Full-temperature gain automatic compensation circuit of amplifier

Abstract

The utility model discloses an amplifier full-temperature gain automatic compensation circuit, the output end of an adjustable stabilized voltage supply is electrically connected with a voltage dividing assembly, a first filter capacitor C1 and a second filter capacitor C2 through a circuit, the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel, and one end of each of the first filter capacitor C1 and the second filter capacitor C2 is grounded; the output end of the voltage dividing assembly is electrically connected with the thermistor R4 and the adjusting assembly. The output end of the adjusting assembly is grounded. The output end of the voltage dividing assembly is further connected with the positive electrode of the amplifier U1 through a voltage stabilizing capacitor C3, the output end of the voltage stabilizing capacitor C3 is connected with the ground, and the output end of the amplifier U1 is communicated with external grid power supply voltage Vgg through an RC filtering assembly. According to the utility model, the gain of the amplifier U1 is controlled and stable in a full-temperature interval, the manufacturing cost is saved, the reliability of the system is improved, and the uncontrollable risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to satellite communication technical field especially relates to a kind of amplifier full-temperature gain automatic compensation circuit. BACKGROUND

[0002] With the application of millimeter wave communication technology in satellite communication, satellite communication technology has been developing rapidly. Human beings are increasingly saturated in the use of spectrum resources in satellite communication. As a core device in satellite communication, millimeter wave power amplifier has a great influence on the quality and efficiency of the overall communication system. In the millimeter wave satellite communication system, the modulated signal needs to be linearly amplified to accurately demodulate the signal. Any amplitude or phase distortion of the modulated signal can increase the bit error rate. At the same time, with the application of new modulation technology, the linearity of the system is increasingly required, and the linearity of the system is mainly affected by the last millimeter wave high-power amplifier.

[0003] However, one of the difficulties of satellite communication is the harsh environment in outer space, and the temperature difference of the working environment is large. The gain of the power amplifier changes greatly with temperature, and adding a temperature control board will significantly increase the satellite load weight, affect the overall design of the satellite, and increase the manufacturing cost.

[0004] Therefore, it is urgent to set up a small and flexible automatic compensation circuit to realize the full-temperature link gain control of the amplifier, reduce the module size and cost, and increase the space reliability. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an amplifier full-temperature gain automatic compensation circuit, which effectively solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0007] An amplifier full-temperature gain automatic compensation circuit, characterized by: including adjustable stabilized power supply, voltage divider assembly, first filter capacitor, second filter capacitor, thermistor, adjustment assembly, voltage stabilizing capacitor, amplifier and RC filter assembly, the output end of the adjustable stabilized power supply is respectively connected with voltage divider assembly, first filter capacitor and second filter capacitor through circuit, the first filter capacitor and the second filter capacitor are connected in parallel and one end is respectively grounded; the output end of the voltage divider assembly is respectively connected with thermistor and adjustment assembly, the output end of the adjustment assembly is grounded; the output end of the voltage divider assembly is also connected with the positive electrode of the amplifier through the voltage stabilizing capacitor, the output end of the voltage stabilizing capacitor is grounded, and the output end of the amplifier is connected with the external gate power supply voltage through the RC filter assembly.

[0008] Preferably, the RC filtering assembly comprises a filtering resistor and a third filtering capacitor, the output end of the amplifier is electrically connected with the input end of the filtering resistor, the output end of the filtering resistor is communicated with the external gate power voltage through the third filtering capacitor, and the output end of the third filtering capacitor is grounded.

[0009] Preferably, the voltage dividing assembly comprises a first voltage dividing resistor and a second voltage dividing resistor, the output end of the adjustable voltage stabilizing power supply is electrically connected with the input end of the first voltage dividing resistor, the output end of the first voltage dividing resistor is electrically connected with the input end of the second voltage dividing resistor, and the input end of the voltage stabilizing capacitor is connected to the circuit between the first voltage dividing resistor and the second voltage dividing resistor; and the output end of the second voltage dividing resistor is electrically connected with the thermistor and the adjusting assembly respectively.

[0010] Preferably, the adjusting assembly comprises a first adjusting resistor and a second adjusting resistor, the output end of the second voltage dividing resistor is communicated with the input end of the first adjusting resistor, the first adjusting resistor is connected with the thermistor and the second adjusting resistor in parallel across the first adjusting resistor, and the output end of the second adjusting resistor is grounded.

