CN111555763A - Power amplifier module and wireless device - Google Patents
Power amplifier module and wireless device Download PDFInfo
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- CN111555763A CN111555763A CN202010386513.6A CN202010386513A CN111555763A CN 111555763 A CN111555763 A CN 111555763A CN 202010386513 A CN202010386513 A CN 202010386513A CN 111555763 A CN111555763 A CN 111555763A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
Abstract
The invention discloses a power amplifier module and a wireless device, which are applied to the technical field of radio frequency circuits and used for solving the problem of low integration level of the power amplifier module. The power amplifier module includes a power amplifier, and an adjustable LC network connected to an input of the power amplifier; the adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network, and the capacitance value of the adjustable capacitor network access circuit and the inductance value of the adjustable inductor network access circuit can be controlled by changing the configuration of the switch. The phase compensation and the harmonic filtering of the power amplifier can be realized through an adjustable LC network, the number and the occupied space of circuit devices adopted by the power amplifier module are smaller, and the integration level and the miniaturization of the power amplifier module are favorably improved.
Description
Technical Field
The present invention relates to the field of radio frequency circuits, and more particularly, to a power amplifier module and a wireless device.
Background
For an ideal amplifier, the phase characteristic is a constant that does not vary with frequency and power. In the case of an actual circuit, it is,such ideal phase characteristics are not present because of the presence of nonlinear parasitic parameters, and parasitic capacitances between the input and output terminals of the transistors are the main factors affecting the phase characteristics. The transistor may be a MOS transistor or a BJT transistor, illustratively, a parasitic capacitance C between a base and a collector of the BJT transistorbcIs a major factor affecting the phase characteristics. It can be expressed by the formula (1 + A) × CbcEquivalent to a capacitance at the input. And A is the amplification factor of the triode. It can be seen that there are two variables that affect the phase characteristics: parasitic capacitance CbcAnd an amplification factor a. This equivalent formula is called Miller effect, parasitic capacitance CbcThe power amplifier is variable with frequency and power, and under the condition that the load impedance of the triode is constant, the amplification factor A is mainly determined by the output impedance and the output current of the current source signal and is not variable with frequency. In a conventional processing mode, a parasitic capacitance C is usually cancelled by connecting a capacitor in parallel at an input end of the power amplifierbcThe influence of (c).
In some switching mode power amplifiers, such as class E, F-1, or J power amplifiers, a resonant circuit structure is required to filter out some harmonics of the output current, so that the output current or voltage only maintains the required frequency components.
Because many factors need to be considered in designing the power amplifier, the circuit structure of the conventional power amplifier module is more and more complex, and the number of circuit devices is increased, so that the integration level of the power amplifier module is low, and the miniaturization of the power amplifier module in application is not facilitated.
Disclosure of Invention
The embodiment of the invention provides a power amplifier module and a wireless device, aiming at solving the problem of low integration level of the power amplifier module.
The invention provides a power amplifier module, comprising a power amplifier and an adjustable LC network connected to the input end of the power amplifier;
the adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network;
the adjustable capacitor network comprises more than two capacitors and more than one switch, and the capacitance value of the adjustable capacitor network access circuit is controlled by changing the configuration of the switches in the adjustable capacitor network;
the adjustable inductance network comprises more than two inductors and more than one switch, and the inductance value of the adjustable inductance network access circuit is controlled by changing the configuration of the switches in the adjustable inductance network.
Optionally, the power amplifier module performs the following steps when operating: the method comprises the steps of obtaining the current working frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation, changing the configuration of a switch in the adjustable LC network to enable the adjustable LC network to be connected into a circuit through the target capacitance value and the target inductance value, and achieving phase compensation and harmonic filtering of the power amplifier together, wherein the preset compensation relation records the corresponding relation between the working frequency of the power amplifier and the capacitance value and the inductance value of the adjustable LC network.
