Radio device based on A2B

Abstract

The utility model relates to the technical field of vehicle-mounted equipment, and particularly discloses an A2B-based radio device, which comprises a controller and a radio module, the controller is integrated with a processor chip and a first A2B module chip, and the radio module comprises a second A2B module chip, a radio chip and an antenna; the first A2B module chip is in communication connection with the second A2B module chip through an A2B wire harness, the second A2B module chip is in communication connection with the radio chip, the radio chip is in communication connection with the antenna, the processor chip is in communication connection with the first A2B module chip, and the processor chip is in communication connection with the second A2B module chip. According to the utility model, the problems of complex wiring harness deployment and serious interference of the vehicle-mounted radio are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted equipment, in particular to an A2B-based radio device. Background Art

[0002] As people's demand for car audio system experience increases, the audio systems installed in cars are becoming more and more professional, the number of connected audio peripherals is increasing, and the wiring is becoming more and more complicated. A large amount of wires not only increases the weight of the vehicle, but also affects the electromagnetic compatibility of the system. The existing car radio circuit module is composed of many analog signal lines, which are directly arranged and integrated on the controller motherboard with severe electromagnetic interference and high temperature. The antenna with a very long external wiring harness is easily interfered by other wiring harnesses in the car body, resulting in poor signal quality and heavy noise. Secondly, the circuit controller that does not require the radio module cannot be pluggable. Utility Model Content

[0003] In view of this, the utility model provides an A2B-based radio device to solve the problem of complex deployment and severe interference of vehicle-mounted radio wiring harnesses.

[0004] In the first aspect, the utility model provides an A2B-based radio device, including a controller and a radio module, the controller integrating a processor chip and a first A2B module chip, the radio module including a second A2B module chip, a radio chip and an antenna; the first A2B module chip and the second A2B module chip are communicatively connected via an A2B wiring harness, the second A2B module chip is communicatively connected to the radio chip, the radio chip is communicatively connected to the antenna, and the processor chip is communicatively connected to the first A2B module chip.

[0005] According to the above-mentioned technical means, an embodiment of the utility model proposes a radio device for A2B communication, which integrates an A2B module chip, a radio chip and an antenna into a circuit module. The controller circuit system provides power to the module through an A2B wiring harness and interacts with audio data and control commands through an A2B protocol, and realizes the pluggable function of the module and the main controller circuit system. Compared with traditional analog signal transmission, A2B communication has stronger anti-interference ability and can provide excellent audio quality. At the same time, it can also greatly save the weight and cost of car audio wiring harnesses, as well as electromagnetic interference and other problems.

[0006] In an optional implementation, the audio output pin of the radio chip is connected to the audio input pin of the second A2B module chip, the frame synchronization pin of the radio chip is connected to the first clock pin of the second A2B module chip, and the data bit synchronization pin of the radio chip is connected to the second clock pin of the second A2B module chip.

[0007] According to the above technical means, the radio chip and the second A2B module chip jointly constitute the same data interaction protocol through two clock and data pins, and at the same time realize the frame synchronization and data bit synchronization of the radio signal, further ensuring the accuracy of the radio signal.

[0008] In an optional embodiment, the external power supply is connected to the power pin of the radio chip through a preset resistor, the external power supply is connected to the ground through a preset resistor and a first preset capacitor, the ground pin of the radio chip is connected to the ground, and the bandgap reference source pin of the radio chip is connected to the ground through a second preset capacitor.

[0009] According to the above technical means, decoupling and high-frequency signal filtering are achieved when external power is provided to the radio chip, thereby reducing the voltage instability of the radio chip.

[0010] In an optional implementation, the digital core logic pin and the phase-locked loop pin in the second A2B module chip are both connected to the first power output pin, and the first power output pin is grounded through a third preset capacitor; the digital interface pin and the A2B interface pin in the second A2B module chip are both connected to the second power output pin, and the second power output pin is grounded through a fourth preset capacitor; the first power output pin and the second power output pin are respectively used to output different power supply voltages.

