Low noise amplifier, GNSS performance dynamic adjustment system and electronic equipment

Abstract

The utility model discloses a low noise amplifier, a GNSS performance dynamic adjustment system and electronic equipment. The low-noise amplifier comprises a bias module and an operational amplifier, and the bias module is connected with an enabling port and a power supply port of the low-noise amplifier; the bias module is configured to control the working state of the operational amplifier according to a level signal received from the enable port so as to change the gain parameter of the low noise amplifier. According to the low-noise amplifier, the working state of the bias module can be controlled by using the enable signal, the working state of the operational amplifier is indirectly controlled, and the output signal of the operational amplifier is adjusted in the working process of the low-noise amplifier, so that the working state of the low-noise amplifier is adjusted; the overall gain of the low-noise amplifier is changed, and the overall performance and function of the GNSS link are further maintained by adjusting the working state of the low-noise amplifier when the low-noise amplifier is applied to the GNSS link.

Description

Technical Field

[0001] This application relates to the field of electronic communication technology, specifically to a low-noise amplifier, a GNSS performance dynamic adjustment system, and electronic equipment. Background Technology

[0002] The application of satellite positioning functions in electronic devices is becoming increasingly widespread. In GNSS links, the overall performance of hardware architectures using low-noise amplifiers (LNAs) is greatly affected by the performance of the LNAs themselves. However, in current technologies, because the gain performance of LNAs is relatively fixed, it is almost impossible to quickly correct and adjust the entire GNSS link in a timely manner when signal loss or overload saturation occurs, leading to a decline in the overall performance and functionality of the GNSS link. Utility Model Content

[0003] This application provides a low-noise amplifier, a GNSS performance dynamic adjustment system, and an electronic device.

[0004] The low-noise amplifier disclosed in this application includes a bias module and an operational amplifier, wherein the bias module is connected to the enable port and the power supply port of the low-noise amplifier.

[0005] The bias module is configured to control the operating state of the operational amplifier based on a level signal received from the enable port, thereby changing the gain parameter of the low-noise amplifier.

[0006] Thus, the low-noise amplifier in this application can use the enable signal to control the working state of the bias module, thereby indirectly controlling the working state of the operational amplifier. During the operation of the low-noise amplifier, the output signal of the operational amplifier is adjusted, thereby adjusting the working state of the low-noise amplifier to change the overall gain of the low-noise amplifier. Furthermore, when the low-noise amplifier is applied in a GNSS link, the overall performance and function of the GNSS link can be maintained by adjusting the working state of the low-noise amplifier.

[0007] In some implementations, the first input of the bias module is connected to the enable port, and the second input of the bias module is connected to the power supply port.

[0008] In some implementations, the first output of the bias module is connected to the inverting input of the operational amplifier, and the second output of the bias module is connected to the bypass module.

[0009] The first end of the bypass module is connected to the non-inverting input of the operational amplifier, and the second end of the bypass module is connected to the output of the operational amplifier.

[0010] In some embodiments, the bypass module includes a switching element and a bypass capacitor, wherein the switching element and the bypass capacitor are connected in series, and the second output terminal of the bias module is connected to the switching element.

[0011] The on / off element is configured to switch the bypass module on or off state according to the level signal at the enable port, controlled by the bias module.

[0012] In some embodiments, the non-inverting input of the operational amplifier is connected to the radio frequency input port of the low noise amplifier via a first capacitor, the output of the operational amplifier is connected to the radio frequency output port of the low noise amplifier via a second capacitor, and the power supply of the operational amplifier is connected to the power supply port of the low noise amplifier.

[0013] The performance dynamic adjustment system in this application includes one or more of the aforementioned low-noise amplifiers, microcontrollers, and GNSS control chips. The microcontroller is connected to the enable port of the low-noise amplifier via a first control port.

[0014] The GNSS control chip is configured to control the microcontroller to output an enable signal to the enable port of the low-noise amplifier and to receive radio frequency signals sent by the low-noise amplifier.

[0015] In some embodiments, the GNSS control chip is further provided with a second control port, which is connected to the first control port of the micro control chip.

