A signal transmission circuit, a receiving circuit, and a radar system

Abstract

Embodiments of the present application disclose a signal transmission circuit, a receiving circuit, and a radar system, which are used to improve the performance of the radar system. The signal transmission circuit includes: a first power supply circuit, a second power supply circuit, and a signal transmitter; the high potential end of the first power supply circuit is connected to the signal transmitter, and the first power supply circuit is used to provide a first voltage for the signal transmitter; the second power supply circuit is connected to the low potential end of the first power supply circuit, and the second power supply circuit is used to provide a second voltage for the first power supply circuit; the signal transmitter is used to transmit a signal at a first power according to the first voltage; wherein, the first voltage is determined according to the second voltage.

Description

Technical Field

[0001] This application relates to the field of electronic power technology, and particularly to a signal transmission circuit, a receiving circuit, and a radar system. Background Art

[0002] With the continuous evolution of automotive autonomous driving technology, the requirements for autonomous driving levels are constantly increasing. The autonomous driving system needs to effectively detect, identify, and classify various complex road conditions. As one of the most important sensors in the autonomous driving system, the lidar system is developing towards higher resolution (>100 lines), larger field of view (>120°), and longer detection distance (>200m).

[0003] A traditional radar system at least includes a radar transmitter, a radar receiver, and a processor. The radar transmitter is used to transmit radar signals and send the radar signals to obstacles in front of the radar system. The radar receiver is used to receive the reflected signals generated when the radar signals encounter obstacles. The processor is used to obtain detection information based on the power and time of the reflected signals received by the radar receiver.

[0004] Due to the differences in the distance of the objects detected by the radar signals, road conditions, and climate, the power of the radar signals that the radar transmitter needs to emit when detecting different objects is different. Therefore, a signal adjustment circuit needs to be set for the radar transmitter to adjust the power supply voltage of the radar transmitter, thereby adjusting the power of the radar signals. In the prior art, energy storage elements are mostly used to control the radar transmitter to adjust the radar signals, specifically by controlling the amount of electrical energy stored in the energy storage elements to adjust the power of the radar signals. If the required power of the radar signals is large, the energy storage elements need to store energy for a long time to meet the power requirements of the radar signals, which may cause a long interval between the emission times of two adjacent radar signals and a low repetition frequency of the radar transmitter. Therefore, the existing radar systems have the problem of low performance. Summary of the Invention

[0005] Embodiments of this application provide a signal transmission circuit, a receiving circuit, and a radar system to improve the performance of the radar system.

[0006] In a first aspect, embodiments of this application provide a signal transmission circuit, which includes: a first power supply circuit, a second power supply circuit, and a signal transmitter. Among them, the high potential end of the first power supply circuit is connected to the signal transmitter, and the second power supply circuit is connected to the low potential end of the first power supply circuit.

[0007] Among them, the first power supply circuit is used to provide a first voltage for the signal transmitter; the second power supply circuit is used to provide a second voltage for the first power supply circuit; the signal transmitter is used to emit signals at a first power according to the first voltage. Among them, the first voltage is determined according to the second voltage.

[0008] With the above circuit structure, the first power supply circuit and the second power supply circuit are superimposed to provide electrical energy for the signal transmitter. Among them, the second power supply circuit can provide a reference voltage for the first power supply circuit, thereby reducing the adjustment range of the output voltage of the first power supply circuit and reducing the voltage adjustment time of the first power supply circuit, thus solving the problem of long interval between the emission times of adjacent two radar signals caused by long energy storage time, improving the repetition frequency of the radar transmitter, and thus enhancing the performance of the radar system.

[0009] In a possible design, the positive pole of the second power supply circuit is connected to the low-potential end of the output terminal of the first power supply circuit, and the negative pole of the second power supply circuit is used to be connected to the signal transmitter.

[0010] With the above circuit structure, the first power supply circuit and the second power supply circuit are connected in series, so that the voltages output by the first power supply circuit and the second power supply circuit are superimposed to supply power to the signal transmitter, that is, the electrical energy received by the signal transmitter has two sources, namely the first power supply circuit and the second power supply circuit, thereby shortening the charge and discharge time of the energy storage element in the first power supply circuit, shortening the time interval between adjacent two signals, thus improving the repetition frequency of the radar transmitter, and thus enhancing the performance of the radar system.

[0011] In a possible design, the second power supply circuit includes: a first switch and a second switch.

[0012] Specifically, the first end of the first switch is connected to the low-potential end of the output terminal of the first power supply circuit, and the second end of the first switch is used to be connected to the first power supply; the first end of the second switch is connected to the first end of the first switch, and the second end of the second switch is used to be connected to the second power supply.

[0013] With the above circuit structure, by controlling the on and off of the first switch and the second switch, different voltage values are output to meet the power requirement of the signal emitted by the signal transmitter.

[0014] In a possible design, the second power supply circuit includes: a third switch, a fourth switch, a fifth switch and a sixth switch.

[0015] Specifically, the first end of the third switch is connected to the low-potential end of the output terminal of the first power supply circuit, and the second end of the third switch is used to be connected to the third power supply; the first end of the fourth switch is connected to the first end of the third switch, and the second end of the fourth switch is respectively connected to the first end of the fifth switch and the first end of the sixth switch; the second end of the fifth switch is used to be connected to the fourth power supply; the second end of the sixth switch is used to be connected to the fifth power supply.

[0016] With the above circuit structure, different voltage values are output by controlling the on / off states of multiple switches connected to different power supplies to meet the requirements of the signal power transmitted by the signal transmitter.

[0017] Based on the needs of circuit design, optionally, the second power supply circuit may include N switches, where N is an integer greater than 1.

[0018] In a possible design, the first power supply circuit includes: an inductor, a seventh switch, a diode, and a first capacitor.

[0019] Specifically, the first end of the inductor is used to connect to the sixth power supply, the second end of the inductor is respectively connected to the anode of the diode and the first end of the seventh switch; the cathode of the diode is connected to the first end of the first capacitor; the first end of the first capacitor is connected to the signal transmitter, the second end of the first capacitor is connected to the second end of the seventh switch; the second end of the seventh switch is connected to the second power supply circuit.

[0020] With the above circuit structure, by charging and discharging the first capacitor, the magnitude of the voltage provided for the signal transmitter is controlled to achieve the control of the magnitude of the signal power transmitted by the signal transmitter.

[0021] In a possible design, the first power supply circuit includes: a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, an eighth switch, a ninth switch, and a tenth switch.

[0022] Based on the needs of circuit design, optionally, the first power supply circuit may include multiple capacitors and multiple switches. The present application does not limit the specific number of capacitors and switches.

