CN116470867A - Circuit and method for voltage calibration of power amplifier and electronic equipment - Google Patents

Circuit and method for voltage calibration of power amplifier and electronic equipment Download PDF

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Publication number
CN116470867A
CN116470867A CN202310244103.1A CN202310244103A CN116470867A CN 116470867 A CN116470867 A CN 116470867A CN 202310244103 A CN202310244103 A CN 202310244103A CN 116470867 A CN116470867 A CN 116470867A
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CN
China
Prior art keywords
circuit
voltage
power
electrically connected
power amplifying
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CN202310244103.1A
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Chinese (zh)
Inventor
郭映江
李帅
李育强
杨寒冰
黄露
叶茂
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Allwinner Technology Co Ltd
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Allwinner Technology Co Ltd
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Application filed by Allwinner Technology Co Ltd filed Critical Allwinner Technology Co Ltd
Priority to CN202310244103.1A priority Critical patent/CN116470867A/en
Publication of CN116470867A publication Critical patent/CN116470867A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a circuit, a method and electronic equipment for carrying out voltage calibration on a power amplifier, wherein the circuit comprises a voltage calibration circuit and a power amplification circuit, a first end and a second end of the voltage calibration circuit are respectively and electrically connected with a first end and a second end of the power amplification circuit, a third end and a fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct current voltage source, a fifth end of the voltage calibration circuit is grounded, the input current of the power amplification circuit can be controlled through the voltage calibration circuit, so that the power amplification circuit is triggered to calibrate the output voltage of the first end of the power amplification circuit, the output voltage is clamped at high voltage and does not exceed the maximum limit value of the power amplification circuit, and the linearity of the power amplification circuit is ensured, and meanwhile the stability of the power amplification circuit is improved; and closing the voltage calibration circuit when the output voltage of the first end of the power amplification circuit reaches a specified value, thereby being beneficial to saving power.

Description

Circuit and method for voltage calibration of power amplifier and electronic equipment
Technical Field
The present invention relates to the field of voltage calibration technologies, and in particular, to a circuit, a method, and an electronic device for performing voltage calibration on a power amplifier.
Background
CMOS power amplifiers, which perform the function of signal power amplification, are a critical part of wireless radio frequency systems. In the CMOS radio frequency front-end circuit, the linearity of the CMOS power amplifier is improved, so that the communication quality of a communication system can be effectively improved. However, in the conventional linearity improvement method, there are few problems in consideration of stability, which easily results in low manufacturing yield of the CMOS power amplifier.
In real life, among stability problems of the CMOS power amplifier, the drain voltage of the CMOS transistor exceeding the maximum limit is a problem that is often encountered; however, in order to improve the linearity of CMOS power amplifiers, it is desirable to boost the drain voltage as much as possible. Therefore, it is important to provide a technical solution for improving the stability of the CMOS power amplifier while ensuring the linearity of the CMOS power amplifier in the CMOS power amplifier.
Disclosure of Invention
The invention aims to solve the technical problem of providing a circuit, a method and electronic equipment for voltage calibration of a power amplifier, which can improve the stability of the power amplifier circuit while guaranteeing the linearity of the power amplifier circuit, and close the voltage calibration circuit when the output voltage of the first end of the power amplifier circuit reaches a specified value, thereby being beneficial to saving power.
To solve the above technical problem, a first aspect of the present invention discloses a circuit for voltage calibration of a power amplifier, the circuit for voltage calibration of a power amplifier includes a voltage calibration circuit and a power amplification circuit, wherein:
the first end and the second end of the voltage calibration circuit are respectively and electrically connected with the first end and the second end of the power amplification circuit, the third end and the fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct-current voltage source, the fifth end of the voltage calibration circuit is used for grounding, and the third end and the fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating-current voltage source, and the fifth end of the power amplification circuit is used for grounding;
the voltage calibration circuit is used for controlling the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit;
the power amplifying circuit is used for calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit.
As an alternative embodiment, in the first aspect of the present invention, the voltage calibration circuit includes a comparator, a bias current mirror, and a bias resistor;
the non-inverting input end of the comparator is electrically connected with the direct-current voltage source, the inverting input end of the comparator is electrically connected with the first end of the power amplifying circuit, the output end of the comparator is electrically connected with the first end of the bias current mirror, the second end of the bias current mirror is respectively electrically connected with one end of the bias resistor and the second end of the power amplifying circuit, the third end of the bias current mirror is electrically connected with the power supply, and the other end of the bias resistor is grounded;
the comparison P is used for generating a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit; the difference between the direct current voltage output by the direct current voltage source and the maximum output voltage of the first end of the power amplifying circuit is smaller than or equal to a preset value;
the bias current mirror is used for controlling the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator.
As an alternative embodiment, in the first aspect of the present invention, the voltage calibration circuit further includes a digital processing module, a first end of the digital processing module is electrically connected to the output end of the comparator, and a second end of the digital processing module is electrically connected to the first end of the bias current mirror, wherein:
the digital processing module is used for generating a current control signal of the bias current mirror according to the received voltage comparison signal sent by the comparator, wherein the current control signal is used for controlling the output current of the bias current mirror, and the output current of the bias current mirror comprises the input current of the power amplifying circuit and the input current of the bias resistor.
As an alternative embodiment, in the first aspect of the present invention, the digital processing module includes an analog-to-digital converter, a digital-to-analog converter, and a digital processing unit, where a first end of the analog-to-digital converter is electrically connected to an output end of the comparator, a second end of the analog-to-digital converter is electrically connected to a first end of the digital processing unit, a second end of the digital processing unit is electrically connected to a first end of the digital-to-analog converter, and a second end of the digital-to-analog converter is electrically connected to a first end of the bias current mirror, where:
The analog-to-digital converter is used for converting the received voltage comparison signal sent by the comparator into a first digital signal;
the digital processing unit is used for processing the received first digital signal sent by the analog-to-digital converter according to the determined signal parameters to obtain a second digital signal, wherein the signal parameters comprise signal amplitude and signal phase;
the digital-to-analog converter is used for generating a current control signal of the bias current mirror according to the received second digital signal sent by the digital processing unit.
As an optional implementation manner, in the first aspect of the present invention, the power amplifying circuit includes a first power amplifying device and a second power amplifying device;
the first end of the first power amplifying device is used for being electrically connected with the power supply, the second end of the first power amplifying device is electrically connected with the second end of the bias current mirror contained in the voltage calibration circuit, the first end of the second power amplifying device is respectively and electrically connected with the third end of the first power amplifying device and the inverting input end of the comparator contained in the voltage calibration circuit, the second end of the second power amplifying device is used for being electrically connected with the alternating voltage source, and the third end of the second power amplifying device is used for being grounded.
