CN109068379B - Control circuit and control method of power amplifier and terminal - Google Patents

Control circuit and control method of power amplifier and terminal Download PDF

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Publication number
CN109068379B
CN109068379B CN201811109076.2A CN201811109076A CN109068379B CN 109068379 B CN109068379 B CN 109068379B CN 201811109076 A CN201811109076 A CN 201811109076A CN 109068379 B CN109068379 B CN 109068379B
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power
power supply
indication signal
terminal
signal
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CN109068379A (en
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伏奎
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

The application discloses a control circuit and a control method of a power amplifier, and belongs to the field of communication. The control circuit is used in a terminal, and the control circuit comprises: a modem, a power supply control component and the power amplifier; the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, and the power supply control assembly is electrically connected with a power supply of the terminal; according to the method and the device, the modem is used for obtaining the indication information of the data to be sent, which indicates whether the terminal has data to send in each subsequent time period, and when the terminal has no data to send in a certain subsequent time period, the modem can indicate the power supply control component to stop supplying power to the power amplifier, so that the power amplifier of the transmitter is prevented from continuously consuming power when the transmitter is in an idle state, and the power consumption of the terminal is reduced.

Description

Control circuit and control method of power amplifier and terminal
Technical Field
The present disclosure relates to the field of communications, and in particular, to a control circuit, a control method, and a terminal for a power amplifier.
Background
With the development of the communication field, more and more data services are transmitted by a terminal based on a wireless communication system, which results in greatly increased power consumption of the terminal, and therefore, how to reduce the power consumption of the terminal during wireless data transmission becomes a problem to be solved by technical personnel in the field.
In the related art, when the terminal performs wireless data transmission, the voltage of the power amplifier of the transmitter may be adjusted by using an envelope tracking technique. Specifically, the terminal predicts the magnitude of the envelope signal intensity in a period of time in the future according to data to be sent by the terminal; under the condition that the intensity of the envelope signal is large (for example, the intensity of the envelope signal is greater than 10dBm), calculating the voltage of the power amplifier in a future period according to the intensity of the envelope signal, and controlling the power amplifier to work under the corresponding voltage at a corresponding time point; in a state where the envelope signal strength is small (for example, the envelope signal strength is less than 10dBm), the terminal maintains the operating voltage of the power amplifier at a small fixed value.
Based on the method adopted by the related technology, the terminal always maintains a smaller working voltage at the power amplifier side, which still causes the waste of the power consumption of the terminal and influences the effect of saving the electric quantity of the terminal.
Disclosure of Invention
In order to solve the problems of the related art, embodiments of the present application provide a control circuit, a control method, and a terminal for a power amplifier. The technical scheme is as follows:
in a first aspect, a control circuit of a power amplifier is provided, the control circuit being used in a terminal, and the control circuit including: a modem, a power supply control component and the power amplifier;
the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, and the power supply control assembly is electrically connected with a power supply of the terminal;
the modem is used for acquiring indication information of data to be sent, and the indication information of the data to be sent is used for indicating whether the terminal has data to send in each subsequent time period;
the modem is used for sending a first indication signal to the power supply control component when the power supply control component receives power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period;
the power supply control component is used for stopping supplying power to the power amplifier when the first indication signal is received;
the modem is further configured to send a second indication signal to the power supply control component after the power supply control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
the power supply control component is used for starting to supply power to the power amplifier when receiving the second indication signal.
In a second aspect, a method of controlling a power amplifier is provided, the method being performed by a modem in a control circuit of the power amplifier, the control circuit further comprising a power supply control component and the power amplifier; the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, the power supply control assembly is electrically connected with a power supply of the terminal, and the power supply control assembly receives power supply of the power supply; the method comprises the following steps:
acquiring indication information of data to be sent, wherein the indication information of the data to be sent is used for indicating whether the terminal has data to send in each subsequent time period;
when the power supply control assembly receives power supply of the power supply and supplies power to the power amplifier, and the terminal does not send data in a subsequent first time period, sending a first indication signal to the power supply control assembly; the first indication signal is used for indicating the power supply control component to stop supplying power to the power amplifier;
after the power supply control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, sending a second indication signal to the power supply control component; the second indication signal is used for indicating the power supply control component to start supplying power to the power amplifier.
