CN210609479U - Communication circuit and electronic equipment based on unicable technology - Google Patents
Communication circuit and electronic equipment based on unicable technology Download PDFInfo
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- CN210609479U CN210609479U CN201922485477.4U CN201922485477U CN210609479U CN 210609479 U CN210609479 U CN 210609479U CN 201922485477 U CN201922485477 U CN 201922485477U CN 210609479 U CN210609479 U CN 210609479U
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Abstract
The utility model discloses a communication circuit and electronic equipment based on unicable technique. The communication circuit comprises an LNB power supply circuit, a main chip, a tuning circuit, a demodulation circuit, a switching circuit and an isolation circuit; the input end of the switching circuit is connected with the main chip, the first output end of the switching circuit is respectively connected with the input end of the demodulation circuit, the output end of the isolation circuit and the tuning circuit, and the second output end of the switching circuit is connected with the controlled end of the isolation circuit; the input end of the isolation circuit is connected with the LNB power supply circuit. The switching circuit is disconnected according to the level signal sent by the main chip when receiving the diseqc input command, and the isolation circuit isolates the diseqc input command signal sent by the tuning circuit from the LNB power supply circuit, so that the diseqc input command signal is not influenced by the LNB power supply circuit, a special chip is not needed to identify the diseqc input command, and the communication cost is reduced.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a communication circuit and electronic equipment based on unicable technique.
Background
The unicable function is a satellite-based, one-wire technology, mainly applied to satellite television signal cable transmission, and originally originated in europe, and developed at first from the european famous satellite operator SES Astra corporation, which transmits and distributes satellite signals through one coaxial cable. The unified technology development has generated two generations of standards, wherein the standard of unified I (generation standard) is EN _50494, published in 2007, the standard of unified II (generation standard) is EN _50607, published in 2015, and the most important difference between unified II and unified I is the difference between command format and command function. The UnicableII has a one-way sending function, also has a two-way communication function, and simultaneously is added with commands with new functions, thereby realizing the two-way transmission of the commands.
Because the unicable II has a bidirectional communication function, a satellite signal, a digital satellite device Control (diseqc) output command of 13.5V/18.5V/22 KHz of Low Noise Block (LNB) power supply voltage, and a diseqc input command of 22KHz are superimposed in a satellite input signal line. When a diseqc input command is received, a 22KHz diseqc input command of 650mV needs to be superposed at the end of the LNB power supply voltage 13.5V/18.5V, but the LNB power supply voltage 13.5V/18.5V is provided by a DC-DC circuit, after a 650mV 22KHz waveform input by a peripheral is superposed, because the DC-DC circuit has a voltage negative feedback mechanism, the output voltage can be readjusted, the 650mV voltage of the diseqc input command can be compressed to 100mV, and the diseqc input command cannot be recognized. In the prior art, a unique II special chip is generally used for solving the problem, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a communication circuit and electronic equipment based on unicable technique aims at solving and need use special chip discernment diseqc input order to lead to the higher technical problem of cost when communicating based on unicable II technique among the prior art.
In order to achieve the above object, the present invention provides a communication circuit based on unicable technology, the circuit includes: the LNB power supply circuit, the main chip, the tuning circuit, the demodulation circuit, the switching circuit and the isolation circuit; wherein the content of the first and second substances,
the input end of the switching circuit is connected with the main chip, the first output end of the switching circuit is respectively connected with the input end of the demodulation circuit, the output end of the isolation circuit and the tuning circuit, the second output end of the switching circuit is connected with the controlled end of the isolation circuit, and the switching circuit is used for disconnecting the isolation circuit according to a level signal sent by the main chip when a diseqc input command state is received;
the input end of the isolation circuit is connected with the LNB power supply circuit, and the isolation circuit is used for isolating a diseqc input command signal input to the tuning circuit from the LNB power supply circuit when the switching circuit is disconnected.
