A method and system for designing a ramped bias circuit for a mixer

Abstract

This invention discloses a method and system for designing a gradually rising bias circuit for a mixer, relating to the field of gradually rising bias circuit technology. The method includes: obtaining the current-voltage characteristic curve of the mixer; determining the voltage value at the point of maximum curvature in the current-voltage characteristic curve as the target voltage; setting the gradually rising bias circuit based on the target voltage, ensuring that the output voltage of the gradually rising bias circuit is within a preset range including the target voltage; the provided gradually rising bias circuit provides an adjustable bias voltage for the mixer, ensuring that the mixer operates near its optimal operating point in application; simultaneously, the circuit has functions of gradually rising, gradually falling, and current limiting protection, solving the feasibility problem of mixers in practical system integration.

Description

Technical Field

[0001] This invention relates to the field of gradual rise bias circuit technology, and more specifically, to a method and system for designing a gradual rise bias circuit for a mixer. Background Technology

[0002] For detection systems, obtaining a signal with a high signal-to-noise ratio is one of the primary objectives. Mixers are crucial components commonly used in detection circuits, with applications including terahertz, radio frequency, microwave, and optical communication systems. They are indispensable core components, their core function being the conversion and demodulation of signal frequencies. To ensure the internal components of the mixer operate in a specific, optimal state, achieving efficient and low-noise frequency conversion, a DC bias voltage is typically applied. The mixer's operating state directly depends on its voltage and current, i.e., the bias point or quiescent operating point. Without a bias circuit, the device will be in a random and uncertain state, significantly increasing conversion losses. However, with a bias circuit, the device's operating state can be precisely controlled.

[0003] Mixer devices have a wide range of applications, and each device is custom-designed due to differences in device characteristics and application requirements. In far-infrared laser diagnostic systems for tokamak devices, terahertz mixers are commonly used for signal detection. Because terahertz wavelengths are short, the Schottky junctions in the mixers are micro-nano structures and can only withstand relatively small currents, typically less than 1mA. Therefore, instantaneous spike voltages during bias circuit switching or overcurrents caused by improper circuit parameter design can damage the mixer device. Thus, the bias circuit design of the mixer needs to: provide a stable and adjustable bias voltage value suitable for the device parameters, allowing the device to operate at the optimal bias point; and protect the device from damage caused by excessive input voltage or noise. However, this is currently not achievable in far-infrared laser diagnostic systems.

[0004] Therefore, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for designing a slow-rise bias circuit for a mixer. The bias circuit designed in this way has slow-rise, slow-fall, and overcurrent protection functions, and also has the flexibility of bias voltage adjustment, which can solve the problems of safety and convenience in the use of mixers.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: In a first aspect, this application provides a method for designing a mixer's gradual bias circuit, comprising the following specific steps: Obtain the current-voltage characteristic curve of the mixer; The voltage value at the point of maximum curvature in the current-voltage characteristic curve is determined as the target voltage. The gradual rise bias circuit is set based on the target voltage, and the output voltage of the gradual rise bias circuit is within a preset range including the target voltage.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the aforementioned gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

[0009] Furthermore, the aforementioned gradually increasing positive bias circuit includes a DC power supply, capacitors C1, C2, C3, C4, C5, and C6 connected together, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency devices.

[0010] Furthermore, the aforementioned gradual negative bias circuit includes a DC power supply, capacitors C1, C2, C3, and C4, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency devices that are connected together.

[0011] Furthermore, the positive terminal of the aforementioned DC power supply is sequentially connected to one end of capacitor C1, one end of capacitor C2, the first port of the voltage regulator chip, one end of capacitor C3, one end of resistor R4, one end of capacitor C5, one end of capacitor C6, the output terminal of the diode, and one end of the mixer; the negative terminal of the DC power supply is connected to one end of resistor R1, and the other end of resistor R1 is sequentially connected to the other end of capacitor C1, the other end of capacitor C2, and the second port of the voltage regulator chip; the third port of the voltage regulator chip is sequentially connected to the other end of capacitor C3, one end of capacitor C4, and the source of the field-effect transistor, and the gate of the field-effect transistor is connected to the other end of capacitor C4 and the other end of resistor R4; the drain of the field-effect transistor is connected to the other end of capacitor C5 and the fixed terminal of potentiometer R2, and the adjusting terminal of potentiometer R2 is sequentially connected to the other end of capacitor C6, the input terminal of the diode, and one end of resistor R3, and the other end of resistor R3 and the other end of the mixer are both connected to radio frequency devices.

