CN220041145U - Automobile simulation intelligent key card circuit - Google Patents
Automobile simulation intelligent key card circuit Download PDFInfo
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- CN220041145U CN220041145U CN202320838272.3U CN202320838272U CN220041145U CN 220041145 U CN220041145 U CN 220041145U CN 202320838272 U CN202320838272 U CN 202320838272U CN 220041145 U CN220041145 U CN 220041145U
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Abstract
The utility model discloses an automobile simulation intelligent key card circuit which comprises a controller, an ASK transmitting circuit and/or an FSK transmitting circuit and an LC oscillating circuit, wherein the signal input end of the ASK transmitting circuit is connected with the controller; the signal input end of the FSK transmitting circuit is connected with the controller; the LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor L1 and a first capacitor C11, one end of the first inductor L1 is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor L1 is connected with one end of the first capacitor C11, and the other end of the first capacitor C11 is connected with the reference ground through a second capacitor C12. Therefore, the remote control lock opening and closing process of different types of automobiles can be realized by simulating the existing automobile key, the automobile is controlled by remote control lock opening and closing, and the remote control key can be used as a standby remote control key.
Description
Technical Field
The utility model relates to the technical field of automobile electronics, in particular to an automobile simulation intelligent key card circuit.
Background
With the development of scientific technology, wireless transmission technology is mature, and by utilizing the technology, many control operations of people can be completed by remote control, and in the current automobile design, in order to facilitate the door opening and closing actions of users, automobile intelligent keys are arranged. The intelligent key is at least provided with two functions of unlocking and locking, and is used for sending corresponding unlocking and locking signals to the automobile so as to realize remote control door opening and closing and other actions. The automobile remote control key is arranged, so that manual operations such as key insertion are omitted, and great convenience is provided for users. However, the user may lose the original smart key of the automobile during the use process, so it is necessary to provide an automobile simulation smart key card circuit to simulate the working process of the original smart key of the automobile, and when the key of the user is lost, the application of the disassembly-free automobile can be realized.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present utility model is to propose an automotive analog smart key card circuit.
To achieve the above object, an embodiment of the present utility model provides an automobile simulation smart key card circuit, including:
a controller;
the signal input end of the ASK transmitting circuit is connected with the controller;
and/or an FSK transmitting circuit, wherein the signal input end of the FSK transmitting circuit is connected with the controller;
the LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor L1 and a first capacitor C11, one end of the first inductor L1 is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor L1 is connected with one end of the first capacitor C11, and the other end of the first capacitor C11 is connected with the reference ground through a second capacitor C12.
Further, according to one embodiment of the present utility model, the automobile analog smart key card circuit further includes a push-pull circuit, the push-pull circuit including:
the source electrode of the first MOS switch tube Q3 is connected with a power supply, the grid electrode of the first MOS switch tube Q3 is connected with a control end of the controller, and the drain electrode of the first MOS switch tube Q3 is connected with the other end of the first capacitor C11 through a first resistor R14;
the drain electrode of the second MOS switch tube Q5 is connected with the other end of the first capacitor C11, the source electrode of the second MOS switch tube Q5 is connected with the reference ground, and the grid electrode of the second MOS switch tube Q5 is connected with the control end of the controller;
the second MOS switch tube Q5 is an N-channel MOS tube, and the first MOS switch tube Q3 is a P-channel MOS tube.
Further, according to an embodiment of the present utility model, the FSK transmit circuit includes:
the base of the first triode Q4 is connected with a control end of the controller through a second resistor R15, the emitter of the first triode Q4 is connected with the reference ground, and the collector of the first triode Q4 is connected with one end of the first inductor L1 through a third capacitor C9.