[0011] According to the above technical means, the second A2B module chip converts the external power supply into two different power outputs through two power output pins, and provides different power supply voltages for the digital core logic unit and communication interface inside the second A2B module chip, thereby realizing the flexible application of different functions of the two A2B module chips.

[0012] In an optional embodiment, the BP and BN pins of the second A2B module chip are connected to the CON-B two-wire connection port through an auxiliary circuit, the auxiliary circuit includes a digital power controller, a first filter capacitor and a resonant circuit, the two input ends of the digital power controller are respectively connected to the BP and BN pins, the first filter capacitor is connected between the two input ends of the digital power controller, and the two output ends of the digital power controller are connected to the resonant circuit.

[0013] According to the above technical means, an auxiliary circuit consisting of a digital power controller, a first filter capacitor and a resonant circuit is connected between the second A2B module chip and the CON-B two-wire connection port, so that it can be further used for absorbing high-order harmonics of the audio signal output by the second A2B module chip and eliminating self-oscillation.

[0014] In an optional implementation, the two output ends of the digital power controller are also connected to an impedance device, which includes a first impedance resistor, a second impedance resistor, a first impedance capacitor and a second impedance capacitor. The input ends of the first impedance resistor and the second impedance resistor are respectively connected to the two output ends of the digital power controller, the output ends of the first impedance resistor and the second impedance resistor are connected to each other, and the output end of the first impedance resistor is grounded through the first impedance capacitor, and the output end of the second impedance resistor is grounded through the second impedance capacitor.

[0015] According to the above technical means, the embodiment of the utility model is further provided with an impedance device at the two output ends of the digital power controller, so as to further absorb the high-order harmonics and eliminate the self-oscillation of the audio signal output by the second A2B module chip, thereby improving the signal accuracy.

[0016] In an optional implementation, a first anti-interference sub-circuit is further included, the first anti-interference sub-circuit includes a first sub-inductor, a second sub-inductor and a first sub-capacitor, the input ends of the first sub-inductor and the second sub-inductor are respectively connected to the BP and BN pins, and the output ends of the first sub-inductor and the second sub-inductor are both grounded through the first sub-capacitor.

[0017] In an optional implementation, a second anti-interference sub-circuit is further included, and the second anti-interference sub-circuit includes a third sub-inductor, a fourth sub-inductor, a second sub-capacitor and a third sub-capacitor. The first filter capacitor is connected to two input terminals of the digital power controller through the third sub-inductor and the fourth sub-inductor, respectively, and the output terminal of the third sub-inductor and the output terminal of the fourth sub-inductor are also grounded through the second sub-capacitor and the third sub-capacitor, respectively.

[0018] According to the above technical means, the embodiment of the utility model is also configured with a first anti-interference sub-circuit and a second anti-interference sub-circuit in the auxiliary circuit, so as to further absorb high-order harmonics and eliminate self-oscillation of the audio signal output by the second A2B module chip, thereby improving signal accuracy.

[0019] In an optional implementation, anti-electromagnetic resistors are respectively connected between the audio output pin of the radio chip and the audio input pin of the second A2B module chip, between the frame synchronization pin of the radio chip and the first clock pin of the second A2B module chip, and between the data bit synchronization pin of the radio chip and the second clock pin of the second A2B module chip.

[0020] According to the above technical means, a plurality of anti-electromagnetic resistors are connected between the communication lines of the radio chip and the second A2B module chip, which effectively solves the electromagnetic interference problem of the collected audio signal.

[0021] In an optional implementation, the first power output pin outputs 1.8V power, and the second power output pin outputs 3.3V power.

[0022] The technical solution provided by the utility model has the following advantages:

[0023] (1) According to the above technical means, the embodiment of the utility model proposes a radio device applied to A2B communication, which integrates an A2B module chip, a radio chip and an antenna into a circuit module. The controller circuit system provides power to the module through the A2B wiring harness and interacts with audio data and control commands through the A2B protocol, and realizes the pluggable function of the module and the main controller circuit system. Compared with traditional analog signal transmission, A2B communication has stronger anti-interference ability and can provide excellent audio quality. At the same time, it can also greatly save the weight and cost of the car audio wiring harness and electromagnetic interference.

