transcoding units of biswitch type, connect the change code end of decoding integrated package.
Decoding integrated package has 8 bit code lines, four outputs, and wherein 7 bit codes in 8 bit lines connect for fixed code, and another bit code is connected with the output of the automatic transcoding units of biswitch type, becomes variation code, namely becomes code end.
Decoding integrated package has four outputs, and the output wherein connected with the automatic transcoding units of biswitch type is for become code control end, and the output connected with performance element is the last output of integrated package of decoding, and all the other two outputs connect with interlocking unit.
Performance element is made up of with executive circuit current-limiting resistance: one end of current-limiting resistance is connected the last output of decoding integrated package, and the other end of current-limiting resistance connects the input of executive circuit.
Interlocking unit by or gate diode, phase inverter, clamp diode form.
Decoding integrated package has four outputs, wherein the second output exports with the 4th the positive pole being connected or gate diode respectively, or the negative pole of gate diode is connected together and connects the input of phase inverter, the output of phase inverter connects the negative pole of two clamp diodes, and wherein first clamp diode connects with the base stage controlling triode in the automatic transcoding units of biswitch type; Second clamp diode connects with the input of executive circuit in performance element.
2, integrated package of decoding is transient state type.
3, clamp diode and or gate diode be both face fit type diode.
This measure is explained as follows further:
One, for the previous period, the cardinal principle that single ripple dicode that our unit develops is launched:
In 8 bit codes of coding integrated circuit, wherein 7 is fixed code, wherein one is variation code, radiating portion is when launching, launch two subcategory numbers, wherein transmitter code is 7 fixed code wherein 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.And the receiving unit that the present invention matches receives 7 fixed code in first time transmitter code and subcategory number change code, receive 7 fixed code in second time transmitter code and the quadratic code changing code, after twice reception, just have last output, startup rear class.
Two, the principle producing twice decoding is: decoding integrated package has 8 bit codes, 7 bit codes are wherein connect in order to fixed code (3 in Fig. 2), corresponding with 7 fixed code of integrated circuit of encoding in transmitting, remaining bit code becomes the change code (4 in Fig. 2) of reception twice signal, the variation code of decoding integrated package is corresponding with the variation code of coding integrated circuit, when original state, because decoding integrated package does not also receive signal, therefore all outputs of integrated package of decoding are low level, and the automatic transcoding units of biswitch type connected with change code control end does not also start, what at this moment receive is transmit first time, and have received first time transmit after, become code control end into high-order, start the automatic transcoding units of biswitch type and form change code, thus reception second time transmits, performance element could be started after twice Signal reception.
Decoding integrated package has four outputs, the output wherein connected with the automatic transcoding units of biswitch type, be also called and become code control end, this end directly controls to become code, the output connected with performance element is last output, directly export decoded result at the corresponding levels, thus fill order, all the other two outputs connect interlocking unit, be at garbled-reception or make all outputs of decoding integrated package for just having output time high-order by mistake, start interlocking unit, the automatic transcoding units of locking biswitch type and performance element.
Three, this measure can produce four kinds of functions after implementing: one is the signal that can receive two kinds of codes, two is receive to have sequential, first signal unique for the first time can only be received, then second time signal could be received, three is unique property with output, four is validity sometimes when receiving, owing to adding four kinds of important restrictions, so significantly increase the difficulty having cracked and decoded.
1, the reason receiving two coded signals is can transcoding voluntarily, and its principle is:
(1) receive the first subcategory number of sending of radiating portion principle: as shown in Figure 2, because become code control end (8 in Fig. 2) no-output, the control end making first analog switch (20 in Fig. 2) is low level, so first analog switch is off state, the control end of second analog switch (23 in Fig. 2) has source resistance (22 in 2), so under the state of first analog switch disconnection, second analog switch connects, due to the input termination power supply of second analog switch, therefore its output also equals to have connected power supply, thus the change code end of decoding integrated package is also connected power supply, for one state, corresponding with a subcategory number of the variation code of integrated circuit of encoding in transmitting, so first signal that radiating portion sends can be received.
(2) receive the second subcategory number of sending of radiating portion principle: after receiving the first signal sent, at this moment decode integrated package change code control end export 1 signal, this signal makes first analog switch be on-state, due to the input termination ground wire of first analog switch, therefore the control end of second analog switch is also equivalent to connect ground wire is low level, second analog switch is caused to disconnect, it exports neither earth connection also missed electric source, in suspended state, the variation code of thus connected decoding integrated package is also suspension, corresponding with the quadratic code of the variation code of integrated circuit of encoding in transmitting, so second time coded signal can be received.