As an alternative embodiment, in the first aspect of the present invention, the power amplifying circuit includes a current replication module, a first power amplifying device and a second power amplifying device, where a first end of the current replication module is electrically connected to the power supply, a second end of a bias current mirror included in the voltage calibration circuit and a second end of the first power amplifying device, the second end of the current replication module is electrically connected to the second end of the bias current mirror, a third end of the current replication module is electrically connected to an inverting input end of a comparator included in the voltage calibration circuit, a fourth end of the current replication module is electrically connected to the ac voltage source, a first end of the first power amplifying device is electrically connected to the power supply, a third end of the first power amplifying device is electrically connected to a first end of the second power amplifying device, a second end of the second power amplifying device is electrically connected to the ac voltage source, and a third end of the second power amplifying device is electrically connected to ground, where:
the current replication module is used for replicating the current of the branch where the first power amplifying device and the second power amplifying device are located, so that the output voltage of the third end of the current replication module is equal to the output voltage of the first end of the power amplifying circuit.
As an optional implementation manner, in the first aspect of the present invention, the current replication module includes a third power amplifying device and a fourth power amplifying device;
the first end of the third power amplifying device is electrically connected with the power supply, the second end of the bias current mirror and the second end of the first power amplifying device respectively, the second end of the third power amplifying device is electrically connected with the second end of the bias current mirror, the first end of the fourth power amplifying device is electrically connected with the third end of the third power amplifying device and the inverting input end of the comparator respectively, the second end of the fourth power amplifying device is used for being electrically connected with the alternating voltage source, and the third end of the fourth power amplifying device is used for being grounded.
The second aspect of the invention discloses a method for voltage calibration of a power amplifier, which is applied to a circuit for voltage calibration of the power amplifier, wherein the circuit for voltage calibration of the power amplifier comprises a voltage calibration circuit and a power amplification circuit, a first end and a second end of the voltage calibration circuit are respectively and electrically connected with the first end and the second end of the power amplification circuit, a third end and a fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct current voltage source, a fifth end of the voltage calibration circuit is used for grounding, and a third end and a fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating current voltage source, and a fifth end of the power amplification circuit is used for grounding; the method comprises the following steps:
The voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit;
the power amplification circuit calibrates the output voltage of the first end of the power amplification circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplification circuit.
As an alternative implementation manner, in the second aspect of the present invention, the voltage calibration circuit includes a comparator, a bias current mirror, and a bias resistor, where a non-inverting input end of the comparator is used to be electrically connected to the dc voltage source, an inverting input end of the comparator is electrically connected to a first end of the power amplifying circuit, an output end of the comparator is electrically connected to a first end of the bias current mirror, a second end of the bias current mirror is respectively electrically connected to one end of the bias resistor and a second end of the power amplifying circuit, a third end of the bias current mirror is used to be electrically connected to the power supply, and another end of the bias resistor is used to be grounded;
the voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit, and the voltage calibration circuit comprises:
The comparator generates a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplifying circuit;
and the bias current mirror controls the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator.
As an alternative embodiment, in the second aspect of the present invention, the voltage calibration circuit further includes a digital processing module, a first end of the digital processing module is electrically connected to the output end of the comparator, and a second end of the digital processing module is electrically connected to the first end of the bias current mirror;
the method further comprises the steps of:
the digital processing module generates a current control signal of the bias current mirror according to the received voltage comparison signal sent by the comparator, wherein the current control signal is used for controlling the output current of the bias current mirror, and the output current of the bias current mirror comprises the input current of the power amplifying circuit and the input current of the bias resistor.
As an alternative embodiment, in the second aspect of the present invention, the digital processing module includes an analog-to-digital converter, a digital-to-analog converter, and a digital processing unit, where a first end of the analog-to-digital converter is electrically connected to an output end of the comparator, a second end of the analog-to-digital converter is electrically connected to a first end of the digital processing unit, a second end of the digital processing unit is electrically connected to a first end of the digital-to-analog converter, and a second end of the digital-to-analog converter is electrically connected to a first end of the bias current mirror;
The digital processing module generates a current control signal of the bias current mirror according to the received voltage comparison signal sent by the comparator, and the current control signal comprises the following components:
the analog-to-digital converter converts the received voltage comparison signal sent by the comparator into a first digital signal;
the digital processing unit processes the received first digital signal sent by the analog-to-digital converter according to the determined signal parameters to obtain a second digital signal, wherein the signal parameters comprise signal amplitude and signal phase;
the digital-to-analog converter generates a current control signal of the bias current mirror according to the received second digital signal sent by the digital processing unit.
As an alternative embodiment, in the second aspect of the present invention, the power amplifying circuit includes a first power amplifying device and a second power amplifying device;
the first end of the first power amplifying device is used for being electrically connected with the power supply, the second end of the first power amplifying device is electrically connected with the second end of the bias current mirror contained in the voltage calibration circuit, the first end of the second power amplifying device is respectively and electrically connected with the third end of the first power amplifying device and the inverting input end of the comparator contained in the voltage calibration circuit, the second end of the second power amplifying device is used for being electrically connected with the alternating voltage source, and the third end of the second power amplifying device is used for being grounded.
As an alternative embodiment, in a second aspect of the present invention, the power amplifying circuit includes a current replication module, a first power amplifying device and a second power amplifying device, where a first end of the current replication module is electrically connected to the power supply, a second end of a bias current mirror included in the voltage calibration circuit and a second end of the first power amplifying device, the second end of the current replication module is electrically connected to the second end of the bias current mirror, a third end of the current replication module is electrically connected to an inverting input end of a comparator included in the voltage calibration circuit, a fourth end of the current replication module is electrically connected to the ac voltage source, a first end of the first power amplifying device is electrically connected to the power supply, a third end of the first power amplifying device is electrically connected to the first end of the second power amplifying device, a second end of the second power amplifying device is electrically connected to the ac voltage source, and a third end of the second power amplifying device is electrically connected to ground;
the power amplifying circuit calibrates the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit, and comprises:
The current replication module replicates the current of the branch circuit where the first power amplifying device and the second power amplifying device are located, so that the output voltage of the third end of the current replication module is equal to the output voltage of the first end of the power amplifying circuit;
and the power amplification circuit calibrates the output voltage of the first end of the power amplification circuit according to the received alternating voltage output by the alternating voltage source, the current copied by the current copying module and the current of the branch circuit where the first power amplification device and the second power amplification device are positioned.
As an optional implementation manner, in the second aspect of the present invention, the current replication module includes a third power amplifying device and a fourth power amplifying device;
the first end of the third power amplifying device is electrically connected with the power supply, the second end of the bias current mirror and the second end of the first power amplifying device respectively, the second end of the third power amplifying device is electrically connected with the second end of the bias current mirror, the first end of the fourth power amplifying device is electrically connected with the third end of the third power amplifying device and the inverting input end of the comparator respectively, the second end of the fourth power amplifying device is used for being electrically connected with the alternating voltage source, and the third end of the fourth power amplifying device is used for being grounded.