Preferably, the switching circuit includes a first resistor, a second resistor, a first triode and an MOS transistor; wherein the content of the first and second substances,
the first end of the first resistor is connected with the main chip, and the second end of the first resistor is connected with the base electrode of the first triode;
a collector of the first triode is respectively connected with the first end of the second resistor and the grid of the MOS tube, and an emitter of the first triode is grounded;
the second end of the second resistor is respectively connected with the controlled end of the isolation circuit and the source electrode of the MOS tube;
and the drain electrode of the MOS tube is respectively connected with the output end of the isolation circuit, the input end of the demodulation circuit and the tuning circuit.
Preferably, the isolation circuit comprises a third resistor and an inductor; wherein the content of the first and second substances,
the third resistor is connected with the inductor in parallel, a first end of the third resistor is connected with the LNB power supply circuit and the source electrode of the MOS tube respectively, and a second end of the third resistor is connected with the drain electrode of the MOS tube, the input end of the demodulation circuit and the tuning circuit respectively.
Preferably, the inductance has a capacitance ranging from 50uH to 500 uH.
Preferably, the isolation circuit further comprises a fourth resistor; and a first end of the fourth resistor is respectively connected with the LNB power supply circuit and a first end of the third resistor, and a second end of the fourth resistor is grounded.
Preferably, the demodulation circuit includes a demodulation unit and an amplification unit; the amplifying unit comprises a capacitor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a second triode; wherein the content of the first and second substances,
the first end of the capacitor is connected with the second end of the third resistor, the drain electrode of the MOS tube and the tuning circuit respectively, and the second end of the capacitor is connected with the first end of the fifth resistor and the first end of the sixth resistor respectively;
the first end of the seventh resistor is respectively connected with the first end of the eighth resistor, the collector of the second triode and the demodulation unit;
a second end of the fifth resistor and a second end of the seventh resistor are both connected with a power supply;
the base electrode of the second triode is respectively connected with the second end of the sixth resistor and the second end of the eighth resistor, the collector electrode of the second triode is also connected with the demodulation unit, and the emitting electrode of the second triode is grounded.
Preferably, the tuning circuit is connected with the satellite antenna through an RF cable radio frequency line.
Preferably, the tuning circuit comprises a high frequency tuner.
Preferably, the LNB power supply circuit is a DC-DC circuit, and is configured to provide a direct current for a tuner of the satellite antenna and transmit a diseqc output command.
The utility model also provides an electronic equipment, electronic equipment includes as above communication circuit based on unicable technique.
The utility model discloses a set up LNB power supply circuit, main chip, tuning circuit, demodulation circuit, switching circuit and isolating circuit in the communication circuit based on unicable technique; the input end of the switching circuit is connected with the main chip, the first output end of the switching circuit is respectively connected with the input end of the demodulation circuit, the output end of the isolation circuit and the tuning circuit, the second output end of the switching circuit is connected with the controlled end of the isolation circuit, and the switching circuit is used for disconnecting the isolation circuit according to a level signal sent by the main chip when a diseqc input command state is received; the input end of the isolation circuit is connected with the LNB power supply circuit, and the isolation circuit is used for isolating a diseqc input command signal input to the tuning circuit from the LNB power supply circuit when the switching circuit is disconnected. The diseqc input command signal is isolated from the LNB power supply circuit through the switching circuit and the isolating circuit, so that the diseqc input command signal is not influenced by the LNB power supply circuit, a special chip is not needed to identify the diseqc input command, the communication cost is reduced, and the communication quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of a communication circuit based on unicable technology according to the present invention;
fig. 2 is an alternative structure diagram of the communication circuit based on the unicable technology in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 100 | LNB power supply circuit | R1～R8 | First to |
|
| 200 | Switching | L | Inductance | |
| 300 | Isolation circuit | 3.3 | Power supply | |
| 400 | Demodulation circuit | C | Capacitor with a |
|
| 500 | Tuning circuit | Q1 | A |
|
| 600 | Satellite antenna | | MOS tube | |
| 410 | Amplification unit | Q3 | |
|
| 420 | Demodulation unit | GND | Ground | |
| SOC | Main chip |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a communication circuit based on unicable technique.
