CN117998551A

CN117998551A - Wireless communication device and electronic apparatus

Info

Publication number: CN117998551A
Application number: CN202410213308.8A
Authority: CN
Inventors: 朱继宏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2024-02-26
Filing date: 2024-02-26
Publication date: 2024-05-07

Abstract

The application provides a wireless communication device and an electronic device, wherein the device comprises an envelope tracking module, a first PA and a second PA; the first PA output end is electrically connected with the input end of the second PA; the first PA is used for amplifying the power of the input first signal, and the second PA is used for amplifying the power of the amplified first signal output by the first PA; the second PA power supply end is electrically connected with the first end of the envelope tracking module, and the envelope tracking module is used for providing working voltage for the second PA according to envelope information of the second signal; the second signal is the first signal or a baseband signal of the first signal; the first PA power supply end is electrically connected with the first end of the envelope tracking module through the first filtering module, the first filtering module is used for attenuating high-frequency components in feedback signals of the second PA, and the envelope tracking module is used for providing working voltage for the first PA according to envelope information of the second signal; or the first PA power supply terminal is not electrically connected to the first end of the envelope tracking module, and the voltage of the first PA power supply terminal is a fixed voltage.

Description

Wireless communication device and electronic apparatus

Technical Field

The present application relates to the field of electronic communications, and relates to, but is not limited to, a wireless communication device and an electronic apparatus.

Background

The smart phone has more and more powerful functions and larger power consumption, and the improvement of the battery endurance time is a consistent target of all mobile phone manufacturers. There are two Power saving techniques of Power Amplifier (PA) commonly used in mobile phones, one is average Power tracking (Average Power Tracking, APT) technique and the other is envelope tracking (Envelope Tracking, ET) technique. Since ET technology can fine tune PA power supplies, it is becoming an important point of industry research.

Disclosure of Invention

The wireless communication device and the electronic equipment provided by the application can solve the problem of self-excited oscillation of the PA, thereby improving the stability of the PA.

In a first aspect, an embodiment of the present application provides a wireless communication apparatus, the apparatus including an envelope tracking module, a first PA, and a second PA; the output end of the first PA is electrically connected with the input end of the second PA; the first PA is used for amplifying the power of the input first signal, and the second PA is used for amplifying the power of the amplified first signal output by the first PA; the power supply end of the second PA is electrically connected with the first end of the envelope tracking module, and the envelope tracking module is used for providing working voltage for the second PA according to envelope information of a second signal; wherein the second signal is the first signal or a baseband signal of the first signal; the power supply end of the first PA is electrically connected with the first end of the envelope tracking module through a first filtering module, the first filtering module is used for attenuating high-frequency components in feedback signals of the second PA, and the envelope tracking module is used for providing working voltage for the first PA according to envelope information of the second signals; or the power supply end of the first PA is not electrically connected with the first end of the envelope tracking module, and the voltage of the power supply end of the first PA is a fixed voltage.

In a second aspect, an embodiment of the present application provides an electronic device, where the device includes the wireless communication apparatus according to the first aspect.

In the embodiment of the application, a wireless communication device is provided, in which, in order to solve the problem of PA self-excited vibration caused by high-frequency components in feedback signals of a second PA flowing into a power supply end of a first PA through the power supply end of the second PA in ET technology, a first filtering module is added between an envelope tracking module and the first PA, and is used for attenuating the high-frequency components in the feedback signals of the second PA; or the first PA is not powered by the envelope tracking module; therefore, the stability of the PA is enhanced by improving the isolation between the first PA and the second PA, so that the problem of self-excitation oscillation of the PA is avoided, the problems of stray index deterioration, exceeding radiation, influence on communication experience and the like are further avoided, and the phenomenon of burning the PA is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

Fig. 1 is a schematic structural diagram of a wireless communication device according to a related aspect;

Fig. 2 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application;

Fig. 3 is a schematic diagram of a second structure of a wireless communication device according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of an envelope tracking module according to an embodiment of the present application;

fig. 5 is a schematic structural diagram III of a wireless communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application;

fig. 7 is a schematic diagram of a wireless communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram seventh of a wireless communication device according to an embodiment of the present application;

FIG. 10 is a schematic diagram of loop stability according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application;

Fig. 12 is a schematic diagram of a first signal and an adjusted envelope according to an embodiment of the present application;

Fig. 13 is a schematic diagram of supply terminal voltages of a first PA and a second PA after adding a loop filter according to an embodiment of the present application;

fig. 14 is a schematic diagram of a wireless communication device according to an embodiment of the present application;

Fig. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are illustrative of the application and are not intended to limit the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the application only and is not intended to be limiting of the application.