2, receive the sequential that has that twice change code must have successively to limit and principle: because the original state of the variation code of coding integrated circuit is " 1 ", so the variation code of decoding integrated package also only be " 1 " in original state state under could normal reception, the variation code of decoding integrated package just can be caused to change the new code of suspension into, and this new code is corresponding with the new code of transmitting, the last output of decoding integrated package just can be made to have high pressure, could performance element be started.Otherwise radiating portion is if first launching is secondary " suspension " signal, and the variation code of integrated package of now decoding is that under original state, " 1 " code and transmitter code do not meet, the last output connecting performance element does not have output.More than analyze, if cracker is first the second subcategory number crack code, but because the first subcategory number is not opened, the clamp diode (15 in Fig. 2) becoming code control end clamper performance element works, and to performance element still clamper, only has after the first subcategory number is opened, the second subcategory number could be received, two subcategory numbers correctly just can have last output, and the output that integrated package of namely decoding connects performance element has voltage, could start performance element.
3, there is the principle of benefit that bit line uniquely receives and formation: in measure 1, add interlocking unit, its benefit is when criminal is when cracking, and the bit line determined is wrong, then completely without output, therefore cannot crack.Its reason one only has to become code bit line correctly, and what second time just may be had to receive is correct, otherwise can not normal reception.Two is that the bit line only exported to rear class exports correctly, last output is just had when two subcategory numbers are correct, three is if when multidigit output has output or receives mistake simultaneously, because the input of phase inverter becomes or door, form interlocking, inverter output is low level, second clamp diode, the i.e. diode (16 in Fig. 2) of interlocking unit clamper performance element, first clamp diode, namely the diode (17 in Fig. 2) of the automatic transcoding units of interlocking unit clamper biswitch type works, to performance element, the automatic transcoding units of biswitch type has carried out clamper, so formation performance element, the automatic transcoding units of biswitch type cannot start.
4, the principle of twice receiving code validity sometimes: be the transient state type selected because decoding integrated package exports, so criminal can not be allowed to crack the more time, also be that the first subcategory number cracks successfully, second subcategory number must provide in the very short time, otherwise invalid, two subcategory numbers must be restarted.
Four, the bilateral analog switch used in measure 1 is CD4066, and there are 4 independently switches inside, and the crosstalk of each switch room is very little, and representative value is-50dB.When control end adds high level, switch conduction, conduction impedance is lower, and in addition, conduction impedance is substantially constant in whole input reference signal.Eliminate the change of switching transistor threshold voltage with input signal, therefore within the scope of whole working signal, conduction impedance is lower.Compared with single channel switch, there is input signal peak voltage ranges and equal supply voltage and the advantage such as conduction impedance is more stable in input reference signal.The switch cut-off when control end adds low level.During analog switch conducting, conducting resistance is tens ohm; During analog switch cut-off, present very high impedance, can open circuit be become.Analog switch can transmission of digital signals and analog signal, and the upper limiting frequency of the analog signal that can transmit is 40MHz.CD4066。
Analog switch is a kind of three-stable state circuit, and it according to the level of gating end, can determine the state of input end and output.When elected go side is in strobe state, the state of output depends on the state of input end; When elected go side is in cut-off state, then no matter input end's level how, output is all high-impedance state.Analog switch possess low in energy consumption, speed fast, mechanical contact, volume are little and the feature such as long service life.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, the reception of twice change code of " 0 " and " suspension " code that radiating portion sends is realized, good condition is created to the research of twice emitting, greatly improve the character of rudimentary coding integrated circuit, the decoding of present inventor is integrated must receive two subcategory numbers after just have output, thus there is the very high anti-ability of cracking, because rudimentary coding integrated circuit has cheap advantage, so its product has very strong competitiveness.
2, increased interlock function newly, made this reception define the function of quadruple constraint, substantially increase and crack difficulty, but but can reliably receive.
If 3 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.
4, the dicode receiving lines of this measure receives reliable.
Its reason is that the decoding integrated package 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 suspends, 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 suspend.Have followed the rule of this kind of encoding and decoding integrated package 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 " 0 ", just automatically becomes the code " suspension " needed for second time, twice receiving course is not disorderly, onside.
5, 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.
6, circuit is reliable, and one is that circuit is simplified, two be bilateral analog switch possess low in energy consumption, speed is fast, mechanical contact, volume are little and the feature such as long service life.
7, 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 transient state type biswitch formula receiving circuit.
In figure 1, radio frequency reception demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding integrated package; 3, the fixed code of decoding integrated package; 4, the variation code of decoding integrated package; 5, the 4th of integrated package of decoding exports; 6, the last output of decoding integrated package; 7, second of integrated package of decoding exports; 8, code control end is become; 9, interlocking unit; 010, performance element; 011, the automatic transcoding units of biswitch type.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 1, radio frequency reception demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding integrated package; 3, the fixed code of decoding integrated package; 4, the variation code of decoding integrated package; 5, the 4th of integrated package of decoding exports; 6, the last output of decoding integrated package; 7, second of integrated package of decoding exports; 8, code control end is become; 10, the current-limiting resistance of performance element; 11, executive circuit; 12, first or gate diode; 13, second or gate diode; 14, phase inverter; 15, the clamp diode of code control end clamper performance element is become; 16, performance element second clamp diode; 17, the first clamp diode; 18, base stage trigger resistance; 19, diode is controlled; 20, first analog switch; 22, the source resistance of second analog switch control end; 23, second analog switch.