[0012] Furthermore, the negative terminal of the aforementioned DC power supply is sequentially connected to the first port of the voltage regulator chip, one end of capacitor C1, one end of resistor R4, one end of capacitor C3, one end of capacitor C4, the input terminal of the diode, and the mixer; the positive terminal of the DC power supply is connected to one end of resistor R1, the other end of resistor R1 is connected to the second port of the voltage regulator chip, the third port of the voltage regulator chip is sequentially connected to the other end of capacitor C1, one end of capacitor C2, and the source of the field-effect transistor, the gate of the field-effect transistor and the other end of capacitor C2 are both connected to the other end of resistor R4; the drain of the field-effect transistor is sequentially connected to the other end of capacitor C3 and the fixed terminal of potentiometer R2, the adjusting terminal of potentiometer R2 is sequentially connected to the other end of capacitor C4, the output terminal of the diode, and one end of resistor R3, the other end of resistor R3 and the other end of the mixer are both connected to the radio frequency device.

[0013] Secondly, this application provides a mixer's gradual rise bias circuit design system, applicable to the gradual rise bias circuit design method of a mixer according to any one of the first aspects, including: Curve acquisition module, used to acquire the current-voltage characteristic curve of the mixer; The target voltage determination module is used to determine the voltage value at the point of maximum curvature in the current-voltage characteristic curve as the target voltage. The circuit setting module is used to set the gradually increasing bias circuit based on the target voltage. The output voltage of the gradually increasing bias circuit is within a preset range that includes the target voltage.

[0014] Furthermore, the aforementioned gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

[0015] Thirdly, this application provides an electronic device, including: at least one processor, at least one memory, and a data bus; In this system, the processor and memory communicate with each other via a data bus; the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute a mixer's slow-rise bias circuit design method as described in any of the first aspects.

[0016] Fourthly, this application provides a non-transitory computer-readable storage medium that stores computer instructions, which cause a computer to execute a mixer's gradual bias circuit design method according to any one of the first aspects.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: In this application, the provided slow-rise bias circuit provides an adjustable bias voltage for the mixer, ensuring that the mixer operates near its optimal operating point in application. Simultaneously, the circuit features slow-rise, slow-fall, and current-limiting protection functions, resolving the feasibility issue of the mixer in practical system integration. The rise time of the slow-rise bias circuit is 1ms in practical use, and the fall time is 2ms, with no switching spike pulses, effectively protecting the mixer. Furthermore, by adjusting the potentiometer, the mixer operates in a more ideal state, and the optimal operating point of the mixer shows high consistency with the tested IV characteristic curve, optimizing the signal-to-noise ratio of the probe signal. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating the design method in an embodiment of the present invention. Figure 2 This is a schematic diagram of the connection of the gradually increasing positive bias circuit in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection of the gradually increasing negative bias circuit in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, "multiple" means at least two.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0026] Example 1: To provide a stable and adjustable bias voltage value suitable for device parameters, enabling the device to operate at the optimal bias point, and to avoid damage to the device from excessive input voltage or noise, this example provides a method for designing a mixer's gradual bias circuit, such as... Figure 1 As shown, the specific steps include the following: S1, obtain the current-voltage characteristic curve of the mixer.

[0027] S2, the voltage value at the point of maximum curvature in the current-voltage characteristic curve is determined as the target voltage.

[0028] S3, based on the target voltage, completes the setting of the gradual rise bias circuit, and the output voltage of the gradual rise bias circuit is within a preset range including the target voltage.