In the following description reference is made to "some embodiments," "this embodiment," "an embodiment of the application," and examples, etc., which describe a subset of all possible embodiments, but it is to be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with one another without conflict.

The descriptions of the "first, second, third" and the like in the embodiments of the present application are used for illustration and distinction of description objects, and are not used for order division, nor do they represent the special limitation of the number of the devices in the embodiments of the present application, and are not intended to constitute any limitation of the embodiments of the present application.

The electrical connection in the embodiment of the application can be direct connection or indirect connection, i.e. other devices are connected on the circuit between the two ends of the electrical connection.

The average Power tracking (Average Power Tracking, APT) technique enables the supply voltage of a Power Amplifier (PA) to vary with the envelope of the input signal. The ET technique can improve the energy efficiency of the rf power amplifier by tracking the power required by the PA compared to a fixed power system. ET technology is increasingly being used to optimize rf PA efficiency.

In a related scheme, as shown in fig. 1, a first end of a Modem 101 (Modem Integrated Circuit, modem IC) is electrically connected to a first end of a Radio Frequency transceiver chip 102 (RFIC), a second end of the RFIC 102 is electrically connected to a first end of a Radio Frequency PA module 103, the Radio Frequency PA module 103 is composed of PA11031 and PA2 1032, the first end of the Radio Frequency PA module 103 may be a first end of PA11031, a second end of PA11031 is electrically connected to a first end of PA2 1032, and a second end of PA2 1032 may be a second end of the Radio Frequency PA module 103; the radio frequency PA module is powered by two paths, namely Vcc1 and Vcc2; the second terminal of the Modem IC 101 is electrically connected to the first terminal of the Power management chip 104 (Power MANAGEMENT INTEGRATED Circuit, PMIC), the PMIC 104 is configured to supply Power to the Envelope tracking integrated chip 105 (Envelope TRACKING INTEGRATED CHIP, QETx), the second terminal of the PMIC 104 is electrically connected to the first terminal of QETx, the third terminal of the Modem IC 101 is electrically connected to the second terminal of QETx, the third terminal of QETx is electrically connected to the Power supply terminal of PA11031 (i.e., the third terminal of PA 1) in the rf PA module 103, and the third terminal of QETx 105 is also electrically connected to the Power supply terminal of PA2 1032 (i.e., the third terminal of PA 2) in the rf PA module 103. On one hand, the digital baseband signal generated by the Modem IC 101 passes through the RFIC 102 and then outputs a radio frequency signal, and then the radio frequency signal is subjected to power amplification by the radio frequency PA module 103; on the other hand, after QETx is entered, envelope waveforms modulated on the power supply voltage are generated through processing, and the modulated power supply voltage is supplied to the radio frequency PA module 103 to supply power, so that the power supply voltage tracks the envelope change of the radio frequency signal, and the purpose of saving power consumption is achieved.

However, the ET circuit of the related art has high load requirements, no or very small capacitance is arranged outside Vcc, so that reverse isolation of PA becomes poor, and PA self-oscillation phenomenon often occurs. As shown by the dashed line in fig. 1, the rf signal leaks out through the power line (i.e., the connection line between the third end of QETx and the power supply end of PA1 1031 and the power supply end of PA2 1032 in the rf PA module 103), and is transmitted along the dashed line direction to form a feedback loop, and if the loop is not isolated sufficiently, positive feedback is formed, so that PA oscillation is caused, thereby causing stray index deterioration, radiation superscale, affecting the communication experience, and serious PA burning phenomenon is caused.