Optionally, the preset compensation relationship is predetermined by:
determining respective operating frequencies of the power amplifier;
determining capacitance values of the adjustable LC network to be accessed to a circuit and compensating the influence of parasitic capacitance on phase characteristics under different working frequencies of the power amplifier to obtain the corresponding relation between each working frequency of the power amplifier and the capacitance value of the adjustable LC network;
respectively substituting the determined capacitance values of the adjustable LC network access circuit into a preset first formula for calculation under different working frequencies of the power amplifier to obtain inductance values of the adjustable LC network access circuit, which can resonate at a resonance frequency to filter harmonic waves, and obtain corresponding relations between the working frequencies of the power amplifier and the inductance values of the adjustable LC network;
the preset first formula is as follows:
wherein f isnIs referred to as the operating frequency, 2fnIs a resonant frequency, CfnIs the capacitance value, L, of the circuit to which the adjustable LC network should be connected under fnfnIs at fnThe adjustable LC network should be switched in to the inductance value of the circuit.
Optionally, the power amplifier module further comprises a controller;
the controller is configured to: obtaining the current working frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation, and changing the configuration of a switch in the adjustable LC network to enable the adjustable LC network to access a circuit according to the target capacitance value and the target inductance value.
Optionally, the adjustable capacitance network is composed of a fixed capacitance circuit part and a variable capacitance circuit part, wherein the variable capacitance circuit part is composed of more than one group of capacitors with switches.
Optionally, the adjustable inductor network is composed of a fixed inductor circuit part and a variable inductor circuit part, wherein the variable inductor circuit part is composed of more than one set of switched inductors.
Optionally, the power amplifier is a multi-stage power amplifier;
the adjustable LC network is arranged at the input end of an output stage power amplifying tube in the multi-stage power amplifier, or the adjustable LC network is arranged at the output end of an input stage power amplifying tube in the multi-stage power amplifier.
Optionally, the power amplifier is a multi-stage power amplifier;
the adjustable LC network comprises more than two groups of adjustable capacitor networks and adjustable inductance networks, and the input ends or the output ends of more than two power amplifying tubes in the multistage power amplifier are respectively provided with one group of adjustable capacitor networks and one group of adjustable inductance networks.
Optionally, the power amplifier module further comprises an output impedance matching network in electrical communication with the output of the power amplifier.
The present invention also provides a wireless device including a load line and a power amplifier module having an output terminal connected to the load line;
the power amplifier module comprises a power amplifier and an adjustable LC network connected to an input of the power amplifier;
the adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network;
the adjustable capacitor network comprises more than two capacitors and more than one switch, and the capacitance value of the adjustable capacitor network access circuit is controlled by changing the configuration of the switches in the adjustable capacitor network;
the adjustable inductance network comprises more than two inductors and more than one switch, and the inductance value of the adjustable inductance network access circuit is controlled by changing the configuration of the switches in the adjustable inductance network.
The power amplifier module provided by the invention can realize phase compensation and harmonic filtering of the power amplifier through an adjustable LC network, and the number and the occupied space of circuit devices adopted by the power amplifier module are smaller, thereby being beneficial to improving the integration level and the miniaturization of the power amplifier module.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a circuit diagram of a first example of a power amplifier module of the present invention;
FIG. 2 is a circuit diagram of an example of an adjustable capacitance network of the present invention;
FIG. 3 is a circuit diagram of another example of an adjustable capacitance network of the present invention;
FIG. 4 is a circuit diagram of an example of an adjustable inductor network of the present invention;
FIG. 5 is a circuit diagram of another example of an adjustable inductor network of the present invention;
fig. 6 is a circuit diagram of a second example of a power amplifier module of the present invention;
fig. 7 is a circuit diagram of a third example of a power amplifier module of the present invention;
fig. 8 is a circuit diagram of a fourth example of a power amplifier module of the present invention;
fig. 9 is a circuit diagram of a fifth example of a power amplifier module of the present invention;
fig. 10 is a circuit diagram of a sixth example of a power amplifier module of the present invention;
fig. 11 is a circuit diagram of a seventh example of a power amplifier module of the present invention;
FIG. 12 is a circuit diagram of an example of a wireless device of the present invention;
fig. 13 is a circuit diagram of another example of a wireless device of the present invention.
