Wide voltage control working circuit and power amplifier

Abstract

The utility model relates to the field of microwave communication, in particular to a wide voltage control working circuit and a power amplifier. The circuit comprises a comparator circuit and a gate circuit. Wherein the comparator circuit is used for comparing an enabling voltage with a preset voltage, when the enabling voltage is larger than the preset voltage, the comparator outputs a high level, and when the enabling voltage is smaller than the preset voltage, the comparator outputs a low level; the gate circuit is used for converting working logic into electric signals. According to the utility model, the requirements of users are effectively met, the control of circuit power supply is optimized, the circuit structure and the spatial layout are simplified, the circuit arrangement is simpler and more convenient, and the cost is also controlled.

Description

Technical Field

[0001] This utility model relates to the field of microwave communication, specifically to a wide voltage control circuit and a power amplifier. Background Technology

[0002] With the rapid development of microwave electronics technology, power amplifiers have been widely used in fields such as communications, radar, and electronic warfare. As a key component in signal transmission links, the performance of power amplifiers directly affects signal transmission quality and the overall system efficiency. In practical applications, power amplifiers need to adapt to different ranges of enable control voltages according to different operating scenarios and equipment requirements. However, traditional power amplifier circuit designs often have certain limitations and are difficult to meet the control requirements of a wide range of enable voltages.

[0003] In existing technologies, the enable control voltage of power amplifiers is typically limited to a narrow range, such as supporting only a single voltage value like 3.3V or 5V. This design is inflexible when facing the diverse enable voltage requirements of different devices or systems. For example, in some complex applications, devices may need to control the power amplifier's on and off states across a wide voltage range from 3.3V to 28V. However, traditional circuit designs cannot directly meet this requirement, necessitating additional voltage conversion circuits or complex control logic to adapt to different enable voltages in practical applications. This not only increases circuit complexity and cost but may also introduce additional signal interference and reliability issues.

[0004] Furthermore, traditional power amplifier circuits often lack sufficient voltage withstand capability and protection mechanisms when faced with high-voltage inputs. If the input voltage exceeds its design range, it may damage the circuit and affect the normal operation of the equipment. This strict limitation on the input voltage range restricts the application of power amplifiers in various complex environments, especially in applications requiring high voltage adaptability, such as in-vehicle communication equipment and industrial automation control systems.

[0005] To address the aforementioned issues, some relevant research has been conducted in the prior art. For example, utility model patent CN205142141U discloses a standing wave protection device for an RF microwave power amplifier. This device achieves protection for the power amplifier through the coordinated operation of a reverse power coupling circuit, a wideband detector voltage equalization circuit, a detector voltage amplification circuit, a control voltage generation circuit, a power control circuit, and the power amplifier. However, this technology primarily focuses on standing wave protection rather than wide-range voltage control, and its control circuit design is relatively complex, making it unsuitable for direct application to wide-range enable voltage control requirements.

[0006] To address the above problems, this utility model proposes a wide voltage control circuit and a power amplifier. Utility Model Content

[0007] The purpose of this invention is to provide a wide voltage control circuit and power amplifier, so that the power amplifier can be controlled to operate and shut down within the range of 3.3V to 28V.

[0008] To achieve the above objectives, the following technical solution is adopted.

[0009] A wide-voltage control circuit includes a comparator circuit and a gate circuit; wherein,

[0010] The comparator circuit is used to compare the enable voltage with the preset voltage. When the enable voltage is greater than the preset voltage, the comparator outputs a high level; when the enable voltage is less than the preset voltage, the comparator outputs a low level.

[0011] The gate circuit is used to convert the working logic into electrical signals.

[0012] Optionally, the comparator is a wide voltage comparator.

[0013] Optionally, the comparator circuit is a high-voltage comparator circuit, which can meet a maximum voltage of 36V.