Based on the above analysis, an embodiment of the present application provides a wireless communication device, and fig. 2 is a schematic structural diagram of the wireless communication device provided in the embodiment of the present application, as shown in fig. 2, the wireless communication device 20 includes: envelope tracking module 201, first PA 202 and second PA 203; wherein,

The output end of the first PA 202 is electrically connected with the input end of the second PA 203;

the first PA202 is configured to power amplify an input first signal, and the second PA 203 is configured to power amplify an amplified first signal output by the first PA 202;

The power supply end of the second PA203 is electrically connected to the first end of the envelope tracking module 201, and the envelope tracking module 201 is configured to provide an operating voltage for the second PA203 according to envelope information of the second signal; wherein the second signal is the first signal or a baseband signal of the first signal;

The power supply end of the first PA202 is electrically connected to the first end of the envelope tracking module 201 through the first filtering module 204, the first filtering module 204 is used for attenuating a high-frequency component in the feedback signal of the second PA 203, and the envelope tracking module 201 is used for providing an operating voltage for the first PA202 according to the envelope information of the second signal;

Or as shown in fig. 3, the wireless communication device 20 includes: envelope tracking module 201, first PA202 and second PA 203; wherein,

The output end of the first PA202 is electrically connected with the input end of the second PA 203;

the first PA 202 is configured to power amplify an input first signal, and the second PA 203 is configured to power amplify an amplified first signal output by the first PA 202;

The supply terminal of the first PA202 is not electrically connected to the first terminal of the envelope tracking module 201, and the voltage of the supply terminal of the first PA202 is a fixed voltage.

It can be understood that, in the embodiment of the present application, the power supply end of the first PA 202 and the power supply end of the second PA 203 are electrically connected to the first end of the envelope tracking module, so that the high-frequency component in the feedback signal of the second PA 203 may flow into the power supply end of the first PA 202 through the power supply end of the second PA 203, thereby causing the problem of PA self-excited oscillation, further possibly causing the problems of stray index deterioration, exceeding radiation, affecting the communication experience, and the like, and even causing PA burning phenomenon.

In the wireless communication device 20 provided by the embodiment of the present application, in order to solve the problem that in the ET technology, a high-frequency component in a feedback signal of the second PA 203 may flow into a power supply end of the first PA 202 through a power supply end of the second PA 203, so as to cause PA self-excited vibration, a first filtering module 204 is added between the envelope tracking module 201 and the first PA 202, so as to attenuate the high-frequency component in the feedback signal of the second PA 203; or the first PA 202 is not powered by the envelope tracking module 201; therefore, by improving the isolation between the first PA 202 and the second PA 203, the stability of the PA is enhanced, so that the problem of self-excitation oscillation of the PA is avoided, the problems of stray index deterioration, exceeding radiation, influence on communication experience and the like are further avoided, and the phenomenon of burning the PA is avoided.

It should be noted that, in the embodiment of the present application, the first filtering module 204 is not limited, and the first filtering module may be a single device (i.e. a capacitor, an inductor, a resistor, etc.), or may be a circuit or an integrated module; the first filtering module 204 may be capable of attenuating high frequency components in the feedback signal of the second PA 203.

Illustratively, the first filtering module 204 is a loop filter.

It should be noted that, in the embodiment of the present application, the loop filter is a low-pass filter.

It can be appreciated that in the embodiment of the present application, the loop filter can attenuate the high frequency component in the feedback signal of the second PA 203, thereby solving the problem of PA self-oscillation, and further improving the stability of the PA.

As a possible implementation, the power supply terminal of the second PA 203 is electrically connected to the first terminal of the envelope tracking module 201 through a first impedance line. The first end of the envelope tracking module 201 is electrically connected to the first end of the first filtering module 204 through a second impedance line; the second end of the first filter module 204 is electrically connected to the power supply end of the first PA 202 through a third impedance line. The impedance of the first impedance line is different from the impedance of the second impedance line and the impedance of the third impedance line, and the impedance of the second impedance line and the impedance of the third impedance line may be the same or different.

It should be noted that, in the embodiment of the present application, the first impedance line, the second impedance line, and the third impedance line may be microstrip lines with different impedances.

It can be appreciated that in the embodiment of the present application, since the feedback signal of the second PA 203 is transmitted to the first PA 202 through the first impedance line, the second impedance line, and the third impedance line, the first impedance line, the second impedance line, and the third impedance line can attenuate the feedback signal of the second PA 203, thereby avoiding self-oscillation of the PAs, and further being beneficial to improving the stability of the PAs.

In some embodiments, the envelope information of the second signal is the amplitude of the second signal; the envelope tracking module 201 is configured to: determining an amplitude of the second signal; and providing an operating voltage for the second PA 203 or the first PA 202 and the second PA 203 in accordance with the amplitude of the second signal; wherein the amplitude of the second signal is positively correlated with the provided operating voltage.