Further, according to an embodiment of the present utility model, the ASK transmitting circuit includes:
the base electrode of the second triode Q6 is connected with a control end of the controller through a third resistor R23, and the emitter electrode of the second triode Q6 is connected with the reference ground through a fourth resistor R26;
the anode of the first diode D7 is connected with the reference ground, and the cathode of the first diode D7 is connected with the collector of the second triode Q6 through a fifth resistor R20;
and the cathodes of the second diodes U2-C2 are connected, and the anodes of the second diodes U2-C2 are connected with one end of the first inductor L1.
Further, according to one embodiment of the present utility model, the automobile analog smart key card circuit further comprises:
and the receiving circuit is respectively connected with the LC oscillating circuit and the controller to receive the radio frequency wireless signal, demodulate the radio frequency wireless signal and output the radio frequency wireless signal to the controller.
Further, according to an embodiment of the present utility model, the receiving circuit includes:
a third diode D6, an anode of the third diode D6 is connected to the other end of the first inductor L1;
a sixth resistor R21, one end of the sixth resistor R21 is connected to the cathode of the third diode D6, and the other end of the sixth resistor R21 is connected to the ground;
a fourth capacitor C14, wherein one end of the fourth capacitor C14 is connected to the cathode of the third diode D6, and the other end of the fourth capacitor C14 is connected to the ground;
a seventh resistor R19, wherein one end of the seventh resistor R19 is connected to the cathode of the third diode D6;
a fifth capacitor C15, wherein one end of the fifth capacitor C15 is connected to the other end of the seventh resistor R19, and the other end of the fifth capacitor C15 is connected to the reference ground;
the inverting input end of the comparator is connected with the common end of the seventh resistor R19 and the fifth capacitor C15, the non-inverting input end of the comparator is connected with the output end of the reference level, and the output end of the comparator is connected with the detection signal end of the controller.
Further, according to one embodiment of the present utility model, the automobile analog smart key card circuit further comprises:
and the wake-up circuit is respectively connected with the LC oscillating circuit and the controller, and is used for outputting a wake-up signal to the controller after receiving the wireless signal through the LC oscillating circuit so as to wake up the controller.
Further, according to an embodiment of the present utility model, the wake-up circuit comprises:
the base electrode of the third triode Q2 is connected with the other end of the first inductor L1 through an eighth resistor R13, the emitter electrode of the third triode Q2 is connected with the reference ground, and the collector electrode of the third triode Q2 is connected with a power supply through a ninth resistor R10;
the grid electrode of the third MOS tube Q1 is connected with the collector electrode of the third triode Q2 through a ninth resistor R12, the source electrode of the third MOS tube Q1 is connected with a power supply through a tenth resistor R11, and the drain electrode of the third MOS tube Q1 is connected with the wake-up end of the controller.
Further, according to one embodiment of the present utility model, the automobile analog smart key card circuit further comprises: and the battery power supply circuit is respectively connected with the power supply battery and the controller so as to control the output of the power supply battery and supply power for the controller.
Further, according to one embodiment of the present utility model, the automobile analog smart key card circuit further comprises: the LED indication circuit is connected with the controller to indicate the working state under the control of the controller.
The automobile simulation intelligent key card circuit provided by the embodiment of the utility model is connected with the controller through the signal input end of the ASK transmitting circuit; the signal input end of the FSK transmitting circuit is connected with the controller; the LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor L1 and a first capacitor C11, one end of the first inductor L1 is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor L1 is connected with one end of the first capacitor C11, and the other end of the first capacitor C11 is connected with the reference ground through a second capacitor C12. Therefore, the remote control lock opening and closing process of different types of automobiles can be realized by simulating the existing automobile key, the automobile is controlled by remote control lock opening and closing, and the remote control key can be used as a standby remote control key.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration of an automobile analog smart key card according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of structures of an FSK transmitting circuit, an ASK transmitting circuit, an LC oscillating circuit, a push-pull circuit, a receiving circuit and a wake-up circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a controller circuit according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a power supply circuit according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of an LED indicating circuit according to an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1 to 3, an automobile simulation smart key card circuit is characterized by comprising: controller, ASK transmitting circuit, and/or FSK transmitting circuit and LC oscillating circuit, the ASK
A signal input end of the (amplitude shift keying amplitude keying) transmitting circuit is connected with the controller; therefore, when the ASK modulation signal is required to be sent to be communicated with the automobile, the controller can control the ASK transmitting circuit to send the ASK modulation signal, and the controller can realize unlocking control of the automobile by carrying out wireless signal communication with the automobile wireless module so as to realize the function of generating the emergency analog key.