[0023] Specifically, the first end of the second capacitor is respectively connected to the seventh power supply and the first end of the eighth switch, the second end of the second capacitor is respectively connected to the first end of the third capacitor and the first end of the ninth switch; the second end of the third capacitor is respectively connected to the first end of the fourth capacitor and the first end of the tenth switch; the second ends of the ninth switch, the tenth switch, and the eleventh switch are all connected to the first end of the fifth capacitor; the second end of the fifth capacitor is respectively connected to the second end of the fourth capacitor and the second power supply circuit.

[0024] With the above circuit structure, by controlling the on / off states of the eighth switch, the ninth switch, and the tenth switch, the charging time and charging current of the fifth capacitor are controlled to control the magnitude of the first voltage.

[0025] In a possible design, the signal transmission circuit provided in the first aspect embodiment further includes: an eleventh switch;

[0026] The first end of the eleventh switch is connected to the signal transmitter, and the second end of the first switch is connected to the ground wire.

[0027] With the above circuit structure, when the signal transmitter needs to transmit a signal, the eleventh switch is controlled to close, and the signal transmitter forms a closed conduction path, and the signal transmitter is powered on to transmit the signal; when the signal transmitter does not need to transmit a signal, the eleventh switch is controlled to open, the branch where the signal transmitter is located is disconnected, and the signal transmitter loses power and stops transmitting the signal.

[0028] In a possible design, the signal sending circuit provided in the first aspect of the embodiments of the present application further includes: at least one controller, and the at least one controller includes a first controller and a second controller.

[0029] Specifically, the first controller is used to output a first control signal for the first power supply circuit; the second controller is used to output a second control signal for the second power supply circuit.

[0030] With the above circuit structure, by controlling the on / off of the switch in the first power supply circuit by the first controller, the output of the first voltage of the first power supply circuit is controlled, and by controlling the on / off of the switch in the second power supply circuit by the second controller, the output of the second voltage of the second power supply circuit is controlled.

[0031] In a second aspect, the embodiments of the present application provide a method for manufacturing a signal sending circuit, including: forming a first power supply circuit and a second power supply circuit on a substrate; connecting the high potential end of the first power supply circuit to the signal transmitter, and the first power supply circuit is used to provide a first voltage for the signal transmitter; connecting the second power supply circuit to the low potential end of the first power supply circuit, and the second power supply circuit is used to provide a second voltage for the first power supply circuit; the signal transmitter is used to transmit a signal at a first power according to the first voltage; wherein, the first voltage is determined according to the second voltage.

[0032] With the above method, a signal sending circuit can be formed on the substrate. There are two power supply circuits on the substrate for supplying power to the signal transmitter. The second power supply circuit can provide a reference voltage for the first power supply circuit, shortening the voltage adjustment range in the first power supply circuit, thereby solving the problem of low repetition frequency caused by too long energy storage time of the energy storage element due to the large adjustment range of the first power supply circuit, and improving the performance of the radar system.

[0033] In a third aspect, the embodiments of the present application provide a signal receiving circuit, and the signal receiving circuit includes: a first power supply circuit, a second power supply circuit, and a signal receiver. Wherein, the high potential end of the first power supply circuit is connected to the signal receiver, and the second power supply circuit is connected to the low potential end of the first power supply circuit.

[0034] Among them, the first power supply circuit is used to provide a first voltage for the signal receiver; the second power supply circuit is used to provide a second voltage for the first power supply circuit; the signal receiver is used to receive the reflected signal at a second power according to the first voltage, where the reflected signal is generated when the signal transmitted by the signal transmission circuit encounters a target. Among them, the first voltage is determined according to the second voltage.

[0035] With the above circuit structure, the first power supply circuit and the second power supply circuit are used in combination to provide electrical energy for the signal receiver. Among them, the second power supply circuit can provide a reference voltage for the first power supply circuit, thereby reducing the adjustment range of the output voltage of the first power supply circuit, reducing the voltage adjustment time of the first power supply circuit, increasing the repetition frequency of the radar transmitter, and thus improving the performance of the radar system.

[0036] In a fourth aspect, an embodiment of the present application provides a radar system, which includes at least one of the signal transmission circuit, the processing circuit, and the signal reception circuit provided in the first aspect and any possible design. Among them, the signal transmission circuit is connected to the signal reception circuit, and the signal reception circuit is connected to the processing circuit.

[0037] Among them, the signal transmission circuit is used to transmit a signal; the signal reception circuit is used to receive the reflected signal corresponding to the signal transmitted by the signal transmission circuit and convert the reflected signal into an electrical signal and output it to the processing circuit; the processing circuit is used to process the received electrical signal to obtain detection information.

[0038] The technical effects brought about by any possible design method in the fourth aspect can be referred to the technical effects brought about by the first aspect and / or different design methods in the first aspect, and will not be elaborated here.

[0039] In a fifth aspect, an embodiment of the present application provides a radar system, which includes at least one of the signal transmission circuit provided in the first aspect and any possible design, the signal reception circuit and the processing circuit provided in the third aspect and any possible design. Among them, the signal transmission circuit is connected to the signal reception circuit, and the signal reception circuit is connected to the processing circuit.

[0040] Among them, the signal transmission circuit is used to transmit a signal; the signal reception circuit is used to receive the reflected signal corresponding to the signal transmitted by the signal transmission circuit and convert the reflected signal into an electrical signal and output it to the processing circuit; the processing circuit is used to process the received electrical signal to obtain detection information.

[0041] The technical effects brought about by any possible design method in the fifth aspect can be referred to the technical effects brought about by the first aspect and / or different design methods in the first aspect, as well as the third aspect and / or different design methods in the third aspect, and will not be elaborated here.

[0042] In a sixth aspect, an embodiment of the present application provides a terminal, which may include the radar system provided in the fourth aspect and any possible design thereof, or the radar system provided in the fifth aspect and any possible design thereof.

[0043] Further, the terminal may be a drone, an unmanned transport vehicle, a robot, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 FIG. is a schematic structural diagram of an existing signal transmission circuit provided by an embodiment of the present application;

[0045] Figure 2 FIG. is a schematic structural diagram of the signal transmission circuit provided by an embodiment of the present application;

[0046] Figure 3 FIG. is a schematic structural diagram of a first power supply circuit provided by an embodiment of the present application Figure 1 ;

[0047] Figure 4 FIG. is a schematic structural diagram of a first power supply circuit provided by an embodiment of the present application Figure 2 ;

[0048] Figure 5 FIG. is a schematic structural diagram of a second power supply circuit provided by an embodiment of the present application Figure 1 ;

[0049] Figure 6 FIG. is a schematic structural diagram of a second power supply circuit provided by an embodiment of the present application Figure 2 ;

[0050] Figure 7 FIG. is a schematic flowchart of a manufacturing method of a signal transmission circuit provided by an embodiment of the present application;

[0051] Figure 8 FIG. is a schematic structural diagram of a signal reception circuit provided by an embodiment of the present application;

[0052] Figure 9 FIG. is a schematic structural diagram of a radar system provided by an embodiment of the present application Figure 1 ;

[0053] Figure 10 FIG. is a schematic structural diagram of a radar system provided by an embodiment of the present application Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The following will further describe in detail embodiments of the present application with reference to the drawings.