[0024] (2) According to the above technical means, the radio chip and the second A2B module chip jointly constitute the same data interaction protocol through two clock and data pins, and simultaneously realize the frame synchronization and data bit synchronization of the radio signal, further ensuring the accuracy of the radio signal.

[0025] (3) According to the above technical means, decoupling and high-frequency signal filtering are achieved when the external power is provided to the radio chip, thereby reducing the voltage instability of the radio chip.

[0026] (4) According to the above technical means, the second A2B module chip converts the external power supply into two different power outputs through two power output pins, and provides different power supply voltages for the digital core logic unit and communication interface inside the second A2B module chip, thereby realizing flexible application of different functions of the second A2B module chip.

[0027] (5) According to the above technical means, an auxiliary circuit consisting of a digital power controller, a first filter capacitor and a resonant circuit is connected between the second A2B module chip and the CON-B two-wire connection port, so that it can be further used to absorb high-order harmonics of the audio signal output by the second A2B module chip and eliminate self-oscillation.

[0028] (6) According to the above technical means, the embodiment of the utility model is further configured with an impedance device at the two output ends of the digital power controller, so as to further absorb the high-order harmonics and eliminate self-oscillation of the audio signal output by the second A2B module chip, thereby improving the signal accuracy.

[0029] (7) According to the above technical means, the embodiment of the utility model is further configured with a first anti-interference sub-circuit and a second anti-interference sub-circuit in the auxiliary circuit, so as to further absorb high-order harmonics and eliminate self-oscillation of the audio signal output by the second A2B module chip, thereby improving signal accuracy.

[0030] (8) According to the above technical means, a plurality of anti-electromagnetic resistors are connected between the communication lines of the radio chip and the second A2B module chip, which effectively solves the electromagnetic interference problem of the collected audio signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 is a structural schematic diagram of an A2B-based radio device according to an embodiment of the utility model;

[0033] Figure 2 is a schematic diagram of a method for using an A2B-based radio device according to an embodiment of the utility model;

[0034] Figure 3 is a schematic diagram of another method of using the A2B-based radio device according to an embodiment of the utility model;

[0035] Figure 4 is another structural schematic diagram of an A2B-based radio device according to an embodiment of the utility model;

[0036] Figure 5 is another structural schematic diagram of an A2B-based radio device according to an embodiment of the utility model;

[0037] Figure 6 is another structural schematic diagram of an A2B-based radio device according to an embodiment of the utility model;

[0038] Figure 7 It is another structural schematic diagram of an A2B-based radio device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0039] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0041] The existing car radio circuit module is composed of many analog signal lines, which are directly arranged and integrated on the controller mainboard with severe electromagnetic interference and high temperature. The antenna with a very long external wire harness is easily interfered by other wire harnesses of the car body, resulting in poor signal quality and heavy noise. Secondly, the circuit controller that does not need the radio module cannot be pluggable. To solve the above problems, the embodiment of the utility model provides a radio device based on A2B.

[0042] According to an embodiment of the utility model, a radio device based on A2B is provided, such as Figure 1 As shown, the device includes a controller S1 and a radio module S2, the controller S1 integrates a processor chip S11 and a first A2B module chip S12, the radio module S2 includes a second A2B module chip S21, a radio chip S22 and an antenna S23; the first A2B module chip S12 and the second A2B module chip S21 are communicatively connected via an A2B wiring harness S3, the second A2B module chip S21 is communicatively connected to the radio chip S22, the radio chip S22 is communicatively connected to the antenna S23, and the processor chip S11 and the first A2B module chip S12 are communicatively connected.

