CN115913147A - Power amplifier circuit, device and radio frequency front end module - Google Patents
Power amplifier circuit, device and radio frequency front end module Download PDFInfo
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Abstract
The invention provides a power amplifier circuit, a power amplifier device and a radio frequency front-end module. The invention provides a power amplifier circuit, which comprises a voltage conversion circuit, a first power amplifier and at least one second power amplifier connected with the first power amplifier; the first power amplifier is used for receiving a first supply voltage; the voltage conversion circuit is used for receiving a preset voltage and the first power supply voltage and outputting a second power supply voltage to the second power amplifier according to the first power supply voltage; the preset voltage is used for supplying power to the voltage conversion circuit, and the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relation. The power amplifier circuit can reduce the power supply pressure of the power supply of the radio frequency power amplification system, thereby improving the stability and the power additional efficiency of the radio frequency power amplification system.
Description
Technical Field
The invention relates to the technical field of power amplifiers, in particular to a power amplifier circuit, a power amplifier device and a radio frequency front-end module.
Background
The radio frequency power amplification system is an important component of the radio frequency front end, and the electronic terminal can obtain higher radio frequency output power through the radio frequency power amplification system. At present, when the rf output power of the rf power amplifying system is high, the supply voltage of the rf power amplifying system is generally adjusted in real time to adapt to the rf output power change of the rf power amplifying system, and the power consumption of the rf power amplifying system is reduced, so that the working efficiency of the power supply for supplying power to the rf power amplifying system is better.
At present, the structure of a power amplifier generally comprises multi-stage cascade amplification or parallel amplification (such as a doherty architecture, a differential architecture, etc.), and a power supply is adopted for the multi-stage power amplifier, so that the power supply pressure of the power supply of a radio frequency power amplification system is too high, and the stability of the radio frequency power amplification system is further influenced.
Disclosure of Invention
The invention aims to provide a power amplifier circuit, a device and a radio frequency front-end module, which aim to solve the technical problem that the stability of a radio frequency power amplification system is poor due to the fact that the same power supply is adopted to supply power to a plurality of power amplifiers in the prior art.
The technical scheme of the invention is as follows, a power amplifier circuit is provided, which comprises: the power amplifier comprises a voltage conversion circuit, a first power amplifier and at least one second power amplifier connected with the first power amplifier;
the first power amplifier is used for receiving a first supply voltage;
the voltage conversion circuit is used for receiving a preset voltage and the first power supply voltage and outputting a second power supply voltage to the second power amplifier according to the first power supply voltage; the preset voltage is used for supplying power to the voltage conversion circuit, and the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relation. Through the technical scheme, the power supply pressure of the power supply of the power amplifier circuit can be reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are improved.
Furthermore, the number of the second power amplifier is one, the power supply terminal of the first power amplifier is configured to receive the first power supply voltage, the power supply terminal of the voltage conversion circuit is configured to receive the preset voltage, the input terminal of the voltage conversion circuit is configured to receive the first power supply voltage, and the output terminal of the voltage conversion circuit is configured to output the second power supply voltage to the power supply terminal of the second power amplifier. Through the technical scheme, the power supply for the two power amplifiers in the power amplifier circuit is realized through the voltage conversion circuit and the first power supply voltage, so that the load pressure of a power supply for providing the first power supply voltage is reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are further improved.
Furthermore, the number of the voltage conversion circuits and the number of the second power amplifiers are respectively multiple, and the voltage conversion circuits are equal to the number of the second power amplifiers in number and are in one-to-one correspondence.
Further, a power supply end of the first power amplifier is configured to receive the first power supply voltage, a power supply end of each voltage conversion circuit is configured to receive the preset voltage, an input end of each voltage conversion circuit is configured to receive the first power supply voltage, and an output end of each voltage conversion circuit outputs the second power supply voltage to the corresponding second power amplifier. By the technical scheme, more than two power amplifiers can be powered, the load pressure of a power supply source providing the first power supply voltage is reduced, oscillation caused by forming a power supply loop is avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are improved.
Furthermore, the power supply end of the first power amplifier is configured to receive the first power supply voltage, the power supply end of each voltage conversion circuit is configured to receive the preset voltage, in each two adjacent voltage conversion circuits, the output end of the previous voltage conversion circuit is connected to the input end of the next voltage conversion circuit, and the input end of the first voltage conversion circuit is configured to receive the first power supply voltage. By means of the technical scheme, power supply for more than two power amplifiers can be achieved, and load pressure of a power supply source providing the first power supply voltage is reduced.