The third aspect of the invention discloses an electronic device, which comprises a shell, and the electronic device further comprises the circuit for voltage calibration of the power amplifier disclosed in the first aspect of the invention, wherein the shell is used for placing the circuit for voltage calibration of the power amplifier.
The implementation of the invention has the following beneficial effects:
the invention provides a circuit for carrying out voltage calibration on a power amplifier, which comprises a voltage calibration circuit and a power amplification circuit, wherein a first end and a second end of the voltage calibration circuit are respectively and electrically connected with a first end and a second end of the power amplification circuit, a third end and a fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct-current voltage source, a fifth end of the voltage calibration circuit is used for grounding, and a third end and a fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating-current voltage source, and a fifth end of the power amplification circuit is used for grounding; the voltage calibration circuit is used for controlling the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit; and the power amplifying circuit is used for calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit. Therefore, the invention can control the input current of the power amplifying circuit by setting the voltage calibration circuit, thereby triggering the power amplifying circuit to calibrate the output voltage of the first end of the power amplifying circuit, so that the output voltage is clamped at high voltage and does not exceed the maximum limit value, thereby improving the stability of the power amplifying circuit while ensuring the linearity of the power amplifying circuit, and further being beneficial to protecting components of the power amplifying circuit; and closing the voltage calibration circuit when the output voltage of the first end of the power amplification circuit reaches a specified value, thereby being beneficial to saving power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a circuit for voltage calibration of a power amplifier according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another circuit for voltage calibration of a power amplifier according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a digital processing module according to an embodiment of the present invention;
FIG. 4 is a flow chart of the operating principle of a circuit for voltage calibration of a power amplifier disclosed in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a circuit for voltage calibration of a power amplifier according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for voltage calibration of a power amplifier according to an embodiment of the present invention;
Fig. 7 is an electronic device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, unless explicitly specified and limited otherwise, the term "electrically connected" in the description of the invention and in the claims and in the above-mentioned figures should be understood in a broad sense, for example, as a fixed electrical connection, as a removable electrical connection, or as an integral electrical connection; can be mechanically and electrically connected or can be mutually communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or article that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or article.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention discloses a circuit, a method and electronic equipment for voltage calibration of a power amplifier, which can control the input current of the power amplifier circuit by setting a voltage calibration circuit, thereby triggering the power amplifier circuit to calibrate the output voltage of a first end of the power amplifier circuit, so that the output voltage is clamped at a high voltage and does not exceed the maximum limit value, the linearity of the power amplifier circuit is ensured, the stability of the power amplifier circuit is improved, and the protection of components of the power amplifier circuit is facilitated; and closing the voltage calibration circuit when the output voltage of the first end of the power amplification circuit reaches a specified value, thereby being beneficial to saving power. The following will describe in detail.
Example 1
Referring to fig. 1, fig. 1 is a schematic diagram of a circuit for voltage calibration of a power amplifier according to an embodiment of the invention. The circuit for voltage calibration of the power amplifier described in fig. 1 may be applied to any electronic product (e.g., rf microwave electronic product) that needs power amplification, and the embodiment of the invention is not limited. As shown in fig. 1, the circuit includes a voltage calibration circuit and a power amplification circuit, wherein:
the first end and the second end of the voltage calibration circuit are respectively and electrically connected with the first end and the second end of the power amplification circuit, the third end and the fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct-current voltage source, the fifth end of the voltage calibration circuit is used for grounding, the third end and the fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating-current voltage source, and the fifth end of the power amplification circuit is used for grounding;
the voltage calibration circuit is used for controlling the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit;
and the power amplifying circuit is used for calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit.
The direct current voltage output by the direct current voltage source is determined by process limitation and circuit factors, wherein the circuit factors refer to output current of the voltage calibration circuit, gate voltage and drain voltage of a power amplifying device in the power amplifying circuit and the like. The alternating voltage output by the alternating voltage source is a feed-in signal of a power amplifying circuit in the power amplifying circuit.
The input voltage of the second end of the power amplifying circuit generates corresponding amplitude change along with the change of the output voltage of the first end of the power amplifying circuit, and the input voltage of the second end of the power amplifying circuit lags the output voltage of the first end of the power amplifying circuit for a certain time.
Therefore, the circuit for performing voltage calibration on the power amplifier described in fig. 1 can set the voltage calibration circuit to control the input current of the power amplification circuit, so as to trigger the power amplification circuit to calibrate the output voltage at the first end of the power amplification circuit, so that the output voltage is clamped at a high voltage and does not exceed the maximum limit value, the linearity of the power amplification circuit is ensured, the stability of the power amplification circuit is improved, and the protection of components of the power amplification circuit is facilitated; and turning off the voltage calibration circuit when the output voltage of the first end reaches a specified value, thereby facilitating power saving.
In an alternative embodiment, the power amplifying circuit may be further configured to adjust an input current of the power amplifying circuit to obtain an adjusted input current;
wherein, adjusting the input current of the power amplifying circuit to obtain the adjusted input current may include:
acquiring current influence parameters of the power amplification circuit, wherein the current influence parameters of the power amplification circuit are influence parameters aiming at input current of the power amplification circuit, and the influence parameters of the power amplification circuit comprise environment parameters of an environment where the power amplification circuit is positioned and device parameters of all components in the power amplification circuit;
determining a current adjustment parameter of the power amplifying circuit according to the current influence parameter of the power amplifying circuit;
according to the current adjustment parameters of the power amplifying circuit, adjusting the input current of the power amplifying circuit to obtain an adjusted input current;
wherein, according to the current influence parameter of the power amplifying circuit, confirm the current adjustment parameter of the power amplifying circuit, include:
determining a first adjustment parameter of the power amplification circuit according to an environmental parameter of an environment in which the power amplification circuit is positioned;
determining a second adjustment parameter of the power amplification circuit according to the device parameters of all components in the power amplification circuit;
And calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit, comprising:
and calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the adjusted input current.
Optionally, the environmental parameter includes one or more of a temperature parameter, a humidity parameter, a magnetic field parameter, and the like, and the device parameter of the component may include a voltage maximum value of the component, a current maximum value of the component, and a power maximum value of the component.
Therefore, according to the alternative embodiment, the first adjustment parameters corresponding to the environmental parameters of the environment where the power amplification circuit is located and the second adjustment parameters corresponding to the device parameters of all the components in the power amplification circuit can be determined through the power amplification circuit, so that the input current of the power amplification circuit can be accurately adjusted, the accuracy of determining the input current of the power amplification circuit is improved, and the accuracy of calibrating the output voltage of the first end of the power amplification circuit is improved.