The signal input end of the FSK (Frequency Shift Keying frequency shift keying) transmitting circuit is connected with the controller; the communication modes of different automobile smart keys may be different. According to the embodiment, two modulation modes are designed for communication, any one of the two modulation modes can be selected for wireless communication with the automobile, and unlocking operation of the automobile is achieved. In this way, more vehicle models can be supported. For example, it is possible to support a Toyota 94/D4, 98, 39, 88/A8, A9 type of smart key full loss matching. When the FSK modulation signal is required to be sent to be communicated with the automobile, the controller can control the FSK transmitting circuit to send the FSK modulation signal, and the controller can realize unlocking control of the automobile by carrying out wireless signal communication with the automobile wireless module so as to realize the function of generating an emergency simulation key. Because the mode of realizing the total loss and disassembly-free of the key is realized, an original car key is needed, and the original car key is generated by reading and decrypting the original car anti-theft data and writing the data into the analog card.
The LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor L1 and a first capacitor C11, one end of the first inductor L1 is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor L1 is connected with one end of the first capacitor C11, and the other end of the first capacitor C11 is connected with the reference ground through a second capacitor C12. The LC oscillating circuit can output ASK modulation signals or FSK modulation signals generated by the ASK transmitting circuit and/or the FSK transmitting circuit and LC oscillating signals, and the ASK modulation signals or the FSK modulation signals are sent to the automobile, so that wireless signal unlocking of the automobile is realized.
Referring to fig. 2, the automobile analog smart key card circuit further includes a push-pull circuit, the push-pull circuit including: the first MOS switch tube Q3 and the second MOS switch tube Q5, the source electrode of the first MOS switch tube Q3 is connected with a power supply, the grid electrode of the first MOS switch tube Q3 is connected with a control end of the controller, and the drain electrode of the first MOS switch tube Q3 is connected with the other end of the first capacitor C11 through a first resistor R14; the drain electrode of the second MOS switch tube Q5 is connected with the other end of the first capacitor C11, the source electrode of the second MOS switch tube Q5 is connected with the reference ground, and the grid electrode of the second MOS switch tube Q5 is connected with the control end of the controller; the second MOS switch tube Q5 is an N-channel MOS tube, and the first MOS switch tube Q3 is a P-channel MOS tube. As shown in fig. 2, the gates of the first MOS switch tube Q3 and the second MOS switch tube Q5 are respectively connected with the control end of the controller, and the controller may perform on-off control on the first MOS switch tube Q3 and the second MOS switch tube Q5, so as to cooperate with the ASK transmitting circuit and/or the FSK transmitting circuit to generate the ASK modulation signal or the FSK modulation signal. Specifically, when an FSK modulation signal is required to be sent in an FSK manner, the controller sends a 125K/150K pulse signal through the PA3 signal end, and the pulse signal is filtered by an LC oscillating circuit formed by the first inductor L1 and the first capacitor C11, and then cooperates with the FSK transmitting circuit to generate the FSK modulation signal, and is transmitted to the outside in a wireless manner. When an ASK modulation signal is required to be sent in an ASK mode, the controller outputs a low-level signal through a PA3 signal end, and the low-level signal enables an LC vibration circuit formed by a first inductor L1 and a first capacitor C11 to be connected with a level vbat_3v, and generates the ASK modulation signal in cooperation with the ASK transmitting circuit and transmits the ASK modulation signal to the outside in a wireless mode.