Further, the voltage conversion circuit is configured to make the preset voltage connected with the power amplifier circuit and a first power supply voltage connected with the power amplifier circuit in an open loop state. Through the technical scheme, the preset voltage connected with the power amplifier circuit, the first power supply voltage connected with the power amplifier circuit, and the oscillation caused by the formation of a power supply loop between the first power amplifier and the voltage conversion circuit can be avoided.
Further, the voltage conversion circuit includes a first capacitor, a second capacitor, a first field effect transistor, a second field effect transistor, an inductor, and a pulse width modulator, where two ends of the first capacitor are input ends of the voltage conversion circuit, two ends of the first capacitor are further connected to a drain of the first field effect transistor and a first end of the pulse width modulator, respectively, a second end of the pulse width modulator is connected to a gate of the first field effect transistor, a third end of the pulse width modulator is connected to a gate of the second field effect transistor, a drain of the second field effect transistor is connected to a source of the first field effect transistor and one end of the inductor, a source of the second field effect transistor is connected to one end of the second capacitor, the other end of the second capacitor is connected to the other end of the inductor, and two ends of the second capacitor are output ends of the voltage conversion circuit. Through the technical scheme, the power amplifier can avoid singly using the first power supply voltage to supply power for all power amplifiers, not only reduces the power supply pressure of the power supply for providing the first power supply voltage, but also avoids the oscillation caused by forming a power supply loop, and further improves the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit.
Further, the method can be used for preparing a novel materialThe voltage conversion circuit comprises a first resistor, a second resistor, an operational amplifier, a third field effect transistor and a third capacitor, wherein one end of the first resistor is connected with a first input end of the operational amplifier and one end of the second resistor, the other end of the first resistor is connected with a drain electrode of the third field effect transistor and one end of the third capacitor, the drain electrode of the third field effect transistor is an output end of the voltage conversion circuit, a second input end of the operational amplifier is connected with a reference voltage, an output end of the operational amplifier is connected with a grid electrode of the third field effect transistor, and the third field effect transistor Q is connected with a grid electrode of the third field effect transistor 3 The source of the voltage conversion circuit 101 is the input end of the voltage conversion circuit, one end of the second resistor is connected to one end of the first resistor, and the other end of the second resistor is connected to the other end of the third capacitor. Through the technical scheme, the power amplifier can also avoid singly using the first power supply voltage to supply power for all the power amplifiers, so that the power supply pressure of the power supply providing the first power supply voltage is reduced, the oscillation caused by forming a power supply loop is avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are improved.
Further, the first power amplifier is connected in cascade with the second power amplifier, and an input end of the first power amplifier is connected to an output end of the second power amplifier. By means of the technical solution, a circuit consisting of two cascade-connected power amplifiers can be supplied, and in this case, the load pressure of the power supply source providing the first supply voltage is reduced.
Further, the first power amplifier and the second power amplifier form a differential amplification circuit, and the first power amplifier is configured to receive a first differential signal, amplify the first differential signal, and output a first differential amplified signal; the second power amplifier is configured to receive a second differential signal, amplify the second differential signal, and output a second differential amplified signal, where a phase of the first differential signal differs from a phase of the second differential signal by 180 degrees. By the technical scheme, the power supply can be realized by the differential amplification circuit consisting of the two power amplifiers, and the load pressure of the power supply source providing the first power supply voltage is reduced under the condition.
Further, the first power amplifier is connected in cascade with the plurality of second power amplifiers, an output end of the first power amplifier is coupled to the signal output end, an input end of the first power amplifier is connected to an output end of a first second power amplifier, an input end of a previous second power amplifier is connected to an output end of a next second power amplifier, and an input end of a last second power amplifier is coupled to the signal input end. By means of the technical scheme, power can be supplied to a circuit consisting of more than two cascade-connected power amplifiers, and under the condition, the load pressure of a power supply source providing the first power supply voltage is reduced.
Further, the first power amplifier includes at least one first amplifying transistor, the first amplifying transistor is a BJT, a base of the first amplifying transistor is an input terminal of the first power amplifier, a collector of the first amplifying transistor is an output terminal of the first power amplifier, and an emitter of the first amplifying transistor is connected to a ground terminal; or, the first amplifying transistor is an MOS transistor, a gate of the first amplifying transistor is an input end of the first power amplifier, a source of the first amplifying transistor is an output end of the first power amplifier, and a drain of the first amplifying transistor is connected to a ground end;
the second power amplifier comprises at least one second amplifying transistor, the second amplifying transistor is a BJT (bipolar junction transistor), the base electrode of the second amplifying transistor is the input end of the second power amplifier, the collector electrode of the second amplifying transistor is the output end of the second power amplifier, and the emitter electrode of the second amplifying transistor is connected to the ground end; or the second amplifying transistor is an MOS transistor, a gate of the second amplifying transistor is an input end of the second power amplifier, a source of the second amplifying transistor is an output end of the second power amplifier, and a drain of the second amplifying transistor is connected to a ground end.