It can be appreciated that in the embodiment of the present application, since the amplitude of the second signal is positively correlated with the provided operating voltage, the second PA 203 or the first PA 202 and the second PA 203 are provided with the operating voltage based on the amplitude of the second signal, which is beneficial to providing the second PA 203 or the first PA 202 and the second PA 203 with the voltage according to the requirement, so that the power consumption can be saved.

It should be noted that, in the embodiment of the present application, the envelope tracking module 201 is not limited, and the envelope tracking module 201 can determine the amplitude of the second signal; and providing an operating voltage for the second PA 203 or the first PA 202 and the second PA 203 according to the amplitude of the second signal.

Illustratively, as shown in fig. 4, the envelope tracking module 201 includes an envelope generation module 301, an envelope detection module 302, and an envelope processing and output module 303; wherein the first end of the envelope generating module 301 is used as the second end of the envelope tracking module 201, the second end of the envelope generating module 301 is electrically connected with the first end of the envelope detecting module 302, the second end of the envelope detecting module 302 is electrically connected with the first end of the envelope processing and outputting module 303, and the second end of the envelope processing and outputting module 303 is used as the first end of the envelope tracking module.

In some embodiments, the providing the second PA 203 or the first PA 202 and the second PA 203 with the operating voltage according to the envelope information of the second signal includes: increasing the amplitude of the second signal if it is determined that the second signal is at an envelope trough based on the amplitude of the second signal; the second PA 203 or the first PA 202 and the second PA 203 are provided with an operating voltage based on the amplitude of the increased second signal.

It will be appreciated that the second PA203 or the first PA 202 and the second PA203 are powered based on ET technology, and thus the supply voltage is constantly changing. When the supply voltage is smaller, the triode junction capacitance in the PA becomes larger, resulting in a larger feedback gain of the high frequency signal, so that the reverse isolation between the first PA 202 and the second PA203 becomes worse, and further, the PA generates self-oscillation.

In the embodiment of the application, the amplitude of the second signal at the trough of the envelope is improved, and the amplitude of the second signal is positively correlated with the provided working voltage, so that the working voltage of the PA is also improved, the phenomenon that the capacitance of the triode junction in the PA is increased can be avoided, and the stability of the PA is improved.

In some embodiments, as shown in fig. 5, the apparatus further comprises a radio frequency control system 205; wherein a first end of the radio frequency control system 205 is electrically connected to an input end of the first PA 202, and a second end of the radio frequency control system 205 is electrically connected to a second end of the envelope tracking module 201; the radio frequency control system 205 is configured to output the second signal to the second end of the envelope tracking module 201, modulate the second signal to obtain the first signal, and output the first signal to the input end of the first PA 202.

In the embodiment of the present application, the rf control system 205 is not limited, and the rf control system 205 may be capable of outputting the second signal, modulating the second signal to obtain the first signal, and outputting the first signal to the input end of the first PA 202.

In other embodiments, as shown in fig. 6, the power supply terminal of the first PA202 is not electrically connected to the first terminal of the envelope tracking module 201, including: the power supply end of the first PA202 is electrically connected to an output end of a Direct Current-Direct Current (DCDC) power supply 207 through a second filtering module 206, the DCDC power supply 207 is configured to provide a voltage to the power supply end of the first PA202, and the second filtering module 206 is configured to attenuate a high frequency component in the voltage provided by the DCDC power supply 207.

It will be appreciated that the input power of the first PA202 is lower since the input signal of the first PA202 is an unamplified first signal and the input signal of the second PA203 is an amplified signal of the first PA 202. Also, since the linearity of the first PA202 needs to be better than that of the second PA203, the supply voltage of the first PA202 needs to be higher than that of the second PA203; also when the first PA202 is operating on a small signal, the power consumption is close to the quiescent current and the voltage fluctuation interval is small, so the first PA202 can be powered using the fixed DCDC power supply 207.