[0016] The GNSS control chip sends a control signal to the first control port of the micro control chip through the second control port, so as to control the micro control chip to output an enable signal to the enable port of the low noise amplifier.

[0017] In some embodiments, the system further includes an antenna and at least two filters connected in series between the antenna and the low-noise amplifier, or between two adjacent low-noise amplifiers, or between the low-noise amplifier and the GNSS control chip.

[0018] In some embodiments, the first end of the filter is connected to the RF output port of the antenna or the low-noise amplifier, and the second end of the filter is connected to the RF input port of the low-noise amplifier or the signal receiving port of the GNSS control chip.

[0019] The electronic devices in the embodiments of this application include the low-noise amplifier described above, or the GNSS performance dynamic adjustment system described above.

[0020] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the module structure of the low-noise amplifier in the embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the circuit structure of the low-noise amplifier in the embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the module structure of the GNSS performance dynamic adjustment system in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the circuit structure of the GNSS performance dynamic adjustment system in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the circuit structure of the GNSS performance dynamic adjustment system in the embodiments of this application.

[0027] Wherein: Bias, bias module; VDD, power supply port; EN, enable port; RFIN, RF input port; RFOUT, RF output port; GND, ground port; U, operational amplifier; C1, first capacitor; C2, second capacitor; Bypass, bypass module; SW, switching element; C, bypass capacitor; ANT, antenna; Filter-1, first filter; LNA, low noise amplifier; Filter-2, second filter; MCU, micro control chip; CNSSIC, CNSS control chip; LNA-1, first low noise amplifier; LNA-2, second low noise amplifier; Filter-3, third filter. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0029] Please see Figure 1The low-noise amplifier in this application includes a bias module and an operational amplifier. The bias module is connected to the enable port and the power supply port of the low-noise amplifier.

[0030] The bias module is configured to control the operating state of the operational amplifier based on the level signal received from the enable port, thereby changing the gain parameter of the low-noise amplifier.

[0031] Specifically, this application discloses a low-noise amplifier (LNA), whose main function is to amplify signals such as radio frequency signals while minimizing its own noise to maintain a high signal-to-noise ratio in the output signal. However, in current related technologies, the gain parameter of an LNA cannot be adjusted. In GNSS links using LNAs, when signal source fluctuations cause signal loss or signal overload, the GNSS link cannot be adjusted in real time by changing the LNA's gain parameter, resulting in a degradation of the GNSS link's performance and functionality.

[0032] Therefore, the low-noise amplifier in this embodiment of the application additionally provides a control function for the operational amplifier in the bias module. Specifically, the bias module in the low-noise amplifier is connected to the enable port of the low-noise amplifier to receive an enable signal from the outside. When the bias module receives the enable signal from the outside, it can control and change the operating state of the operational amplifier through the control function set between it and the operational amplifier, thereby adjusting the output signal of the operational amplifier and thus adjusting the overall gain parameter of the low-noise amplifier. The gain parameter refers to the factor by which the output signal is amplified compared to the input signal, generally in dB. In this way, when the low-noise amplifier in the above embodiment is applied to the GNSS link, the gain parameter of the low-noise amplifier can be adjusted according to the strength of the input signal by controlling the operating state of the operational amplifier through the bias module using the enable signal. This allows the low-noise amplifier to cooperate with changes in the input signal, maintaining the overall performance and function of the GNSS link as much as possible and avoiding signal loss or overload in the GNSS link.

[0033] Thus, the low-noise amplifier in this application can use the enable signal to control the working state of the bias module, thereby indirectly controlling the working state of the operational amplifier. During the operation of the low-noise amplifier, the output signal of the operational amplifier is adjusted, thereby adjusting the working state of the low-noise amplifier to change the overall gain of the low-noise amplifier. Furthermore, when the low-noise amplifier is applied in a GNSS link, the overall performance and function of the GNSS link can be maintained by adjusting the working state of the low-noise amplifier.

[0034] Please see Figure 2In some implementations, the first input of the bias module is connected to the enable port, and the second input of the bias module is connected to the power supply port.