Another technical solution of the present invention is as follows, further providing a power amplifier device, including the power amplifier circuit according to any one of the above technical solutions, further including a battery power supply module and a power supply module, where the battery power supply module is configured to provide the preset voltage, and the power supply module is configured to provide the first power supply voltage.
Another technical solution of the present invention is to provide a radio frequency front end module, including the power amplifier circuit according to any one of the above technical solutions.
According to the power amplifier circuit, the device and the radio frequency front-end module provided by the embodiment of the application, the first power amplifier receives a first power supply voltage; enabling the voltage conversion circuit to receive a preset voltage and the first power supply voltage, outputting a second power supply voltage according to the first power supply voltage, enabling the preset voltage to supply power to the voltage conversion circuit, and enabling the voltage value of the first power supply voltage and the voltage value of the second power supply voltage to be in a linear relation; causing the second power amplifier to receive a second supply voltage; therefore, the power supply pressure of the power supply of the power amplifier circuit can be reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability and the power added efficiency of the power amplifier circuit are improved.
Drawings
Fig. 1 is a schematic structural diagram of a power amplifier circuit according to an embodiment of the present invention;
fig. 2 is a first circuit schematic of a power amplifier circuit according to an embodiment of the present invention;
fig. 3 is a second circuit schematic of a power amplifier circuit provided by an embodiment of the invention;
fig. 4 is a third circuit schematic of a power amplifier circuit according to an embodiment of the present invention;
FIG. 5 is a first schematic circuit diagram of a voltage converting circuit according to an embodiment of the present invention;
FIG. 6 is a second circuit diagram of the voltage converting circuit according to the embodiment of the present invention;
fig. 7 is a fourth circuit schematic of a power amplifier circuit according to an embodiment of the present invention;
fig. 8 is a block diagram of a power amplifier device according to an embodiment of the present invention.
Reference numerals are as follows: 100-a power amplifier circuit; 101-a voltage conversion circuit; 102-a first power amplifier; 103-a second power amplifier; 200-a power amplifier device; 201-battery power module; 202-power supply module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order. The terms "comprising," "including," "having," and variations thereof in this specification mean "including, but not limited to," unless expressly specified otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Fig. 1 is a schematic structural diagram of a power amplifier circuit according to an embodiment of the present invention. It should be noted that the power amplifier circuit of the present invention is not limited to the structure diagram shown in fig. 1 if the same results are obtained. As shown in fig. 1, the power amplifier circuit 100 includes a voltage conversion circuit 101, a first power amplifier 102, and at least a second power amplifier 103 connected to the first power amplifier 102;
the first power amplifier 102 is configured to receive a first supply voltage;
the voltage conversion circuit 101 is configured to receive a preset voltage and the first power supply voltage, and output a second power supply voltage to the second power amplifier according to the first power supply voltage; the preset voltage is used for supplying power to the voltage conversion circuit 101, and a voltage value of the first power supply voltage and a voltage value of the second power supply voltage are in a linear relationship.
Alternatively, the first power amplifier 102 and the second power amplifier 103 may be two cascaded power amplifiers. For example: the first power amplifier 102 is a driver stage amplifier and the second power amplifier 103 is a power stage amplifier. Alternatively, the first power amplifier 102 and the second power amplifier 103 may constitute a differential amplifier, and a phase of the first rf input signal input to the first power amplifier 102 is different from a phase of the second rf input signal input to the second power amplifier 103 by 180 degrees. Alternatively, the first power amplifier 102 and the second power amplifier 103 may constitute a doherty power amplifier. For example: the first power amplifier 102 is a carrier amplifier, and the second power amplifier 103 is a peak amplifier. It should be noted that, in this embodiment, the types of the first power amplifier 102 and the second power amplifier 103 are not specifically limited.
In the power amplifier circuit provided by the embodiment of the present invention, the first power amplifier 102 receives a first supply voltage; enabling the voltage conversion circuit 101 to receive a preset voltage and the first power supply voltage, and outputting a second power supply voltage according to the first power supply voltage, so that the preset voltage supplies power to the voltage conversion circuit 101, wherein the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relationship; causing the second power amplifier 103 to receive a second supply voltage; therefore, the power supply pressure of a power supply of the power amplifier circuit can be reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are improved.
The voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relationship through the voltage conversion circuit, so that the voltage value of the second power supply voltage input to the power supply terminal VCC1 of the second power amplifier 103 is adjusted by adjusting the voltage value of the first power supply voltage or by configuring the voltage conversion circuit.
In one embodiment, the voltage value of the first supply voltage and the voltage value of the second supply voltage are linearly related to each other by the expression V 2 ＝aV 1 + b represents, V 1 Is the voltage value of the first supply voltage, V 2 The voltage value of the second power supply voltage is, a and b are parameters, and a can take the value of 0.5-1.5; for example, when a is 0.9 and b is 0, if V 1 Is 10V, then V 2 Is 9V, if V 1 At 5V, V2 is 4.5V.
In some embodiments, the second power amplifier 103 is configured as a single, the power supply terminal of the first power amplifier 102 is configured to receive the first power supply voltage, the power supply terminal of the voltage conversion circuit 101 is configured to receive the preset voltage, the input terminal of the voltage conversion circuit 101 is configured to receive the first power supply voltage, and the output terminal of the voltage conversion circuit 101 is configured to output the second power supply voltage to the power supply terminal of the second power amplifier 103.
In a specific embodiment, as shown in fig. 2, the preset voltage Vbatt may be provided by a battery Power module 201, the Power battery module may be a Power battery, and the first Power supply voltage is provided by a Power supply module 202, where the Power supply module 202 may be a Power Management Unit (PMU), the voltage Vbat output by the Power battery module is a fixed voltage, and the voltage VCC output by the Power supply module 202 is a variable voltage, and the voltage VCC output by the Power supply module 202 may be adjusted according to a Power supply mode (APT mode or ET mode) of the Power amplifier. It can be understood that, the present application makes the voltage value of the first power supply voltage and the voltage value of the second power supply voltage have a linear relationship by connecting through the voltage conversion circuit. Therefore, on the premise that the first supply voltage can be adjusted according to the power supply mode (APT mode or ET mode) of the power amplifier, the second supply voltage input to the power supply terminal of the second power amplifier 103 can also be adjusted according to the power supply mode (APT mode or ET mode) of the power amplifier.
In the embodiment of the invention, the power supply for the two power amplifiers in the power amplifier circuit is respectively realized through the voltage conversion circuit and the first power supply voltage, so that the load pressure of a power supply for providing the first power supply voltage is reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are further improved.
In some embodiments, a plurality of voltage conversion circuits 101 and a plurality of second power amplifiers 103 are respectively provided, and the number of the voltage conversion circuits 101 is equal to that of the second power amplifiers 103, and the voltage conversion circuits and the second power amplifiers are in one-to-one correspondence.
In some embodiments, the power supply terminal of the first power amplifier 102 is configured to receive the first power supply voltage, the power supply terminal of each of the voltage converting circuits 101 is configured to receive the preset voltage, the input terminal of each of the voltage converting circuits 101 is configured to receive the first power supply voltage, and the output terminal of each of the voltage converting circuits 101 outputs the second power supply voltage to the corresponding second power amplifier 103.
The embodiment of the invention can realize power supply to more than two power amplifiers, reduce the load pressure of the power supply providing the first power supply voltage, avoid oscillation caused by forming a power supply loop, and further improve the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit.
In a specific embodiment, as shown in fig. 3, the voltage conversion circuit 101 and the second power amplifier 103 are respectively provided with 2 voltage conversion circuits, a power supply terminal of the first power amplifier 102 receives the first power supply voltage, and power supply terminals of the 2 voltage conversion circuits 101 receive the preset voltage. Optionally, the preset voltage received by the power supply terminals of the 2 voltage conversion circuits 101 may be provided by the same battery power module, or may be provided by different battery power modules. The input ends of the 2 voltage conversion circuits 101 all receive the first power supply voltage, and the output ends of the 2 voltage conversion circuits 101 output the second power supply voltage to the corresponding second power amplifiers 103. It can be understood that the second supply voltages output by the 2 voltage conversion circuits 101 to the corresponding second power amplifiers 103 are all in a linear relationship with the first supply voltage. If the 2 voltage conversion circuits 101 are identical, the second supply voltages output by the 2 voltage conversion circuits 101 to the corresponding second power amplifiers 103 are identical. If the configuration of the 2 voltage converting circuits 101 is different, the second supply voltages output by the 2 voltage converting circuits 101 to the corresponding second power amplifiers 103 may be the same or different. That is, by configuring the voltage conversion circuit 101, a proportional value of the linear relationship between the second power supply voltage and the first power supply voltage can be adjusted.