[0055] The signal transmission circuit and the signal reception circuit provided by the embodiments of the present application are part of a radar system. Among them, the signal transmission circuit is used to transmit a signal, which can be used to detect a target. The signal reception circuit is used to receive a reflected signal, which is generated when the transmitted signal emitted by the signal transmission circuit encounters a target.

[0056] The radar system provided by the embodiments of the present application can be applied to fields such as autonomous driving, robots, drones, connected vehicles, or security monitoring.

[0057] Taking the application scenario of autonomous driving as an example, the radar system can be set on a vehicle to detect the road conditions in front of the vehicle.

[0058] Currently, a possible structure of the signal transmission circuit can be as Figure 1 shown. Figure 1 The signal transmission circuit shown includes a first power supply circuit and a signal transmitter. Specifically, the first power supply circuit is connected to a power supply and the signal transmitter. The first power supply circuit is used to receive the electrical energy output by the power supply and adjust the output voltage value according to the control signal input by an externally connected controller to meet the working requirements of the signal transmitter.

[0059] Figure 1 Although the signal transmission circuit shown can be implemented to meet the requirements of the signal transmitter, in the first power supply circuit used to supply power to the signal transmitter, the charging and discharging of energy storage elements (such as capacitors) are mostly used to supply power to the signal transmitter. In some application scenarios, for example, when the distance between the signal transmitter and the target is far or the weather is bad, the energy storage element needs to store energy for a long time to meet the power requirement of the radar signal, and the time interval between this signal and the previous signal is relatively large, thus reducing the repetition frequency of the radar transmitter and reducing the performance of the radar system.

[0060] Therefore, there is a problem of low performance in the current radar system.

[0061] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0062] It should be noted that the multiple referred to in the present application means two or more.

[0063] The term "connection" involved in the present application describes the connection relationship between two objects and can represent two connection relationships. For example, when A and B are connected, it can mean: A is directly connected to B, and A is connected to B through C.

[0064] In addition, it should be understood that in the description of this application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and should not be construed as indicating or implying relative importance, nor as indicating or implying an order.

[0065] See Figure 2 , which is a schematic structural diagram of a signal transmission circuit provided by an embodiment of this application. The signal transmission circuit 200 includes: a first power supply circuit 201, a second power supply circuit 202, and a signal transmitter 203. Among them, the high potential end of the first power supply circuit 201 is connected to the signal transmitter 203, and the second power supply circuit 202 is connected to the low potential end of the first power supply circuit 201.

[0066] Among them, the first power supply circuit 201 is used to provide a first voltage for the signal transmitter 203; the second power supply circuit 202 is used to provide a second voltage for the first power supply circuit 201; the signal transmitter 203 is used to transmit a signal at a first power according to the first voltage; among them, the first voltage is determined according to the second voltage.

[0067] Furthermore, the positive and negative directions of the first voltage and the second voltage can be the same. The positive and negative directions of the first voltage and the second voltage being the same can specifically mean that if the first power supply circuit 201 and the second power supply circuit 202 are connected in series, the end of the first power supply circuit 201 that outputs a low level is connected to the end of the second power supply circuit 202 that outputs a high level.

[0068] It should be understood that since the first power supply circuit 201 and the second power supply circuit 202 are connected in series, a third voltage is output between the high potential end and the low potential end of the first power supply circuit 201, and the second power supply circuit 202 outputs the second voltage. The third voltage and the second voltage constitute the first voltage, that is, the first power supply circuit 201 and the second power supply circuit 202 are superimposed to supply power to the signal transmitter 203.

[0069] When the signal transmission circuit 200 transmits a signal, the second power supply circuit 202 outputs the second voltage, which is the reference voltage of the first power supply circuit 201. A third voltage is output between the high potential end and the low potential end of the first power supply circuit 201. The third voltage and the second voltage constitute the first voltage and are provided to the signal transmitter 203 to enable the signal transmitter 203 to transmit a signal. That is, the third voltage output between the high potential end and the low potential end of the first power supply circuit 201 is only a part of the power supplied to the signal transmitter 203, thereby shortening the magnitude of the third voltage output between the high potential end and the low potential end of the first power supply circuit 201, shortening the time required for the storage element in the first power supply circuit 201 to store the third voltage, shortening the time interval between adjacent two signals, and thus improving the repetition frequency of the radar transmitter and enhancing the performance of the radar system.

[0070] It should be understood that when the signal transmitter 203 does not need to transmit a signal, in order to avoid waste of energy, the signal transmission circuit 200 provided by the embodiments of the present application may further include an eleventh switch. The first end of the eleventh switch is connected to the signal transmitter 203, and the second end of the eleventh switch is connected to the ground wire.

[0071] Specifically, when the signal transmitter 203 does not need to transmit a signal, the eleventh switch can be disconnected, and the signal transmitter 203 loses power and stops transmitting the signal.

[0072] It should be understood that in order to avoid fluctuations in the output voltages of the first power supply circuit 201 and the second power supply circuit 202 caused by the power supply (when the input is a high voltage), the voltage input by the power supply can be first reduced to a fixed value and then gradually increased to the power supply voltages of the first power supply circuit 201 and the second power supply circuit 202 and then provided to the first power supply circuit 201 and the second power supply circuit 202.

[0073] Next, the specific structures of the first power supply circuit 201 and the second power supply circuit 202 in the signal transmission circuit 200 will be introduced.

[0074] Hereinafter, the first power supply circuit 201 provided by the embodiments of the present application will be explained and described.

[0075] I. The first power supply circuit 201

[0076] The high potential end of the first power supply circuit 201 is connected to the signal transmitter 203, and the low potential end of the first power supply circuit 201 is connected to the second power supply circuit 202.

[0077] Among them, the function of setting the first power supply circuit 201 is: to provide a first voltage for the signal transmitter 203.