Referring to fig. 1, in one embodiment, the circuits include an LNB power supply circuit 100, a main chip SOC, a switching circuit 200, an isolation circuit 300, a demodulation circuit 400, and a tuning circuit 500; wherein, the input end of the switching circuit 200 is connected to the main chip SOC, the first output end of the switching circuit 200 is respectively connected to the input end of the demodulation circuit 400, the output end of the isolation circuit 300 and the tuning circuit 500, the second output end of the switching circuit 200 is connected to the controlled end of the isolation circuit 300, and the switching circuit 200 is configured to disconnect the isolation circuit 300 according to a level signal sent by the main chip SOC when receiving a diseqc input command state; the input end of the isolation circuit 300 is connected to the LNB power supply circuit 100, and the isolation circuit 300 is configured to isolate the diseqc input command signal, which is input from the satellite antenna 600 to the tuning circuit 500, from the LNB power supply circuit 100 when the switching circuit 200 is disconnected.
It should be understood that a diseqc input command refers to a diseqc command transmitted from the satellite antenna 600 to an electronic device (e.g., a television) (not shown), a diseqc output command refers to a diseqc command output from the electronic device (e.g., a television) to the satellite antenna 600.
The LNB power supply circuit 100 is a DC-DC circuit for providing direct current to the LNB tuner of the satellite antenna 600, and includes a vertical polarization voltage of 13.5V and a horizontal polarization voltage of 18.5V; at the same time, diseqc output commands sent by an electronic device (e.g., a television) to the satellite antenna 600 are also modulated for output by the LNB power supply circuit 100.
The tuning circuit 500 is connected to the satellite antenna 600, and may be connected to the satellite antenna 600 through an RF cable, generally, to obtain the RF signal transmitted by the satellite antenna 600. The radio frequency signal includes a video signal, an audio signal, a diseqc input command signal, and the like. For one embodiment, the tuning circuit 500 may include a high frequency TUNER DVB-S2TUNER for down-converting video signals and audio signals. It has three main functions: 1. frequency selection (i.e., selecting a signal of a specified frequency); 2. amplifying a signal; 3. the selected frequency signal is converted to an IQ signal for use by subsequent demodulation circuit 400.
The demodulation circuit 400 includes an amplification unit 410 and a demodulation unit 420; the amplifying unit 410 is configured to amplify the received diseqc input command signal, and the demodulating unit 420 may include a demodulator DVB-S2DEMOD, and be configured to perform channel demodulation and channel decoding on the DVB-S2/S signal, and output a TS signal; and also decodes the received amplified diseqc input command signal.
The MCU is arranged in the main chip SOC, and the switch switching of the isolation circuit 300 is controlled through the GPIO port. As an embodiment, when an electronic device (such as a television) is in communication based on non-unified technology, the GPIO is set to high level, when the electronic device (such as a television) is in communication based on unified I, the GPIO is set to high level, and when the electronic device (such as a television) is in communication based on unified II, the GPIO is set to high level when software is initialized; a preset time (for example, 2ms) is set to be a high level before a diseqc output command is sent; a preset time (e.g., 2ms) before the diseqc output command is transmitted and a low level before the satellite antenna 600 returns data are received; the GPIO is set high a predetermined time (e.g., 2ms) after receiving data returned by the satellite antenna 600. That is, when the diseqc output command state is transmitted, the main chip SOC is set to a high level through the MCU control GPIO, and when the diseqc output command state is not transmitted, the main chip SOC is set to a low level through the MCU control GPIO. Wherein not sending a diseqc output command state includes receiving a diseqc input command state.