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 some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To increase the efficiency of the power amplifier while maintaining good linearity, many designers of linear power amplifiers employ class F and inverse class F power amplifiers. However, as mentioned in the background, maintaining operation of class F and inverse class F power amplifiers often requires the use of harmonic terminations at the output of the power amplifier; in addition, in order to cancel the influence of the parasitic capacitance on the phase characteristics, it is generally necessary to connect a capacitor in parallel to the input terminal of the power amplifier. The circuit structure of the conventional power amplifier module is more and more complicated due to the requirements of a plurality of factors, and the number of circuit devices is increased, which is not favorable for the miniaturization of the power amplifier module in application.
Therefore, the power amplifier module provided by the embodiment of the invention can realize phase compensation and harmonic filtering of the power amplifier through an adjustable LC network, and the power amplifier module provided by the embodiment of the invention has smaller number of circuit devices and occupied space, thereby being beneficial to improving the integration level and miniaturization of the power amplifier module.
Fig. 1 is a circuit diagram of an example of a power amplifier module of the present invention. The power amplifier module comprises a power amplifier 101 and a tunable LC network 102 connected to an input of said power amplifier 101. In the example of fig. 1, the tunable LC network 102 is connected to the input of the power amplifier 101, and optionally, an inductor may be connected to the collector of the power amplifier 101.
The tunable LC network 102 includes a first tunable network and a second tunable network, where the first tunable network is a tunable capacitor network and the second tunable network is a tunable inductor network, or the first tunable network is a tunable inductor network and the second tunable network is a tunable capacitor network. The tunable LC network 102 is thus composed of at least one tunable capacitance network and at least one tunable inductance network, and by changing the capacitance and inductance values in the tunable LC network 102 for a particular operating frequency, the phase characteristics of the power amplifier 101 can be improved and act as a harmonic network for the power amplifier 101.
In the tunable LC network 102, the tunable capacitance network includes two or more capacitors and one or more switches, and the capacitance value of the tunable capacitance network access circuit is controlled by changing the configuration of the switches in the tunable capacitance network. Specifically, the tunable capacitor network may be composed of a plurality of capacitors with switches, as shown in fig. 2, each capacitor in the tunable capacitor network has an independent switch, and the capacitance of the access circuit of the tunable capacitor network can be controlled by changing the configuration (on/off) of the switches. Alternatively, in some cases, to reduce the number of switches, the tunable capacitance network may be comprised of a fixed capacitance circuit portion and a variable capacitance circuit portion, wherein the variable capacitance circuit portion is comprised of more than one set of switched capacitors. As shown in fig. 3, the tunable capacitor network includes a part of capacitors fixedly connected to the circuit and a part of capacitors with switches, that is, a fixed capacitor circuit portion and a variable capacitor circuit portion, and this structure can ensure that the tunable capacitor network is tunable within a certain capacitance range, and can also effectively reduce the number of switch components, which is beneficial to improving the integration level of the power amplifier module.
In the tunable LC network 102, the tunable inductance network includes two or more inductors and one or more switches, and the inductance value of the tunable inductance network access circuit is controlled by changing the configuration of the switches in the tunable inductance network. Specifically, the adjustable inductor network may be composed of a plurality of sets of inductors with switches, as shown in fig. 4, each inductor in the adjustable inductor network has an independent switch, and the inductance value of the adjustable inductor network connected to the circuit can be controlled by changing the configuration (on/off) of the switches. Alternatively, in some cases, to reduce the number of switches, the adjustable inductor network may be comprised of a fixed inductor circuit portion and a variable inductor circuit portion, wherein the variable inductor circuit portion is comprised of more than one set of switched inductors. As shown in fig. 5, the adjustable inductor network includes a part of inductors fixedly connected to the circuit and a part of inductors with switches, that is, a fixed inductor circuit portion and a variable inductor circuit portion, and this structure can ensure that the adjustable inductor network is adjustable within a certain inductance value range, and can effectively reduce the number of switch components, which is beneficial to improving the integration level of the power amplifier module.