In a third aspect, a terminal is provided, which comprises the control circuit of the power amplifier as described above.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the modem is used for acquiring indication information indicating whether the terminal has data to be sent in each subsequent time period, and when the terminal does not have data to be sent in a certain subsequent time period (namely a second time period), the modem can indicate the power supply control component to stop supplying power to the power amplifier, so that the power amplifier of the transmitter is prevented from continuously consuming power when the transmitter is in an idle state, and the power consumption of the terminal is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for transmitting data by a terminal according to an embodiment of the present application;
fig. 2 is a schematic diagram of a control circuit of a power amplifier according to an exemplary embodiment of the present application;
fig. 3 is a schematic diagram of a control circuit of a power amplifier according to an exemplary embodiment of the present application;
fig. 4 is a schematic diagram of a voltage state of a power amplifier according to an embodiment of the present application;
fig. 5 is a schematic diagram of a control circuit of a power amplifier according to an exemplary embodiment of the present application;
fig. 6 is a schematic diagram of a control circuit of a power amplifier according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a control circuit of a power amplifier according to an exemplary embodiment of the present application;
fig. 8 is a schematic diagram of a control circuit of a power amplifier according to an embodiment of the present disclosure;
fig. 9 is a flowchart of a method for controlling a power amplifier according to an exemplary embodiment of the present application;
fig. 10 is a schematic diagram of a signal image according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The scheme that this application provided can be arranged in having the terminal of radio signal emission function, for example, this terminal can be mobile terminal such as smart mobile phone, panel computer, electronic book reader, and perhaps, this terminal also can be intelligent wearable equipment such as intelligent wrist-watch, intelligent glasses or intelligent bracelet. For the sake of understanding, the following first presents some terms relating to the embodiments of the present application and the principles of their application in a simplified form.
A modem: a device for converting a digital signal into an analog signal by modulation at a transmitting end of a terminal and converting the analog signal into the digital signal by demodulation at a receiving end of the terminal. Wherein, the modulation is to convert the digital signal into an analog signal transmitted on a line; demodulation is the conversion of an analog signal to a digital signal. In a terminal, when a modem modulates a signal, the modem generally modulates a signal to be modulated into an I signal and a Q signal, where the I signal is a phase component of an original signal, and the Q signal is a quadrature component of the original signal.
A power amplifier: refers to an amplifier that produces maximum power output to drive a load (e.g., a speaker) at a given distortion rate. In a terminal, a power amplifier is a radio frequency power amplifier for power amplifying a radio frequency signal transmitted by a transmitter of the terminal, so that when an antenna of the terminal can transmit the radio frequency signal to a sufficiently long distance, the radio frequency power amplifier can still be detected and received by a receiver on another terminal or a base station.
A radio frequency power amplifier: are important components of various wireless transmitters. In the front stage circuit of the transmitter, the radio frequency signal power generated by the modulation oscillation circuit is very small, and the radio frequency signal needs to be amplified in a series, and can be fed to an antenna to be radiated after sufficient radio frequency power is obtained through a buffer stage, an intermediate amplification stage, a final power amplification stage and the like. In order to obtain a sufficiently large radio frequency output power, a radio frequency power amplifier must be employed. The main technical indicators of the rf power amplifier are output power and efficiency. In addition, the harmonic components in the output should be as small as possible to avoid interference with other channels. Finally, the final stage of the transmitting stage amplifies the power of the high-frequency modulated wave signal to meet the requirement of transmitting power, and then radiates the high-frequency modulated wave signal to the space through the antenna, so that the receiving stage in a certain area can receive satisfactory signal level and does not interfere the communication of adjacent channels. It should be noted that, the power amplifiers mentioned in the following embodiments of the present application are all referred to as radio frequency power amplifiers.