[0078] The first power supply circuit 201 provided by the embodiments of the present application may be a control circuit, for example, it can be used to control the operation of the signal transmitter 203, or it can also be a circuit with a power supply function, for example, it can be used to supply power to the signal transmitter 203. Specifically, according to the devices that can implement the power supply function and the connection methods of the devices, it can be divided into 2 specific circuit structures. The structure of the first power supply circuit 201 provided by the present application will be described below in conjunction with embodiments, and specifically, it may include the following two solutions:

[0079] Solution 1. The first power supply circuit 201 may include: an inductor, a seventh switch, a diode, and a first capacitor.

[0080] Specifically, the first end of the inductor is used to connect to the sixth power supply, and the second end of the inductor is respectively connected to the anode of the diode and the first end of the seventh switch; the cathode of the diode is connected to the first end of the first capacitor; the first end of the first capacitor is connected to the signal transmitter, and the second end of the first capacitor is connected to the second end of the seventh switch; the second end of the seventh switch is connected to the second power supply circuit 202.

[0081] Among them, the function of setting the inductor is: storing the electric energy output by the sixth power supply connected to the first power supply circuit 201, and after the energy storage is completed, superimposing the electric energy output by the sixth power supply and the electric energy stored in the inductor and then outputting it to the first capacitor; the function of setting the first capacitor is: storing the electric energy output by the sixth power supply and the energy output by the inductor, and when the voltage rises to the third voltage (the voltage output between the high potential end and the low potential end of the first power supply circuit 201), outputting the stored voltage to provide it to the signal transmitter 203.

[0082] For the convenience of understanding, a specific example of the first power supply circuit 201 provided by Solution 1 is given below.

[0083] See Figure 3 This is a schematic structural diagram of a first power supply circuit 201 provided by Solution 1 of the present application. In Figure 3 the shown circuit, it includes an inductor L, a switch Q7, a diode D, and a first capacitor C1. Among them, A is used as the input end of the first power supply circuit 201 to connect to the sixth power supply, B is used as the high potential end of the output end of the first power supply circuit 201 to connect to the signal transmitter 203, and C is used as the low potential end of the output end of the first power supply circuit 201 to connect to the second power supply circuit 202.

[0084] Figure 3 The connection relationship of each device in the shown first power supply circuit 201 can be: the second end of L is respectively connected to the first end of Q7 and the first end of D, the second end of D is connected to the first end of C1, and the second end of Q7 is respectively connected to the second end of C1 and the second power supply circuit 202.

[0085] By Figure 3 the shown first power supply circuit 201 to provide the first voltage for the signal transmitter 203, A is used as the single-phase input end, B is used as the output end, and the energy is transmitted from left to right.

[0086] Specifically, at the starting moment, Q7 is closed, and the capacitor C1 and D are short-circuited by the conduction path formed by L and Q7. At this time, the electric energy output by the sixth power supply is directly stored on L. When Q7 is disconnected, L stops storing energy, and the electric energy stored on L and the voltage output by the sixth power supply are superimposed to charge C1. After C1 is fully charged, the third voltage is output across C1. At this time, the second power supply circuit 202 outputs the second voltage. At this time, the voltage output by B is the sum of the third voltage output across C1 and the second voltage output by the second power supply circuit 202, that is, the first voltage. When the signal transmitter 203 needs to transmit a signal to detect a target at this time, if the target is at a relatively long distance, the value of the first voltage can be changed by changing the third voltage output across C1 to meet the working requirements of the signal transmitter 203. At this time, the voltage values output by the high-potential end and the low-potential end of the output terminal of the first power supply circuit 201 are reduced from the original first voltage to the third voltage, reducing the energy storage time and discharge time of C1 and L, so that the voltage that meets the working requirements of the signal transmitter 203 can be output quickly, increasing the repetition frequency of the radar transmitter, and thus improving the performance of the radar system.

[0087] By adopting the above first power supply circuit 201, the charging time and discharge time of the inductor and the first capacitor can be controlled by controlling the conduction and disconnection of the seventh switch to change the value of the third voltage.

[0088] Solution 2: The first power supply circuit 201 may include a fifth capacitor, at least one voltage-dividing capacitor or a plurality of voltage-dividing capacitors, and at least one switch. Among them, the fifth capacitor can be used to store the electric energy provided for the signal transmitter 203. At least one or a plurality of voltage-dividing capacitors are connected in series and then connected to the power supply and a switch respectively. The amount of electric energy stored on the fifth capacitor can be controlled by controlling the working state of the switch.

[0089] In an example, the circuit may include: a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, an eighth switch, a ninth switch, and a tenth switch. Among them, the second capacitor, the third capacitor, and the fourth capacitor are voltage-dividing capacitors.

[0090] Specifically, the first end of the second capacitor is respectively connected to the seventh power supply and the first end of the eighth switch, and the second end of the second capacitor is respectively connected to the first end of the third capacitor and the first end of the ninth switch; the second end of the third capacitor is respectively connected to the first end of the fourth capacitor and the first end of the tenth switch; the second ends of the ninth switch, the tenth switch, and the eleventh switch are all connected to the first end of the fifth capacitor; the second end of the fifth capacitor is respectively connected to the second end of the fourth capacitor and the second power supply circuit 202. Among them, the sixth power supply and the seventh power supply may be the same power supply (i.e., the total power supply for the signal transmission circuit).

[0091] Among them, the functions of setting the second capacitor, the third capacitor, and the fourth capacitor are: to output different voltage values; the functions of setting the eighth switch, the ninth switch, and the tenth switch are: to respectively control the connections with the second capacitor, the third capacitor, and the fourth capacitor to provide different charging voltages for C5; the function of setting the fifth capacitor is: to store the received electric energy, and when the stored voltage rises to the third voltage (the voltage output between the high potential end and the low potential end of the first power supply circuit 201), the stored voltage is output and provided to the signal transmitter 203. Among them, both the seventh power supply and the sixth power supply can be the total power supply for the signal transmission circuit 200.

[0092] For the convenience of understanding, the following gives a specific example of the first power supply circuit 201 provided by Solution 2.

[0093] See Figure 4 which is a schematic structural diagram of a first power supply circuit 201 provided by Solution 2 of the present application. In Figure 4 the shown circuit, it includes capacitors C2 - C5 and switches Q8 - Q10. Among them, A is connected to the seventh power supply as the input end of the first power supply circuit 201, B is connected to the signal transmitter 203 as the high potential end of the output end of the first power supply circuit 201, and C is connected to the second power supply circuit 202 as the low potential end of the output end of the first power supply circuit 201.

[0094] Through Figure 4 when the first power supply circuit 201 shown realizes providing the first voltage for the signal transmitter 203, A is used as the single - phase input end, B is used as the output end, and the energy is transmitted from left to right.