Referring to fig. 2, the FSK transmit circuit includes: the base of the first triode Q4 is connected with a control end of the controller through a second resistor R15, the emitter of the first triode Q4 is connected with the reference ground, and the collector of the first triode Q4 is connected with one end of the first inductor L1 through a third capacitor C9. As shown in fig. 2, the first triode Q4 may be turned on or off under the action of the signal terminal PA2 by the controller, and cooperate with the LC oscillating circuit to generate an FSK modulation signal, and transmit the FSK modulation signal to the outside in a wireless manner.
Referring to fig. 2, the ASK transmitting circuit includes: the base electrode of the second triode Q6 is connected with a control end of the controller through a third resistor R23, and the emitter electrode of the second triode Q6 is connected with the reference ground through a fourth resistor R26; the anode of the first diode D7 is connected with the reference ground, and the cathode of the first diode D7 is connected with the collector of the second triode Q6 through a fifth resistor R20; the cathodes of the second diodes U2-C2 are connected, and the anodes of the second diodes U2-C2 are connected with one end of the first inductor L1. As shown in fig. 2, the second triode Q6 may be turned on or off under the action of the signal terminal PA4 by the controller, and the signal is turned on or off by the first diode D7 and the second diode U2-C2, so as to generate an ASK modulation signal in cooperation with the LC oscillating circuit, and transmit the ASK modulation signal to the outside in a wireless manner.
Specifically, as shown in fig. 2, the controller outputs a high level to the first transistor Q4 through the PA2 signal terminal, and outputs a low level to the second transistor Q6 through the PA4 signal terminal, so that the first transistor Q4 is turned on and the second transistor Q6 is turned off. When the controller outputs a low-level signal through the PA3 signal end, the low-level signal enables the MOS tube Q3 to be conducted, the MOS tube Q5 to be cut off, the power supply VBAT_3V charges the LC oscillating circuit through the first resistor R14, and the LC oscillating circuit and the first triode Q4 form a charging loop. When the controller outputs a high-level signal through the PA3 signal end, the high-level signal enables the MOS tube Q5 to be conducted, the MOS tube Q3 is cut off, the LC oscillating circuit discharges through the triode Q5 and the first triode Q4, an oscillating loop is formed, and the generation of an FSK modulation signal of the FSK transmitting circuit is realized through the frequency modulation effect of the third capacitor C9.
Similarly, when an ASK modulation signal is required to be sent in an ASK mode, the first triode Q4 is turned off, the second triode Q6 is turned on, when the controller outputs a low-level signal through the PA3 signal end, the low-level signal enables the MOS tube Q3 to be turned on, the MOS tube Q5 is turned off, the power supply vbat_3v charges the LC oscillating circuit through the first resistor R14, and the LC oscillating circuit, the second triode Q6 and the diode integrated circuit U2 form a charging loop. When the controller outputs a high-level signal through the PA3 signal end, the high-level signal enables the MOS tube Q5 to be conducted, the MOS tube Q3 is cut off, the LC oscillating circuit discharges through the second triode Q6, the diode integrated circuit U2 and the first triode Q4, so that an oscillating circuit is formed, and the ASK modulating signal of the ASK transmitting circuit is generated through the amplitude modulation effect of the diode integrated circuit U2. The ASK transmitting circuit generates ASK modulation signals and transmits the ASK modulation signals to the outside in a wireless mode.