In an alternative embodiment, as shown in fig. 2, fig. 2 is a schematic diagram of another circuit for voltage calibration of a power amplifier according to an embodiment of the present invention, vdd in fig. 2 is a power supply, V dc Is the direct current voltage output by the direct current voltage source, V s The output voltage at the Vd1 point is the output voltage at the first end of the power amplifying circuit, i.e. the voltage point in the circuit where voltage calibration is needed. As shown in fig. 2, the voltage calibration circuit includes a comparator P, a bias current mirror I, and a bias resistor R;
the non-inverting input end of the comparator P is electrically connected with a direct-current voltage source, the inverting input end of the comparator P is electrically connected with the first end of the power amplifying circuit, the output end of the comparator P is electrically connected with the first end of the bias current mirror I, the second end of the bias current mirror I is respectively electrically connected with one end of the bias resistor R and the second end of the power amplifying circuit, the third end of the bias current mirror I is electrically connected with a power supply, and the other end of the bias resistor R is grounded;
the comparator P is used for generating a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplifying circuit;
And the bias current mirror I is used for controlling the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator P.
The difference between the direct current voltage output by the direct current voltage source and the maximum output voltage of the first end of the power amplifying circuit is smaller than or equal to a preset value.
When the comparator P finishes the calibration operation on the output voltage of the first end of the power amplifying circuit, the comparator P is turned off, and when the comparator P is turned off, the voltage calibration circuit is also turned off. For example, when the comparator compares the input voltage at the non-inverting input terminal (the DC voltage V output by the DC voltage source dc ) And the comparator P is determined to perform the calibration operation when the input voltage of the inverting input terminal of the comparator (the output voltage Vd1 of the first terminal of the power amplifying circuit) is equal.
It can be seen that this alternative embodiment is capable of outputting a dc voltage V to the dc voltage source in accordance with the comparator P dc The output voltage Vd1 at the first end of the power amplification circuit is compared, the accuracy of the generated voltage comparison signal is improved, and when the output voltage at the first end of the power amplification circuit is calibrated, the comparator P can be closed, so that the power saving is facilitated; and according to the voltage comparison signal which is accurately generated, the control accuracy of the input current of the power amplification circuit can be improved, so that the output voltage Vd1 of the first end of the power amplification circuit can be accurately calibrated.
In this alternative embodiment, as an alternative implementation manner, the voltage calibration circuit further includes a digital processing module, a first end of the digital processing module is electrically connected to the output end of the comparator P, and a second end of the digital processing module is electrically connected to the first end of the bias current mirror I, where:
the digital processing module is used for generating a current control signal of the bias current mirror I according to the received voltage comparison signal sent by the comparator P.
The current control signal is used for controlling the output current of the bias current mirror I, the output current of the bias current mirror I comprises the input current of the power amplifying circuit and the input current of the bias resistor R, and when the comparator P is turned off, the digital processing module is also turned off.
In the circuit, the processing and control of the current signal are realized by the digital signal and the corresponding digital control algorithm, and compared with the processing and control of the current signal realized by the analog signal, the circuit has advantages in the aspects of delaying the input voltage of the second end of the power amplifying circuit by the output voltage of the first end, chip processing and debugging, electromagnetic environment and the like.
Therefore, the alternative implementation manner can convert the signal type of the voltage comparison signal sent by the comparator P and process the converted signal through the digital processing module, so that the accuracy and flexibility of the generated current control signal of the bias current mirror I are improved, and the control accuracy and control flexibility of the output current of the bias current mirror I are improved.
In this alternative embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a digital processing module according to the present disclosure, where the digital processing module includes an analog-to-digital converter Q1, a digital-to-analog converter Q2, and a digital processing unit S, a first end of the analog-to-digital converter Q1 is electrically connected to an output end of the comparator P, a second end of the analog-to-digital converter Q1 is electrically connected to a first end of the digital processing unit S, a second end of the digital processing unit S is electrically connected to a first end of the digital-to-analog converter Q2, and a second end of the digital-to-analog converter Q2 is electrically connected to a first end of the bias current mirror I, where:
an analog-to-digital converter Q1 for converting the received voltage comparison signal transmitted by the comparator P into a first digital signal;
the digital processing unit S is used for processing the received first digital signal sent by the analog-to-digital converter Q1 according to the determined signal parameters to obtain a second digital signal;
the digital-to-analog converter Q2 is configured to generate a current control signal for biasing the current mirror I according to the received second digital signal sent by the digital processing unit S.
The signal parameters include signal amplitude and signal phase, wherein the signal amplitude may be signal amplitude of the second digital signal, or may be signal amplitude difference between the first digital signal and the second digital signal, and the signal phase may be signal phase of the second digital signal, or may be phase difference between the first digital signal and the second digital signal. Alternatively, the digital processing unit S may be a DSP chip or an FPGA chip, which is not limited in the embodiment of the present invention.
It can be seen that the alternative implementation manner can also convert the signal type of the input voltage comparison signal from the analog signal type to the digital signal type through the digital processing module, so as to obtain the first digital signal, and process the first digital signal according to the designated signal amplitude and signal phase, so that the accuracy of determining the second digital signal is improved, and the accuracy and reliability of the generated current control signal are improved according to the accurately determined second digital signal.
In an alternative embodiment, the power amplifying circuit includes a first power amplifying device T1 and a second power amplifying device T2;
the first end of the first power amplifier device T1 is electrically connected to a power supply, the second end of the first power amplifier device T1 is electrically connected to a second end of a bias current mirror I included in the voltage calibration circuit, the first end of the second power amplifier device T2 is electrically connected to a third end of the first power amplifier device T1 and an inverting input end of a comparator P included in the voltage calibration circuit, the second end of the second power amplifier device T2 is electrically connected to an ac voltage source, and the third end of the second power amplifier device T2 is grounded.
Alternatively, the first power amplifier device T1 and the second power amplifier device T2 may be N-type MOS transistors, or may be P-type MOS transistors, which is not limited by the embodiment of the present invention. Taking an N-type MOS transistor as an example, the first power amplifier device T1 and the second power amplifier device T2 form a cascode structure, where the first end of the first power amplifier device T1 is a drain, the second end of the first power amplifier device T1 is a gate, the third end of the first power amplifier device T1 is a source, the first end of the second power amplifier device T2 is a drain, the second end of the second power amplifier device T2 is a gate, the third end of the second power amplifier device T2 is a source, at this time, the output voltage Vd1 at the first end of the power amplifier circuit is the output voltage at the first end of the second power amplifier device T2, that is, the drain voltage of the second power amplifier device T2, and the input voltage at the second end of the power amplifier circuit is the input voltage at the second end of the first power amplifier device T1, that is, the gate voltage of the first power amplifier device T1.
Therefore, in this alternative embodiment, the bias current mirror is capable of controlling the input current of the second end of the first power amplifying device T1, so as to control the input voltage of the second end of the first power amplifying device T1, and trigger the power amplifying circuit to calibrate the output voltage of the first end of the second power amplifying device T2 according to the input voltage of the second end of the first power amplifying device T1, so that the calibration efficiency and the calibration speed of the output voltage of the first end of the second power amplifying device T2 can be improved.