[0095] Specifically, according to the capacitance values of C2 - C4, different voltage values are respectively output at the first ends of each capacitor. According to the fact that only one of Q8 - Q10 is conducting at the same moment, when the switch is conducting, the capacitor connected to the conducting switch outputs the supply voltage to charge C5. After C5 is charged, the third voltage is output across C5. At this time, the second power supply circuit 202 outputs the second voltage. At this time, the voltage output at B is the sum of the third voltage output across C1 and the second voltage output by the second power supply circuit 202, that is, the first voltage. At this time, when the signal transmitter 203 needs to detect a target, if the distance from the target is far, the value of the first voltage can be changed by changing the third voltage output across C1 to meet the working requirements of the signal transmitter 203. At this time, the voltage values output at the high potential end and the low potential end of the output end of the first power supply circuit 201 are reduced from the original first voltage to the third voltage, reducing the energy storage time and discharge time of C5, so that the voltage that meets the working requirements of the signal transmitter 203 can be output quickly, increasing the repetition frequency of the radar transmitter, and thus improving the performance of the radar system.

[0096] By adopting the above-mentioned first power supply circuit 201, the charging voltage of the fifth capacitor can be controlled by controlling the conduction and disconnection of the eighth switch, the ninth switch, and the tenth switch, so as to control the charging time and discharging time of the fifth capacitor, and change the value of the third voltage.

[0097] Of course, the above introduction to the structure of the first power supply circuit 201 is only an example. In actual applications, the first power supply circuit 201 can also adopt other structures (for example, the first power supply circuit 201 can adopt a structure of five capacitors and four switches to supply power to the signal transmitter 203), which will not be introduced in detail here in this application.

[0098] It should be understood that since the voltage adjustment range of the first power supply circuit 201 is reduced, the number of voltage-dividing capacitors in the first power supply circuit 201 provided by the second solution can be adaptively reduced, thereby reducing the operating cost of the first power supply circuit 201.

[0099] Next, the second power supply circuit 202 provided by the embodiments of this application will be explained.

[0100] II. The second power supply circuit 202

[0101] The positive electrode of the second power supply circuit 202 is connected to the low-potential end of the output terminal of the first power supply circuit 201, and the negative electrode of the second power supply circuit 202 is used to be connected to the signal transmitter 203. Among them, the second power supply circuit 202 is connected to the signal transmitter 203 through the ground wire.

[0102] Among them, the function of setting the second power supply circuit 202 is: to provide a second voltage for the first power supply circuit 201.

[0103] The second power supply circuit 202 provided by the embodiments of this application can be a control circuit. For example, it can be used to control the operation of the signal transmitter 203 and the magnitude of the first voltage output by the first control circuit 201, or it can also be a circuit with a power supply function. For example, it can be used to supply power to the signal transmitter 203 and the first power supply circuit 201.

[0104] Specifically, according to the devices that can achieve the above functions and the connection methods of the devices, it can be divided into 3 specific circuit structures. Next, the structure of the second power supply circuit 202 provided by this application will be described in conjunction with the embodiments, which can specifically include the following three methods:

[0105] Method 1. The second power supply circuit 202 can include: a first switch, a second switch, a first power supply, and a second power supply.

[0106] Specifically, the first end of the first switch is connected to the low-potential end of the output terminal of the first power supply circuit, and the second end of the first switch is used to be connected to the first power supply; the first end of the second switch is connected to the first end of the first switch, and the second end of the second switch is used to be connected to the second power supply.

[0107] Wherein, the functions of setting the first switch and the second switch are: by controlling the conduction or disconnection of the first switch and the second switch, the magnitude of the second voltage value is controlled, and the second voltage and the voltage output between the high-potential end and the low-potential end of the first power supply circuit 201 are superimposed to supply power to the signal transmitter 203.

[0108] It should be understood that in order to reduce the volume and cost of the second power supply circuit 202, the second power supply circuit 202 provided by the first embodiment of the present application may only include the first switch and the second switch, and the first power supply and the second power supply may adopt an external power supply connected to the second power supply circuit 202.

[0109] For the convenience of understanding, a specific example of the second power supply circuit 202 provided by the first embodiment is given below.

[0110] See Figure 5 FIG. is a schematic structural diagram of a second power supply circuit 202 provided by the first embodiment of the present application. In Figure 5 the shown circuit, it includes Q1 and Q2. Wherein, D is used as the input terminal of the second power supply circuit 202 and is connected to the first power supply, and C is used as the output terminal of the second power supply circuit 202 and is connected to the first power supply circuit 201.

[0111] Through Figure 5 when the second power supply circuit 202 shown realizes providing the second voltage for the first power supply circuit 201, D is used as the single-phase input terminal, C is used as the output terminal, and the energy is transmitted from left to right.

[0112] Specifically, when Q1 is conducting and Q2 is non-conducting, the second voltage output by the second power supply circuit 202 is equal to the voltage output by V1 + V2; when Q1 is non-conducting and Q2 is conducting, the second voltage output by the second power supply circuit 202 is equal to the voltage output by V2.

[0113] Specifically, when the first voltage is the sum of the second voltage output by the second power supply circuit 202 and the third voltage output between the high-potential end and the low-potential end of the first power supply circuit 201, and the first voltage is provided to supply power to the signal transmitter 203 to transmit a signal, when the signal transmitted by the signal transmitter 203 is used to detect a target at a relatively long distance, the value of the second voltage can be appropriately increased to reduce the voltage adjustment range of the first power supply circuit 201, thereby increasing the repetition frequency of the radar transmitter and improving the performance of the radar system. Wherein, the power supplies V1 and V2 can both be the sixth power supply or the seventh power supply.

[0114] By adopting the above-mentioned second power supply circuit 202, the magnitude of the second voltage can be controlled by controlling the conduction and disconnection of the first switch and the second switch.

[0115] Method 2: The second power supply circuit 202 may include: a third switch, a fourth switch, a fifth switch, a sixth switch, a third power supply, a fourth power supply, and a fifth power supply.

[0116] Specifically, the first end of the third switch is connected to the low-potential end of the output end of the first power supply circuit, and the second end of the third switch is used to be connected to the third power supply; the first end of the fourth switch is connected to the first end of the third switch, and the second end of the fourth switch is respectively connected to the first ends of the fifth switch and the sixth switch; the second end of the fifth switch is used to be connected to the fourth power supply; the second end of the sixth switch is used to be connected to the fifth power supply. Among them, the first power supply, the second power supply, the third power supply, the fourth power supply, and the fifth power supply may all be the sixth power supply or the seventh power supply.

[0117] It should be understood that in order to reduce the cost and volume of the second power supply circuit 202, the second power supply circuit provided by the second method of the present application may only include the third switch, the fourth switch, the fifth switch, and the sixth switch, and the third power supply, the fourth power supply, and the fifth power supply may adopt an external power supply connected to the second power supply circuit 202.