[0035] In some implementations, the first output of the bias module is connected to the inverting input of the operational amplifier, and the second output of the bias module is connected to the bypass module.

[0036] The first end of the bypass module is connected to the non-inverting input of the operational amplifier, and the second end of the bypass module is connected to the output of the operational amplifier.

[0037] In some implementations, the bypass module includes a switching element and a bypass capacitor, which are connected in series, and the second output terminal of the bias module is connected to the switching element.

[0038] The switching element is configured to switch the bypass module on or off state according to the level signal at the enable port, controlled by the bias module.

[0039] In some implementations, the non-inverting input of the operational amplifier is connected to the RF input port of the low-noise amplifier via a first capacitor, the output of the operational amplifier is connected to the RF output port of the low-noise amplifier via a second capacitor, and the power supply of the operational amplifier is connected to the power supply port of the low-noise amplifier.

[0040] Specifically, based on the above implementation methods, please refer to... Figure 2 , Figure 2 An exemplary circuit module structure of a low-noise amplifier according to an embodiment of this application is shown.

[0041] In some examples, the low-noise amplifier has five external ports: power supply port VDD, enable port EN, ground port GND, RF input port RFIN, and RF output port RFOUT.

[0042] The power supply port VDD connects to an external power source, primarily to power the bias module (Bias) and operational amplifier (U), ensuring their proper functioning. When the external power supply is disconnected, the low-noise amplifier is completely off.

[0043] The enable port EN connects externally to a controller that can output an enable signal. Inside the low-noise amplifier, it connects to a bias module (Bias). The bias module (Bias) can be a type of bias module used in various filters currently available in related technologies, and its parameters can be adjusted according to the application scenario of the low-noise amplifier. The main function of the bias module (Bias) is to establish a stable DC operating point in the low-noise amplifier circuit, thereby ensuring that active components such as operational amplifiers operate in the linear region, while also preventing cutoff frequency drift caused by signal offset. Furthermore, the bias module (Bias), through its connection to the enable port EN, can receive enable signals from external controllers and control the operating state of operational amplifier U in response to these enable signals.

[0044] The RF input port RFIN and the RF output port RFOUT are the signal input and signal output terminals of the low-noise amplifier, respectively. The RF signal enters the low-noise amplifier from the RF input port RFIN, and after being amplified by the low-noise amplifier, the amplified signal is output from the RF output port RFOUT.

[0045] The grounding port GND is connected to ground during the application of the low-noise amplifier to ensure the power safety of the low-noise amplifier.

[0046] In some examples, the bias module (Bias) is further provided with two sets of input terminals and two sets of output terminals. The first input terminal of the bias module (Bias) is used for signal input, specifically connected to the enable port EN of the low-noise amplifier. The enable signal sent by the external controller is received by the bias module (Bias) via the enable port EN of the low-noise amplifier and the first input terminal. The second input terminal is used for power input, specifically connected to the power supply port VDD of the low-noise amplifier. The external power supply supplies power to the bias module (Bias) through the power supply port VDD and the aforementioned second input terminal.

[0047] As for the output of the bias module Bias, the first output is normally connected to one of the inputs of the operational amplifier U, which can be the inverting input of the operational amplifier U, to normally realize the bias current input function of the bias module Bias. The second output is connected to the bypass module Bypass, which can directly control and adjust the operating state of the operational amplifier U. The bypass module Bypass is connected between the other input and output of the operational amplifier U.

[0048] For example, the bypass module is connected between the non-inverting input and output of operational amplifier U. The non-inverting input of operational amplifier U is connected to the RF input port RFIN of low-noise amplifier via a first capacitor C1, and the output of operational amplifier U is connected to the output port of low-noise amplifier via a second capacitor C2. The power supply of operational amplifier U is connected to the power supply port VDD of low-noise amplifier. The first capacitor C1, the bypass capacitor C, and the second capacitor C2 all serve to block DC current, ensuring correct input and output of RF signals.