In the embodiment of the present application, the DCDC power supply 207 provides the working voltage for the first PA202, so that a loop is not formed between the second PA203 and the first PA202, and therefore, the feedback signal of the second PA203 cannot be input to the first PA202, so that the phenomenon of self-oscillation can be avoided, and the stability of the PA is further improved; because the signal to be amplified of the second PA203 is the amplified first signal output by the first PA202, the operating voltage is provided to the second PA203 by the envelope tracking module 201, so that power consumption can be saved. That is, in the embodiment of the present application, the PA can be powered based on the ET technology, so as to save power consumption, and also avoid the problem that the high-frequency component in the feedback signal of the second PA203 in the ET technology flows into the power supply end of the first PA202 through the power supply end of the second PA203, so as to cause PA self-excited vibration.

In some embodiments, as shown in fig. 7, the apparatus further comprises a radio frequency control system 205; wherein a first end of the radio frequency control system 205 is electrically connected to an input end of the first PA 202, and a second end of the radio frequency control system 205 is electrically connected to a second end of the envelope tracking module 201; the radio frequency control system 205 is configured to output the second signal to the second end of the envelope tracking module 201, modulate the second signal to obtain the first signal, and output the first signal to the input end of the first PA 202.

A third terminal of the radio frequency control system 205 is electrically connected to an input terminal of the DCDC power supply 207, and the radio frequency control system 205 is configured to provide a voltage to the DCDC power supply 207.

An embodiment of the present application provides a wireless communication apparatus 20, as shown in fig. 8, the wireless communication apparatus 20 includes: envelope tracking module 201, first PA 202 and second PA 203; wherein,

The power supply end of the second PA 203 is electrically connected with the first end of the envelope tracking module 201 through a first impedance line, and the envelope tracking module 201 is configured to provide an operating voltage for the second PA 203 according to envelope information of the second signal; wherein the second signal is the first signal or a baseband signal of the first signal;

The first end of the envelope tracking module 201 is electrically connected to the first end of the first filtering module 204 through a second impedance line; the second end of the first filtering module 204 is electrically connected to the power supply end of the first PA 202 through a third impedance line; the first filtering module 204 is configured to attenuate a high-frequency component in the feedback signal of the second PA203, and the envelope tracking module 201 is configured to provide an operating voltage for the first PA 202 according to envelope information of the second signal;

In some embodiments, the first filtering module 204 is a loop filter;

The envelope information of the second signal is the amplitude of the second signal; the envelope tracking module 201 is configured to: determining an amplitude of the second signal; and providing an operating voltage for the second PA 203 or the first PA 202 and the second PA 203 in accordance with the amplitude of the second signal; wherein the amplitude of the second signal is positively correlated with the provided operating voltage;

the providing the working voltage for the second PA 203 or the first PA 202 and the second PA 203 according to the envelope information of the second signal includes: increasing the amplitude of the second signal if it is determined that the second signal is at an envelope trough based on the amplitude of the second signal; the second PA 203 or the first PA 202 and the second PA 203 are provided with an operating voltage based on the amplitude of the increased second signal.

Or as shown in fig. 9, the wireless communication device 20 includes: envelope tracking module 201, first PA 202 and second PA 203; wherein,

The power supply terminal of the first PA 202 is not electrically connected to the first terminal of the envelope tracking module 201, comprising: the power supply terminal of the first PA 202 is electrically connected to the output terminal of the DCDC power supply 207 through the second filtering module 206, the DCDC power supply 207 is configured to provide a voltage to the power supply terminal of the first PA 202, and the second filtering module 206 is configured to attenuate a high-frequency component in the voltage provided by the DCDC power supply 207.

In some embodiments, the apparatus further comprises a radio frequency control system 205; wherein a first end of the radio frequency control system 205 is electrically connected to an input end of the first PA 202, and a second end of the radio frequency control system 205 is electrically connected to a second end of the envelope tracking module 201; the radio frequency control system 205 is configured to output the second signal to the second end of the envelope tracking module 201, modulate the second signal to obtain the first signal, and output the first signal to the input end of the first PA 202.

An exemplary application of the embodiments of the present application in a practical application scenario will be described below.

Fig. 10 is a schematic diagram of loop stability provided by the embodiment of the present application, as shown in fig. 10, if the gain of PA 1001 is G and the gain of FeedBack loop 1002 (FB) is F, the closed loop gain Xo/xi=g/(1+gf), where Xo is the output of the PA and Xi is the input of the PA; when PA is in steady state, xo/xi=g and GF approaches zero indefinitely. Let gf=0.01, i.e. -20dB, the feedback circuit f= -20-G. The cellular PA gain of a typical mobile phone is 15dB, so that the loop reverse isolation needs to reach 35dB.