[0118] For the convenience of understanding, a specific example of the second power supply circuit 202 provided by the second method is given below.

[0119] See Figure 6 is a schematic structural diagram of a second power supply circuit 202 provided by the second method of the present application. In Figure 6 the shown circuit, Q3 - Q6 are included. Among them, D is used as the input end of the second power supply circuit 202 and is connected to the first power supply, and C is used as the output end of the second power supply circuit 202 and is connected to the first power supply circuit 201.

[0120] When Figure 6 the second power supply circuit 202 shown is used to provide the second voltage for the first power supply circuit 201, D is used as the single-phase input end, C is used as the output end, and the energy is transmitted from left to right.

[0121] Specifically, the magnitude of the second voltage is controlled by controlling the conduction or disconnection of Q3 - Q6, and the second voltage and the voltage output between the high-potential end and the low-potential end of the first power supply circuit 201 are superimposed to supply power to the signal transmitter 203.

[0122] Specifically, the first voltage is the sum of the second voltage output by the second power supply circuit 202 and the third voltage output between the high potential terminal and the low potential terminal of the first power supply circuit 201. When the first voltage is provided to supply power to the signal transmitter 203 to transmit a signal, when the signal transmitted by the signal transmitter 203 is used to detect a target at a relatively long distance, the value of the second voltage can be appropriately increased to increase the repetition frequency of the radar transmitter and improve the performance of the radar system.

[0123] By adopting the above-mentioned second power supply circuit 202, the magnitude of the second voltage can be controlled by controlling the conduction and disconnection of the third switch, the fourth switch, the fifth switch, and the sixth switch.

[0124] Mode 3: The second power supply circuit 202 can be a power supply circuit for outputting the second voltage.

[0125] Specifically, the second power supply circuit may include: an eighth power supply.

[0126] Among them, the positive pole of the eighth power supply is the positive pole of the second power supply circuit 202, and the negative pole of the sixth power supply is connected to the negative pole of the second power supply circuit 202. Among them, the sixth power supply outputs the second voltage.

[0127] In a possible implementation manner, the second power supply circuit 202 is provided with two card slots, which are respectively used to connect to the positive pole and the negative pole of the ninth power supply. When realizing providing the second voltage for the first power supply circuit 201, the volume of the signal sending circuit 200 is reduced. Among them, the ninth power supply is an external power supply connected to the second power supply circuit 202.

[0128] In another possible implementation manner, the second power supply circuit 202 is connected to the sixth power supply or the seventh power supply, and while realizing providing the second voltage for the first power supply circuit 201, the volume of the signal sending circuit 200 is reduced.

[0129] It should be understood that the signal sending circuit 200 provided in the embodiments of the present application further includes: at least one controller, and the at least one controller includes a first controller and a second controller; the first controller is used to output a first control signal for the first power supply circuit 201; the second controller is used to output a second control signal for the second power supply circuit 202.

[0130] Specifically, if the switch in the first power supply circuit 201 is a metal oxide semiconductor (MOS) transistor, the first controller can be connected to the gate of the MOS transistor, and the first power supply circuit 201 outputs a first voltage by controlling the on / off of the MOS transistor; if the switch in each circuit of the first power supply circuit 201 is a bipolar junction transistor (BJT), the first controller can be connected to the base of the BJT, and the first power supply circuit 201 outputs a first voltage by controlling the on / off of the BJT.

[0131] Specifically, if the switch in the second power supply circuit 202 is a MOS transistor, the second controller can be connected to the gate of the MOS transistor, and the second power supply circuit 202 outputs a second voltage by controlling the on / off of the MOS transistor; if the switch in each circuit of the second power supply circuit 202 is a BJT, the second controller can be connected to the base of the BJT, and the second power supply circuit 202 outputs a second voltage by controlling the on / off of the BJT.

[0132] In specific implementation, the first controller and the second controller can be any one of a micro controller unit (MCU), a central processing unit (CPU), and a digital signal processor (DSP). Of course, the specific form of the controller is not limited to the above examples.

[0133] Based on the same inventive concept, an embodiment of the present application further provides a manufacturing method of a signal sending circuit. The manufacturing method of the signal sending circuit provided by the embodiment of the present application can be as Figure 7 shown. The manufacturing method of the signal sending circuit provided by the embodiment of the present application mainly includes the following steps:

[0134] S701: Form a first power supply circuit and a second power supply circuit on a substrate.

[0135] The first power supply circuit here can be the first power supply circuit provided in the first solution or the second solution of the above embodiment. The second power supply circuit can be any one of the second power supply circuits provided in the first mode, the second mode, and the third mode of the above embodiment.

[0136] It should be noted that the implementation manners not described in detail in the manufacturing method of the signal sending circuit can be referred to the relevant descriptions in the signal sending circuit 200 shown in Figure 2 - 6 and will not be elaborated here.

[0137] S702: Connect the high-potential terminal of the first power supply circuit to the signal transmitter. The first power supply circuit is used to provide a first voltage for the signal transmitter.

[0138] The connection method can be that the high-potential terminal of the first power supply circuit is directly connected to the signal transmitter, or the high-potential terminal of the first power supply circuit is connected to the signal transmitter through other settings.

[0139] S703: Connect the second power supply circuit to the low-potential terminal of the first power supply circuit. The second power supply circuit is used to provide a second voltage for the first power supply circuit.

[0140] Among them, the existing signal transmitter uses the first voltage output by the first power supply circuit provided with an energy storage element to supply power to the signal transmitter. When the signal transmitter is used for obstacles at a relatively long distance, the power of the signal emitted by the signal transmitter needs to be relatively large to meet the detection requirements. Then, the time for the energy storage element to store this part of electrical energy is relatively long, reducing the working efficiency of the radar system.

[0141] For the circuit manufactured by using the manufacturing method of the signal sending circuit provided in this application, the first power supply circuit and the second power supply circuit are connected in series. The third voltage output between the two endpoints of the output terminal of the first power supply circuit and the second voltage output by the second power supply circuit are superimposed to form the first voltage. That is, the third voltage output by the first power supply circuit is a part of the electrical energy for supplying power to the signal transmitter, thereby shortening the energy storage time of the energy storage element in the first power supply circuit, thereby increasing the repetition frequency of the radar transmitter and improving the performance of the radar system.

[0142] S704: The signal transmitter is used to emit a signal at a first power according to the first voltage. The first voltage is determined according to the second voltage.

[0143] Based on the same inventive concept, an embodiment of this application also provides a signal receiving circuit.