[0014] Optionally, the comparator circuit includes a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1; wherein,

[0015] The first terminal of the comparator is connected to one end of the third resistor R3, one end of the fourth resistor R4, and one end of the fifth resistor R5; the second terminal of the comparator is connected to one end of the seventh resistor R7 and one end of the sixth resistor R6; the third terminal of the comparator is connected to one end of the first resistor R1, one end of the second resistor R2, and the other end of the third resistor R3; the fourth terminal of the comparator is connected to ground; the eighth terminal of the comparator is connected to one end of the first capacitor C1; the other end of the first resistor R1 is connected to the enable voltage; the other end of the second resistor R2 is connected to ground; the other end of the fourth resistor R4 is connected to the gate circuit; the other end of the sixth resistor R6 is connected to the other end of the fifth resistor R5; the other end of the seventh resistor R7 is connected to ground; and the other end of the first capacitor C1 is connected to ground.

[0016] Optionally, the gate circuit includes AND gates and NOT gates.

[0017] A power amplifier with wide voltage control operation includes a wide voltage control operation circuit and a radio frequency circuit.

[0018] Optionally, the radio frequency circuit includes: an attenuator, a first monolithic amplifier, a second monolithic amplifier, and a GaN power transistor connected in sequence.

[0019] Optionally, the attenuator is a fixed attenuator.

[0020] Optionally, it also includes: an isolator, the input of which is connected to the output of the GaN power transistor, and the output of which isolator is used to output radio frequency signals.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention provides a wide-voltage control circuit that, through the design of comparator and gate circuits, achieves flexible control of the enable voltage within the range of 3.3V to 28V. The comparator circuit compares the enable voltage with a preset voltage and outputs a corresponding high-level or low-level signal based on the comparison result, thereby controlling the on / off state of subsequent circuits. This effectively solves the shortcomings of traditional power amplifier circuits in wide-range enable voltage control, optimizes the circuit's power supply control method, and enables the power amplifier to better adapt to the diverse enable voltage requirements of different devices and systems, improving the circuit's versatility and flexibility. Furthermore, this invention further optimizes the circuit's performance and reliability. This invention specifies the type of comparator, employing both wide-voltage and high-voltage comparator circuits. This not only ensures stable operation of the circuit within a wide voltage range but also improves the circuit's withstand voltage capability, enabling it to withstand voltages up to 36V, thereby enhancing the circuit's reliability and anti-interference ability. This invention describes the specific structure of the comparator circuit in detail. By rationally configuring components such as resistors and capacitors, it achieves accurate comparison and signal processing of the enable voltage, further improving the circuit's control accuracy and stability. This invention defines the composition of the gate circuits, employing a combination of AND and NOT gates to convert operating logic into electrical signals, enabling complex control logic for subsequent circuits and supporting diverse circuit functions. This invention applies the aforementioned wide-voltage control circuit to a power amplifier and describes the composition and optimization of the RF circuit, such as the use of fixed attenuators and isolators, further improving the performance and reliability of the power amplifier. This allows it to operate stably and efficiently under wide voltage control, meeting the high-performance requirements of power amplifiers in modern microwave communication. Attached Figure Description

[0023] Figure 1 This is a schematic block diagram of the wide voltage control circuit of this utility model;

[0024] Figure 2 This is a schematic diagram of the comparator circuit in another embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the power amplifier operating under wide voltage control in this utility model embodiment. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention.

[0028] This utility model relates to a wide-voltage control circuit and a power amplifier, aiming to achieve wide-voltage enable control of the power amplifier through optimized circuit design, while improving the reliability and performance of the circuit. The technical solution of this utility model is described in detail below with reference to specific embodiments.

[0029] Example of a wide voltage control circuit

[0030] like Figure 1 As shown, the wide voltage control circuit of this invention mainly includes a comparator circuit and a gate circuit. The comparator circuit is used to compare the enable voltage with the preset voltage and output a high-level or low-level signal according to the comparison result; the gate circuit converts the working logic into electrical signals to control the working state of subsequent circuits.

[0031] In practical implementation, the core component of the comparator circuit is the comparator itself, which receives and compares an enable voltage and a preset voltage. When the enable voltage is higher than the preset voltage, the comparator outputs a high level; when the enable voltage is lower than the preset voltage, the comparator outputs a low level. This design allows the circuit to operate over a wide range of enable voltages, such as 3.3V to 28V, thus meeting the enable voltage requirements of different application scenarios.