[0049] Based on the above connection, when the external power supply is normally supplying power to the low noise amplifier, when the bias module Bias receives the enable signal from the enable port EN, it sends a status control signal corresponding to the enable signal to the bypass module Bypass via the second output terminal. After receiving the above status control signal, the bypass module Bypass can switch its own working state, thereby indirectly controlling the working state of the operational amplifier U, and ultimately changing the overall gain parameter exhibited by the low noise amplifier.

[0050] In some examples, the bypass module typically includes a series switching element SW and a bypass capacitor C. Please refer to [link to relevant documentation]. Figure 2 The switching element SW can be represented as a contact switch. The second output terminal of the bias module Bias is electrically connected to the switching element SW. The bias module Bias can send a status control signal to the switching element SW through the second output terminal.

[0051] Specifically, in the default operating state, the enable port EN of the low noise amplifier receives a high-level enable signal. At this time, the second output of the bias module Bias sends a first state control signal to the switching element SW. In response to the first state control signal, the switching element SW remains in the off state, that is, the bypass module Bypass is disconnected. At this time, the operational amplifier U is in normal operating state, and the gain coefficient of the low noise amplifier is the default gain coefficient.

[0052] When a low-level enable signal is input to the enable port EN of the low-noise amplifier, the second output of the bias module Bias sends a second state control signal to the switching element SW. In response to the second state control signal, the switching element SW closes, that is, the bypass module Bypass is turned on and connected between the non-inverting input and output of the operational amplifier U. At this time, the operational amplifier U is in bypass mode. The low-noise amplifier as a whole has a normal path for the input signal, but the gain parameter is 0, that is, the output signal is the same as the input signal.

[0053] Conversely, if in the current state, the switching element SW in the bypass module Bypass is closed, that is, when the bypass module Bypass is turned on and connected between the non-inverting input and output of the operational amplifier U, if the enable port EN of the low-noise amplifier receives a high-level enable signal, the second output of the bias module Bias sends a first state control signal to the switching element SW. In response to the first state control signal, the switching element SW is turned off, the operational amplifier U returns to its normal operating state, and the gain coefficient of the low-noise amplifier returns to the default gain coefficient.

[0054] In this way, the bias module Bias sends the corresponding status control signal to the on / off element SW in the bypass module Bypass according to the enable signal received at the enable port EN. By controlling the on / off element SW, the bypass module Bypass is turned on or off as a whole. This changes the operating state of the operational amplifier U by changing the connection method of the operational amplifier U, thereby adjusting and controlling the gain parameters of the low-noise amplifier as a whole.

[0055] Please see Figure 3 The GNSS performance dynamic adjustment system in this application includes one or more of the aforementioned low-noise amplifiers, microcontrollers, and GNSS control chips. The microcontroller is connected to the enable port of the low-noise amplifier through a first control port.

[0056] The GNSS control chip is configured to control the microcontroller to output an enable signal to the enable port of the low-noise amplifier and to receive radio frequency signals sent by the low-noise amplifier.

[0057] Specifically, based on the above embodiments, a GNSS performance dynamic adjustment system can be constructed using the low-noise amplifier described above. This system can serve as a GNSS link to perform signal reception and amplification. For example, the system typically includes one or more low-noise amplifiers, a microcontroller chip, and a GNSS control chip.

[0058] In this system, the low-noise amplifier (LNOA) amplifies the received radio frequency (RF) signal and then sends the amplified signal to the GNSS control chip. It's important to note that when multiple LNOA amplifiers are used, the signal is typically amplified in multiple stages. That is, after the first LNOA amplifier amplifies and outputs the amplified signal, the second LNOA amplifier amplifies it again, and so on, until the amplified signal is finally sent to the GNSS control chip.

[0059] The microcontroller chip connects to the enable port of the low-noise amplifier (LNOA) via its own first control port. This means the microcontroller chip can send enable signals to the LNOA through this connection, indirectly adjusting and controlling the overall gain parameters of the LNOA. It's important to note that the number of first control ports on the microcontroller chip should generally be greater than or equal to the number of LNOA in the system to ensure that gain parameter adjustment and control can be achieved for each LNOA. The action of the microcontroller chip sending enable signals to the LNOA is controlled by the GNSS control chip. The GNSS control chip and the microcontroller chip typically have a communication connection, and control can be achieved by sending enable signal control commands to the microcontroller chip.