[0144] See Figure 8 , which is a schematic structural diagram of a signal receiving circuit provided by an embodiment of this application. Among them, the signal receiving circuit 800 includes a first power supply circuit 801, a second power supply circuit 802, and a signal receiver 803.

[0145] Among them, the high-potential terminal of the first power supply circuit 801 is connected to the signal receiver 803, and the second power supply circuit 802 is connected to the low-potential terminal of the first power supply circuit 801.

[0146] Among them, the first power supply circuit 801 can be used to provide a first voltage for the signal receiver; the second power supply circuit 802 can be used to provide a second voltage for the first power supply circuit 801; the signal receiver 803 can be used to receive the reflected signal at a second power according to the first voltage. Among them, the reflected signal is generated when the signal transmitted by the signal transmission circuit encounters the target.

[0147] Further, the positive and negative directions of the first voltage and the second voltage can be the same. The positive and negative directions of the first voltage and the second voltage being the same can specifically mean that if the first power supply circuit 801 and the second power supply circuit 802 are connected in series, the end of the first power supply circuit 801 that outputs a low level is connected to the end of the second power supply circuit 802 that outputs a high level.

[0148] It should be understood that since the first power supply circuit 801 and the second power supply circuit 802 are connected in series, a third voltage is output between the high potential end and the low potential of the first power supply circuit 801, and the second power supply circuit 802 outputs the second voltage. The third voltage and the second voltage constitute the first voltage, that is, the first power supply circuit 801 and the second power supply circuit 802 are superimposed to supply power to the signal receiver 803.

[0149] When the signal receiving circuit 800 receives the reflected signal, the second power supply circuit 802 outputs the second voltage, which is the reference voltage of the first voltage. A third voltage is output between the high potential end and the low potential end of the first power supply circuit 801. The third voltage and the second voltage constitute the first voltage and are provided to the signal receiver 803 so that the signal receiver 803 can receive the reflected signal. That is, the third voltage output between the high potential end and the low potential end of the first power supply circuit 801 only provides a part of the electrical energy for the signal receiver 803, thereby shortening the magnitude of the third voltage output between the high potential end and the low potential end of the first power supply circuit 801, shortening the time required for the storage element in the first power supply circuit 801 to store the third voltage, shortening the time interval between adjacent two signals, and thus increasing the repetition frequency of the radar transmitter and improving the performance of the radar system.

[0150] It can be understood that the circuit structure design of the first power supply circuit 801 and the second power supply circuit 802 in the above signal receiving circuit 800 can refer to Figures 3 to 6 the relevant design, which will not be repeated here.

[0151] Based on the same inventive concept, the embodiment of the present application also provides a radar system. Refer to Figure 9 , the radar system 900 may include at least one of the foregoing signal transmission circuit 200, processing circuit 901, and signal receiving circuit 902. Among them, the signal transmission circuit 200 is connected to the signal receiving circuit 902, and the signal receiving circuit 902 is connected to the processing circuit 901.

[0152] Among them, the signal transmission circuit 200 can be used to transmit signals; the signal reception circuit 902 can be used to receive the reflected signals corresponding to the signals transmitted by the signal transmission circuit 200, and convert the reflected signals into electrical signals and output them to the processing circuit 901; the processing circuit 901 can be used to process the received electrical signals to obtain detection information.

[0153] In a possible design, the radar system 900 can be disposed on a vehicle, and the radar system 900 is used to detect the road conditions in front of the vehicle.

[0154] In a possible design, the radar system 900 can be disposed on a mobile robot, and the radar system 900 is used to detect the target in front of the mobile robot and plan a route for the mobile robot based on the detection situation.

[0155] Based on the same inventive concept, an embodiment of the present application further provides a radar system. Refer to Figure 10 The radar system 1000 may include at least one of the foregoing signal transmission circuit 200, processing circuit 1001, and foregoing signal reception circuit 800. Among them, the signal transmission circuit 200 is connected to the signal reception circuit 800, and the signal reception circuit 800 is connected to the processing circuit 1001.

[0156] Among them, the signal transmission circuit 200 can be used to transmit signals; the signal reception circuit 800 can be used to receive the reflected signals corresponding to the signals transmitted by the signal transmission circuit 200, and convert the reflected signals into electrical signals and output them to the processing circuit 1001; the processing circuit 1001 can be used to process the received electrical signals to obtain detection information.

[0157] In a possible design, the radar system 1000 can be disposed on a vehicle, and the radar system 1000 is used to detect the road conditions in front of the vehicle.

[0158] In a possible design, the radar system 1000 can be disposed on a mobile robot, and the radar system 1000 is used to detect the target in front of the mobile robot and plan a route for the mobile robot based on the detection situation.

[0159] Based on the same inventive concept, an embodiment of the present application further provides a terminal. The terminal may include the foregoing radar system 900 or the foregoing radar system 1000.

[0160] Among them, the radar system 900 or the radar system 1000 is used to detect the road conditions in front of the terminal.

[0161] Specifically, the terminal may be a drone, an unmanned transport vehicle, a robot, etc.

[0162] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and modifications therein.

Claims

1. A signal transmission circuit, characterized in that, Comprising: A first power supply circuit, a second power supply circuit, and a signal transmitter; The high potential end of the first power supply circuit is connected to the signal transmitter, and the first power supply circuit is used to provide a first voltage for the signal transmitter; The second power supply circuit is connected to the low potential end of the first power supply circuit, and the second power supply circuit is used to provide a second voltage for the first power supply circuit; The signal transmitter is used to transmit a signal at a first power according to the first voltage; wherein, the first voltage is determined according to the second voltage; The second power supply circuit is used to be connected to at least one power supply or the second power supply circuit includes a power supply. When the second power supply circuit is used to be connected to at least one power supply, the second power supply circuit is used to control the connection between the at least one power supply and the first power supply circuit; The first power supply circuit includes an inductor, a seventh switch, a diode, and a first capacitor, or the first power supply circuit includes a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, an eighth switch, a ninth switch, and a tenth switch; The first end of the inductor is used to be connected to a sixth power supply, and the second end of the inductor is respectively connected to the anode of the diode and the first end of the seventh switch; The cathode of the diode is connected to the first end of the first capacitor; The first end of the first capacitor is connected to the signal transmitter, and the second end of the first capacitor is connected to the second end of the seventh switch; The second end of the seventh switch is connected to the second power supply circuit; The first end of the second capacitor is respectively connected to a seventh power supply and the first end of the eighth switch, and the second end of the second capacitor is respectively connected to the first end of the third capacitor and the first end of the ninth switch; The second end of the third capacitor is respectively connected to the first end of the fourth capacitor and the first end of the tenth switch; The second ends of the ninth switch, the tenth switch, and the eighth switch are all connected to the first end of the fifth capacitor; The second end of the fifth capacitor is respectively connected to the second end of the fourth capacitor and the second power supply circuit.