[0029] In step S1 above, the preparatory work for circuit design can be carried out at the beginning of the circuit design. The current-voltage characteristic (IV) curve of the mixer can be obtained through testing or experimentation. The curved part (i.e. the non-linear part) of the IV curve represents the nonlinear operating region of the device. The point with the largest curvature is the region with the strongest nonlinearity.

[0030] In step S2 above, the point with the largest curvature is usually set as the DC bias point, which can make the device have the lowest frequency conversion loss for small input signals. This voltage value is used as the design reference for the bias voltage circuit.

[0031] The bias polarity of the mixer can be positive or negative, determined by the internal circuitry of the device. The bias of the mixer is provided by a battery. In applications that are extremely sensitive to power supply noise, the battery can provide a cleaner DC voltage than a linear power supply. A linear power supply is a complex electronic system that needs to process and convert noisy AC power from the mains. This process inevitably introduces various interferences, such as grid pollution and ground interference.

[0032] In step S3 above, the gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

[0033] Among them, such as Figure 2 As shown, the above-mentioned gradually rising positive bias circuit includes a DC power supply, capacitors C1, C2, C3, C4, C5, and C6, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency device that are connected together.

[0034] See Figure 2 The positive terminal of the DC power supply is connected in sequence to one end of capacitor C1, one end of capacitor C2, the first port of the voltage regulator chip, one end of capacitor C3, one end of resistor R4, one end of capacitor C5, one end of capacitor C6, the output terminal of the diode, and one end of the mixer. The negative terminal of the DC power supply is connected to one end of resistor R1. The other end of resistor R1 is connected in sequence to the other end of capacitor C1, the other end of capacitor C2, and the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of capacitor C3, one end of capacitor C4, and the source of the field-effect transistor. The gate of the field-effect transistor is connected to the other end of capacitor C4 and the other end of resistor R4. The drain of the field-effect transistor is connected to the other end of capacitor C5 and the fixed terminal of potentiometer R2. The adjusting terminal of potentiometer R2 is connected in sequence to the other end of capacitor C6, the input terminal of the diode, and one end of resistor R3. The other end of resistor R3 and the other end of the mixer are both connected to radio frequency devices.

[0035] Specifically, the gradual rise positive bias circuit can be divided into voltage regulation circuits, gradual rise circuits, and protection circuits; such as Figure 2As shown, the voltage regulator circuit can select the 790X series linear negative voltage regulator chip; the regulator chip automatically adjusts the working state of its internal components through a negative feedback control loop to maintain a constant output voltage and improve the stability of the circuit; this series of chips can stably convert higher negative input voltages (such as -8V to -20V) to -XV output and provide up to 100mA of current to the load.

[0036] like Figure 2 As shown, the core device of the slow-rise circuit, the 2N7000, is an N-channel enhancement-mode MOSFET (metal-oxide-semiconductor field-effect transistor). Its switching characteristics as a voltage-controlled device, when interacting with components such as capacitors in the circuit, can achieve the effect of slowly turning the MOSFET channel on or off, thereby causing the voltage applied to the mixer to rise or fall slowly, thus avoiding damage to the device caused by switching noise.

[0037] like Figure 2 As shown, the circuit protection uses two reverse-connected Zener diodes to ensure that the voltage applied to the mixer and series resistor R3 does not exceed 5V when the circuit fails, while the series resistor can ensure that the bias current does not exceed the damage threshold; the range of the bias voltage value output by the circuit can be selected by adjusting the resistance value of potentiometer R2 in the output section.

[0038] exist Figure 2 In this circuit, the LM79L05 provides a stable -5V voltage output. The 2N7000 MOSFET, together with the 10K resistor R4 and the 2uF capacitor C4, controls the slow rise and fall of the back-end voltage. The Zener diode and the 10K resistor R3 ensure that the bias current is below the overcurrent damage threshold of the mixer when the potentiometer R2 is short-circuited.