In some embodiments, loop reverse isolation may be improved from two aspects. On the one hand, since in ET technology, a constant modulation voltage is required to track the PA power variation, the external capacitance is required to be small so that the modulation voltage cannot keep up with the signal envelope variation. The feedback signal of the second PA is coupled to the input end of the first PA through the power line due to the fact that the external capacitance is too small, positive feedback is formed after the feedback signal is amplified by the first PA and the second PA, and PA self-excitation oscillation is caused, and therefore a loop filter module (namely a first filter module or a loop filter) is added to loops of the second PA and the first PA, and isolation can be improved; on the other hand, the power supply voltage is reduced to cause the capacitor of the triode junction in the PA to be increased, the feedback gain of the high-frequency signal is necessarily increased due to the increased capacitor, and therefore reverse isolation is poor, and the PA is easy to oscillate. It is therefore desirable to maintain the envelope shape at high power while increasing the supply voltage amplitude at low power.

Fig. 11 is a schematic structural diagram eight of a wireless communication device according to an embodiment of the present application, and as shown in fig. 11, a wireless communication device 20 includes: an envelope tracking module 201, a first PA 202, a second PA 203, a loop filter 204, and a radio frequency control system 205; wherein the envelope tracking module 201 comprises: an envelope generation module 301, an envelope detection module 302, an envelope processing and output module 303. A first end of the radio frequency control system 205 is electrically connected to a first end of the first PA 202, and a second end of the radio frequency control system 205 is electrically connected to a second end of the envelope tracking module 201; a first end of the envelope generating module 301 is electrically connected to a second end of the radio frequency control system 205 as a second end of the envelope tracking module 201, a second end of the envelope generating module 301 is electrically connected to a first end of the envelope detecting module 302, a second end of the envelope detecting module 302 is electrically connected to a first end of the envelope processing and outputting module 303, a second end of the envelope processing and outputting module 303 is used as a first end of the envelope tracking module to provide an operating voltage for the first PA 202 and the second PA 203, and the first end of the envelope processing and outputting module 303 is electrically connected to a first end of the loop filter 204 through a second impedance line; a second end of the loop filter 204 is electrically connected to a power supply end of the first PA 202 through a third impedance line; the first end of the envelope processing and outputting module 303 is electrically connected to the power supply end of the second PA 203 through a first impedance line, and the second end of the first PA 202 is electrically connected to the first end of the second PA 203; the envelope generation module is used for acquiring radio frequency envelope information of the PA, the envelope detection module is used for extracting a radio frequency envelope, and the envelope processing and outputting circuit is used for shaping the extracted envelope into a desired waveform, such as increasing voltage at the trough of an envelope. The operation of the wireless communication device 20 is as follows:

1, the radio frequency control system 205 generates an IQ signal (i.e. a second signal) through a baseband circuit, modulates the IQ signal through a radio frequency modulation circuit, outputs the radio frequency signal (i.e. a first signal) to the first PA 202, and provides a supply voltage for the first PA 202 and the second PA 203 by the envelope tracking module 201, and the radio frequency signal is amplified by the first PA 202 and the second PA 203 of the driving stage and is used for being output to an antenna.

2, The radio frequency control system 205 simultaneously provides the generated IQ signal (i.e. the second signal) to the envelope generation module 301, and the envelope generation module 301 is configured to acquire the envelope information of the second signal and then transmit the envelope information to the envelope detection module 302.

And 3, the envelope detection module 302 extracts an envelope by using a detection circuit, sends the extracted envelope to the envelope processing and outputting module 303, adjusts the extracted envelope into a desired waveform (namely, improves the amplitude of the second signal when the second signal is determined to be at the trough of the envelope based on the amplitude of the second signal), and outputs the waveform to the first PA 202 and the second PA 203 for power supply.

Fig. 12 is a schematic diagram of a first signal and an adjusted envelope according to an embodiment of the present application, and as shown in fig. 12, 1201 is an LTE signal (i.e., first signal) envelope. The adjusted envelope represented by 1202 in fig. 12, it can be seen that the line at its peak is closely adjacent to the modulated signal envelope 1201 and that the voltage a at its trough is significantly higher than the point B of the modulated signal envelope 1201.