Illustratively, in some embodiments, as shown in fig. 6, the tunable LC network 102 is composed of a tunable capacitor network and a tunable inductor network, wherein the tunable capacitor network is composed of a plurality of sets of capacitors with switches, and the tunable inductor network is composed of a plurality of sets of inductors with switches, and the capacitance and inductance of the access circuit of the tunable LC network 102 can be controlled and adjusted within a certain range by changing the configurations of the switches on the tunable capacitor network and the tunable inductor network.
It will be appreciated that in some applications, the power amplifier needs to be switched between different operating frequencies, in which the parasitic capacitance varies with the operating frequency and power, and the generation of harmonics is also related to the operating frequency. Based on this, in the embodiment of the present invention, the capacitance and the inductance of the adjustable LC network 102 to be connected to the circuit may be set in advance for different operating frequencies of the power amplifier, so that the capacitance and the inductance of the adjustable LC network 102 may be changed according to different operating frequencies when necessary, so that the adjustable LC network 102 can play a role in phase compensation and harmonic filtering in the power amplifier module.
Specifically, the corresponding relationship between different operating frequencies of the power amplifier and the capacitance and inductance of the tunable LC network 102 is predetermined, and in this embodiment, is recorded as a preset compensation relationship. For example, the power amplifier operates at two operating frequencies f1And f2Wherein the capacitance values of the tunable LC network 102 are determined to correspond to C, respectively, by a predetermined measurementf1And Cf2Inductance values respectively corresponding to Lf1And Lf2The phase compensation and the harmonic filtering of the power amplifier can be realized, and the preset compensation relationship in the application scene can be recorded as:
thus, the power amplifier operates at different operating frequencies fnThe capacitance value corresponding to the tunable LC network 102 is CfnInductance value of LfnThe preset compensation relationship is recorded as: f. ofn-Cfn-Lfn。
Based on the preset compensation relationship, the power amplifier module executes the following steps when in work:
s11, acquiring the current working frequency of the power amplifier; s12, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation; s13, changing the configuration of the switches in the tunable LC network 102 so that the tunable LC network 102 accesses the circuit with the target capacitance value and the target inductance value, and performs the phase compensation and the harmonic filtering for the power amplifier.
For the above steps S11-S13, assume that the acquired current operating frequency of the power amplifier is f1Then by presetting the compensation relation "f1- Cf1- Lf1", the current operating frequency f can be determined1The corresponding target capacitance and target inductance are respectively Cf1And Lf1Therefore, the switch configuration of the tunable capacitor network and the switch configuration of the tunable inductor network in the tunable LC network 102 may be specifically changed such that the capacitance value of the tunable capacitor network access circuit is Cf1The capacitance value of the adjustable inductance network access circuit is Lf1. Due to the predetermined compensation relation "f1- Cf1- Lf1"is determined on the premise that the tunable LC network 102 can achieve phase compensation and harmonic filtering of the power amplifier, and therefore, in the practical application process, the working frequency f1The target capacitance and inductance are adjusted to Cf1And Lf1Naturally, the operating frequency f can also be matched1The lower power amplifier serves the functions of phase compensation and harmonic filtering.
Similarly, assume that the obtained current operating frequency of the power amplifier is f2Then by presetting the compensation relation "f2- Cf2- Lf2", the current operating frequency f can be determined2The corresponding target capacitance and target inductance are respectively Cf2And Lf2Therefore, the switch configuration of the tunable capacitor network and the switch configuration of the tunable inductor network in the tunable LC network 102 may be specifically changed such that the capacitance value of the tunable capacitor network access circuit is Cf2The capacitance value of the adjustable inductance network access circuit is Lf2Can also be tuned to the operating frequency f2The lower power amplifier serves the functions of phase compensation and harmonic filtering.