[0032] like Figure 2As shown, to achieve the above functions, the comparator circuit also includes multiple resistors and capacitors to adjust the comparator's operating state and stability. Specifically, the first terminal of the comparator is connected to multiple resistors to set the input voltage range; the second terminal is connected to other resistors to set the preset voltage; the third terminal receives the enable voltage; the fourth terminal is grounded to provide a stable reference level; and the eighth terminal is connected to a capacitor for filtering and stabilizing the output signal. By properly configuring the parameters of these resistors and capacitors, the comparator's performance can be optimized, ensuring stable operation over a wide voltage range.

[0033] Gate circuits further process the comparator output signal, converting it into an electrical signal suitable for subsequent circuitry. Gate circuits can include logic gates such as AND gates and NOT gates. Combinations of these logic gates can implement complex control logic, such as precise control of the power amplifier's on / off state. Furthermore, gate circuits can integrate other protection functions, such as negative voltage protection and temperature protection, to improve the circuit's reliability and safety.

[0034] In practical applications, the selection of a wide-voltage comparator is crucial. The comparator needs to have a wide input voltage range and high-precision comparison capability to ensure accurate output of high or low level signals under different enable voltages. For example, a wide-voltage comparator with an input range of 3.3V to 28V can be selected to meet the circuit's wide voltage control requirements.

[0035] Furthermore, the high-voltage withstand design of the comparator circuit is another important feature of this invention. By employing a high-voltage withstand comparator circuit, the circuit can withstand voltages up to 36V, thus ensuring stable operation even in high-voltage environments and preventing circuit damage due to excessive voltage. This high-voltage withstand design provides additional protection for the circuit, enabling it to operate safely over a wider voltage range.

[0036] In the specific structure of a comparator circuit, the connection method and parameter selection of multiple resistors and capacitors directly affect the circuit performance. For example, by adjusting the resistance values ​​of the first resistor R1 and the second resistor R2, the input characteristics of the enable voltage can be changed; by adjusting the resistance values ​​of the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7, the magnitude of the preset voltage and the sensitivity of the comparator can be set; by adjusting the capacitance value of the first capacitor C1, the filtering effect and stability of the signal can be optimized. The proper configuration of these parameters enables the comparator circuit to achieve accurate voltage comparison and stable signal output over a wide voltage range.

[0037] Examples of power amplifiers with wide voltage control operation

[0038] like Figure 3As shown, the power amplifier with wide voltage control operation of this invention includes the aforementioned wide voltage control circuit and an RF circuit. The RF circuit amplifies the input RF signal to meet the output power requirements of the power amplifier. By combining the wide voltage control circuit with the RF circuit, the power amplifier can operate stably under a wide range of enable voltages while ensuring efficient amplification of the RF signal.

[0039] The implementation of an RF circuit involves several key components, such as attenuators, monolithic amplifiers, and GaN power transistors. Attenuators control the amplitude of the input RF signal to ensure it is not distorted during subsequent amplification. Monolithic amplifiers provide initial amplification of the RF signal, increasing its power level. GaN power transistors, as the core amplification element of the RF circuit, enable high-power output, meeting the performance requirements of the power amplifier.

[0040] In practical implementation, fixed attenuators can be used in RF circuits. Fixed attenuators have the advantages of high stability and low cost, and can provide a stable attenuation for RF signals, thereby optimizing the signal input characteristics. By properly selecting the attenuation of the attenuator, it can be ensured that the RF signal is at an appropriate power level before entering the monolithic amplifier, avoiding amplifier saturation distortion caused by excessive signal strength.

[0041] Monolithic amplifiers play a crucial amplification role in radio frequency (RF) circuits. By employing a multi-stage monolithic amplifier design, the power level of the RF signal can be progressively increased to meet the output requirements of a power amplifier. For example, an RF circuit may include a first monolithic amplifier and a second monolithic amplifier, which respectively perform preliminary amplification and further amplification of the RF signal. This multi-stage amplification design can effectively improve the signal power gain while ensuring signal quality and stability.

[0042] GaN power transistors, as the final amplification element in radio frequency circuits, possess high power output capability and excellent high-frequency characteristics. By properly designing the drive circuit and heat dissipation system of GaN power transistors, their stability and reliability at high power output can be ensured. The output signal of GaN power transistors can be further processed through isolators to improve signal quality and stability.