In some embodiments, the power supply terminal of the first power amplifier 102 is configured to receive the first power supply voltage, and the power supply terminal of each of the voltage converting circuits 101 is configured to receive the preset voltage. Optionally, the preset voltage received by the power supply terminal of each voltage conversion circuit 101 may be provided by the same battery power module, or may be provided by different battery power modules. In every two adjacent voltage conversion circuits 101, an output end of a previous voltage conversion circuit 101 is connected with an input end of a next voltage conversion circuit 101, and an input end of a first voltage conversion circuit 101 is used for receiving the first supply voltage.
As an example, since the present embodiment includes a plurality of voltage conversion circuits 101 and a corresponding plurality of second power amplifiers 103. Therefore, in this embodiment, the input terminal of the first voltage converting circuit 101, which is disposed adjacent to the first power amplifier 102, is configured to receive the first supply voltage, that is, the second supply voltage output by the first voltage converting circuit 101 is in a linear relationship with the first supply voltage. Secondly, the input terminal of the second voltage converting circuit 101 is connected to the second power supply voltage output by the first voltage converting circuit 101, that is, the second power supply voltage output by the second voltage converting circuit 101 and the second power supply voltage output by the first voltage converting circuit 101 are in a linear relationship, and so on, in every two adjacent voltage converting circuits 101, the output terminal of the previous voltage converting circuit 101 is connected to the input terminal of the next voltage converting circuit 101, that is, the second power supply voltage output by the next voltage converting circuit 101 and the second power supply voltage output by the previous voltage converting circuit are in a linear relationship. In this embodiment, the voltage converting circuit 101 disposed adjacent to the first power amplifier 102 is used as the first voltage converting circuit 101, and the voltage converting circuit disposed farther from the first power amplifier 102 is the later voltage converting circuit.
The embodiment of the invention can also realize the power supply of more than two power amplifiers, reduce the load pressure of the power supply providing the first power supply voltage, and avoid the oscillation caused by forming a power supply loop, thereby improving the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit.
In a specific embodiment, as shown in fig. 4, the voltage conversion circuits 101 and the second power amplifiers 103 are respectively provided in 2, a power supply terminal of the first power amplifier 102 receives the first power supply voltage, power supply terminals of the 2 voltage conversion circuits 101 respectively receive the preset voltage, an output terminal of a previous voltage conversion circuit 101 is connected to an input terminal of a next voltage conversion circuit 101, and an input terminal of the first voltage conversion circuit 101 is configured to receive the first power supply voltage.
In some embodiments, the voltage conversion circuit 101 is configured to open-loop the preset voltage connected to the power amplifier circuit and a first power supply voltage connected to the power amplifier circuit. It should be noted that the preset voltage connected to the power amplifier circuit and the first power supply voltage connected to the power amplifier circuit are in an open loop state, that is, the preset voltage and the first power supply voltage are not communicated with each other, and a feedback loop cannot be formed.
According to the embodiment of the invention, the preset voltage connected with the power amplifier circuit and the first power supply voltage connected with the power amplifier circuit are in an open loop state, so that the preset voltage connected with the power amplifier circuit and the first power supply voltage connected with the power amplifier circuit can be prevented from oscillating due to the formation of a power supply loop between the preset voltage connected with the power amplifier circuit and the first power supply voltage connected with the power amplifier circuit, and further the stability and the power added efficiency of the power amplifier circuit are influenced.
In some embodiments, a first circuit schematic of the voltage conversion circuit 101 is shown in fig. 5. The voltage conversion circuit 101 comprises a first capacitor C IN A second capacitor C o A first field effect transistor Q 1 A second field effect transistor Q 2 Inductor L O And a pulse width modulator PWM, said first capacitor C IN The two ends of the first capacitor C are input ends of the voltage conversion circuit 101 IN Are also respectively connected with the first field effect transistor Q 1 And a first terminal of said pulse width modulator PWM, a second terminal of said pulse width modulator PWM being connected to said first field effect transistor Q 1 The third terminal of the pulse width modulator PWM is connected with the second field effect transistor Q 2 The second field effect transistor Q 2 Has a drain connected to the first field effect transistor Q 1 And the inductor L O Of said second field effect transistor Q 2 Source electrode of the first capacitor is connected with the second capacitor C o Of said second capacitor C o The other end is connected with the other end L of the inductor O Said second capacitance C o For converting said voltage into electricityThe output of the path 101. Wherein, in FIG. 5, the resistor R O Is a load resistor.