[0043] Specifically, in recent years, a new automotive digital audio bus technology has been introduced that only requires one set of wires to achieve high-bandwidth bidirectional digital audio transmission, called the A2B bus. This bus uses ordinary wiring harnesses to achieve long-distance digital audio signal transmission. Compared with traditional analog signal transmission, A2B has stronger anti-interference ability and can provide excellent audio quality. At the same time, it can also greatly save the weight and cost of automotive audio wiring harnesses and electromagnetic interference.

[0044] The A2B-based radio device provided by the embodiment of the utility model specifically includes a controller S1 and a radio module S2, wherein the radio module S2 includes a radio chip S22, a peripheral circuit, a second A2B module chip S21, and a radio antenna S23 integrated on the same module. The second A2B module chip S21 is directly connected to the radio chip S22, the second A2B module chip S21 controls the radio chip S22 through an I2C interface, the second A2B module chip S21 receives audio data collected by the radio chip S22 through an I2S interface, and the second A2B module chip S21 receives control commands sent by the controller S1 through the first A2B module chip S12 and transmits and receives audio data.

[0045] The radio module S2 applied to A2B interacts with the controller S1 integrated with the first A2B module chip S12 for control data and audio data through the A2B wiring harness. The controller S1 can detect whether there is an external radio device connected through the A2B protocol, thereby choosing whether to perform software initialization configuration on the radio peripheral. During the power-on operation of the controller S1 integrated with A2B, real-time interactive control and audio data can be performed with the radio module S2 through the A2B wiring harness. The radio module S2 applied to A2B receives control data through the second A2B module chip S21, and sends it to the radio chip S22 through an interface directly connected to the radio chip S22. Similarly, the radio chip S22 sends audio data to the second A2B module chip S21 through an audio data interface directly connected to the second A2B module chip S21.

[0046] For example Figure 2 and Figure 3 As shown, it is a schematic diagram of the use method of the radio device based on A2B. When the device is powered on and initialized, the controller S1 integrated with the first A2B module chip S12 will detect whether the radio module S2 applied to A2B is connected through the A2B protocol. If it is determined that the radio module S2 is connected, the radio initial configuration instruction will be sent through the A2B bus. After the radio module S2 receives the initial configuration instruction through the A2B harness, the initial command is sent to the radio chip S22 through the second A2B module chip S21 to complete the initialization configuration. During the use of the radio function, the controller S1 will send control commands such as opening or searching channels to the radio module S2 through the A2B bus protocol. Specifically, the second A2B module chip S21 sends commands to the radio chip S22 through the I2C control interface. After the radio chip S22 completes the control commands such as opening or searching channels, the radio chip S22 will return the received radio audio data to the second A2B module chip S21 through the I2S interface, and the second A2B module chip S21 will then forward the audio data to the controller S1 through the A2B harness.

[0047] Through the solution provided by the embodiment of the utility model, the controller S1 circuit system provides power to the module through the A2B wiring harness and interacts with audio data and control commands through the A2B protocol, and realizes the pluggable function of the module and the main controller S1 circuit system. Compared with traditional analog signal transmission, A2B communication has stronger anti-interference ability and can provide excellent audio quality. At the same time, it can also greatly save the weight and cost of car audio wiring harnesses and electromagnetic interference and other problems.

[0048] In some optional embodiments, the audio output pin of the radio chip S22 is connected to the audio input pin of the second A2B module chip S21, the frame synchronization pin of the radio chip S22 is connected to the first clock pin of the second A2B module chip S21, and the data bit synchronization pin of the radio chip S22 is connected to the second clock pin of the second A2B module chip S21.

[0049] Specifically, Figure 4 As shown, the radio chip S22 takes TEF6686 as an example, and the second A2B module chip S21 takes AD2428 as an example, wherein the VSS pins of TEF6686 and AD2428 are both power supply ground lines, the ground line VSS of AD2428 is provided through the bus, the pin VDD in TEF6686 is the power supply high level, and the pin VIN of AD2428 is the power supply high level.