[0039] This invention can be extended for applications. For example, the adjustment range of the bias voltage can be determined based on the type and parameter range of the mixer, and appropriate battery and resistor / capacitor values ​​can be selected to achieve this. For positive bias mixers, different Zener diodes and MOSFETs can be selected to implement ramp-up / ramp-down and current-limiting protection functions, as well as bias voltage adjustment functions. Figure 3 As shown, the above-mentioned gradually increasing negative bias circuit includes a DC power supply, capacitors C1, C2, C3, and C4, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency device that are connected together.

[0040] See Figure 3The negative terminal of the aforementioned DC power supply is connected in sequence to the first port of the voltage regulator chip, one end of capacitor C1, one end of resistor R4, one end of capacitor C3, one end of capacitor C4, the input terminal of the diode, and the mixer. The positive terminal of the DC power supply is connected to one end of resistor R1, and the other end of resistor R1 is connected to the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of capacitor C1, one end of capacitor C2, and the source of the field-effect transistor. The gate of the field-effect transistor and the other end of capacitor C2 are both connected to the other end of resistor R4. The drain of the field-effect transistor is connected in sequence to the other end of capacitor C3 and the fixed terminal of potentiometer R2. The adjusting terminal of potentiometer R2 is connected in sequence to the other end of capacitor C4, the output terminal of the diode, and one end of resistor R3. The other end of resistor R3 and the other end of the mixer are both connected to the radio frequency device.

[0041] exist Figure 3 In the middle, the 2936 provides a stable 5V voltage output. The ZVP3306 field-effect transistor, together with the 10K resistor R4 and the 1uF capacitor C2, controls the slow rise and fall of the back-end voltage. The Zener diode and the 10K resistor R3 ensure that the bias current is below the overcurrent damage threshold of the mixer when the potentiometer R2 is short-circuited.

[0042] The circuit described above provides the mixer with ramp-up, ramp-down, and current-limiting protection functions, while also providing adjustable bias voltage to optimize the mixer's operating point. The circuit parameters are given in the figure, and the principle of parameter selection and calculation is illustrated with an example. The circuit design has been proven effective and reliable in practice. Furthermore, this circuit can be used in any scenario where slow voltage changes need to be controlled.

[0043] Specifically, in the far-infrared laser coherent scattering diagnostic system of the tokamak device, a 0.7THz Schottky diode mixer is mainly used for laser signal detection. According to the mixer's IV curve, its optimal operating point is around -0.7V. Bias circuit components were selected to meet this bias voltage adjustment requirement. In the voltage regulator circuit, the shunt resistor value was selected based on the voltage values ​​of the selected battery and the voltage regulator chip. The capacitor connected in parallel with the 2N700 and the resistor connected in series determine the circuit's rise time. After debugging, the parameters shown in the figure were obtained. When an external 5V voltage is supplied through the switch, the voltage response time on the device is approximately 1ms, and the fall time is approximately 2ms, effectively protecting the device. The reverse-connected Zener diode clamps the voltage at 5V, effectively protecting the device from high-voltage damage. The maximum resistance of the output resistor is 500K ohms, corresponding to a bias voltage adjustment range of -0.5-0.8V, meeting the usage requirements. The circuit performs stably and reliably in overall use.

[0044] In summary, the slow-rise bias circuit provided in this embodiment offers an adjustable bias voltage for the mixer, ensuring that the mixer operates near its optimal operating point in applications. Simultaneously, this circuit features slow-rise, slow-fall, and current-limiting protection functions, resolving the feasibility issue of the mixer in practical system integration. The rise time of the slow-rise bias circuit is 1ms in practical use, and the fall time is 2ms, with no switching spike pulses, effectively protecting the mixer. Furthermore, by adjusting the potentiometer, the mixer operates in a more ideal state, and the optimal operating point of the mixer shows high consistency with the tested IV characteristic curve, optimizing the signal-to-noise ratio of the probe signal.

[0045] Example 2: This application provides a mixer's gradual rise bias circuit design system, applied to the mixer's gradual rise bias circuit design method in Example 1, including: Curve acquisition module, used to acquire the current-voltage characteristic curve of the mixer; The target voltage determination module is used to determine the voltage value at the point of maximum curvature in the current-voltage characteristic curve as the target voltage. The circuit setting module is used to set the gradually increasing bias circuit based on the target voltage. The output voltage of the gradually increasing bias circuit is within a preset range that includes the target voltage.