Compared with the prior art, the switching circuit 200 and the isolation circuit 300 are added in the embodiment, when a diseqc output command needs to be sent, the switching circuit 200 is turned on, the LNB power supply voltage 13.5V and the 18.5V, diseqc output command output by the LNB power supply circuit 100 can be transmitted to the satellite antenna 600 through the tuning circuit 500 through the turned-on switching circuit 200, and when the diseqc output command is not sent, the LNB power supply circuit 100 is isolated from a circuit loop of the diseqc input command through the isolation circuit 300, so that the LNB power supply circuit 100 does not affect the amplitude of the diseqc input command signal when the LNB power supply voltage is output.
The working principle of the embodiment is as follows: when an electronic device (such as a television) sends a diseqc output command to the satellite antenna 600, the main chip SOC outputs a high level, the switching circuit 200 is turned on, the dc voltage and the diseqc output command output by the LNB power supply circuit 100 are sent to the tuning circuit 500, and the tuning circuit 500 sends these signals to the satellite antenna 600.
After the diseqc output command is sent, the main chip SOC outputs a low level, the switching circuit 200 is turned off, and when the tuning circuit 500 receives the diseqc input command through the satellite antenna 600, the diseqc input command signal is sent to the amplifying unit 410.
In the embodiment, an LNB power supply circuit, a main chip, a tuning circuit, a demodulation circuit, a switching circuit and an isolation circuit are arranged in a communication circuit based on a unicable technology; the input end of the switching circuit is connected with the main chip, the first output end of the switching circuit is respectively connected with the input end of the demodulation circuit, the output end of the isolation circuit and the tuning circuit, the second output end of the switching circuit is connected with the controlled end of the isolation circuit, and the switching circuit is used for disconnecting the isolation circuit according to a level signal sent by the main chip when a diseqc input command state is received; the input end of the isolation circuit is connected with the LNB power supply circuit, and the isolation circuit is used for isolating a diseqc input command signal input to the tuning circuit from the LNB power supply circuit when the switching circuit is disconnected. The diseqc input command signal is isolated from the LNB power supply circuit through the switching circuit and the isolating circuit, so that the diseqc input command signal is not influenced by the LNB power supply circuit, a special chip is not needed to identify the diseqc input command, the communication cost is reduced, and the communication quality is improved.
Further, referring to fig. 2, fig. 2 is a schematic diagram of an optional structure of the communication circuit based on the unicable technology in fig. 1.
In this embodiment, the switching circuit 200 includes a first resistor R1, a second resistor R2, a first transistor Q1, and a MOS transistor Q2; a first end of the first resistor R1 is connected with the main chip SOC, and a second end of the first resistor R1 is connected with the base of the first triode Q1; the collector of the first triode Q1 is respectively connected with the first end of the second resistor R2 and the gate of the MOS transistor Q2, and the emitter of the first triode Q1 is grounded; a second end of the second resistor R2 is connected to the controlled end of the isolation circuit 300 and the source of the MOS transistor Q2, respectively; the drain of the MOS transistor Q2 is connected to the output terminal of the isolation circuit 300, the input terminal of the demodulation circuit 400, and the tuning circuit 500, respectively.
It should be understood that the values of the first resistor R1 and the second resistor R2 may be set between 1 kilo-ohm and 100 kilo-ohm, which is not limited in this embodiment.
It should be noted that, when the main chip SOC outputs a high level, the first transistor Q1 is turned on, the gate of the MOS transistor Q2 is at a low level, and the MOS transistor Q2 is turned on, and then the LNB power supply voltage 13.5V and the output command of 18.5V, diseqc output by the LNB power supply circuit 100 can be directly output to the tuning circuit 500 through the MOS transistor Q2.
When the main chip SOC outputs a low level, the first triode Q1 is conducted, the grid of the MOS tube Q2 is at a high level, the MOS tube Q2 is cut off, and the LNB power supply circuit 100 is isolated from a circuit loop of a diseqc input command through the isolation circuit 300.