[0050] The frame synchronization pin WS in the radio chip S22 is connected to the first clock pin SYNC of the second A2B module chip S21, the data bit synchronization pin BCK in the radio chip S22 is connected to the second clock pin BCLK of the second A2B module chip S21, the SYNC clock and BCLK clock of the second A2B module chip S21 are provided by the controller S1 of the second A2B module chip S21 through the bus, the audio output pin I2S_SD in the radio chip S22 is a signal output in PCM format, and is connected to the audio input pin DRX signal input of the second A2B module chip S21, the DRX signal input of the second A2B module chip S21 supports PCM format, that is, the radio signal collected by the radio chip S22 is transmitted in PCM format through the I2S_SD pin and the DRX pin.

[0051] Through the configuration of this embodiment, the radio chip S22 and the second A2B module chip S21 together form the same data interaction protocol through two clock and data pins, and simultaneously realize the frame synchronization and data bit synchronization of the radio signal, further ensuring the accuracy of the radio signal.

[0052] In some optional implementations, a plurality of anti-electromagnetic resistors are respectively connected between the audio output pin of the radio chip S22 and the audio input pin of the second A2B module chip S21, between the frame synchronization pin of the radio chip S22 and the first clock pin of the second A2B module chip S21, and between the data bit synchronization pin of the radio chip S22 and the second clock pin of the second A2B module chip S21. For example, Figure 4 R3, R5 and R6 in the circuit effectively solve the electromagnetic interference problem of the collected audio signal.

[0053] In some optional embodiments, the external power supply VCC is connected to the power pin VDD of the radio chip S22 through a preset resistor R0, the external power supply VCC is connected to the ground through a preset resistor R0 and a first preset capacitor C0, the ground pin VSS of the radio chip S22 is connected to the ground, and the bandgap reference source pin VBGP of the radio chip S22 is connected to the ground through a second preset capacitor C3.

[0054] Specifically, the radio chip S22 takes TEF6686 as an example, for example Figure 5 As shown, the power supply pin VDD specifically includes three pins: VDDA_IFADC, VDDA_RF, and VDDD, wherein VDDA_IFADC is an IF analog power supply, VDDA_RF is an RF analog power supply, and VDDD is a digital power supply. The preset resistor R0 includes a first sub-resistor R1, a second sub-resistor R2, and a fourth sub-resistor R4. The external power supply VCC is connected to VDDA_IFADC, VDDA_RF, and VDDD in sequence through R1, R2, and R4, respectively. The first preset capacitor C0 includes a first sub-capacitor C1, a second sub-capacitor C5, and a third sub-capacitor C6, so that the external power supply VCC is connected to the ground through R1 and connected in series with C1, the external power supply VCC is connected to the ground through R2 and connected in series with C5, the external power supply VCC is connected to the ground through R4 and connected in series with C6, and the bandgap reference source pin VBGP is connected in series with the ground through C3. The circuit design here is used to decouple the power supply signal from the external power supply to the radio chip S22 and filter the high-frequency signal, thereby reducing the voltage instability of the radio chip S22 and improving the working reliability of the radio chip S22.

[0055] In some optional real-time modes, the digital core logic pin and the phase-locked loop pin in the second A2B module chip S21 are both connected to the first power output pin, and the first power output pin is grounded through a third preset capacitor; the digital interface pin and the A2B interface pin in the second A2B module chip S21 are both connected to the second power output pin, and the second power output pin is grounded through a fourth preset capacitor; the first power output pin and the second power output pin are respectively used to output different power supply voltages.

[0056] Specifically, for example Figure 6As shown, the second A2B module chip S21 takes AD2428 as an example, and the digital core logic pins of the second A2B module chip S21 include DVDD1 and DVDD2, both of which are connected to the first power output pin VOUT1 inside the second A2B module chip S21, and at the same time, the phase-locked loop pin PLLVDD is also connected to the first power output pin VOUT1. The digital interface pin IOVDD and the A2B interface pins (including ATRXVDD and BTRXVDD) in the second A2B module chip S21 are all connected to the second power output pin VOUT2. In a specific embodiment, the first power output pin VOUT1 provides a 1.8v power supply, and the second power output pin VOUT2 provides a 3.3v power supply.