[0011] Preferably, the voltage dividing assembly comprises a first voltage dividing resistor, the output end of the adjustable voltage stabilizing power supply is electrically connected with the input end of the first voltage dividing resistor, and the output end of the first voltage dividing resistor is electrically connected with the input end of the voltage stabilizing capacitor, the thermistor and the adjusting assembly respectively.

[0012] Preferably, the adjusting assembly comprises a first adjusting resistor and a second adjusting resistor, the output end of the first voltage dividing resistor is communicated with the input end of the first adjusting resistor, the first adjusting resistor is connected with the thermistor and the second adjusting resistor in parallel across the first adjusting resistor, and the output end of the second adjusting resistor is grounded.

[0013] Preferably, the voltage dividing assembly comprises a first voltage dividing resistor and a second voltage dividing resistor, the output end of the adjustable voltage stabilizing power supply is electrically connected with the input end of the first voltage dividing resistor, the output end of the first voltage dividing resistor is electrically connected with the input end of the second voltage dividing resistor, and the output end of the second voltage dividing resistor is electrically connected with the adjusting assembly and the voltage stabilizing capacitor respectively.

[0014] Preferably, the adjusting assembly comprises a first adjusting resistor and a second adjusting resistor, the thermistor is connected with the second adjusting resistor in series, the output end of the second adjusting resistor and the second voltage dividing resistor is connected with the first adjusting resistor in parallel, and the output end of the first adjusting resistor is grounded.

[0015] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0016] (1) The output end of the adjustable voltage stabilizing power supply is electrically connected with the voltage dividing assembly, the first filter capacitor C1 and the second filter capacitor C2 through a circuit, the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel and one end is grounded respectively; the output end of the voltage dividing assembly is electrically connected with the thermistor R4 and the adjusting assembly respectively, the output end of the adjusting assembly is grounded; the output end of the voltage dividing assembly is also connected with the positive electrode of the amplifier U1 through the voltage stabilizing capacitor C3, the output end of the voltage stabilizing capacitor C3 is grounded, and the output end of the amplifier U1 is communicated with the external gate power supply voltage Vgg through the RC filter assembly. The temperature characteristic curve of the thermistor R4 is combined with the external gate power supply voltage Vgg and the gain characteristic of the amplifier U1, the first adjusting resistor R3 and the second adjusting resistor R5 can simulate the curve of the gate voltage changing with temperature, and then the gain characteristic of the amplifier U1 under different gate voltages can be directly reflected on the gain control of the amplifier U1. Since the gain curves of different amplifiers U1 for different gate voltages are different, the resistance values of the first adjusting resistor R3 and the second adjusting resistor R5 can be calculated and adjusted, so that the gain of the amplifier U1 is controlled and stable in the full temperature range, the manufacturing cost is saved, the system reliability is improved, and the uncontrollable risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the circuit diagram of the embodiment 1 of the utility model;

[0018] Figure 2 It is the circuit diagram of the embodiment 2 of the utility model;

[0019] Figure 3 It is the circuit diagram of the embodiment 3 of the utility model;

[0020] Figure 4 It is the circuit diagram of the embodiment 3 of the utility model; Figures 1 to 3 The measured result schematic diagram of the gain curve in the full temperature range after using the circuit. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two;The terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. Indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Embodiment 1

[0025] As shown in Figure 1 The output end of the adjustable voltage stabilizing power supply is electrically connected with the voltage dividing assembly, the first filter capacitor C1 and the second filter capacitor C2 through a circuit respectively, the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel and one end is grounded respectively;The output end of the voltage dividing assembly is electrically connected with the thermistor R4 and the adjusting assembly respectively, the output end of the adjusting assembly is grounded;The output end of the voltage dividing assembly is also connected with the positive electrode of the amplifier U1 through the voltage stabilizing capacitor C3, the output end of the voltage stabilizing capacitor C3 is grounded, and the output end of the amplifier U1 is communicated with the external gate power supply voltage Vgg through the RC filter assembly.

[0026] The RC filter assembly comprises a filter resistor R6 and a third filter capacitor C4, the output end of the amplifier U1 is electrically connected with the input end of the filter resistor R6, the output end of the filter resistor R6 is communicated with the external gate power supply voltage Vgg through the third filter capacitor C4, and the output end of the third filter capacitor C4 is grounded.