[0060] In some implementations, the GNSS control chip is further provided with a second control port, which is connected to the first control port of the microcontroller chip.

[0061] The GNSS control chip sends a control signal to the first control port of the microcontroller chip through the second control port, so as to control the microcontroller chip to output an enable signal to the enable port of the low-noise amplifier.

[0062] Specifically, regarding the control process of the GNSS control chip sending an enable signal to the microcontroller chip, for example, the GNSS control chip communicates with the first control port on the microcontroller chip via its own second control port. It should be noted that the number of second control ports should be greater than or equal to the number of low-noise amplifiers to ensure a unique connection between the low-noise amplifiers, the first control port of the microcontroller chip, and the second control port of the GNSS control chip.

[0063] Based on the aforementioned connection, in the default state, the microcontroller sends a high-level enable signal to the low-noise amplifier to control it to operate with normal gain parameters. When the GNSS control chip sends a control signal to the microcontroller via communication, the microcontroller, upon receiving the control signal, sends a low-level enable signal to the low-noise amplifier to adjust its gain parameter to 0, thereby controlling the low-noise amplifier's operating state.

[0064] Please see Figure 4 as well as Figure 5 In some embodiments, the system further includes an antenna and at least two filters connected in series between the antenna and a low-noise amplifier, or between two adjacent low-noise amplifiers, or between a low-noise amplifier and a GNSS control chip.

[0065] In some implementations, the first end of the filter is connected to the RF output port of the antenna or the low-noise amplifier, and the second end of the filter is connected to the RF input port of the low-noise amplifier or the signal receiving port of the GNSS control chip.

[0066] Specifically, based on the above implementation methods, please refer to the example provided. Figure 4 and Figure 5 , Figure 4 and Figure 5 Examples of two connection methods for the GNSS performance dynamic adjustment system described above are provided. The GNSS performance dynamic adjustment system further includes an antenna (ANT) and at least two filters. The ANT captures radio frequency (RF) signals from the environment and inputs them into a low-noise amplifier for amplification. The filters primarily perform filtering on the RF signals before they enter the low-noise amplifier or the GNSS control chip (GNSS IC), minimizing glitches or other noise in the signal to prevent significant amplification of these glitches or noise during amplification and thus avoid negatively impacting signal quality. Alternatively, the filters perform final processing on the RF signals before the GNSS control chip (GNSS IC) receives them, ensuring the signal quality of the RF signals received by the GNSS control chip.

[0067] Please refer to Figure 4 , Figure 4 This illustration shows the case using a single low-noise amplifier (LNA). After the antenna ANT receives the RF signal, the RF signal is filtered by the first filter Filter-1 and then input to the RF input port RFIN of the LNA. After amplification, the RF output port RFOUT of the LNA is filtered by the second filter Filter-2 and then sent to the signal receiving port GNSS_IN of the GNSS control chip GNSSIC. Furthermore, the second control port Control_A of the GNSS control chip GNSS IC is communicatively connected to the first control port Control_1 of the microcontroller chip MCU. The first control port Control_1 of the microcontroller chip MCU is connected to the enable port EN of the LNA. The power supply port VDD of the LNA is powered by an external power source, and the ground port GND is grounded.

[0068] for Figure 4The illustrated GNSS performance dynamic adjustment system operates as follows: When powered by an external power source via the VDD power supply port, the low-noise amplifier (LNA) enters normal operation. At this time, the GNSS control chip (GNSSIC) performs analysis based on the radio frequency (RF) signal received through the GNSS_IN signal receiving port. Exemplarily, this analysis process includes at least orthogonal decomposition analysis and carrier-to-noise ratio (CNR) calculation of the received RF signal. If the results of the orthogonal decomposition analysis and CNR calculation meet expectations, the current operating state remains unchanged, and the analysis of the received RF signal continues.