[0057] According to the above technical means, the second A2B module chip S21 converts the external power supply into two different power outputs through two power output pins, and provides different power supply voltages for the digital core logic unit, phase-locked loop, digital interface and A2B interface inside the second A2B module chip S21, thereby realizing the flexible application of different functions of the second A2B module chip S21.

[0058] In some optional implementations, the two output power signals are filtered by capacitors C15-C17 and C25-C27 to stabilize the voltage.

[0059] In some optional embodiments, the BP and BN pins of the second A2B module chip S21 are connected to the CON-B two-wire connection port through an auxiliary circuit, the auxiliary circuit includes a digital power controller L6, a first filter capacitor C22 and a resonant circuit U1, the two input ends of the digital power controller L6 are respectively connected to the BP and BN pins, the first filter capacitor C22 is connected between the two input ends of the digital power controller L6, and the two output ends of the digital power controller L6 are connected to the resonant circuit U1.

[0060] Specifically, Figure 7 As shown, the BP and BN pins of the second A2B module chip S21 are connected to the CON-B two-wire connection port of the A2B module chip through the circuit shown in the figure, and connected to the downstream of the A2B module chip through CON-B. The block circuit includes a digital power controller L6, a first filter capacitor C22, and an output end connected to a resonant circuit U1 connected in series by inductors L2, L9, and capacitors C23, which is used for high-order harmonic absorption and elimination of self-excited oscillation, thereby improving the accuracy of the audio signal output by the second A2B module chip S21.

[0061] In some optional implementations, the A2B-based radio device provided by the embodiment of the utility model further includes a first anti-interference subcircuit U2 and a second anti-interference subcircuit U3. The first anti-interference subcircuit U2 includes a first sub-inductor L3, a second sub-inductor L8 and a first sub-capacitor C30, the input ends of the first sub-inductor L3 and the second sub-inductor L8 are respectively connected to the BP and BN pins, and the output ends of the first sub-inductor L3 and the second sub-inductor L8 are both grounded through the first sub-capacitor C30. The second anti-interference subcircuit U3 includes a third sub-inductor L4, a fourth sub-inductor L7, a second sub-capacitor C19 and a third sub-capacitor C29, the first filter capacitor C22 is respectively connected to the two input ends of the digital power controller L6 through the third sub-inductor L4 and the fourth sub-inductor L7, and the output end of the third sub-inductor L4 and the output end of the fourth sub-inductor L7 are also grounded through the second sub-capacitor C19 and the third sub-capacitor C29.

[0062] Specifically, through the first anti-interference sub-circuit U2 and the second anti-interference sub-circuit U3 configured in the auxiliary circuit according to the embodiment of the utility model, multiple inductors and a number of resistors and capacitors are used to further absorb high-order harmonics and eliminate self-oscillation of the audio signal output by the second A2B module chip S21, thereby improving signal accuracy.

[0063] In some optional embodiments, the two output ends of the digital power controller L6 are also connected to the impedance device U4, which includes a first impedance resistor R17, a second impedance resistor R18, a first impedance capacitor C18 and a second impedance capacitor C31. The input ends of the first impedance resistor R17 and the second impedance resistor R18 are respectively connected to the two output ends of the digital power controller L6, the output ends of the first impedance resistor R17 and the second impedance resistor R18 are connected to each other, and the output end of the first impedance resistor R17 is grounded through the first impedance capacitor C18, and the output end of the second impedance resistor R18 is grounded through the second impedance capacitor C31.

[0064] Specifically, Figure 7 As shown, the embodiment of the utility model is further provided with an impedance device U4 at the two output ends of the digital power controller L6, so as to further absorb the high-order harmonics and eliminate the self-oscillation of the audio signal output by the second A2B module chip S21, thereby improving the accuracy of the output audio signal.