According to the embodiment of the invention, the second power supply voltage can be output according to the first power supply voltage, and the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relation, so that the situation that the first power supply voltage is singly used for supplying power to all power amplifiers can be avoided, the power supply pressure of a power supply for supplying the first power supply voltage is reduced, the oscillation caused by the formation of a power supply loop is avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of a power amplifier circuit are further improved.
In some embodiments, a second circuit schematic of the voltage conversion circuit 101 is shown in fig. 6. The voltage conversion circuit 101 includes a first resistor R 1 A second resistor R 2 Operational amplifier EA, third field effect transistor Q 3 And a third capacitance C a The first resistor R 1 Is connected to the first input of the operational amplifier EA and to the second resistor R 2 Said first resistance R 1 And the other end of the third field effect transistor Q 3 And said third capacitor C a Said third field effect transistor Q 3 Is the output terminal of the voltage conversion circuit 101, and the second input terminal of the operational amplifier EA is connected to the reference voltage V REF The output end of the operational amplifier EA is connected with the third field effect transistor Q 3 The third field effect transistor Q 3 Is the input terminal of the voltage conversion circuit 101, and the second resistor R 2 Is connected to the first resistor R 1 Of said second resistor R, said second resistor R 2 Is connected to the third capacitor C a And the other end of the same. Wherein, in FIG. 6, the resistance R L Is a load resistor.
The embodiment of the invention can also avoid singly using the first power supply voltage to supply power for all the power amplifiers, thereby not only reducing the power supply pressure of the power supply providing the first power supply voltage and avoiding the oscillation caused by forming a power supply loop, but also improving the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit.
In some embodiments, the first power amplifier 102 is connected in cascade with the second power amplifier 103, and an input of the first power amplifier 102 is connected to an output of the second power amplifier 103.
The embodiment of the invention can supply power to a circuit consisting of two cascade-connected power amplifiers, and under the condition, the load pressure of a power supply source for providing the first power supply voltage is reduced.
In some embodiments, a fourth circuit schematic of the power amplifier circuit is shown in fig. 7. The first power amplifier 102 and the second power amplifier 103 form a differential amplification circuit, and the first power amplifier 102 is configured to receive a first differential signal, amplify the first differential signal, and output a first differential amplified signal; the second power amplifier 103 is configured to receive a second differential signal, amplify the second differential signal, and output a second differential amplified signal, where a phase of the first differential signal differs from a phase of the second differential signal by 180 degrees.
According to the embodiment of the invention, the power supply can be supplied to the differential amplification circuit consisting of the two power amplifiers, and under the condition, the load pressure of the power supply source providing the first power supply voltage is reduced.
In some embodiments, the first power amplifier 102 is connected in cascade with the plurality of second power amplifiers 103, an output of the first power amplifier 102 is coupled to a signal output, an input of the first power amplifier 102 is connected to an output of a first second power amplifier 103, an input of a previous second power amplifier 103 is connected to an output of a next second power amplifier 103, and an input of a last second power amplifier 103 is coupled to a signal input.
The embodiment of the invention can supply power for a circuit consisting of more than two cascade-connected power amplifiers, and under the condition, the load pressure of a power supply source for providing the first power supply voltage is reduced.
In some embodiments, the first power amplifier 102 comprises at least one first amplifying transistor, the first amplifying transistor is a BJT transistor, a base of the first amplifying transistor is an input terminal of the first power amplifier 102, a collector of the first amplifying transistor is an output terminal of the first power amplifier 102, and an emitter of the first amplifying transistor is connected to a ground terminal; or, the first amplifying transistor is an MOS transistor, a gate of the first amplifying transistor is an input end of the first power amplifier 102, a source of the first amplifying transistor is an output end of the first power amplifier 102, and a drain of the first amplifying transistor is connected to a ground end;
the second power amplifier 103 comprises at least one second amplifying transistor, the second amplifying transistor is a BJT, a base of the second amplifying transistor is an input end of the second power amplifier 103, a collector of the second amplifying transistor is an output end of the second power amplifier 103, and an emitter of the second amplifying transistor is connected to a ground end; or, the second amplifying transistor is an MOS transistor, a gate of the second amplifying transistor is an input end of the second power amplifier 103, a source of the second amplifying transistor is an output end of the second power amplifier 103, and a drain of the second amplifying transistor is connected to a ground terminal.
In the power amplifier circuit provided by the embodiment of the present invention, the first power amplifier 102 receives a first supply voltage; enabling the voltage conversion circuit 101 to receive a preset voltage and the first power supply voltage, and outputting a second power supply voltage according to the first power supply voltage, so that the preset voltage supplies power to the voltage conversion circuit 101, wherein the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relationship; causing the second power amplifier 103 to receive a second supply voltage; therefore, the power supply pressure of a power supply of the power amplifier circuit can be reduced, the oscillation caused by the formation of a power supply loop can be avoided, and the stability, the power additional efficiency and the adjacent channel leakage ratio of the power amplifier circuit are improved.