2. The circuit according to claim 1, characterized in that, The positive pole of the second power supply circuit is connected to the low potential end among the output ends of the first power supply circuit, and the negative pole of the second power supply circuit is used to be connected to the signal transmitter.

3. The circuit according to claim 1, characterized in that, The second power supply circuit includes: a first switch and a second switch; The first end of the first switch is connected to the low potential end among the output ends of the first power supply circuit, and the second end of the first switch is used to be connected to a first power supply; The first end of the second switch is connected to the first end of the first switch, and the second end of the second switch is used to be connected to a second power supply.

4. The circuit according to claim 1, characterized in that, The second power supply circuit includes: a third switch, a fourth switch, a fifth switch, and a sixth switch; The first end of the third switch is connected to the low potential end among the output ends of the first power supply circuit, and the second end of the third switch is used to be connected to a third power supply; The first end of the fourth switch is connected to the first end of the third switch, and the second end of the fourth switch is respectively connected to the first end of the fifth switch and the first end of the sixth switch; The second terminal of the fifth switch is used to connect to a fourth power supply; The second terminal of the sixth switch is used to connect to a fifth power supply.

5. The circuit according to any one of claims 1-4, characterized in that, Further included are: An eleventh switch; The first terminal of the eleventh switch is connected to the signal transmitter, and the second terminal of the eleventh switch is connected to the ground wire.

6. The circuit according to any one of claims 1-4, characterized in that, Further included are: At least one controller, where the at least one controller includes a first controller and a second controller; The first controller is used to output a first control signal for the first power supply circuit; The second controller is used to output a second control signal for the second power supply circuit.

7. A manufacturing method of a signal transmission circuit, characterized in that, Including: Forming a first power supply circuit and a second power supply circuit on a substrate; Connecting the high potential terminal of the first power supply circuit to the signal transmitter, and the first power supply circuit is used to provide a first voltage for the signal transmitter; Connecting the second power supply circuit to the low potential terminal of the first power supply circuit, and the second power supply circuit is used to provide a second voltage for the first power supply circuit; The signal transmitter is used to transmit a signal at a first power according to the first voltage; wherein, the first voltage is determined according to the second voltage; The second power supply circuit is used to connect to at least one power supply or the second power supply circuit includes a power supply. When the second power supply circuit is used to connect to at least one power supply, the second power supply circuit is used to control the connection of the at least one power supply to the first power supply circuit; The first power supply circuit includes an inductor, a seventh switch, a diode, and a first capacitor or the first power supply circuit includes a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, an eighth switch, a ninth switch, and a tenth switch; The first terminal of the inductor is used to connect to a sixth power supply, and the second terminal of the inductor is respectively connected to the anode of the diode and the first terminal of the seventh switch; The cathode of the diode is connected to the first terminal of the first capacitor; The first terminal of the first capacitor is connected to the signal transmitter, and the second terminal of the first capacitor is connected to the second terminal of the seventh switch; The second terminal of the seventh switch is connected to the second power supply circuit; The first terminal of the second capacitor is respectively connected to a seventh power supply and the first terminal of the eighth switch, and the second terminal of the second capacitor is respectively connected to the first terminal of the third capacitor and the first terminal of the ninth switch; The second terminal of the third capacitor is respectively connected to the first terminal of the fourth capacitor and the first terminal of the tenth switch; The second terminals of the ninth switch, the tenth switch, and the eighth switch are all connected to the first terminal of the fifth capacitor; The second terminal of the fifth capacitor is respectively connected to the second terminal of the fourth capacitor and the second power supply circuit.

8. A signal receiving circuit, characterized in that, Including: A first power supply circuit, a second power supply circuit, and a signal receiver; The high potential terminal of the first power supply circuit is connected to the signal receiver, and the first power supply circuit is used to provide a first voltage for the signal receiver; The second power supply circuit is connected to the low potential terminal of the first power supply circuit, and the second power supply circuit is used to provide a second voltage for the first power supply circuit. The signal receiver is configured to receive a reflected signal at a second power based on the first voltage, where the reflected signal is generated when the signal transmitted by the signal transmission circuit encounters a target; wherein the first voltage is determined based on the second voltage; The second power supply circuit is configured to be connected to at least one power supply or the second power supply circuit includes a power supply. When the second power supply circuit is configured to be connected to at least one power supply, the second power supply circuit is configured to control the connection between the at least one power supply and the first power supply circuit; The first power supply circuit includes an inductor, a seventh switch, a diode, and a first capacitor, or the first power supply circuit includes a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, an eighth switch, a ninth switch, and a tenth switch; The first end of the inductor is configured to be connected to a sixth power supply, and the second end of the inductor is respectively connected to the anode of the diode and the first end of the seventh switch; The cathode of the diode is connected to the first end of the first capacitor; The first end of the first capacitor is connected to the signal transmitter, and the second end of the first capacitor is connected to the second end of the seventh switch; The second end of the seventh switch is connected to the second power supply circuit; The first end of the second capacitor is respectively connected to a seventh power supply and the first end of the eighth switch, and the second end of the second capacitor is respectively connected to the first end of the third capacitor and the first end of the ninth switch; The second end of the third capacitor is respectively connected to the first end of the fourth capacitor and the first end of the tenth switch; The second ends of the ninth switch, the tenth switch, and the eighth switch are all connected to the first end of the fifth capacitor; The second end of the fifth capacitor is respectively connected to the second end of the fourth capacitor and the second power supply circuit.

9. A radar system, characterized in that, Comprising at least one of a processing circuit, a signal receiving circuit, and the signal transmission circuit according to any one of claims 1-6; The signal transmission circuit is connected to the signal receiving circuit and is configured to transmit a signal; The signal receiving circuit is connected to the processing circuit and is configured to receive a reflected signal corresponding to the signal transmitted by the signal transmission circuit and convert the reflected signal into an electrical signal and output it to the processing circuit; The processing circuit is configured to process the received electrical signal to obtain detection information.

10. A radar system, characterized in that, Comprising at least one of a processing circuit, the signal transmission circuit according to any one of claims 1-6, and the signal receiving circuit according to claim 8; The signal transmission circuit is connected to the signal receiving circuit and is configured to transmit a signal; The signal receiving circuit is connected to the processing circuit and is configured to receive a reflected signal corresponding to the signal transmitted by the signal transmission circuit and convert the reflected signal into an electrical signal and output it to the processing circuit; The processing circuit is configured to process the received electrical signal to obtain detection information.

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