Envelope Tracking technique (Envelop Tracking): the technology is used for improving the efficiency of the power amplifier, and belongs to the dynamic power supply modulation technology. The envelope tracking technique tracks and amplifies the signal envelope by an envelope tracker,and provides power to the power amplifier. In this way, the power amplifier can always operate in the compression critical region, so that the average efficiency of the power amplifier in the whole power range can be improved. The power amplifier voltage of the radio frequency amplifier changes along with the signal envelope, so that the power amplifier efficiency of the radio frequency amplifier is always in a high-efficiency condition, and the power consumption can be effectively reduced. The extraction of the envelope signal in the envelope tracking technique can be directly calculated from the baseband I, Q signal, and the formula can be expressed as
Figure GDA0002965877700000051
Orthogonal Frequency Division Multiplexing (OFDM): sometimes also called Discrete Multi-tone Modulation (DMT), is one type of Multi-carrier Modulation (MCM Multi-carrier Modulation). The main principle is as follows: the channel of the original signal is divided into a plurality of orthogonal sub-channels, the high-speed data signal is converted into parallel low-speed sub-data streams, and the parallel low-speed sub-data streams are modulated to each sub-channel for transmission. Orthogonal signals may be separated by correlation techniques at the receiving end, which may reduce inter-symbol Interference (ISI) between subchannels. The signal bandwidth on each subchannel is less than the associated bandwidth of the channel, and therefore can be viewed as flat fading on each subchannel, so that intersymbol interference can be eliminated. And since the bandwidth of each sub-channel is only a small fraction of the original channel bandwidth, channel equalization becomes relatively easy.
Finite State Machine (FSM): is a hardware sequential circuit composed of a register set and combinational logic. The state of a finite state machine (i.e., the finite number of states consisting of the combined states of 1 and 0 of a register set) can only be transitioned from one state to another on the same clock transition edge.
Referring to fig. 1, a schematic diagram of a system structure for transmitting data by a terminal according to an embodiment of the present application is shown, as shown in fig. 1, where the system structure includes a first terminal 110, a base station 120, and a second terminal 130.
The first terminal 110 is a terminal device capable of transmitting data to the second terminal 130 or receiving data transmitted by the second terminal 130 through the base station 120, for example, the first terminal may be a mobile phone, a tablet computer, an intelligent robot, or the like.
The base station 120 is configured to receive data transmitted by the first terminal 110 and transmit the data to the second terminal 130. Of course, the base station 120 may also receive data transmitted by the second terminal 130 and transmit the data to the first terminal 110.
The second terminal 130 is also a terminal device capable of transmitting data to the first terminal 110 or receiving data transmitted by the first terminal 110 through the base station 120, for example, the second terminal may be a mobile phone, a tablet computer, an intelligent robot, or the like.
Referring to fig. 2, a schematic diagram of a control circuit of a power amplifier according to an exemplary embodiment of the present application is shown. The control circuit is used in a terminal, which may be, for example, the first terminal or the second terminal in the system shown in fig. 1. As shown in fig. 2, the terminal 20 includes the control circuit 21 and the power supply 22, and the control circuit 21 includes: a modem 210, a power control component 211, and a power amplifier 212;
the modem 210 is electrically connected to the power control component 211, the power control component 211 is electrically connected to the power amplifier 212, and the power control component 211 is electrically connected to the power source 22 of the terminal;
the power supply in the terminal supplies power to the power supply control component, the power supply control component supplies power to the power amplifier, and the voltage for supplying power to the power amplifier is also controlled by the power supply control component. For example, the voltage supplied to the power amplifier by the power supply control component may be a fixed value, or the voltage supplied to the power amplifier by the power supply control component may vary with the size of the envelope of the data transmitted by the terminal.
The modem 210 is configured to obtain indication information of data to be sent, where the indication information of data to be sent is used to indicate whether a terminal has data to send in each subsequent time period.
When data needs to be sent in the terminal, the modem modulates the data needing to be sent and transmits the modulated data to a transceiver in the terminal for sending. Since there is usually a certain time difference between the completion of data modulation and the transmission of data by the transceiver, that is, when the terminal performs data modulation, the modem can acquire which time periods have data transmission and which time periods have no data transmission.