As shown in fig. 8, the power amplifier device 200 of the embodiment of the present invention includes the power amplifier circuit 100 described in any one of the embodiments, and further includes a battery power module 201 and a power supply module 202, where the battery power module 201 is configured to provide the preset voltage Vbatt, and the power supply module 202 is configured to provide the first power supply voltage VCC, where the battery power module 201 may be a battery power module that supplies power to a bias transistor in a bias circuit, or may be an independent battery power module 201.
An embodiment of the present invention provides a radio frequency front end module, including the power amplifier circuit according to any embodiment.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express the preferred embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A power amplifier circuit comprising a voltage conversion circuit, a first power amplifier, and at least a second power amplifier connected to said first power amplifier;
the first power amplifier is used for receiving a first supply voltage;
the voltage conversion circuit is used for receiving a preset voltage and the first power supply voltage and outputting a second power supply voltage to the second power amplifier according to the first power supply voltage; the preset voltage is used for supplying power to the voltage conversion circuit, and the voltage value of the first power supply voltage and the voltage value of the second power supply voltage are in a linear relation.
2. The power amplifier circuit of claim 1, wherein the second power amplifier is configured as a single circuit, wherein the supply terminal of the first power amplifier is configured to receive the first supply voltage, the supply terminal of the voltage converting circuit is configured to receive the preset voltage, the input terminal of the voltage converting circuit is configured to receive the first supply voltage, and the output terminal of the voltage converting circuit is configured to output the second supply voltage to the supply terminal of the second power amplifier.
3. The power amplifier circuit according to claim 1, wherein a plurality of the voltage conversion circuits and a plurality of the second power amplifiers are provided, and the number of the voltage conversion circuits is equal to that of the second power amplifiers, and the voltage conversion circuits and the second power amplifiers correspond to each other one by one.
4. The power amplifier circuit of claim 3, wherein the supply terminal of the first power amplifier is configured to receive the first supply voltage, the supply terminal of each of the voltage converting circuits is configured to receive the preset voltage, the input terminal of each of the voltage converting circuits is configured to receive the first supply voltage, and the output terminal of each of the voltage converting circuits is configured to output the second supply voltage to the corresponding second power amplifier.
5. The power amplifier circuit of claim 3, wherein the supply terminal of the first power amplifier is configured to receive the first supply voltage, the supply terminal of each of the voltage converting circuits is configured to receive the preset voltage, the output terminal of a previous voltage converting circuit is connected to the input terminal of a next voltage converting circuit in every two adjacent voltage converting circuits, and the input terminal of a first voltage converting circuit is configured to receive the first supply voltage.
6. The power amplifier circuit of any of claims 2-5, wherein the voltage conversion circuit is configured to open-loop the predetermined voltage coupled to the power amplifier circuit and a first supply voltage coupled to the power amplifier circuit.
7. The power amplifier circuit of claim 1, wherein the voltage conversion circuit comprises a first capacitor, a second capacitor, a first field effect transistor, a second field effect transistor, an inductor, and a pulse width modulator, two ends of the first capacitor are input ends of the voltage conversion circuit, two ends of the first capacitor are further connected to a drain of the first field effect transistor and a first end of the pulse width modulator, respectively, a second end of the pulse width modulator is connected to a gate of the first field effect transistor, a third end of the pulse width modulator is connected to a gate of the second field effect transistor, a drain of the second field effect transistor is connected to a source of the first field effect transistor and one end of the inductor, a source of the second field effect transistor is connected to one end of the second capacitor, the other end of the second capacitor is connected to the other end of the inductor, and two ends of the second capacitor are output ends of the voltage conversion circuit.
8. The power amplifier circuit according to claim 1, wherein the voltage converting circuit comprises a first resistor, a second resistor, an operational amplifier, a third field effect transistor and a third capacitor, one end of the first resistor is connected to the first input terminal of the operational amplifier and one end of the second resistor, the other end of the first resistor is connected to the drain of the third field effect transistor and one end of the third capacitor, the drain of the third field effect transistor is the output terminal of the voltage converting circuit, the second input terminal of the operational amplifier is connected to a reference voltage, and the output terminal of the operational amplifier is connected to the third input terminal of the voltage converting circuitA gate of the field effect transistor, the third field effect transistor Q 3 The source of the voltage conversion circuit 101 is an input end of the voltage conversion circuit, one end of the second resistor is connected to one end of the first resistor, and the other end of the second resistor is connected to the other end of the third capacitor.