Preferably, in some embodiments, the power amplifier module may further include a controller configured to perform the above steps S11-S13, that is, obtaining a current operating frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and changing the configuration of the switches in the adjustable LC network 102 so that the adjustable LC network 102 accesses the circuit with the target capacitance value and the target inductance value. By the controller independently controlling and executing steps S11-S13, the stability of the power amplifier module in changing the configuration of the switches in the tunable LC network 102 when switching the operating frequency can be improved, and the response speed and robustness of the power amplifier module can be improved.
In some embodiments, the predetermined compensation relationship is predetermined by:
s21, determining each working frequency of the power amplifier; s22, determining capacitance values of the adjustable LC network 102 that should be connected to the circuit and compensate for the influence of the parasitic capacitance on the phase characteristics when the power amplifier is at different operating frequencies, to obtain a corresponding relationship between each operating frequency of the power amplifier and the capacitance value of the adjustable LC network 102;
and S23, respectively substituting the determined capacitance values of the adjustable LC network 102 to be connected into the circuit into a preset first formula for calculation when the power amplifier is at different working frequencies, so as to obtain inductance values of the adjustable LC network 102 to be connected into the circuit, which can resonate at a resonant frequency to filter harmonic waves, and obtain the corresponding relation between each working frequency of the power amplifier and the inductance value of the adjustable LC network 102.
For step S21, specifically, the operating frequency f of the power amplifier may be determined first1、f2、……、fnWherein n is greater than or equal to 2. It is understood that, it is generally necessary to determine various operating frequencies that may exist in the power amplifier module under a specified circuit environment, for example, if the power amplifier module is applied to an antenna module, the operating frequencies that may exist in the power amplifier module when the antenna module operates in a specific application scenario should be considered, and then the operating frequencies are determined.
With respect to step S22, it is understood that, in order to measure the capacitance and inductance values corresponding to different operating frequencies, the measurement may be performed at each operating frequencyNext, the capacitance value of the adjustable LC network 102 to be connected to the circuit and compensating for the influence of the parasitic capacitance on the phase characteristic is determined through an experimental or simulation method. For example, the power amplifier is first brought to the operating frequency f1Then determining C by means of simulationf1. In the same way, let the power amplifier at the working frequency f2Then determining C by means of simulationf2。
For step S23, after determining the corresponding capacitance value at a certain operating frequency in step S22, the inductance value required for the harmonic wave can be determined according to the determined capacitance value. Illustratively, in a class F power amplifier, a high quality factor parallel resonant network resonates at a resonant frequency, raising an infinite impedance at the fundamental frequency, while at other harmonic frequencies the impedance of the parallel resonant network is approximately zero. Therefore, the inductance value in the harmonic network can be calculated by the following formula (preset first formula):
the preset first formula is as follows:
wherein f isnIs referred to as the operating frequency, 2fnIs a resonant frequency, CfnIs at fnThe capacitance value, L, of the circuit to which the tunable LC network 102 should be connectedfnIs at fnThe tunable LC network 102 should switch in the inductance value of the circuit.
I.e. at the operating frequency f of the power amplifier1Then, f is1And Cf1Substituting into the preset first formula to obtain Lf1(ii) a At the operating frequency f of the power amplifier2Then, f is2And Cf2Substituting into the preset first formula to obtain Lf2. Similarly, the capacitance and inductance of the adjustable LC network 102 at each operating frequency of the power amplifier may be obtained, so as to construct a corresponding relationship between each operating frequency of the power amplifier and the capacitance and inductance of the adjustable LC network 102, that is, the preset compensation relationship may be predetermined.