The working principle of the circuit for voltage calibration of a power amplifier according to the present invention will be described in detail with reference to fig. 2 and 3, as follows:
in the embodiment of the invention, when the power supply, the direct-current voltage source and the alternating-current voltage source start to be electrified, the comparator P outputs the direct-current voltage V to the direct-current voltage source dc Comparing the first power amplifier with the output voltage Vd1 at the first end of the second power amplifier T2 and generating a voltage comparison signal; the voltage comparison signal output by the comparator P is input into a digital processing module, the voltage comparison signal is converted into a digital signal type from an analog signal type through an analog-to-digital converter in the digital processing module, a first digital signal obtained after the conversion into the digital signal type is processed through a digital processing unit according to the appointed signal amplitude and phase to obtain a second digital signal, and the second digital signal is converted into a current control signal capable of controlling the output current of the bias current mirror through a digital-to-analog converter; controlling the output current of the bias current mirror according to the current control signal output by the digital processing module, thereby controlling the input current of the second end of the first power amplifying device T1; the input voltage of the second end of the first power amplifying device T1 is controlled by the input current of the second end of the first power amplifying device T1, and the input voltage of the second end of the first power amplifying device T1 is controlled by the input current of the second end of the first power amplifying device T1 The input voltage of the terminal calibrates the output voltage Vd1 of the first terminal of the second power amplifier device T2 to make the output voltage Vd1 of the first terminal of the second power amplifier device T2 equal to the DC voltage V output by the DC voltage source dc The stability of the power amplification circuit can be improved while the linearity of the power amplification circuit is ensured, and the calibration efficiency and the calibration speed of the output voltage of the first end of the second power amplification device T2 can be improved; and after the output voltage of the first end of the second power amplifier device T2 is calibrated, the comparator P is turned off, which is beneficial to saving power.
Example two
Referring to fig. 4, fig. 4 is a schematic diagram of a circuit for voltage calibration of a power amplifier according to another embodiment of the present invention. The circuit for voltage calibration of the power amplifier described in fig. 4 may be applied to any electronic product (e.g., rf microwave electronic product) that needs power amplification, and the embodiment of the invention is not limited. As shown in fig. 4, the power amplifying circuit includes a current replication module, a first power amplifying device T1 and a second power amplifying device T2, where a first end of the current replication module is electrically connected to a power supply, a second end of a bias current mirror I included in a voltage calibration circuit, and a second end of the first power amplifying device T1, a second end of the current replication module is electrically connected to a second end of the bias current mirror I, a third end of the current replication module is electrically connected to an inverting input end of a comparator P included in the voltage calibration circuit, a fourth end of the current replication module is electrically connected to an ac voltage source, a first end of the first power amplifying device T1 is electrically connected to the power supply, a third end of the first power amplifying device T1 is electrically connected to a first end of the second power amplifying device T2, a second end of the second power amplifying device T2 is electrically connected to the ac voltage source, and a third end of the second power amplifying device T2 is grounded, where:
The current replication module is used for replicating the current of the branch where the first power amplification device T1 and the second power amplification device T2 are located, so that the output voltage of the third end of the current replication module is equal to the output voltage of the first end of the power amplification circuit.
The output voltage of the third terminal of the current replication module is the output voltage of Vd2 in fig. 4. The current replication module can avoid parallel connection of the inverting input end of the comparator P and the first end of the second power amplification device T2, so as to reduce the capacity of parasitic capacitance between the inverting input end of the comparator P and the first end of the second power amplification device T2.
It should be noted that, for the description of the voltage calibration circuit in the circuit for performing voltage calibration on the power amplifier, please refer to the description of the related content in the above embodiment, which is not repeated herein.
As can be seen, the circuit for performing voltage calibration on the power amplifier described in fig. 4 can accurately control the input current of the second end of the current replication module through the output current of the bias current mirror I, so as to trigger the power amplification circuit to calibrate the output voltage of the third end of the current replication module, thereby realizing indirect calibration on the output voltage of the first end of the second power amplification device T2, and being beneficial to improving the calibration accuracy and the calibration reliability on the output voltage of the first end of the second power amplification device T2; meanwhile, by arranging the current replication module between the inverting input end of the comparator P and the first end of the second power amplification device T2, the parallel connection of the inverting input end of the comparator P and the first end of the second power amplification device T2 can be avoided, so that the capacity of parasitic capacitance between the inverting input end of the comparator P and the first end of the second power amplification device T2 can be reduced, and further the linearity of the power amplification circuit can be further improved.
In this alternative embodiment, as an alternative implementation manner, the current replication module includes a third power amplifying device T3 and a fourth power amplifying device T4;
the first end of the third power amplifying device T3 is electrically connected to the power supply, the second end of the bias current mirror I and the second end of the first power amplifying device T1, the second end of the third power amplifying device T3 is electrically connected to the second end of the bias current mirror I, the first end of the fourth power amplifying device T4 is electrically connected to the third end of the third power amplifying device T3 and the inverting input end of the comparator P, the second end of the fourth power amplifying device T4 is electrically connected to the ac voltage source, and the third end of the fourth power amplifying device T4 is grounded.
The third power amplifier device T3 is a duplicated first power amplifier device T1, and the fourth power amplifier device T4 is a duplicated second power amplifier device T2. The output voltage Vd2 at the first end of the fourth power amplifier device T4 is the gate voltage of the fourth power amplifier device T4.
It can be seen that this alternative embodiment is capable of accurately calibrating the output voltage of the first terminal of the fourth power amplifying device T4 by the input current of the second terminal of the third power amplifying device T3, thereby accurately achieving the indirect calibration of the output voltage of the first terminal of the second power amplifying device T2.
In the present invention, as shown in fig. 5, fig. 5 is a flowchart of the working principle of a circuit for voltage calibration of a power amplifier disclosed in the present invention, and as shown in fig. 5, the flow of the working principle of the circuit is as follows:
step 101, a power supply, a direct current voltage source and an alternating current voltage source are powered on.
Step 102, adjusting the output current of the bias current mirror to make the DC voltage V of the DC voltage source dc Is equal to the output voltage Vd1 at the first end of the second power amplifying device T2.
After the execution of step 102 is completed, step 103 is executed.
Step 103, turn off the comparator P and the current replica module.
After step 103 is performed, detecting whether the circuit needs to be started, and if so, re-performing step 101; if not, the process is ended. The condition that the circuit needs to be started refers to a condition that the output voltage Vd1 at the first end of the second power amplifying device T2 in the circuit needs to be calibrated.