The voltage Vout output by the envelope processing and outputting module 303 is divided into two paths Vcc1 and Vcc2, vcc1 passes through the impedance line 1 (i.e. the second impedance line) and the loop filter, and then passes through the impedance line 1 (i.e. the third impedance line) to supply power to the first PA202, and Vcc2 passes through the impedance line 2 (i.e. the first impedance line) to supply power to the second PA 203. The impedance lines may be microstrip lines of different impedances designed to improve the reverse isolation of the second PA 203 from the first PA 202.

5, The loop filter is used for filtering the high-frequency signal in the loop, and further increasing the reverse isolation from the second PA 203 to the first PA 202, and the voltage of the power supply terminal after the loop filter is added is shown in fig. 13. It can be seen that in fig. 13, after adding the loop filter, the output voltage of the first PA 202 is identical to the output voltage of the second PA 203, i.e. the loop filter attenuates the feedback signal of the second PA 203. That is, the reverse isolation between the first PA 202 and the second PA 203 is improved after the loop filter is added.

In the embodiment of the application, the stability of the radio frequency PA module is effectively improved by improving the loop isolation and the lowest voltage of the power supply voltage of the PA, and the self-excitation problem of an ET PA circuit in the existing product is solved.

In the embodiment of the application, based on the problem of self-excitation of the current ET PA, a method for improving the stability of a terminal ET PA circuit is provided, on one hand, the amplitude of the power supply voltage of the PA under low voltage is improved by optimizing an envelope waveform, and the internal junction capacitance of a heterojunction bipolar transistor (Heterojunction Bipolar Transistor, HBT) is reduced; on the other hand, increasing the impedance line and the loop filter increases the isolation between the supply voltage of the first PA 202 and the supply voltage of the second PA 203; by the two-aspect treatment, the loop stability of the ET PA can be effectively improved, and the PA self-excitation phenomenon is avoided.

Furthermore, the first PA 202 acts as a driving stage, the linear characteristic is generally better than the second PA 203, and the input power is lower, and in order to maintain the better linear characteristic, the supply voltage of the first PA 202 must not be too low. And when the first PA 202 works in a small signal, the power consumption is close to the quiescent current, and the voltage fluctuation interval is smaller, so that the power supply voltage of the first PA 202 can be connected to a fixed DCDC power supply, and the power supply filter capacitance is increased, thereby supporting ET and avoiding the stability problem.

An embodiment of the present application provides a wireless communication apparatus 20, as shown in fig. 14, the wireless communication apparatus 20 includes: an envelope tracking module 201, a first PA 202, a second PA 203, a radio frequency control system 205, a filter capacitor 206 (i.e., a second filter module), and a DCDC power supply 207; wherein the envelope tracking module 201 comprises: an envelope generation module 301, an envelope detection module 302, an envelope processing and output module 303. A first end of the radio frequency control system 205 is electrically connected to a first end of the first PA 202, and a second end of the radio frequency control system 205 is electrically connected to a second end of the envelope tracking module 201; the first end of the envelope generating module 301 is electrically connected to the second end of the radio frequency control system 205 as the second end of the envelope tracking module 201, the second end of the envelope generating module 301 is electrically connected to the first end of the envelope detecting module 302, the second end of the envelope detecting module 302 is electrically connected to the first end of the envelope processing and outputting module 303, the second end of the envelope processing and outputting module 303 is used as the first end of the envelope tracking module to provide the working voltage for the second PA 203, the second end of the envelope processing and outputting module 303 is electrically connected to the power supply end of the second PA 203 through the first impedance line, the third end of the radio frequency control system 205 is electrically connected to the first end of the DCDC power supply 207, the second end of the DCDC power supply 207 is electrically connected to the first end of the filter capacitor 206 (i.e., the second filter module), and the second end of the filter capacitor 206 is electrically connected to the power supply end of the first PA 202, and the second end of the first PA 202 is electrically connected to the first end of the second PA 203.

The above description is merely provided for the preferred embodiments of the present application, and the scope of the embodiments of the present application is not limited to the above-mentioned embodiments, but all equivalent modifications or variations according to the disclosure of the embodiments of the present application should be included in the scope of protection described in the claims.

An embodiment of the present application provides an electronic device, and fig. 15 is a schematic structural diagram of an electronic device provided in the embodiment of the present application, and as shown in fig. 15, an electronic device 150 includes a wireless communication apparatus 20.