Preferably, in some embodiments, the power amplifier is a multi-stage power amplifier. In this case, the tunable LC network 102 may be disposed at an input end of an output stage power amplifier tube in the multi-stage power amplifier, or the tunable LC network 102 may be disposed at an output end of an input stage power amplifier tube in the multi-stage power amplifier. For example, as shown in fig. 7, the tunable LC network 102 may be disposed at an input end of an output stage power amplifying tube 103 in the multi-stage power amplifier; as shown in fig. 8, the tunable LC network 102 may be disposed at an output terminal of an output stage power amplifying tube 103 in the multi-stage power amplifier.
Furthermore, when the power amplifier is a multi-stage power amplifier, the tunable LC network 102 may further include two or more sets of tunable capacitor networks and tunable inductor networks, where a set of tunable capacitor networks and a set of tunable inductor networks are respectively disposed at input ends or output ends of two or more power amplifier tubes in the multi-stage power amplifier. Illustratively, as shown in fig. 9, one set of tunable capacitor network and tunable inductor network 102-1 is disposed at the output of the input stage power amplifier tube 104, and another set of tunable capacitor network and tunable inductor network 102-2 is disposed at the output of the output stage power amplifier tube 103.
Preferably, in some embodiments, the power amplifier module further comprises an output impedance matching network in electrical communication with the output of the power amplifier to meet the need to match the impedance of a load line that may be accessed, as shown in fig. 10.
Preferably, the power amplifier module provided by the invention can also be used for carrying out structural extension on a class F power amplifier. As shown in fig. 11, in the application of the class F power amplifier, a set of adjustable capacitor network and adjustable inductor network 102-3 is disposed in the input end of the output stage power amplifier to present a 2-step low impedance, and a set of adjustable capacitor network and adjustable inductor network 102-4 is disposed in the output end of the output stage power amplifier to present a 3-step high impedance. Similarly, the power amplifier module provided by the invention can also perform structural expansion on the inverse F-type power amplifier. Referring to fig. 11, in an application of the inverse class F power amplifier, a set of adjustable capacitor network and adjustable inductor network is disposed in an input end of the output stage power amplifier to present a low impedance of 3 steps, and a set of adjustable capacitor network and adjustable inductor network is disposed in an output end of the output stage power amplifier to present a high impedance of 2 steps.
It can be known from the above embodiments that the power amplifier module according to the present invention can implement phase compensation and harmonic filtering for the power amplifier through an adjustable LC network 102, and different from the prior art that requires phase compensation and harmonic filtering one by one, the power amplifier module according to the present invention has a smaller number of circuit devices and a smaller occupied space, which is beneficial to improve the integration level and miniaturization of the power amplifier module.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In another aspect, as shown in fig. 12, the present invention also relates to a wireless device including a load line and the power amplifier module described in any of the above embodiments with an output terminal connected to the load line. In the wireless device, the power amplifier module includes at least a rate amplifier, and an adjustable LC network connected to an input of the power amplifier.
The adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network;
the adjustable capacitor network comprises more than two capacitors and more than one switch, and the capacitance value of the adjustable capacitor network access circuit is controlled by changing the configuration of the switches in the adjustable capacitor network;
the adjustable inductance network comprises more than two inductors and more than one switch, and the inductance value of the adjustable inductance network access circuit is controlled by changing the configuration of the switches in the adjustable inductance network.
Wherein, the power amplifier module can execute the following steps when working: the method comprises the steps of obtaining the current working frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation, changing the configuration of a switch in the adjustable LC network to enable the adjustable LC network to be connected into a circuit through the target capacitance value and the target inductance value, and achieving phase compensation and harmonic filtering of the power amplifier together, wherein the preset compensation relation records the corresponding relation between the working frequency of the power amplifier and the capacitance value and the inductance value of the adjustable LC network.