The automobile simulation intelligent key card circuit provided by the embodiment of the utility model is connected with the controller through the signal input end of the ASK transmitting circuit; the signal input end of the FSK transmitting circuit is connected with the controller; the LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor L1 and a first capacitor C11, one end of the first inductor L1 is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor L1 is connected with one end of the first capacitor C11, and the other end of the first capacitor C11 is connected with the reference ground through a second capacitor C12. Therefore, the remote control lock opening and closing process of different types of automobiles can be realized by simulating the existing automobile key, the automobile is controlled by remote control lock opening and closing, and the remote control key can be used as a standby remote control key. The automobile simulation intelligent key card circuit is used for realizing the function of generating an emergency simulation key. The full loss and detachment-free can be realized by only one original car key, and the original car anti-theft data is read and decrypted, so that the original car key is generated after the data is written into the analog card, and the full loss matching of the intelligent keys of the Toyota 94/D4, 98, 39, 88/A8 and A9 types is supported.
Referring to fig. 1 and 2, the automobile analog smart key card circuit further includes: and the receiving circuit is respectively connected with the LC oscillating circuit and the controller to receive the radio frequency wireless signal, demodulate the radio frequency wireless signal and output the radio frequency wireless signal to the controller. The receiving circuit can receive a feedback signal output by the automobile communication module in a wireless mode so as to realize data exchange between the controller and the automobile communication module. As shown in fig. 2, the receiving circuit includes: a third diode D6, a sixth resistor R21, a fourth capacitor C14, a seventh resistor R19, a fifth capacitor C15, and a comparator, wherein an anode of the third diode D6 is connected with the other end of the first inductor L1; one end of the sixth resistor R21 is connected with the cathode of the third diode D6, and the other end of the sixth resistor R21 is connected with the reference ground; one end of the fourth capacitor C14 is connected to the cathode of the third diode D6, and the other end of the fourth capacitor C14 is connected to the ground; one end of the seventh resistor R19 is connected with the cathode of the third diode D6; one end of the fifth capacitor C15 is connected with the other end of the seventh resistor R19, and the other end of the fifth capacitor C15 is connected with the reference ground; the inverting input end of the comparator is connected with the common end of the seventh resistor R19 and the fifth capacitor C15, the non-inverting input end of the comparator is connected with the reference level output end, and the output end of the comparator is connected with the detection signal end of the controller.
Specifically, through the unidirectional conductivity of the third diode D6, the received signal of the LC oscillating circuit may be output in one direction to a filter circuit formed by the sixth resistor R21, the fourth capacitor C14, the seventh resistor R19, and the fifth capacitor C15, where the filter circuit may be a band-pass filter circuit, so as to filter an interference signal, output a valid signal to an inverted signal input end of the comparator U3, and the positive phase signal input end of the comparator U3 is connected to a reference level Vref, where the reference level may be obtained after the voltage division by a power supply level of the comparator U3. For example, after voltage division is performed through the resistor R18, the resistor R22 and the resistor R25, the voltage is output to the non-inverting input end of the comparator U3, after voltage comparison is performed through the comparator U3, the voltage is output to the PA6 signal end of the controller through the output end 1OUT, so that the controller can obtain the wireless signal sent by the automobile, and the wireless signal is received.
The car analog smart key card circuit described with reference to fig. 1 and 2 further includes: and the wake-up circuit is respectively connected with the LC oscillating circuit and the controller, and is used for outputting a wake-up signal to the controller after receiving the wireless signal through the LC oscillating circuit so as to wake up the controller. Since the car key is usually powered by a battery, in order to save the electric quantity of the battery, the circuit module can be set in a sleep state when not in use. When the circuit is needed to be used, the controller is awakened through the awakening circuit, so that the work control of each circuit module is realized.