[0069] When the GNSS control chip GNSSIC performs analysis based on the RF signal received through its signal receiving port GNSS_IN, and detects an anomaly in at least one of the orthogonal decomposition analysis results or the carrier-to-noise ratio calculation results, it can send a control signal through the second control port Control_A to the first control port Control_1 of the microcontroller MCU. This control signal can be an AT command or other type of command signal. Upon receiving this control signal, the microcontroller MCU sends an enable signal through the first control port Control_1 to the enable port EN of the low-noise amplifier (LNA), thereby controlling the operational amplifier in the LNA to operate in bypass mode to attempt to eliminate the anomaly in the signal analysis results. Specifically, besides adjusting the LNA gain parameters by sending control signals through the GNSS control chip GNSSIC, the LNA gain parameters can also be adjusted by setting an automatic control program at the microcontroller MCU or by manually inputting an enable signal.

[0070] In addition, when the GNSS function needs to be turned off, the external power supply can be disconnected manually or by the microcontroller chip (MCU) to shut down the low-noise amplifier (LNA).

[0071] Please refer to Figure 5 , Figure 5This diagram illustrates the use of two low-noise amplifiers. After receiving the RF signal, the antenna ANT filters it through Filter-1 and then inputs it to the RF input port of the first low-noise amplifier LNA-1. After amplification, the signal is filtered through Filter-2 from the RF output port (RFOUT) of the first low-noise amplifier LNA-1 and then sent to the RF input port of the second low-noise amplifier LNA-2. After further amplification by the second low-noise amplifier LNA-2, the signal is filtered through Filter-3 from the RF output port (RFOUT) of the second low-noise amplifier LNA-2 and then sent to the signal receiving port (GNSS_IN) of the GNSS control chip GNSSIC. Both the first low-noise amplifier LNA-1 and the second low-noise amplifier LNA-2 are powered by an external power supply (VDD), and their ground ports (GND) are grounded. In addition, the second control port Control_A in the GNSS control chip GNSSIC is communicatively connected to the first control port Control_1 of the microcontroller chip MCU. The first control port Control_1 of the microcontroller chip MCU is connected to the enable port EN of the first low noise amplifier LNA-1. The second control port Control_B in the GNSS control chip GNSS IC is communicatively connected to the first control port Control_2 of the microcontroller chip MCU. The first control port Control_2 of the microcontroller chip MCU is connected to the enable port EN of the second low noise amplifier LNA-2.

[0072] for Figure 5 The illustrated GNSS performance dynamic adjustment system operates normally when powered by an external power source via the VDD power supply port. Both the first low-noise amplifier (LNA-1) and the second low-noise amplifier (LNA-2) enter normal working condition. At this time, the GNSS control chip (GNSS IC) performs analysis based on the radio frequency (RF) signal received through the GNSS_IN signal receiving port. For example, the analysis process includes at least orthogonal decomposition analysis and carrier-to-noise ratio (CNR) calculation of the received RF signal. If the results of the orthogonal decomposition analysis and CNR calculation meet expectations, the current operating state remains unchanged, and the analysis of the received RF signal continues.

[0073] When the GNSS control chip GNSSIC performs analysis based on the radio frequency signal received through the signal receiving port GNSS_IN, and detects an anomaly in at least one of the orthogonal decomposition analysis results and the carrier-to-noise ratio calculation results, it can select at least one of the first low-noise amplifier LNA-1 and the second low-noise amplifier LNA-2 to control and adjust the gain coefficient according to the anomaly.

[0074] For adjusting the first low-noise amplifier (LNA-1), a control signal is sent from the second control port Control_A to the first control port Control_1 of the microcontroller chip (MCU). This control signal can be an AT command or other type of command signal. Upon receiving the control signal, the MCU sends an enable signal from the first control port Control_1 to the enable port EN of the low-noise amplifier, thereby controlling the operational amplifier in the first low-noise amplifier LNA-1 to operate in bypass mode. For adjusting the second low-noise amplifier (LNA-2), a control signal is sent from the second control port Control_B to the first control port Control_2 of the MCU. Upon receiving the control signal, the MCU sends an enable signal from the first control port Control_2 to the enable port EN of the second low-noise amplifier LNA-2, thereby controlling the operational amplifier in the second low-noise amplifier LNA-2 to operate in bypass mode. In particular, in addition to adjusting the gain parameters of the two low-noise amplifiers by sending control signals through the GNSS control chip GNSSIC, the gain parameters of the low-noise amplifiers can also be controlled by setting an automatic control program at the micro control chip MCU or by manually inputting an enable signal.