[0046] Furthermore, the aforementioned gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

[0047] The aforementioned gradually increasing positive bias circuit includes a DC power supply, capacitors C1, C2, C3, C4, C5, and C6, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, Zener diode, MOSFET, and radio frequency devices that are connected in the circuit. Figure 2 As shown, the positive terminal of the DC power supply is connected in sequence to one end of capacitor C1, one end of capacitor C2, the first port of the voltage regulator chip, one end of capacitor C3, one end of resistor R4, one end of capacitor C5, one end of capacitor C6, the output terminal of the diode, and one end of the mixer. The negative terminal of the DC power supply is connected to one end of resistor R1. The other end of resistor R1 is connected in sequence to the other end of capacitor C1, the other end of capacitor C2, and the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of capacitor C3, one end of capacitor C4, and the source of the field-effect transistor. The gate of the field-effect transistor is connected to the other end of capacitor C4 and the other end of resistor R4. The drain of the field-effect transistor is connected to the other end of capacitor C5 and the fixed terminal of potentiometer R2. The adjusting terminal of potentiometer R2 is connected in sequence to the other end of capacitor C6, the input terminal of the diode, and one end of resistor R3. The other end of resistor R3 and the other end of the mixer are both connected to radio frequency devices.

[0048] The aforementioned gradually increasing negative bias circuit includes a DC power supply, capacitors C1, C2, C3, and C4, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, Zener diode, MOSFET, and radio frequency devices that are interconnected; such as Figure 3 As shown, the negative terminal of the DC power supply is connected in sequence to the first port of the voltage regulator chip, one end of capacitor C1, one end of resistor R4, one end of capacitor C3, one end of capacitor C4, the input terminal of the diode, and the mixer. The positive terminal of the DC power supply is connected to one end of resistor R1, and the other end of resistor R1 is connected to the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of capacitor C1, one end of capacitor C2, and the source of the field-effect transistor. The gate of the field-effect transistor and the other end of capacitor C2 are both connected to the other end of resistor R4. The drain of the field-effect transistor is connected in sequence to the other end of capacitor C3 and the fixed terminal of potentiometer R2. The adjusting terminal of potentiometer R2 is connected in sequence to the other end of capacitor C4, the output terminal of the diode, and one end of resistor R3. The other end of resistor R3 and the other end of the mixer are both connected to radio frequency devices.

[0049] The circuit described above provides the mixer with ramp-up, ramp-down, and current-limiting protection functions, while also providing adjustable bias voltage to optimize the mixer's operating point. The circuit parameters are given in the figure, and the principle of parameter selection and calculation is illustrated with an example. The circuit design has been proven effective and reliable in practice. Furthermore, this circuit can be used in any scenario where slow voltage changes need to be controlled.

[0050] In summary, the gradually increasing bias circuit provided in this embodiment provides an adjustable bias voltage for the mixer, ensuring that the mixer operates near its optimal operating point in applications. Simultaneously, the circuit features gradually increasing, decreasing, and current-limiting protection functions, thus resolving the feasibility issues of integrating the mixer into actual systems.

[0051] Example 3: This application provides an electronic device, including: at least one processor, at least one memory, and a data bus; In this system, the processor and memory communicate with each other via a data bus; the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute a mixer slow-rise bias circuit design method as described in Embodiment 1.

[0052] Example 4: This application provides a non-transitory computer-readable storage medium that stores computer instructions, which cause the computer to execute a mixer slow-rise bias circuit design method according to Example 1.

[0053] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0054] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0055] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0056] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0057] Those skilled in the art will understand that all or part of the steps in the above facts and methods can be implemented by a program instructing related hardware. The program or the program described therein can be stored in a computer-readable storage medium. When the program is executed, it includes the following steps: at this time, the corresponding method steps are introduced. The storage medium can be ROM / RAM, magnetic disk, optical disk, etc.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for designing a gradually rising bias circuit for a mixer, characterized in that, The specific steps include the following: Obtain the current-voltage characteristic curve of the mixer; The voltage value at the point of maximum curvature in the current-voltage characteristic curve is determined as the target voltage. Based on the target voltage, the gradual rise bias circuit is set up, and the output voltage of the gradual rise bias circuit is within a preset range including the target voltage.