[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A radio device based on A2B, characterized in that: It includes a controller and a radio module, the controller integrates a processor chip and a first A2B module chip, the radio module includes a second A2B module chip, a radio chip and an antenna; the first A2B module chip and the second A2B module chip are communicatively connected via an A2B wiring harness, the second A2B module chip is communicatively connected to the radio chip, the radio chip is communicatively connected to the antenna, and the processor chip is communicatively connected to the first A2B module chip.

2. The A2B-based radio device according to claim 1, characterized in that: The audio output pin of the radio chip is connected to the audio input pin of the second A2B module chip, the frame synchronization pin of the radio chip is connected to the first clock pin of the second A2B module chip, and the data bit synchronization pin of the radio chip is connected to the second clock pin of the second A2B module chip.

3. The A2B-based radio device according to claim 1, characterized in that: An external power supply is connected to a power pin of the radio chip via a preset resistor, the external power supply is connected to ground via the preset resistor and a first preset capacitor, a ground pin of the radio chip is connected to ground, and a bandgap reference source pin of the radio chip is connected to ground via a second preset capacitor.

4. The A2B-based radio device according to claim 1, characterized in that: The digital core logic pin and the phase-locked loop pin in the second A2B module chip are both connected to the first power output pin, and the first power output pin is grounded through a third preset capacitor; the digital interface pin and the A2B interface pin in the second A2B module chip are both connected to the second power output pin, and the second power output pin is grounded through a fourth preset capacitor; the first power output pin and the second power output pin are respectively used to output different power supply voltages.

5. The A2B-based radio device according to claim 1, characterized in that: The BP and BN pins of the second A2B module chip are connected to the CON-B two-wire connection port through an auxiliary circuit, wherein the auxiliary circuit includes a digital power controller, a first filter capacitor and a resonant circuit, wherein two input ends of the digital power controller are respectively connected to the BP and BN pins, the first filter capacitor is connected between the two input ends of the digital power controller, and two output ends of the digital power controller are connected to the resonant circuit.

6. The A2B-based radio device according to claim 5, characterized in that: The two output ends of the digital power controller are also connected to an impedance device, which includes a first impedance resistor, a second impedance resistor, a first impedance capacitor and a second impedance capacitor. The input ends of the first impedance resistor and the second impedance resistor are respectively connected to the two output ends of the digital power controller, the output ends of the first impedance resistor and the second impedance resistor are connected to each other, and the output end of the first impedance resistor is grounded through the first impedance capacitor, and the output end of the second impedance resistor is grounded through the second impedance capacitor.

7. The A2B-based radio device according to claim 6, characterized in that: It also includes a first anti-interference sub-circuit, which includes a first sub-inductor, a second sub-inductor and a first sub-capacitor, the input ends of the first sub-inductor and the second sub-inductor are respectively connected to the BP and BN pins, and the output ends of the first sub-inductor and the second sub-inductor are both grounded through the first sub-capacitor.

8. The A2B-based radio device according to claim 6, characterized in that: It also includes a second anti-interference sub-circuit, which includes a third sub-inductor, a fourth sub-inductor, a second sub-capacitor and a third sub-capacitor. The first filter capacitor is connected to two input terminals of the digital power controller through the third sub-inductor and the fourth sub-inductor respectively, and the output terminal of the third sub-inductor and the output terminal of the fourth sub-inductor are also grounded through the second sub-capacitor and the third sub-capacitor respectively.

9. The A2B-based radio device according to claim 2, characterized in that: Anti-electromagnetic resistors are also connected between the audio output pin of the radio chip and the audio input pin of the second A2B module chip, between the frame synchronization pin of the radio chip and the first clock pin of the second A2B module chip, and between the data bit synchronization pin of the radio chip and the second clock pin of the second A2B module chip.

10. The A2B-based radio device according to claim 4, characterized in that: The first power output pin outputs 1.8V power, and the second power output pin outputs 3.3V power.

Images