[0075] In addition, when the GNSS function needs to be turned off, the external power supply can be disconnected manually or by the microcontroller chip MCU to turn off the first low noise amplifier LNA-1 and the second low noise amplifier LNA-2.

[0076] It is important to note that Figure 4 and Figure 5 The examples shown are only structural illustrations of GNSS performance dynamic adjustment systems using one and two low-noise amplifiers, respectively. In practical applications, the number of low-noise amplifiers and corresponding filters should be adjusted according to the actual amplification requirements. Figure 4 and Figure 5 For illustrative purposes only and should not be construed as limiting the number of low-noise amplifiers and filters.

[0077] The electronic devices in the embodiments of this application include the low-noise amplifier described above, or the GNSS performance dynamic adjustment system described above.

[0078] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A low-noise amplifier, characterized in that, The low-noise amplifier includes a bias module and an operational amplifier. The bias module is connected to the enable port and the power supply port of the low-noise amplifier. The bias module is configured to control the operating state of the operational amplifier based on a level signal received from the enable port, thereby changing the gain parameter of the low-noise amplifier.

2. The low-noise amplifier according to claim 1, characterized in that, The first input terminal of the bias module is connected to the enable port, and the second input terminal of the bias module is connected to the power supply port.

3. The low-noise amplifier according to claim 1, characterized in that, The first output terminal of the bias module is connected to the inverting input terminal of the operational amplifier, and the second output terminal of the bias module is connected to the bypass module. The first end of the bypass module is connected to the non-inverting input of the operational amplifier, and the second end of the bypass module is connected to the output of the operational amplifier.

4. The low-noise amplifier according to claim 3, characterized in that, The bypass module includes a switching element and a bypass capacitor, which are connected in series. The second output terminal of the bias module is connected to the switching element. The on / off element is configured to switch the bypass module on or off state according to the level signal at the enable port, controlled by the bias module.

5. The low-noise amplifier according to any one of claims 1-4, characterized in that, The non-inverting input terminal of the operational amplifier is connected to the RF input port of the low-noise amplifier via a first capacitor, the output terminal of the operational amplifier is connected to the RF output port of the low-noise amplifier via a second capacitor, and the power supply terminal of the operational amplifier is connected to the power supply port of the low-noise amplifier.

6. A GNSS performance dynamic adjustment system, characterized in that, The system includes one or more low-noise amplifiers, microcontrollers, and GNSS controllers as described in any one of claims 1-5, wherein the microcontroller is connected to the enable port of the low-noise amplifier via a first control port. The GNSS control chip is configured to control the microcontroller to output an enable signal to the enable port of the low-noise amplifier and to receive radio frequency signals sent by the low-noise amplifier.

7. The system according to claim 6, characterized in that, The GNSS control chip is also provided with a second control port, which is connected to the first control port of the micro control chip. The GNSS control chip sends a control signal to the first control port of the micro control chip through the second control port, so as to control the micro control chip to output an enable signal to the enable port of the low noise amplifier.

8. The system according to claim 6, characterized in that, The system also includes an antenna and at least two filters, which are connected in series between the antenna and the low-noise amplifier, or in series between two adjacent low-noise amplifiers, or between the low-noise amplifier and the GNSS control chip.

9. The system according to claim 8, characterized in that, The first end of the filter is connected to the RF output port of the antenna or the low-noise amplifier, and the second end of the filter is connected to the RF input port of the low-noise amplifier or the signal receiving port of the GNSS control chip.

10. An electronic device, characterized in that, The electronic device includes a low-noise amplifier as described in any one of claims 1-5, or a GNSS performance dynamic adjustment system as described in any one of claims 6-9.

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