9. The power amplifier circuit of claim 2, wherein the first power amplifier is connected in cascade with the second power amplifier, an input of the first power amplifier being connected to an output of the second power amplifier.
10. The power amplifier circuit according to claim 2, wherein the first power amplifier and the second power amplifier constitute a differential amplifier circuit, and the first power amplifier is configured to receive a first differential signal, amplify the first differential signal, and output a first differential amplified signal; the second power amplifier is configured to receive a second differential signal, amplify the second differential signal, and output a second differential amplified signal, where a phase of the first differential signal differs from a phase of the second differential signal by 180 degrees.
11. The power amplifier circuit of claim 3, wherein the first power amplifier is cascaded with the plurality of second power amplifiers, an output of the first power amplifier is coupled to the signal output, an input of the first power amplifier is connected to an output of a first one of the second power amplifiers, an input of a previous one of the second power amplifiers is connected to an output of a subsequent one of the second power amplifiers, and an input of a last one of the second power amplifiers is coupled to the signal input.
12. The power amplifier circuit of claim 1, wherein the first power amplifier comprises at least one first amplifying transistor, the first amplifying transistor is a BJT, a base of the first amplifying transistor is an input terminal of the first power amplifier, a collector of the first amplifying transistor is an output terminal of the first power amplifier, and an emitter of the first amplifying transistor is connected to a ground terminal; or the first amplifying transistor is an MOS transistor, a gate of the first amplifying transistor is an input end of the first power amplifier, a source of the first amplifying transistor is an output end of the first power amplifier, and a drain of the first amplifying transistor is connected to a ground end;
the second power amplifier comprises at least one second amplifying transistor, the second amplifying transistor is a BJT (bipolar junction transistor), the base electrode of the second amplifying transistor is the input end of the second power amplifier, the collector electrode of the second amplifying transistor is the output end of the second power amplifier, and the emitter electrode of the second amplifying transistor is connected to the ground end; or, the second amplifying transistor is an MOS transistor, a gate of the second amplifying transistor is an input end of the second power amplifier, a source of the second amplifying transistor is an output end of the second power amplifier, and a drain of the second amplifying transistor is connected to a ground terminal.
13. A power amplifier arrangement comprising the power amplifier circuit of any one of claims 1-12, and further comprising a battery power supply module for providing the predetermined voltage, and a power supply module for providing the first supply voltage.
14. A radio frequency front end module comprising the power amplifier circuit of any one of claims 1-12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211634212.6A CN115913147A (en) | 2022-12-19 | 2022-12-19 | Power amplifier circuit, device and radio frequency front end module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211634212.6A CN115913147A (en) | 2022-12-19 | 2022-12-19 | Power amplifier circuit, device and radio frequency front end module |
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| US20040090267A1 (en) * | 2002-11-07 | 2004-05-13 | Hiroyuki Nagamori | High-frequency power amplification electronic part and wireless communication system |
| CN1925318A (en) * | 2005-08-31 | 2007-03-07 | 株式会社瑞萨科技 | High-frequency power amplifier |
| CN103376811A (en) * | 2012-04-12 | 2013-10-30 | 联发科技股份有限公司 | Power module |
| US20160241197A1 (en) * | 2015-02-15 | 2016-08-18 | Skyworks Solutions, Inc. | Power amplification system with variable supply voltage |
| CN109314496A (en) * | 2016-03-14 | 2019-02-05 | 美国亚德诺半导体公司 | Active linear for broad band amplifier |
| CN113037222A (en) * | 2021-02-26 | 2021-06-25 | 广州慧智微电子有限公司 | Biasing circuit and amplifier |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040090267A1 (en) * | 2002-11-07 | 2004-05-13 | Hiroyuki Nagamori | High-frequency power amplification electronic part and wireless communication system |
| CN1925318A (en) * | 2005-08-31 | 2007-03-07 | 株式会社瑞萨科技 | High-frequency power amplifier |
| CN103376811A (en) * | 2012-04-12 | 2013-10-30 | 联发科技股份有限公司 | Power module |
| US20160241197A1 (en) * | 2015-02-15 | 2016-08-18 | Skyworks Solutions, Inc. | Power amplification system with variable supply voltage |
| CN109314496A (en) * | 2016-03-14 | 2019-02-05 | 美国亚德诺半导体公司 | Active linear for broad band amplifier |
| CN113037222A (en) * | 2021-02-26 | 2021-06-25 | 广州慧智微电子有限公司 | Biasing circuit and amplifier |
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