In step 102 of the present invention, the working principle of adjusting the output current of the bias current mirror so that the dc voltage of the dc voltage source is equal to the output voltage of the first end of the second power amplifying device T2 is as follows:
the DC voltage V output to the DC voltage source by the comparator P dc And a fourth power amplifying device T4The output voltage Vd2 at one end is compared, and a voltage comparison signal is generated; the voltage comparison signal output by the comparator P is input into a digital processing module, the voltage comparison signal is converted into a digital signal type from an analog signal type through an analog-to-digital converter in the digital processing module, a first digital signal obtained after the conversion into the digital signal type is processed through a digital processing unit according to the appointed signal amplitude and phase to obtain a second digital signal, and the second digital signal is converted into a current control signal capable of controlling the output current of the bias current mirror through a digital-to-analog converter; controlling the output current of the bias current mirror according to the current control signal output by the digital processing module, thereby controlling the input current of the second end of the third power amplifying device T3 in the current copying module; the input voltage of the second end of the third power amplifying device T3 is controlled by the input current of the second end of the third power amplifying device T3, the output voltage Vd2 of the first end of the fourth power amplifying device T4 is calibrated by the input voltage of the second end of the third power amplifying device T3, and the output voltage Vd2 of the first end of the fourth power amplifying device T4 is equal to the direct current voltage V output by the direct current voltage source dc The output voltage Vd1 at the first end of the second power amplifying device T2 is equal to the output voltage Vd2 at the first end of the fourth power amplifying device T4 through the current replication module, namely the output voltage Vd1 at the first end of the second power amplifying device T2 is also equal to the direct current voltage V output by the direct current voltage source dc The linearity of the power amplifying circuit can be ensured, and meanwhile, the stability of the power amplifying circuit is improved, so that the protection of components of the power amplifying circuit is facilitated; and by arranging the current replication module between the inverting input end of the comparator and the first end of the second power amplification device T2, the capacity of parasitic capacitance between the inverting input end of the comparator and the first end of the second power amplification device T2 can be reduced, so that the linearity of the power amplification circuit is further improved.
Example III
Referring to fig. 6, fig. 6 is a flowchart of a method for voltage calibration of a power amplifier according to an embodiment of the invention. The method is applied to an electronic product (such as a radio frequency microwave electronic product) provided with a circuit for carrying out voltage calibration on the power amplifier, wherein the circuit for carrying out voltage calibration on the power amplifier comprises a voltage calibration circuit and a power amplification circuit, a first end and a second end of the voltage calibration circuit are respectively and electrically connected with a first end and a second end of the power amplification circuit, a third end and a fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct current voltage source, a fifth end of the voltage calibration circuit is used for grounding, and a third end and a fourth end of the power amplification circuit are respectively and electrically connected with the power supply and an alternating current voltage source, and a fifth end of the power amplification circuit is used for grounding; as shown in fig. 6, the method may include the steps of:
201. The voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit.
202. The power amplifying circuit calibrates the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit.
It should be noted that, for other descriptions of the circuit for voltage calibration of the power amplifier, please refer to the other descriptions of the circuit for voltage calibration of the power amplifier in the first embodiment, and the descriptions thereof are omitted herein.
Therefore, the method for performing voltage calibration on the power amplifier described in fig. 6 can control the input current of the power amplifier circuit by setting the voltage calibration circuit, so as to trigger the power amplifier circuit to calibrate the output voltage of the first end of the power amplifier circuit, so that the output voltage is clamped at a high voltage and does not exceed the maximum limit value, thereby improving the stability of the power amplifier circuit while ensuring the linearity of the power amplifier circuit, and further being beneficial to protecting components of the power amplifier circuit; and closing the voltage calibration circuit when the output voltage of the first end of the power amplification circuit reaches a specified value, thereby being beneficial to saving power.
In an alternative embodiment, the voltage calibration circuit comprises a comparator P, a bias current mirror I and a bias resistor R, wherein the non-inverting input end of the comparator P is used for being electrically connected with a direct-current voltage source, the inverting input end of the comparator P is electrically connected with the first end of the power amplification circuit, the output end of the comparator P is electrically connected with the first end of the bias current mirror I, the second end of the bias current mirror I is respectively electrically connected with one end of the bias resistor R and the second end of the power amplification circuit, the third end of the bias current mirror I is used for being electrically connected with a power supply, and the other end of the bias resistor R is used for being grounded;
the voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit, and the voltage calibration circuit can comprise:
the comparator P generates a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplifying circuit;
the bias current mirror I controls the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator P.
It can be seen that this alternative embodiment is capable of outputting a DC voltage V in accordance with a DC voltage source dc The output voltage Vd1 at the first end of the power amplification circuit improves the accuracy of the generated voltage comparison signal, and when the output voltage at the first end of the power amplification circuit is calibrated, the comparator P can be closed, so that the power is saved; and according to the voltage comparison signal which is accurately generated, the control accuracy of the input current of the power amplification circuit can be improved, so that the output voltage Vd1 of the first end of the power amplification circuit can be accurately calibrated.
In this alternative embodiment, as an alternative implementation manner, the voltage calibration circuit further includes a digital processing module, a first end of the digital processing module is electrically connected to the output end of the comparator P, and a second end of the digital processing module is electrically connected to the first end of the bias current mirror I;
the method may further comprise:
the digital processing module generates a current control signal of the bias current mirror I according to the received voltage comparison signal sent by the comparator P, wherein the current control signal is used for controlling the output current of the bias current mirror I, and the output current of the bias current mirror I comprises the input current of the power amplifying circuit and the input current of the bias resistor R.
Therefore, the alternative implementation manner can convert the signal type of the voltage comparison signal sent by the comparator P and process the converted signal through the digital processing module, so that the accuracy and flexibility of the generated current control signal of the bias current mirror I are improved, and the control accuracy and control flexibility of the output current of the bias current mirror I are improved.
In this alternative embodiment, optionally, the digital processing module includes an analog-to-digital converter Q1, a digital-to-analog converter Q2, and a digital processing unit S, where a first end of the analog-to-digital converter Q1 is electrically connected to an output end of the comparator P, a second end of the analog-to-digital converter Q1 is electrically connected to a first end of the digital processing unit S, a second end of the digital processing unit S is electrically connected to a first end of the digital-to-analog converter Q2, and a second end of the digital-to-analog converter Q2 is electrically connected to a first end of the bias current mirror I;
the digital processing module generates a current control signal of the bias current mirror (I) according to the received voltage comparison signal sent by the comparator P, and may include:
the analog-to-digital converter Q1 converts the received voltage comparison signal sent by the comparator P into a first digital signal;
the digital processing unit S processes the received first digital signal sent by the analog-to-digital converter Q1 according to the determined signal parameters to obtain a second digital signal, wherein the signal parameters comprise signal amplitude and signal phase;
the digital-to-analog converter Q2 generates a current control signal for biasing the current mirror I based on the received second digital signal sent by the digital processing unit S.
It can be seen that the alternative embodiment can also convert the signal type of the input voltage comparison signal from the analog signal type to the digital signal type, obtain the first digital signal, process the first digital signal according to the designated signal amplitude and signal phase, improve the accuracy of determining the second digital signal, and according to the second digital signal determined accurately, be favorable to improving the accuracy and reliability of the generated current control signal.