Detailed description of the invention
Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.
One, element is selected: integrated package of wherein decoding selects 2272, and bilateral analog switch selects CD4066.
Two, weld: weld by Fig. 2.
Three, Detection and adjustment:
1, switch working state detects: with the change code control end of universal meter observing and controlling system decoding integrated package, and when decoding integrated package is not when receiving first signal, the change code control end of decoding integrated package should be low level.
2, to the Function detection of decoding integrated package automatic changing code end: when launching first time signal, decoding integrated package energy reliable reception: the change code control end that decoding integrated package surveyed by universal meter has high-order output.If now connect the integrated change code bit line of decoding with oscillographic hot junction, the signal of display screen can be become the phenomenon (representing that becoming code bit line is suspension) of flower screen from fair line.
3, the reception connecing twice signal is detected correct: decoding integrated package is after receiving the first signal, and secondary signal of fasting ejection very much, the last output of integrated package of at this moment decoding has high-order output.Have voltage to export when surveying this with universal meter, if when adopting oscillograph, display screen has high-order reaction.
4, detect Received signal strength whether sequential: universal meter or oscillograph are received decoding integrated finally go out end, if first launch secondary signal, now decode the last output of integrated package without high pressure, if there is high pressure, then illustrate that analog switch damages, also or the clamp diode weldering of the automatic transcoding units of biswitch type anti-.
5, whether reliably detect interlocking unit: the input of surveying executive circuit with universal meter, when multidigit output has output simultaneously, no-voltage is answered in the input of executive circuit, otherwise illustrates that phase inverter damages, or clamp diode is bad.
6, detect whether decoding integrated package is non-interlocking type: first output and second of universal meter or oscillograph being received decoding integrated package exports to be observed, and after receiving signal, signal can disappear within the time of short duration, otherwise the integrated model that should alternate coding.
Claims (3)
1. a transient state type biswitch formula receiving circuit, is characterized in that: be jointly made up of radio frequency reception demodulator circuit, decoding integrated package, interlocking unit, performance element, the automatic transcoding units of biswitch type:
Wherein: the automatic transcoding units of biswitch type is made up of integrated circuit bilateral analog switch: there are four independently analog switches integrated circuit bilateral analog switch inside, the negative pole of the control end connection control diode of first analog switch, control the change code control end connecing decoding integrated package after the positive pole of diode connects isolation resistance, the input end grounding line of first analog switch, the output of control termination first analog switch of second analog switch, control termination source resistance of second analog switch, the input termination power of second analog switch, the output of second analog switch becomes the output of the automatic transcoding units of biswitch type, connect the change code end of decoding integrated package,
Decoding integrated package has 8 bit code lines, four outputs, and wherein 7 bit codes in 8 bit lines connect for fixed code, and another bit code is connected with the output of the automatic transcoding units of biswitch type, becomes variation code, namely becomes code end;
Decoding integrated package has four outputs, and the output wherein connected with the automatic transcoding units of biswitch type is for become code control end, and the output connected with performance element is the last output of integrated package of decoding, and all the other two outputs connect with interlocking unit;
Performance element is made up of with executive circuit current-limiting resistance: one end of current-limiting resistance is connected the last output of decoding integrated package, and the other end of current-limiting resistance connects the input of executive circuit;
Interlocking unit by or gate diode, phase inverter, clamp diode form;
Decoding integrated package has four outputs, wherein the second output exports with the 4th the positive pole being connected or gate diode respectively, or the negative pole of gate diode is connected together and connects the input of phase inverter, the output of phase inverter connects the negative pole of two clamp diodes, and wherein first clamp diode connects with the base stage controlling triode in the automatic transcoding units of biswitch type; Second clamp diode connects with the input of executive circuit in performance element.
2. a kind of transient state type biswitch formula receiving circuit according to claim 1, is characterized in that: decoding integrated package is transient state type.
3. a kind of transient state type biswitch formula receiving circuit according to claim 1, is characterized in that: clamp diode with or gate diode be both face fit type diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526122.XU CN204304998U (en) | 2014-09-15 | 2014-09-15 | A kind of transient state type biswitch formula receiving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526122.XU CN204304998U (en) | 2014-09-15 | 2014-09-15 | A kind of transient state type biswitch formula receiving circuit |
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| Publication Number | Publication Date |
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| CN204304998U true CN204304998U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420526122.XU Expired - Fee Related CN204304998U (en) | 2014-09-15 | 2014-09-15 | A kind of transient state type biswitch formula receiving circuit |
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| Country | Link |
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| CN (1) | CN204304998U (en) |
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- 2014-09-15 CN CN201420526122.XU patent/CN204304998U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20160915 |