Further, the isolation circuit 300 includes a third resistor R3 and an inductor L; the third resistor R3 is connected in parallel with the inductor L, a first end of the third resistor R3 is connected to the LNB power supply circuit 100 and the source of the MOS transistor Q2, and a second end of the third resistor R3 is connected to the drain of the MOS transistor Q2, the input of the demodulation circuit 400, and the tuning circuit 500.
It should be noted that the capacitance range of the inductor L may be set in a range from 50uH to 500uH, the impedance of the inductor L at a frequency of 22KHz reaches several tens of ohms, and at this time, the 650mV voltage of the diseqc input command does not affect the dc voltage output by the LNB power supply circuit 100, so that the LNB power supply circuit 100 does not affect the amplitude of the diseqc input command signal at 22KHz, but the inductor L may normally supply power to the tuner of the satellite antenna 600 by using the dc voltages 13.5V and 18.5V output by the LNB power supply circuit 100. Taking the value of the inductor L as 220uH as an example, the impedance of the inductor L at the frequency of 22KHz is Z2 pi fL 30.4 ohms, where f is the frequency and L is the inductor. When the value range of the third resistor R3 is more than 10 ohms, the resistance value of the inductor L after being connected in parallel with the third resistor R3 is about 10 ohms, and since the output impedance of the LNB power supply circuit 100 is low (only hundreds of ohms), the inductor L can be isolated from the influence of the LNB power supply circuit 100 on the diseqc input command signal when receiving the diseqc input command.
Further, the isolation circuit 300 further includes a fourth resistor R4; a first end of the fourth resistor R4 is connected to the LNB power supply circuit 100 and a first end of the third resistor R3, respectively, and a second end of the fourth resistor R4 is grounded.
It should be appreciated that for better isolation, a fourth resistor R4 may be added, wherein the resistance of the fourth resistor R4 may range from 10 kohms to 100 kohms.
Further, the amplifying unit 410 includes a capacitor C, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a second transistor Q3; a first end of the capacitor C is connected to the second end of the third resistor R3, the drain of the MOS transistor Q2, and the tuning circuit 500, and a second end of the capacitor C is connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6, respectively; a first end of the seventh resistor R7 is connected to a first end of the eighth resistor R8, a collector of the second transistor Q3, and the demodulation unit 420, respectively; a second end of the fifth resistor R5 and a second end of the seventh resistor R7 are both connected with a power supply of 3.3V; the base of the second transistor Q3 is connected to the second end of the sixth resistor R6 and the second end of the eighth resistor R8, respectively, the collector of the second transistor Q3 is further connected to the demodulation unit 420, and the emitter of the second transistor Q3 is grounded.
It should be understood that the values of the sixth resistor R6 and the seventh resistor R7 may be set to be between 100 ohms and 10 kohms, and the values of the fifth resistor R5 and the eighth resistor R8 may be set to be between 4.7 kohms and 300 kohms, which is not limited in this embodiment.
It should be understood that the amplification unit 410 may amplify the diseqc input command signal of 650mV to a signal of 3.3V, which is then input to the demodulation unit 420 for decoding and processing.
The embodiment solves the problem that a diseqc input command signal is easily attenuated by an LNB power supply circuit while realizing the bidirectional communication function of the unitary II through a simple circuit through the specific design of the switching circuit, the amplifying unit and the isolating circuit, has superior performance, and greatly saves the cost compared with a dedicated chip using the unitary II.
The utility model also provides an electronic device, the electronic device includes the communication circuit based on unicable technology as described above, the circuit structure of the communication circuit based on unicable technology of the electronic device can refer to the above-mentioned embodiment, and no longer repeated description is given here; it can be understood that, because the electronic device of this embodiment adopts the above-mentioned technical solution of the communication circuit based on the unicable technology, the electronic device has all the above-mentioned beneficial effects.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A communication circuit based on a unicable technology is characterized by comprising an LNB power supply circuit, a main chip, a tuning circuit, a demodulation circuit, a switching circuit and an isolation circuit; wherein the content of the first and second substances,
the input end of the switching circuit is connected with the main chip, the first output end of the switching circuit is respectively connected with the input end of the demodulation circuit, the output end of the isolation circuit and the tuning circuit, the second output end of the switching circuit is connected with the controlled end of the isolation circuit, and the switching circuit is used for disconnecting the isolation circuit according to a level signal sent by the main chip when a diseqc input command state is received;
the input end of the isolation circuit is connected with the LNB power supply circuit, and the isolation circuit is used for isolating a diseqc input command signal input to the tuning circuit from the LNB power supply circuit when the switching circuit is disconnected.