[0027] The voltage dividing assembly comprises a first voltage dividing resistor R1 and a second voltage dividing resistor R2, the output end of the adjustable voltage stabilizing power supply is electrically connected with the input end of the first voltage dividing resistor R1, the output end of the first voltage dividing resistor R1 is electrically connected with the input end of the second voltage dividing resistor R2, and the input end of the voltage stabilizing capacitor C3 is connected in the circuit between the first voltage dividing resistor R1 and the second voltage dividing resistor R2;The output end of the second voltage dividing resistor R2 is electrically connected with the thermistor R4 and the adjusting assembly respectively.

[0028] The regulating component includes a first regulating resistor R3 and a second regulating resistor R5. The output terminal of the second voltage divider resistor R2 is connected to the input terminal of the first regulating resistor R3. A thermistor R4 and the second regulating resistor R5 are connected in parallel across the first regulating resistor R3. The output terminal of the second regulating resistor R5 is grounded.

[0029] In this embodiment, the first voltage divider resistor R1, the second voltage divider resistor R2, the first regulating resistor R3, and the second regulating resistor R5 are all chip thin-film resistors. The first filter capacitor C1 and the second filter capacitor C2 filter and decouple the adjustable regulated power supply. The first regulating resistor R3 and the second regulating resistor R5 are used to adjust the temperature slope, and the voltage regulator capacitor C3 is used to regulate the voltage after voltage division. After the voltage is divided, the amplifier U1 is used for voltage regulation and follow-up output, and then the RC filter component composed of the filter resistor R6 and the third filter capacitor C4 is used for filtering to obtain the external gate power supply voltage Vgg of the amplifier U1.

[0030] Example 2

[0031] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the voltage divider component includes a first voltage divider resistor R1, the output terminal of the adjustable regulated power supply is electrically connected to the input terminal of the first voltage divider resistor R1, and the output terminal of the first voltage divider resistor R1 is electrically connected to the regulated capacitor C3, the thermistor R4 and the input terminal of the adjustment component, respectively.

[0032] The regulating component includes a first regulating resistor R3 and a second regulating resistor R5. The output terminal of the first voltage divider resistor R1 is connected to the input terminal of the first regulating resistor R3. A thermistor R4 and the second regulating resistor R5 are connected in parallel across the first regulating resistor R3. The output terminal of the second regulating resistor R5 is grounded.

[0033] Example 3

[0034] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the voltage divider assembly includes a first voltage divider resistor R1 and a second voltage divider resistor R2. The output terminal of the adjustable regulated power supply is electrically connected to the input terminal of the first voltage divider resistor R1, the output terminal of the first voltage divider resistor R1 is electrically connected to the input terminal of the second voltage divider resistor R2, and the output terminal of the second voltage divider resistor R2 is electrically connected to the adjustment assembly and the regulated capacitor C3, respectively.

[0035] The regulating component includes a first regulating resistor R3 and a second regulating resistor R5. A thermistor R4 is connected in series with the second regulating resistor R5. The output terminals of the second regulating resistor R5 and the second voltage divider resistor R2 are connected in parallel with the first regulating resistor R3. The output terminal of the first regulating resistor R3 is grounded.

[0036] As shown in Examples 1 to 3, the difference is mainly in different circuit connections of the voltage division assembly and the adjusting assembly, but the functions of the respective electronic components are the same, as shown in Figure 4 As shown in Examples 1 to 3, the difference is mainly in different circuit connections of the voltage division assembly and the adjusting assembly, but the functions of the respective electronic components are the same, as shown in Figures 1 to 3 After the amplifier U1 is automatically compensated using the circuit as shown in Figures 1 to 3 , the gain output of the amplifier U1 is stable and almost not affected by external temperature. The utility model adopts the temperature characteristic curve of the thermistor R4, combines the external gate voltage Vgg and the gain characteristic of the amplifier U1, and can simulate the curve of the gate voltage changing with temperature by adjusting the first adjusting resistor R3 and the second adjusting resistor R5. Then, referring to the gain characteristic of the amplifier U1 under different gate voltages, the gain control of the amplifier U1 can be directly reflected. Since the gain curves of different amplifiers U1 for different gate voltages are different, the resistance values of the first adjusting resistor R3 and the second adjusting resistor R5 can be calculated and adjusted, so that the gain of the amplifier U1 is controlled and stable in the whole temperature range. The system reliability is improved, the manufacturing cost is saved, and the uncontrollable risk is reduced.