As shown in fig. 2, the wake-up circuit comprises: the base electrode of the third triode Q2 is connected with the other end of the first inductor L1 through an eighth resistor R13, the emitter electrode of the third triode Q2 is connected with the reference ground, and the collector electrode of the third triode Q2 is connected with a power supply through a ninth resistor R10; the grid of the third MOS tube Q1 is connected with the collector of the third triode Q2 through a ninth resistor R12, the source of the third MOS tube Q1 is connected with a power supply through a tenth resistor R11, and the drain of the third MOS tube Q1 is connected with the wake-up end of the controller. Specifically, the third transistor Q2 may perform on or off control on the third MOS transistor Q1, so as to output a wake-up signal to the controller U1 through a PA5 signal, so as to perform wake-up control on the controller. More specifically, when the LC circuit receives a wireless signal, a high-level signal is output to the third triode Q2 through the LC1 signal end, so that the third triode Q2 is turned on, and the level of the gate of the third MOS transistor Q1 is pulled down, so that the third MOS transistor Q1 is also turned on, and the third MOS transistor Q1 outputs a high-level wake-up signal value through the PA5 signal end to the controller U1, so that the controller wakes up, and the controller performs a working state, and can perform wireless communication with an automobile by controlling the ASK transmitting circuit, and/or the FSK transmitting circuit and the LC oscillating circuit.
Referring to fig. 1 and 4, the automobile analog smart key card circuit further includes: and the battery power supply circuit is respectively connected with the power supply battery and the controller so as to control the output of the power supply battery and supply power for the controller. As shown in fig. 4, the battery power supply circuit includes a transient diode D8, a filter capacitor C16, a filter capacitor C1 and a MOS transistor Q7, where the transient diode D8 and the filter capacitor C16 are connected in parallel to the power supply output end of the power supply battery, so as to filter out high-frequency sharp signals, and the MOS transistor Q7 can prevent the battery from being reversely connected to the power supply output for reverse connection protection. The filter capacitor C1 is arranged at the output end of the MOS tube Q7, can filter high-frequency sharp signals and provides stable power supply for each circuit module.
Referring to fig. 1 and 5, the automobile analog smart key card circuit further includes: the LED indication circuit is connected with the controller to indicate the working state under the control of the controller. As shown in fig. 5, the LED indication circuit includes a light emitting diode D5, an anode of the light emitting diode D5 is connected to a power supply through a resistor R9, a cathode of the light emitting diode D5 is connected to a control end of the controller, the controller may output a control signal through a PA1 signal end, when the control signal is at a low level, the light emitting diode D5 may be turned on, and when the control signal is at a high level, the light emitting diode D5 is turned off, so as to indicate the working state.
Although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the present utility model may be modified or equivalents substituted for some of the features thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (10)
1. An automotive analog smart key card circuit, comprising:
a controller;
the signal input end of the ASK transmitting circuit is connected with the controller;
and/or an FSK transmitting circuit, wherein the signal input end of the FSK transmitting circuit is connected with the controller;
the LC oscillating circuit is connected with the ASK transmitting circuit and/or the FSK transmitting circuit; the LC oscillating circuit comprises a first inductor (L1) and a first capacitor (C11), one end of the first inductor (L1) is connected with the ASK transmitting circuit and/or the signal output end of the FSK transmitting circuit, the other end of the first inductor (L1) is connected with one end of the first capacitor (C11), and the other end of the first capacitor (C11) is connected with the reference ground through a second capacitor (C12).
2. The automobile simulated smart key card circuit of claim 1, further comprising a push-pull circuit, said push-pull circuit comprising:
the source electrode of the first MOS switch tube (Q3) is connected with a power supply, the grid electrode of the first MOS switch tube (Q3) is connected with one control end of the controller, and the drain electrode of the first MOS switch tube (Q3) is connected with the other end of the first capacitor (C11) through a first resistor (R14);
the drain electrode of the second MOS switch tube (Q5) is connected with the other end of the first capacitor (C11), the source electrode of the second MOS switch tube (Q5) is connected with the reference ground, and the grid electrode of the second MOS switch tube (Q5) is connected with the control end of the controller;
the second MOS switch tube (Q5) is an N-channel MOS tube, and the first MOS switch tube (Q3) is a P-channel MOS tube.
3. The automotive analog smart key card circuit of claim 1, wherein the FSK transmit circuit comprises:
the base of the first triode (Q4) is connected with a control end of the controller through a second resistor (R15), the emitter of the first triode (Q4) is connected with the reference ground, and the collector of the first triode (Q4) is connected with one end of the first inductor (L1) through a third capacitor (C9).