In another alternative embodiment, the power amplifying circuit includes a first power amplifying device T1 and a second power amplifying device T2;
the first end of the first power amplifier device T1 is electrically connected to a power supply, the second end of the first power amplifier device T1 is electrically connected to a second end of a bias current mirror I included in the voltage calibration circuit, the first end of the second power amplifier device T2 is electrically connected to a third end of the first power amplifier device T1 and an inverting input end of a comparator P included in the voltage calibration circuit, the second end of the second power amplifier device T2 is electrically connected to an ac voltage source, and the third end of the second power amplifier device T2 is grounded.
It can be seen that the alternative embodiment can control the input voltage of the second end of the first power amplifying device T1 by controlling the input current of the second end of the first power amplifying device T1, and calibrate the output voltage of the first end of the second power amplifying device T2 according to the input voltage of the second end of the first power amplifying device T1, so as to improve the calibration efficiency and the calibration speed of the output voltage of the first end of the second power amplifying device T2.
In yet another alternative embodiment, the power amplifying circuit includes a current replication module, a first power amplifying device T1 and a second power amplifying device T2, where a first end of the current replication module is electrically connected to a power supply, a second end of a bias current mirror I included in the voltage calibration circuit, and a second end of the first power amplifying device T1, a second end of the current replication module is electrically connected to a second end of the bias current mirror I, a third end of the current replication module is electrically connected to an inverting input end of a comparator P included in the voltage calibration circuit, a fourth end of the current replication module is electrically connected to an ac voltage source, a first end of the first power amplifying device T1 is electrically connected to the power supply, a third end of the first power amplifying device T1 is electrically connected to a first end of the second power amplifying device T2, a second end of the second power amplifying device T2 is electrically connected to an ac voltage source, and a third end of the second power amplifying device T2 is connected to ground;
The power amplifying circuit calibrates the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit, and can comprise:
the current replication module replicates the current of the branch where the first power amplifying device T1 and the second power amplifying device T2 are located, so that the output voltage of the third end of the current replication module is equal to the output voltage of the first end of the power amplifying circuit;
the power amplifying circuit calibrates the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source, the current copied by the current copying module and the current of the branch where the first power amplifying device (T1) and the second power amplifying device (T2) are located.
Therefore, the optional embodiment can accurately calibrate the output voltage of the third end of the current replication module through the input current of the second end of the current replication module, thereby realizing indirect calibration of the output voltage of the first end of the second power amplification device T2, and being beneficial to improving the accuracy and reliability of calibrating the output voltage of the first end of the second power amplification device T2; meanwhile, by arranging the current replication module between the inverting input end of the comparator P and the output voltage of the first end of the second power amplification device, the parallel connection of the inverting input end of the comparator P and the first end of the second power amplification device can be avoided, so that the capacity of parasitic capacitance between the inverting input end of the comparator P and the output voltage of the first end of the second power amplification device can be reduced, and further the linearity of the power amplification circuit can be improved.
In this alternative embodiment, the current replication module includes a third power amplifying device T3 and a fourth power amplifying device T4;
the first end of the third power amplifying device T3 is electrically connected to the power supply, the second end of the bias current mirror I and the second end of the first power amplifying device T1, the second end of the third power amplifying device T3 is electrically connected to the second end of the bias current mirror I, the first end of the fourth power amplifying device T4 is electrically connected to the third end of the third power amplifying device T3 and the inverting input end of the comparator P, the second end of the fourth power amplifying device T4 is electrically connected to the ac voltage source, and the third end of the fourth power amplifying device T4 is grounded.
It can be seen that this alternative embodiment is capable of accurately calibrating the output voltage of the first terminal of the fourth power amplifying device T4 by the input current of the second terminal of the third power amplifying device T3, thereby accurately achieving the indirect calibration of the output voltage of the first terminal of the second power amplifying device T2.
Example IV
Referring to fig. 7, fig. 7 shows an electronic device according to an embodiment of the present invention, the electronic device is an electronic product provided with a circuit for voltage calibration of a power amplifier, and the electronic device includes a housing, and the electronic device further includes a circuit for voltage calibration of a power amplifier according to the first or second embodiment, and the electronic device is used for implementing the method for voltage calibration of a power amplifier according to the third embodiment, where the housing is used for placing the circuit for voltage calibration of a power amplifier. It should be noted that, for the detailed description of the circuit for performing voltage calibration on the power amplifier, please refer to the detailed description of the related contents in the first embodiment and the second embodiment, and the description is omitted herein.
Therefore, the electronic device shown in fig. 7 can calibrate the output voltage of the first end of the power amplifying circuit by setting the voltage calibration circuit, so that the output voltage is clamped at a high voltage and does not exceed the maximum limit value, thereby improving the stability of the power amplifying circuit while ensuring the linearity of the power amplifying circuit, and further being beneficial to protecting components of the power amplifying circuit; and closing the voltage calibration circuit when the output voltage of the first end of the power amplification circuit reaches a specified value, thereby being beneficial to saving power.
Finally, it should be noted that: the circuit, the method and the electronic device for performing voltage calibration on the power amplifier disclosed by the embodiment of the invention are only disclosed as the preferred embodiment of the invention, and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A circuit for voltage calibration of a power amplifier, the circuit comprising a voltage calibration circuit and a power amplification circuit, wherein:
the first end and the second end of the voltage calibration circuit are respectively and electrically connected with the first end and the second end of the power amplification circuit, the third end and the fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct-current voltage source, the fifth end of the voltage calibration circuit is used for grounding, and the third end and the fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating-current voltage source, and the fifth end of the power amplification circuit is used for grounding;
the voltage calibration circuit is used for controlling the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit;
the power amplifying circuit is used for calibrating the output voltage of the first end of the power amplifying circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplifying circuit.
2. A circuit for voltage calibration of a power amplifier according to claim 1, characterized in that the voltage calibration circuit comprises a comparator (P), a bias current mirror (I) and a bias resistor (R);
The non-inverting input end of the comparator (P) is used for being electrically connected with the direct-current voltage source, the inverting input end of the comparator (P) is electrically connected with the first end of the power amplifying circuit, the output end of the comparator (P) is electrically connected with the first end of the bias current mirror (I), the second end of the bias current mirror (I) is respectively electrically connected with one end of the bias resistor (R) and the second end of the power amplifying circuit, the third end of the bias current mirror (I) is used for being electrically connected with the power supply, and the other end of the bias resistor (R) is used for being grounded;
the comparator (P) is used for generating a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit; the difference between the direct current voltage output by the direct current voltage source and the maximum output voltage of the first end of the power amplifying circuit is smaller than or equal to a preset value;
the bias current mirror (I) is used for controlling the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator (P).
