CN204031140U - A kind of receiving circuit that can receive change code - Google Patents
A kind of receiving circuit that can receive change code Download PDFInfo
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- CN204031140U CN204031140U CN201420514595.8U CN201420514595U CN204031140U CN 204031140 U CN204031140 U CN 204031140U CN 201420514595 U CN201420514595 U CN 201420514595U CN 204031140 U CN204031140 U CN 204031140U
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Abstract
Can the receiving circuit becoming code be received, belong to telecontrol engineering field, jointly be made up of with " 0 " change-over circuit, performance element, decoding integrated package radio frequency reception demodulator circuit, reception external antenna, " suspension ".Be the circuit launched according to the change code applied for and propose to launch with single ripple dicode the one list ripple matched and become code receiving circuit, in an initial condition, first of decoding integrated package exports no-voltage, after reliable reception first time transmits, " suspension " and " 0 " change-over circuit start, carry out and become code, have received second time transmit after, performance element could be encouraged, achieve the reception of floated and " 0 " code twice change code that radiating portion sends, add reception external antenna, improve the sensitivity of reception, launch for research dicode and create better condition, the perfect performance of remote control product, make remote control product can obtain using more widely.
Description
Technical field
Belong to telecontrol engineering field.
Background technology
Control techniques, is a kind of application electronic technology very widely, appears at widely especially now among household electrical appliance, but household electrical appliances are not high to the requirement of telecontrol engineering, as long as general coding just can reach requirement, but to some particular/special requirements, telecontrol engineering still also exists certain problem.
As everyone knows, application remoting technology, first just must encode, and the major significance of its coding avoids being cracked by other people.So the quality of coding level of confidentiality, be directly connected to the quality of product quality.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, cracks 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 once have developed multiple transmitting Decision Making of Line Schemes that can become code, it can address these problems effectively, if but the receiver do not matched, all become empty talk, therefore, according to existing transmitting Decision Making of Line Schemes, the development of amount body can receive the receiving circuit becoming code, has become the necessary urgent problem solved at present, so, special research can launch with single ripple dicode the receiving circuit mated, and fit in it as a whole, the development for remote control product provides safer guarantee.
Summary of the invention
In order to improve remote control level of confidentiality degree, main purpose of the present utility model is the circuit launched according to the change code applied for, proposition can be launched with single ripple dicode the one list ripple matched and be become code receiving circuit, realize the reception of floated and " 0 " code twice change code that radiating portion sends, launch for research dicode and create better condition, its circuit is reliable, technology is simple, improve the anti-ability of cracking of tri-state coding adhesive integrated circuit energetically, improve the performance of remote control product, make remote control product can obtain using more widely.
The measure that this patent proposes is:
1, a kind of receiving circuit becoming code that can receive is made up of with " 0 " change-over circuit, performance element, decoding integrated package jointly radio frequency reception demodulator circuit, reception external antenna, " suspension ".
Wherein: receive the input that external antenna is connected to radio frequency reception demodulator circuit, the output of radio frequency reception demodulator circuit connects the input of decoding integrated package, first of decoding integrated package exports and connects " suspension " and " 0 " change-over circuit, second of decoding integrated package exports and connects performance element.
Wherein 7 connections of decoding integrated package 8 bit code position are fixed code, and another one becomes and becomes code end.
" suspension " and " 0 " change-over circuit are made up of inverter, PNP triode.
First of decoding integrated circuit exports the input connecting inverter, and the input of inverter connects a resistance to earth, and the output of inverter connects the base stage of PNP triode, and the emitter of PNP triode connects change code end, the grounded collector line of PNP triode.
2, decoding integrated package used is non-locking type.
3, the connected mode of the fixed code of decoding integrated package should be the same with the fixed code connected mode of integrated package of encoding in corresponding transmitting.
4, receiving external antenna is sucker antenna.
5, integrated package of decoding is consistent with the model weaving into integrated package, is PT type as weaved into integrated package, and decoding integrated package is also PT type.
This measure is explained as follows further:
1, sketch the cardinal principle of single ripple dicode transmitting that our unit for the previous period develops: in 8 bit codes of coding integrated package, wherein 7 is fixed code, wherein one is variation code, and radiating portion, when launching, launch two subcategory numbers.Wherein transmitter code is 7 fixed code wherein for the first time, and first subcategory number of " variation " code of one, and the code that second time is launched is 7 constant fixed code, and the coded signal after one " variation code " variation.And the first time coded signal of the receiving unit that the present invention the matches integrated middle variation that is received code is " suspension ", second time signal is the situation of " 0 ".And present receiving lines of the present invention, reliably will can receive the variation code sent for the first time is exactly " suspension ", and second time signal is the signal of the situation of " 0 ", but current scheme is different from the patent formula applied for last time.