4. The automobile analog smart key card circuit of claim 1, wherein said ASK transmitting circuit comprises:
the base electrode of the second triode (Q6) is connected with a control end of the controller through a third resistor (R23), and the emitter electrode of the second triode (Q6) is connected with the reference ground through a fourth resistor (R26);
a first diode (D7), wherein the anode of the first diode (D7) is connected to the reference ground, and the cathode of the first diode (D7) is connected to the collector of the second triode (Q6) through a fifth resistor (R20);
-a second diode (U2-C2), the cathode of the second diode (U2-C2) being connected, the anode of the second diode (U2-C2) being connected to the one end of the first inductance (L1).
5. The automotive analog smart key card circuit of claim 1, further comprising:
and the receiving circuit is respectively connected with the LC oscillating circuit and the controller to receive the radio frequency wireless signal, demodulate the radio frequency wireless signal and output the radio frequency wireless signal to the controller.
6. The automobile simulated smart key card circuit of claim 5, wherein said receiving circuit comprises:
-a third diode (D6), the anode of said third diode (D6) being connected to said other end of said first inductance (L1);
a sixth resistor (R21), one end of the sixth resistor (R21) is connected to the cathode of the third diode (D6), and the other end of the sixth resistor (R21) is connected to the reference ground;
a fourth capacitor (C14), one end of the fourth capacitor (C14) is connected to the cathode of the third diode (D6), and the other end of the fourth capacitor (C14) is connected to the ground;
a seventh resistor (R19), one end of the seventh resistor (R19) being connected to the cathode of the third diode (D6);
a fifth capacitor (C15), one end of the fifth capacitor (C15) is connected to the other end of the seventh resistor (R19), and the other end of the fifth capacitor (C15) is connected to the reference ground;
the inverting input end of the comparator is connected with the common end of the seventh resistor (R19) and the fifth capacitor (C15), the non-inverting input end of the comparator is connected with the reference level output end, and the output end of the comparator is connected with the detection signal end of the controller.
7. The automotive analog smart key card circuit of claim 1, further comprising:
and the wake-up circuit is respectively connected with the LC oscillating circuit and the controller, and is used for outputting a wake-up signal to the controller after receiving the wireless signal through the LC oscillating circuit so as to wake up the controller.
8. The automobile simulated smart key card circuit of claim 7, wherein said wake-up circuit comprises:
a base electrode of the third triode (Q2) is connected with the other end of the first inductor (L1) through an eighth resistor (R13), an emitting electrode of the third triode (Q2) is connected with the reference ground, and a collecting electrode of the third triode (Q2) is connected with a power supply through a ninth resistor (R10);
the grid of the third MOS tube (Q1) is connected with the collector of the third triode (Q2) through a ninth resistor (R12), the source of the third MOS tube (Q1) is connected with a power supply through a tenth resistor (R11), and the drain of the third MOS tube (Q1) is connected with the wake-up end of the controller.
9. The automotive analog smart key card circuit of claim 1, further comprising: and the battery power supply circuit is respectively connected with the power supply battery and the controller so as to control the output of the power supply battery and supply power for the controller.
10. The automotive analog smart key card circuit of claim 1, further comprising: the LED indication circuit is connected with the controller to indicate the working state under the control of the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320838272.3U CN220041145U (en) | 2023-04-11 | 2023-04-11 | Automobile simulation intelligent key card circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320838272.3U CN220041145U (en) | 2023-04-11 | 2023-04-11 | Automobile simulation intelligent key card circuit |
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| CN220041145U true CN220041145U (en) | 2023-11-17 |
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| CN202320838272.3U Active CN220041145U (en) | 2023-04-11 | 2023-04-11 | Automobile simulation intelligent key card circuit |
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