It is to be understood that the power amplifier module in the wireless device is not limited to any one of the power amplifier modules mentioned in the embodiments of the present invention, and therefore, the technical features and the expected technical effects of the power amplifier module described in the embodiments above are also provided in the wireless device, and are not described herein again.
Preferably, as shown in fig. 13, the wireless device may include two or more load lines, and may further include a switch network 105 configured to electrically connect one of the two or more load lines to the output terminal of the power amplifier module.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A power amplifier module comprising a power amplifier, and an adjustable LC network connected to an input of the power amplifier;
the adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network;
the adjustable capacitor network comprises more than two capacitors and more than one switch, and the capacitance value of the adjustable capacitor network access circuit is controlled by changing the configuration of the switches in the adjustable capacitor network;
the adjustable inductance network comprises more than two inductors and more than one switch, and the inductance value of the adjustable inductance network access circuit is controlled by changing the configuration of the switches in the adjustable inductance network.
2. The power amplifier module of claim 1, wherein the power amplifier module is operative to perform the steps of: the method comprises the steps of obtaining the current working frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation, changing the configuration of a switch in the adjustable LC network to enable the adjustable LC network to be connected into a circuit through the target capacitance value and the target inductance value, and achieving phase compensation and harmonic filtering of the power amplifier together, wherein the preset compensation relation records the corresponding relation between the working frequency of the power amplifier and the capacitance value and the inductance value of the adjustable LC network.
3. The power amplifier module of claim 2, wherein the predetermined compensation relationship is predetermined by:
determining respective operating frequencies of the power amplifier;
determining capacitance values of the adjustable LC network to be accessed to a circuit and compensating the influence of parasitic capacitance on phase characteristics under different working frequencies of the power amplifier to obtain the corresponding relation between each working frequency of the power amplifier and the capacitance value of the adjustable LC network;
respectively substituting the determined capacitance values of the adjustable LC network access circuit into a preset first formula for calculation under different working frequencies of the power amplifier to obtain inductance values of the adjustable LC network access circuit, which can resonate at a resonance frequency to filter harmonic waves, and obtain corresponding relations between the working frequencies of the power amplifier and the inductance values of the adjustable LC network;
the preset first formula is as follows:
wherein f isnIs referred to as the operating frequency, 2fnIs a resonant frequency, CfnIs at fnCapacitance value L of the adjustable LC network to be connected into the circuitfnIs at fnThe adjustable LC network should be switched in to the inductance value of the circuit.
4. The power amplifier module of claim 1, further comprising a controller;
the controller is configured to: obtaining the current working frequency of the power amplifier, determining a target capacitance value and a target inductance value corresponding to the current working frequency according to a preset compensation relation, and changing the configuration of a switch in the adjustable LC network to enable the adjustable LC network to access a circuit according to the target capacitance value and the target inductance value.
5. The power amplifier module of claim 1 wherein the tunable capacitance network is comprised of a fixed capacitance circuit portion and a variable capacitance circuit portion, wherein the variable capacitance circuit portion is comprised of more than one set of switched capacitors.
6. The power amplifier module of claim 1, wherein the adjustable inductor network is comprised of a fixed inductor circuit portion and a variable inductor circuit portion, wherein the variable inductor circuit portion is comprised of more than one set of switched inductors.
7. The power amplifier module of claim 1, wherein the power amplifier is a multi-stage power amplifier;
the adjustable LC network is arranged at the input end of an output stage power amplifying tube in the multi-stage power amplifier, or the adjustable LC network is arranged at the output end of an input stage power amplifying tube in the multi-stage power amplifier.
8. The power amplifier module of claim 1, wherein the power amplifier is a multi-stage power amplifier;
the adjustable LC network comprises more than two groups of adjustable capacitor networks and adjustable inductance networks, and the input ends or the output ends of more than two power amplifying tubes in the multistage power amplifier are respectively provided with one group of adjustable capacitor networks and one group of adjustable inductance networks.