It can be understood that the electronic device mentioned in the embodiment of the present application includes the wireless communication device provided in the embodiment of the present application.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" or "some embodiments" or "in one possible implementation" or "example" etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in some embodiments" or "in one possible implementation" or "example" or the like in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application. The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.

The term "and/or" is herein merely an association relation describing associated objects, meaning that there may be three relations, e.g. object a and/or object B, may represent: there are three cases where object a alone exists, object a and object B together, and object B alone exists.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and device, etc. may be implemented in other manners. The embodiments described above are exemplary only, and further, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, indirect coupling or communication connection of devices or modules, electrical, mechanical or otherwise.

The features disclosed in the several product embodiments provided by the application can be combined arbitrarily under the condition of no conflict to obtain new product embodiments.

The foregoing is merely an embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wireless communications apparatus, the apparatus comprising an envelope tracking module, a first PA, and a second PA; wherein,

The output end of the first PA is electrically connected with the input end of the second PA;

the first PA is used for amplifying the power of the input first signal, and the second PA is used for amplifying the power of the amplified first signal output by the first PA;

The power supply end of the second PA is electrically connected with the first end of the envelope tracking module, and the envelope tracking module is used for providing working voltage for the second PA according to envelope information of a second signal; wherein the second signal is the first signal or a baseband signal of the first signal;

the power supply end of the first PA is electrically connected with the first end of the envelope tracking module through a first filtering module, the first filtering module is used for attenuating high-frequency components in feedback signals of the second PA, and the envelope tracking module is used for providing working voltage for the first PA according to envelope information of the second signals;

or the power supply end of the first PA is not electrically connected with the first end of the envelope tracking module, and the voltage of the power supply end of the first PA is a fixed voltage.

2. The apparatus of claim 1, wherein the first filtering module is a loop filter.

3. The apparatus of claim 1, wherein a supply terminal of the second PA is electrically connected to a first terminal of the envelope tracking module through a first impedance line.

4. A device according to claim 1 or 3, wherein,

The first end of the envelope tracking module is electrically connected with the first end of the first filtering module through a second impedance line;

the second end of the first filter module is electrically connected with the power supply end of the first PA through a third impedance line.

5. The apparatus according to any of claims 1 to 4, wherein the envelope information of the second signal is the amplitude of the second signal; the envelope tracking module is used for:

Determining an amplitude of the second signal; and

Providing an operating voltage for the second PA or the first PA and the second PA according to the amplitude of the second signal; wherein the amplitude of the second signal is positively correlated with the provided operating voltage.

6. The apparatus of claim 5, wherein the providing the second PA or the first PA and the second PA with the operating voltage based on envelope information of the second signal comprises:

increasing the amplitude of the second signal if it is determined that the second signal is at an envelope trough based on the amplitude of the second signal;

and providing an operating voltage for the second PA or the first PA and the second PA based on the increased amplitude of the second signal.

7. A device according to claim 1 or 3, wherein the power supply terminal of the first PA is not electrically connected to the first terminal of the envelope tracking module, comprising:

The power supply end of the first PA is electrically connected with the output end of the DCDC power supply through the second filtering module, the DCDC power supply is used for providing voltage for the power supply end of the first PA, and the second filtering module is used for attenuating high-frequency components in the voltage provided by the DCDC power supply.

8. The apparatus of any one of claims 1 to 6, further comprising a radio frequency control system; wherein,

The first end of the radio frequency control system is electrically connected with the input end of the first PA, and the second end of the radio frequency control system is electrically connected with the second end of the envelope tracking module;

the radio frequency control system is configured to output the second signal to the second end of the envelope tracking module, modulate the second signal to obtain the first signal, and output the first signal to the input end of the first PA.

9. The apparatus of claim 7, further comprising a radio frequency control system; wherein,

The radio frequency control system is used for outputting the second signal to the second end of the envelope tracking module, modulating the second signal to obtain the first signal, and outputting the first signal to the input end of the first PA;

the third end of the radio frequency control system is electrically connected with the input end of the DCDC power supply, and the radio frequency control system is used for providing voltage for the DCDC power supply.

10. An electronic device, characterized in that it comprises the wireless communication apparatus according to any one of claims 1 to 9.