2. The method for designing a gradually rising bias circuit for a mixer according to claim 1, characterized in that, The gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

3. The method for designing a mixer's gradual bias circuit according to claim 2, characterized in that, The gradually increasing positive bias circuit includes a DC power supply, capacitors C1, C2, C3, C4, C5, and C6 connected together, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency device.

4. The method for designing a gradually rising bias circuit for a mixer according to claim 2, characterized in that, The gradually increasing negative bias circuit includes a DC power supply, capacitors C1, C2, C3, and C4, resistor R1, potentiometer R2, resistor R3, resistor R4, diode, voltage regulator chip, field-effect transistor, and radio frequency device that are connected together.

5. The method for designing a gradually rising bias circuit for a mixer according to claim 3, characterized in that, The positive terminal of the DC power supply is connected in sequence to one end of capacitor C1, one end of capacitor C2, the first port of the voltage regulator chip, one end of capacitor C3, one end of resistor R4, one end of capacitor C5, one end of capacitor C6, the output terminal of the diode, and one end of the mixer. The negative terminal of the DC power supply is connected to one end of resistor R1. The other end of resistor R1 is connected in sequence to the other end of capacitor C1, the other end of capacitor C2, and the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of capacitor C3, one end of capacitor C4, and the source of the field-effect transistor. The gate of the field-effect transistor is connected to the other end of capacitor C4 and the other end of resistor R4. The drain of the field-effect transistor is connected to the other end of capacitor C5 and the fixed terminal of potentiometer R2. The adjusting terminal of potentiometer R2 is connected in sequence to the other end of capacitor C6, the input terminal of the diode, and one end of resistor R3. The other end of resistor R3 and the other end of the mixer are both connected to radio frequency devices.

6. The method for designing a gradually rising bias circuit for a mixer according to claim 4, characterized in that, The negative terminal of the DC power supply is connected in sequence to the first port of the voltage regulator chip, one end of the capacitor C1, one end of the resistor R4, one end of the capacitor C3, one end of the capacitor C4, the input terminal of the diode, and the mixer. The positive terminal of the DC power supply is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the second port of the voltage regulator chip. The third port of the voltage regulator chip is connected in sequence to the other end of the capacitor C1, one end of the capacitor C2, and the source of the field-effect transistor. The gate of the field-effect transistor and the other end of the capacitor C2 are both connected to the other end of the resistor R4. The drain of the field-effect transistor is connected in sequence to the other end of the capacitor C3 and the fixed terminal of the potentiometer R2. The adjusting terminal of the potentiometer R2 is connected in sequence to the other end of the capacitor C4, the output terminal of the diode, and one end of the resistor R3. The other end of the resistor R3 and the other end of the mixer are both connected to radio frequency devices.

7. A design system for a mixer's gradual rise bias circuit, characterized in that, include: A curve acquisition module is used to acquire the current-voltage characteristic curve of the mixer. A target voltage determination module is used to determine the voltage value at the point of maximum curvature in the current-voltage characteristic curve as the target voltage. The circuit setting module is used to set up a gradually increasing bias circuit based on the target voltage, wherein the output voltage of the gradually increasing bias circuit is within a preset range including the target voltage.

8. The mixer's gradual rise bias circuit design system according to claim 7, characterized in that, The gradual bias circuit includes a gradual positive bias circuit and a gradual negative bias circuit.

9. An electronic device, characterized in that, include: At least one processor, at least one memory, and a data bus; The processor and the memory communicate with each other via the data bus. The memory stores program instructions that can be executed by the processor, which calls the program instructions to execute a mixer slack bias circuit design method as described in any one of claims 1-6.

10. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions that cause the computer to execute a mixer slack-up bias circuit design method according to any one of claims 1-6.

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