2, in this measure 1, the line construction of the decode in two phases of generation: with 8 bit code lines in decoding integrated package and radiating portion integrated package of encoding corresponding.7 bit codes have wherein connected into fixed code (11 in Fig. 2).Last bit code becomes the change code end (10 in Fig. 2) of a kind of reception twice signal, and when initial condition, the code bit that in receiving unit, " displacement code " position presents all the time is the stationary state of " suspension ", and after receiving signal just produce decoding in change code become " 0 " state.Its decoding is integrated with two outputs, wherein first output (4 in Fig. 2), is also called to be " suspension " the change decoding circuit control end of change " 0 ", this end directly controls to become code.Another one is second output (6 in Fig. 2), and this output is connected with rear class, is directly to export decoded result at the corresponding levels.The structure of this circuit can realize receiving the requirement becoming code.In above-mentioned line construction, first of decoding integrated package exports the input connecting inverter, the input of inverter connects a resistance to earth, the output of inverter connects the base stage of PNP triode, the grounded collector line of PNP triode, the emitter of PNP triode connects change code end, namely changes code.
3, " suspend " realize with " 0 " change-over circuit the reason that " suspension " code becomes " 0 " code and be: when decode integrated first export no-output into zero time, the inverter output connected is for high-order, PNP triode base stage has voltage, its collector electrode no-output, the change code end connected both did not connect power supply and ground wire, was suspension.Otherwise export as time high when integrated first output of decoding has, there is bias current in the PNP triode base stage connected, emitter and collector electrode conducting, and the change code bit line earth connection connected is low level, so achieve the transformation that " suspension " becomes " 0 ".
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 Fig. 2, in an initial condition, namely, when first of integrated package of decoding exports Non voltage output, the control end of the analog switch connected is low level, and switch is off state, PNP triode base stage is without bias current, its collector electrode no-output, the change code end connected both did not connect power supply and ground wire, was " suspension " shape, be that suspended phase is corresponding with the first time signal sent, 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 the first output of integrated circuit of encoding has the high signal of 1 to input, the output of the inverter connected is low level, make in PNP triode conducting state, the change code terminate ground wire connected is low level, i.e. " 0 " state, identical with the variation code " 0 " launched, so can secondary coded signal be received.
(3), receive the sequential that has that twice change code must have successively to limit and principle: because the initial shape of decoding integrated package flexure curve in the present invention is suspension, so when only having radiating portion to send variation code for suspending, launching and receiving code could be corresponding, the output of coding integrated package first just has output, thus decoding integrated package is caused to become the new code that code just has " 0 ", and this new code could coincide with transmitting, thus integrated second output that makes to decode in the present invention has high-order output.Otherwise radiating portion is if first launching is secondary " 0 " signal, now because the change code bit line of coding integrated package of the present invention is that " suspension " shape and transmitter code do not meet under initial condition, do not have the output be connected with rear class.More than analyze, the present invention's decoding is integrated with output, after must first receiving primary correct signal, just may receive the correct signal that second time is launched.
(4), twice emitting signal has the strict demand receiving the time limit, (its benefit greatly can improve the ability of cracking) and principle: the transient state output type decoding integrated package that its decoding integrated package adopts in this measure, its benefit is, decoding integrated package is after receiving the signal sent for the first time, and the first output has high-order output, but is 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 important elements.Thus the level of confidentiality cracked is greatly increased.
5, radio frequency reception demodulator circuit has also connect reception external antenna, is sucker antenna, connects with shielding conductor, enhance receiving sensitivity to a great extent.
6, the inverter used in measure 1, for logical inversion, has good carrying load ability, when voltage is by high step-down, has cushioning effect, the PNP triode of rear class can not be damaged.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, the reception of floated and " 0 " code twice change code that radiating portion sends is realized, achieve the change code form of the coding integrated circuit of low price, be conducive to the lifting of the anti-ability of cracking of tri-state coding adhesive integrated circuit, just output is had after must receiving two subcategory numbers after the receiving circuit decoding of present inventor, thus there is the very high anti-ability of cracking, because rudimentary coding integrated package has cheap advantage, so its product has very strong competitiveness.
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 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 " suspension " for the first time, and the code of second time signal is " 0 ", 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 " 0 ".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 " suspension ", just automatically becomes the code " 0 " 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 meaning 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, this crack probability just may be lower.
5, circuit is reliable, and one is that circuit is simplified.Two is that inverter has good carrying load ability, when voltage is by high step-down, has cushioning effect, the PNP triode of rear class can not be damaged.
6, receive the utilization of external antenna, greatly enhance the sensitivity of reception.