[0043] The application of isolators in radio frequency (RF) circuits is also a key feature of this invention. The input terminal of the isolator is connected to the output terminal of the GaN power transistor, and its output terminal is used to output RF signals. The isolator's function is to isolate reflected power, preventing damage to the power transistor, and simultaneously reducing the impact of harmonics on the power amplifier. By adding an isolator to the RF circuit, the performance and reliability of the power amplifier can be effectively improved, ensuring stable operation in complex working environments.

[0044] In practical applications, the performance of a power amplifier depends not only on the design of the RF circuit but also closely on the performance of its wide-voltage control circuitry. By optimizing the design of this circuitry, the power amplifier can achieve stable turn-on and turn-off control across a wide range of enable voltages. For example, when the enable voltage varies from 3.3V to 28V, the comparator circuit can accurately output high or low level signals, which, after further processing by gate circuits, control the operating state of the RF circuit. This wide-voltage control capability allows the power amplifier to adapt to different equipment and system requirements, improving its versatility and flexibility.

[0045] Furthermore, the reliability of the power amplifier has been significantly improved. By employing high-voltage-resistant comparator circuits and gate circuits with protective functions, the power amplifier can operate stably in high-voltage environments while avoiding circuit damage caused by excessive voltage or negative voltage. This highly reliable design provides strong support for the application of the power amplifier in complex environments.

[0046] In summary, this invention achieves stable operation of the power amplifier across a wide range of enable voltages by optimizing the design of the wide-voltage control circuit and the radio frequency circuit, while simultaneously improving circuit performance and reliability. Through the rational configuration of resistor and capacitor parameters in the comparator circuit, and the optimization of components such as attenuators, monolithic amplifiers, and GaN power transistors in the radio frequency circuit, the power amplifier can operate efficiently in various operating scenarios, meeting the high-performance requirements of modern microwave communication.

[0047] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A wide voltage control operation circuit, characterized by, This includes comparator circuits and gate circuits; among which, The comparator circuit is used to compare the enable voltage with the preset voltage. When the enable voltage is greater than the preset voltage, the comparator outputs a high level; when the enable voltage is less than the preset voltage, the comparator outputs a low level. The gate circuit is used to convert the working logic into electrical signals; The comparator circuit includes a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1; wherein, The first terminal of the comparator is connected to one end of the third resistor R3, one end of the fourth resistor R4, and one end of the fifth resistor R5; the second terminal of the comparator is connected to one end of the seventh resistor R7 and one end of the sixth resistor R6; the third terminal of the comparator is connected to one end of the first resistor R1, one end of the second resistor R2, and the other end of the third resistor R3; the fourth terminal of the comparator is connected to ground; the eighth terminal of the comparator is connected to one end of the first capacitor C1; the other end of the first resistor R1 is connected to the enable voltage; the other end of the second resistor R2 is connected to ground; the other end of the fourth resistor R4 is connected to the gate circuit; the other end of the sixth resistor R6 is connected to the other end of the fifth resistor R5; the other end of the seventh resistor R7 is connected to ground; and the other end of the first capacitor C1 is connected to ground.

2. A wide voltage control operation circuit according to claim 1, wherein The comparator is a wide voltage comparator.

3. The wide voltage control circuit according to claim 1, characterized in that, The comparator circuit is a high-voltage comparator circuit, capable of handling a maximum voltage of 36V.

4. A wide voltage control operation circuit according to claim 1, wherein The gate circuits mentioned include AND gates and NOT gates.

5. A power amplifier operating over a wide voltage control range, characterized by include: The wide voltage control circuit and radio frequency circuit as described in any one of claims 1-4.

6. A wide voltage control operation power amplifier according to claim 5, wherein, The radio frequency circuit includes: an attenuator, a first monolithic amplifier, a second monolithic amplifier, and a GaN power transistor connected in sequence.

7. A power amplifier with wide voltage control operation according to claim 6, characterized in that, The attenuator is a fixed attenuator.

8. A wide voltage control operation power amplifier according to claim 6, characterized in that, Also includes: An isolator, the input of which is connected to the output of the GaN power transistor, and the output of which is used to output radio frequency signals.

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