3. A circuit for voltage calibration of a power amplifier according to claim 2, characterized in that the voltage calibration circuit further comprises a digital processing module, a first terminal of which is electrically connected to the output of the comparator (P), and a second terminal of which is electrically connected to the first terminal of the bias current mirror (I), wherein:
The digital processing module is used for generating a current control signal of the bias current mirror (I) according to the received voltage comparison signal sent by the comparator (P), wherein the current control signal is used for controlling the output current of the bias current mirror (I), and the output current of the bias current mirror (I) comprises the input current of the power amplifying circuit and the input current of the bias resistor (R).
4. A circuit for voltage calibration of a power amplifier according to claim 3, characterized in that the digital processing module comprises an analog-to-digital converter (Q1), a digital-to-analog converter (Q2) and a digital processing unit (S), a first end of the analog-to-digital converter (Q1) being electrically connected to the output of the comparator (P), a second end of the analog-to-digital converter (Q1) being electrically connected to the first end of the digital processing unit (S), a second end of the digital processing unit (S) being electrically connected to the first end of the digital-to-analog converter (Q2), a second end of the digital-to-analog converter (Q2) being electrically connected to the first end of the bias current mirror (I), wherein:
-said analog-to-digital converter (Q1) for converting a received voltage comparison signal sent by said comparator (P) into a first digital signal;
The digital processing unit (S) is used for processing the received first digital signal sent by the analog-to-digital converter (Q1) according to the determined signal parameters to obtain a second digital signal, wherein the signal parameters comprise signal amplitude and signal phase;
the digital-to-analog converter (Q2) is used for generating a current control signal of the bias current mirror (I) according to the received second digital signal sent by the digital processing unit (S).
5. A circuit for voltage calibration of a power amplifier according to any of the claims 1-4, characterized in that the power amplifying circuit comprises a first power amplifying device (T1) and a second power amplifying device (T2);
the first end of the first power amplifying device (T1) is used for being electrically connected with the power supply, the second end of the first power amplifying device (T1) is electrically connected with the second end of the bias current mirror (I) contained in the voltage calibration circuit, the first end of the second power amplifying device (T2) is respectively and electrically connected with the third end of the first power amplifying device (T1) and the inverting input end of the comparator (P) contained in the voltage calibration circuit, the second end of the second power amplifying device (T2) is used for being electrically connected with the alternating current voltage source, and the third end of the second power amplifying device (T2) is used for being grounded.
6. Circuit for voltage calibration of a power amplifier according to any of claims 1-4, characterized in that the power amplifying circuit comprises a current replica module, a first power amplifying device (T1) and a second power amplifying device (T2), a first terminal of the current replica module being electrically connected to the power supply, a second terminal of a bias current mirror (I) comprised in the voltage calibration circuit and a second terminal of the first power amplifying device (T1), respectively, a second terminal of the current replica module being electrically connected to a second terminal of the bias current mirror (I), a third terminal of the current replica module being electrically connected to an inverting input terminal of a comparator (P) comprised in the voltage calibration circuit, a fourth terminal of the current replica module being for electrically connecting to the ac voltage source, a first terminal of the first power amplifying device (T1) being for electrically connecting to the power supply, a third terminal of the first power amplifying device (T1) being electrically connected to a second terminal of the second power amplifying device (T2), a third terminal of the current replica module being for connecting to the ac voltage source (T2):
The current replication module is configured to replicate currents of branches where the first power amplifying device (T1) and the second power amplifying device (T2) are located, so that an output voltage of a third end of the current replication module is equal to an output voltage of a first end of the power amplifying circuit.
7. The circuit for voltage calibration of a power amplifier according to claim 6, characterized in that the current replication module comprises a third power amplifying device (T3) and a fourth power amplifying device (T4);
the first end of the third power amplifying device (T3) is electrically connected with the power supply, the second end of the bias current mirror (I) and the second end of the first power amplifying device (T1) respectively, the second end of the third power amplifying device (T3) is electrically connected with the second end of the bias current mirror (I), the first end of the fourth power amplifying device (T4) is electrically connected with the third end of the third power amplifying device (T3) and the inverting input end of the comparator (P) respectively, the second end of the fourth power amplifying device (T4) is electrically connected with the alternating voltage source, and the third end of the fourth power amplifying device (T4) is grounded.
8. The method for voltage calibration of the power amplifier is characterized in that the method is applied to a circuit for voltage calibration of the power amplifier, wherein the circuit for voltage calibration of the power amplifier comprises a voltage calibration circuit and a power amplification circuit, a first end and a second end of the voltage calibration circuit are respectively and electrically connected with the first end and the second end of the power amplification circuit, a third end and a fourth end of the voltage calibration circuit are respectively and electrically connected with a power supply and a direct current voltage source, a fifth end of the voltage calibration circuit is used for grounding, a third end and a fourth end of the power amplification circuit are respectively and electrically connected with the power supply and the alternating current voltage source, and a fifth end of the power amplification circuit is used for grounding; the method comprises the following steps:
The voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit;
the power amplification circuit calibrates the output voltage of the first end of the power amplification circuit according to the received alternating voltage output by the alternating voltage source and the input current of the power amplification circuit.
9. The method for voltage calibration of a power amplifier according to claim 8, characterized in that the voltage calibration circuit comprises a comparator (P), a bias current mirror (I) and a bias resistor (R), wherein the non-inverting input of the comparator (P) is electrically connected to the dc voltage source, the inverting input of the comparator (P) is electrically connected to the first end of the power amplification circuit, the output of the comparator (P) is electrically connected to the first end of the bias current mirror (I), the second end of the bias current mirror (I) is electrically connected to one end of the bias resistor (R) and the second end of the power amplification circuit, respectively, the third end of the bias current mirror (I) is electrically connected to the power supply, and the other end of the bias resistor (R) is connected to ground;
The voltage calibration circuit controls the input current of the power amplification circuit according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplification circuit, and the voltage calibration circuit comprises:
the comparator (P) generates a voltage comparison signal according to the received direct current voltage output by the direct current voltage source and the output voltage of the first end of the power amplifying circuit;
the bias current mirror (I) controls the input current of the power amplifying circuit according to the received voltage comparison signal sent by the comparator (P).
10. An electronic device comprising a housing, wherein the electronic device further comprises a circuit for voltage calibration of a power amplifier according to any of claims 1-7, the housing for housing the circuit for voltage calibration of a power amplifier.
CN202310244103.1A 2023-03-14 2023-03-14 Circuit and method for voltage calibration of power amplifier and electronic equipment Pending CN116470867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310244103.1A CN116470867A (en) 2023-03-14 2023-03-14 Circuit and method for voltage calibration of power amplifier and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310244103.1A CN116470867A (en) 2023-03-14 2023-03-14 Circuit and method for voltage calibration of power amplifier and electronic equipment

Publications (1)

Publication Number Publication Date
CN116470867A true CN116470867A (en) 2023-07-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310244103.1A Pending CN116470867A (en) 2023-03-14 2023-03-14 Circuit and method for voltage calibration of power amplifier and electronic equipment

Country Status (1)

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CN (1) CN116470867A (en)

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