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 schematic diagram that can receive the receiving circuit becoming code.
In figure: 01, receive external antenna; 1, radio frequency reception demodulator circuit (as superregenerative reception demodulator circuit, or beat reception demodulator circuit); 2, decoding integrated package; 3, performance element; 4, integrated package first of decoding exports; 5, " suspend " and " 0 " change-over circuit; 6, integrated package second of decoding exports.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 01, receive external antenna; 1, radio frequency reception demodulator circuit (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding integrated package; 3, performance element; 4, integrated package first of decoding exports; What integrated package of 6, decoding was connected with rear class second exports; 7, inverter input grounding resistance; 8, inverter; 9, PNP triode; 10, the fixed code of decoding integrated package; 12, the variation code of decoding integrated package.
Fig. 3 is the connection diagram receiving external antenna (sucker antenna) and radio frequency reception demodulator circuit.
In figure: 01, receive external antenna; 02, shielding conductor; 1, radio frequency reception demodulator circuit (as superregenerative reception demodulator circuit, or beat reception demodulator circuit); 2, decoding integrated package.
Embodiment
Fig. 1, Fig. 2, Fig. 3 describe the concrete execution mode implemented jointly.
1, element is selected: integrated package of wherein decoding selects 2272, and analog switch is CD4066, and triode is low power PNP triode, and resistance is the small-power resistance of 1/4 watt.
2, weld: by Fig. 3 connecting sucker antenna.Side circuit welds as shown in Figure 2.
3, adjustment and detection:
(1), can the Function detection of automatic changing code bit line: when launching first time signal, energy reliable reception of the present invention: the first output having universal instrument to survey decoding integrated package has high-order output.
(2) twice signal receiving function detect: after receiving the first signal, secondary signal of fasting ejection very much, and integrated package second of at this moment decoding exports high-order output.Have voltage to export when having universal instrument to survey this, if when adopting oscilloscope, display screen has high-order reaction.
(3) Received signal strength whether sequential, is detected: the second output universal instrument or oscilloscope being received decoding integrated package, if first launch secondary signal, integrated package second of now decoding exports without high pressure, if there is high pressure, illustrate that inverter input grounding resistance is excessive, or PNP triode is damaged.
(4), detect whether decoding integrated package is non-interlocking type: first output and second of universal instrument or oscilloscope being received decoding integrated package exports to be observed, and after receiving signal, signal can disappear within the time of short duration, otherwise should change the model of decoding integrated package.
Claims (5)
1. can receive the receiving circuit becoming code, it is characterized in that: jointly be made up of with " 0 " change-over circuit, performance element, decoding integrated package radio frequency reception demodulator circuit, reception external antenna, " suspension ";
Wherein: receive the input that external antenna is connected to radio frequency reception demodulator circuit, the output of radio frequency reception demodulator circuit connects the input of decoding integrated package, first of decoding integrated package exports and connects " suspension " and " 0 " change-over circuit, second of decoding integrated package exports and connects performance element;
Wherein 7 connections of decoding integrated package 8 bit code position are fixed code, and another one becomes and becomes code end;
" suspension " and " 0 " change-over circuit are made up of inverter, PNP triode;
First of decoding integrated circuit exports the input connecting inverter, and the input of inverter connects a resistance to earth, and the output of inverter connects the base stage of PNP triode, and the emitter of PNP triode connects change code end, the grounded collector line of PNP triode.
2. a kind of receiving circuit that can receive change code according to claim 1, is characterized in that: decoding integrated package used is non-locking type.
3. a kind of receiving circuit that can receive change code according to claim 1, is characterized in that: the connected mode of the fixed code of decoding integrated package should be the same with the fixed code connected mode of integrated package of encoding in corresponding transmitting.
4. a kind of receiving circuit that can receive change code according to claim 1, is characterized in that: receiving external antenna is sucker antenna.
5. a kind of receiving circuit that can receive change code according to claim 1, it is characterized in that: decoding integrated package is consistent with the model weaving into integrated package, is PT type as weaved into integrated package, decoding integrated package is also PT type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514595.8U CN204031140U (en) | 2014-09-09 | 2014-09-09 | A kind of receiving circuit that can receive change code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514595.8U CN204031140U (en) | 2014-09-09 | 2014-09-09 | A kind of receiving circuit that can receive change code |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204031140U true CN204031140U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420514595.8U Expired - Fee Related CN204031140U (en) | 2014-09-09 | 2014-09-09 | A kind of receiving circuit that can receive change code |
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| Country | Link |
|---|---|
| CN (1) | CN204031140U (en) |
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2014
- 2014-09-09 CN CN201420514595.8U patent/CN204031140U/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: 20150909 |
|
| EXPY | Termination of patent right or utility model |