[0037] The above examples are only preferred embodiments of the utility model, and cannot be used to limit the scope of the utility model. Therefore, the modifications, equivalent changes, improvements, etc. made in the patent range of the utility model still belong to the scope covered by the utility model.

Claims

1. An amplifier full temperature gain automatic compensation circuit, characterized by: The application relates to a voltage regulator, which comprises an adjustable voltage regulator, a voltage divider, a first filter capacitor, a second filter capacitor, a thermistor, an adjusting component, a voltage stabilizing capacitor, an amplifier and an RC filter component, wherein the output end of the adjustable voltage regulator is electrically connected with the voltage divider, the first filter capacitor and the second filter capacitor through a circuit, the first filter capacitor and the second filter capacitor are connected in parallel and one end of each is grounded; the output end of the voltage divider is electrically connected with the thermistor and the adjusting component, the output end of the adjusting component is grounded; the output end of the voltage divider is also connected with the positive electrode of the amplifier through the voltage stabilizing capacitor, the output end of the voltage stabilizing capacitor is grounded, and the output end of the amplifier is connected with an external gate power voltage through the RC filter component.

2. An amplifier gain auto-compensation circuit over temperature according to claim 1, characterized in that: The RC filter component comprises a filter resistor and a third filter capacitor, the output end of the amplifier is electrically connected with the input end of the filter resistor, the output end of the filter resistor is connected with the external gate power voltage through the third filter capacitor, and the output end of the third filter capacitor is grounded.

3. An amplifier gain auto-compensation circuit over temperature according to claim 2, characterized in that: The voltage divider comprises a first voltage divider resistor and a second voltage divider resistor, the output end of the adjustable voltage regulator is electrically connected with the input end of the first voltage divider resistor, the output end of the first voltage divider resistor is electrically connected with the input end of the second voltage divider resistor, and the input end of the voltage stabilizing capacitor is connected with the circuit between the first voltage divider resistor and the second voltage divider resistor; the output end of the second voltage divider resistor is electrically connected with the thermistor and the adjusting component.

4. An amplifier gain auto-compensation circuit over temperature according to claim 3, characterized in that: The adjusting component comprises a first adjusting resistor and a second adjusting resistor, the output end of the second voltage divider resistor is connected with the input end of the first adjusting resistor, the first adjusting resistor is connected in parallel with the thermistor and the second adjusting resistor at two ends, and the output end of the second adjusting resistor is grounded.

5. The amplifier gain self-compensating circuit for full temperature range according to claim 2, characterized in that: The voltage divider comprises a first voltage divider resistor, the output end of the adjustable voltage regulator is electrically connected with the input end of the first voltage divider resistor, and the output end of the first voltage divider resistor is electrically connected with the input end of the voltage stabilizing capacitor, the thermistor and the adjusting component.

6. An amplifier gain auto-compensation circuit over temperature according to claim 5, characterized in that: The adjusting component comprises a first adjusting resistor and a second adjusting resistor, the output end of the first voltage divider resistor is connected with the input end of the first adjusting resistor, the first adjusting resistor is connected in parallel with the thermistor and the second adjusting resistor at two ends, and the output end of the second adjusting resistor is grounded.

7. An amplifier gain auto-compensation circuit over temperature according to claim 2, characterized in that: The voltage divider comprises a first voltage divider resistor and a second voltage divider resistor, the output end of the adjustable voltage regulator is electrically connected with the input end of the first voltage divider resistor, the output end of the first voltage divider resistor is electrically connected with the input end of the second voltage divider resistor, and the output end of the second voltage divider resistor is electrically connected with the adjusting component and the voltage stabilizing capacitor.

8. An amplifier gain auto-compensation circuit over temperature according to claim 7, characterized in that: The adjusting component comprises a first adjusting resistor and a second adjusting resistor, the thermistor and the second adjusting resistor are connected in series, the output end of the second adjusting resistor and the second voltage divider resistor is connected in parallel with the first adjusting resistor, and the output end of the first adjusting resistor is grounded.

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