2. The unified technology based communication circuit according to claim 1, wherein the switching circuit comprises a first resistor, a second resistor, a first triode and a MOS transistor; wherein the content of the first and second substances,
the first end of the first resistor is connected with the main chip, and the second end of the first resistor is connected with the base electrode of the first triode;
a collector of the first triode is respectively connected with the first end of the second resistor and the grid of the MOS tube, and an emitter of the first triode is grounded;
the second end of the second resistor is respectively connected with the controlled end of the isolation circuit and the source electrode of the MOS tube;
and the drain electrode of the MOS tube is respectively connected with the output end of the isolation circuit, the input end of the demodulation circuit and the tuning circuit.
3. The unified technology based communication circuit according to claim 2, wherein the isolation circuit comprises a third resistor and an inductor; wherein the content of the first and second substances,
the third resistor is connected with the inductor in parallel, a first end of the third resistor is connected with the LNB power supply circuit and the source electrode of the MOS tube respectively, and a second end of the third resistor is connected with the drain electrode of the MOS tube, the input end of the demodulation circuit and the tuning circuit respectively.
4. The unicable technology-based communication circuit of claim 3, wherein the inductance has a capacitance ranging from 50uH to 500 uH.
5. The unified technology based communication circuit according to claim 4, wherein said isolation circuit further comprises a fourth resistor; and a first end of the fourth resistor is respectively connected with the LNB power supply circuit and a first end of the third resistor, and a second end of the fourth resistor is grounded.
6. The unified technology-based communication circuit according to claim 5, wherein the demodulation circuit comprises a demodulation unit and an amplification unit; the amplifying unit comprises a capacitor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a second triode; wherein the content of the first and second substances,
the first end of the capacitor is connected with the second end of the third resistor, the drain electrode of the MOS tube and the tuning circuit respectively, and the second end of the capacitor is connected with the first end of the fifth resistor and the first end of the sixth resistor respectively;
the first end of the seventh resistor is respectively connected with the first end of the eighth resistor, the collector of the second triode and the demodulation unit;
a second end of the fifth resistor and a second end of the seventh resistor are both connected with a power supply;
the base electrode of the second triode is respectively connected with the second end of the sixth resistor and the second end of the eighth resistor, the collector electrode of the second triode is also connected with the demodulation unit, and the emitting electrode of the second triode is grounded.
7. A unicable technology based communications circuit according to any of claims 1 to 6, wherein the tuning circuit is connected to the satellite antenna by an RF cable.
8. The unified technology based communication circuit according to claim 7, wherein said tuning circuit comprises a high frequency tuner.
9. The unicable technology-based communication circuit of claim 8, wherein the LNB power supply circuit is a DC-DC circuit for providing a DC power to a tuner of the satellite antenna and transmitting a diseqc output command.
10. An electronic device comprising a unicable technology based communication circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922485477.4U CN210609479U (en) | 2019-12-30 | 2019-12-30 | Communication circuit and electronic equipment based on unicable technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922485477.4U CN210609479U (en) | 2019-12-30 | 2019-12-30 | Communication circuit and electronic equipment based on unicable technology |
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| CN210609479U true CN210609479U (en) | 2020-05-22 |
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| CN201922485477.4U Active CN210609479U (en) | 2019-12-30 | 2019-12-30 | Communication circuit and electronic equipment based on unicable technology |
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