9. The power amplifier module of any of claims 1 through 8, further comprising an output impedance matching network in electrical communication with an output of the power amplifier.
10. A wireless device comprising a load line and a power amplifier module according to any one of claims 1 to 9 having an output connected to the load line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386513.6A CN111555763B (en) | 2020-05-09 | 2020-05-09 | Power amplifier module and wireless device |
| PCT/CN2020/109031 WO2021227281A1 (en) | 2020-05-09 | 2020-08-14 | Power amplifier module and wireless device |
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| CN202010386513.6A CN111555763B (en) | 2020-05-09 | 2020-05-09 | Power amplifier module and wireless device |
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| CN111555763A true CN111555763A (en) | 2020-08-18 |
| CN111555763B CN111555763B (en) | 2021-01-08 |
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| CN114785297A (en) * | 2022-04-18 | 2022-07-22 | 深圳飞骧科技股份有限公司 | Power amplifier and input matching network thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040150483A1 (en) * | 2003-01-30 | 2004-08-05 | Je-Kwang Cho | Voltage controlled oscillators with selectable oscillation frequencies and methods for adjusting the same |
| US20050200426A1 (en) * | 2004-03-12 | 2005-09-15 | Castaneda Jesus A. | Off-chip LC circuit for lowest ground and VDD impedance for power amplifier |
| CN105656436A (en) * | 2016-03-30 | 2016-06-08 | 武汉芯泰科技有限公司 | CMOS power amplifier matching circuit |
| CN108011600A (en) * | 2017-09-08 | 2018-05-08 | 牛旭 | A kind of restructural radio frequency and microwave power amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201726362U (en) * | 2010-04-30 | 2011-01-26 | 苏州英诺迅科技有限公司 | Circuit structure for improving linearity and PAE of power amplifier |
| CN101888214A (en) * | 2010-04-30 | 2010-11-17 | 苏州英诺迅科技有限公司 | Cascode power amplifier with improved efficiency and linearity |
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2020
- 2020-05-09 CN CN202010386513.6A patent/CN111555763B/en active Active
- 2020-08-14 WO PCT/CN2020/109031 patent/WO2021227281A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040150483A1 (en) * | 2003-01-30 | 2004-08-05 | Je-Kwang Cho | Voltage controlled oscillators with selectable oscillation frequencies and methods for adjusting the same |
| US20050200426A1 (en) * | 2004-03-12 | 2005-09-15 | Castaneda Jesus A. | Off-chip LC circuit for lowest ground and VDD impedance for power amplifier |
| CN105656436A (en) * | 2016-03-30 | 2016-06-08 | 武汉芯泰科技有限公司 | CMOS power amplifier matching circuit |
| CN108011600A (en) * | 2017-09-08 | 2018-05-08 | 牛旭 | A kind of restructural radio frequency and microwave power amplifier |
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| WO2021227281A1 (en) | 2021-11-18 |
| CN111555763B (en) | 2021-01-08 |
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Denomination of invention: Power amplifier module and wireless device Effective date of registration: 20210629 Granted publication date: 20210108 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: AN ADVANCED RF POWER AMPLIFIER AND COMMUNICATION DEVICE Registration number: Y2021440020045 |
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Address after: 518000 room 2001, building 3, Shenzhen new generation industrial park, 136 Zhongkang Road, Meidu community, Meilin street, Futian District, Shenzhen City, Guangdong Province Patentee after: Ruishi Chuangxin (Shenzhen) Technology Co.,Ltd. Address before: 518000 508, building 541, Bagualing Industrial Zone, 23 Bagualing 6th Street, Hualin community, Yuanling street, Futian District, Shenzhen City, Guangdong Province Patentee before: AN ADVANCED RF POWER AMPLIFIER AND COMMUNICATION DEVICE |
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Date of cancellation: 20221103 Granted publication date: 20210108 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: AN ADVANCED RF POWER AMPLIFIER AND COMMUNICATION DEVICE Registration number: Y2021440020045 |