In this embodiment of the present application, the indication information of the data to be transmitted may be the size of I data and Q data to be transmitted in each subsequent time period in the data obtained by modem modulation; when both I data and Q data to be transmitted in a certain subsequent time period are 0, it may be considered that the terminal has no data to transmit in the time period, that is, the transmitter of the terminal will be in an idle state in the time period; conversely, when any data of the I data and the Q data to be transmitted in a certain subsequent time period is not 0, it can be considered that the terminal has data to transmit in the time period.
In another possible implementation manner, the indication information of the data to be transmitted may also be an envelope signal size of data to be transmitted in subsequent time periods. When the envelope signal size of the data to be transmitted in a certain subsequent time period is 0, it can be considered that the terminal has no data to transmit in the time period, that is, the transmitter of the terminal will be in an idle state in the time period; conversely, when the envelope signal size of the data to be transmitted in a certain subsequent time period is not 0, it may be considered that there is data to be transmitted by the terminal in the time period.
The modem 210 is configured to send a first indication signal to the power control component when the power control component receives power from the power supply and supplies power to the power amplifier, and the terminal has no data to send in a subsequent first time period.
The power control component 211 is configured to stop supplying power to the power amplifier when receiving the first indication signal.
In this embodiment, the modem may monitor I data and Q data to be transmitted by the terminal in each subsequent time period, and when both the I data and the Q data to be transmitted by the terminal in a certain subsequent time period are 0, may send a signal to the power control component to instruct the power control component to stop supplying power to the power amplifier.
Or, the modem may monitor the size of the envelope signal of the data to be transmitted in each subsequent time period, and when the size of the envelope signal to be transmitted by the terminal in a certain subsequent time period is 0, may send a signal to the power supply control component to instruct the power supply control component to stop supplying power to the power amplifier.
The modem 210 is further configured to send a second indication signal to the power control component after the power control component stops supplying power to the power amplifier and the terminal has data to send in a subsequent second time period.
The power control component 211 is configured to start power supply to the power amplifier when receiving the second indication signal.
After the modem instructs the power control component to stop supplying power to the power amplifier, when it is determined that there is data to be transmitted in a certain subsequent time period (i.e. the I data and the Q data to be transmitted by the terminal in the certain subsequent time period are not both 0, or the envelope signal of the data to be transmitted by the terminal in the certain subsequent time period is not 0), a signal may be sent to the power control component to instruct the power control component to start supplying power to the power amplifier.
In one possible implementation, the modem may send a first indication signal to the power control component when it detects that no data is sent during a subsequent first time period and the duration of the first time period reaches or exceeds a certain time threshold.
In this embodiment, in order to avoid frequent stopping and starting of power supply to the power amplifier, when it is determined that no data is transmitted in the subsequent first time period, the modem may determine whether the first time period reaches a preset time threshold, and when the duration of the first time period reaches the time threshold, may send a first indication signal to the power supply control component.
The duration threshold may be preset by a developer, for example, the duration threshold may be set to a duration of 1 OFDM symbol (approximately equal to 66.7 us).
In an embodiment of the application, the modem may send a second indication signal to the source control component at the beginning of the first time period.
In the embodiment of the present application, the modem is further connected to a transceiver, through which a transmission data signal can be transmitted to the power amplifier, and a transmitting antenna is further connected behind the power amplifier, and is used for transmitting the signal amplified by the power amplifier, and other components and circuits.
The power control component 211 provided in the present application may be configured to implement turning on and off of the power amplifier 212 that is correspondingly controlled, and in a data transmission process of the terminal, when a transmitter of the terminal is in a low power output state (for example, power is less than 10dBm) or an idle state, the power control component 211 may stop supplying power to the power amplifier 212, so as to reduce a power waste of the power amplifier in the terminal.
To sum up, the modem is used to obtain indication information indicating whether the terminal has data to be sent in each subsequent time period, and when the terminal has no data to be sent in a certain subsequent time period (i.e., the second time period), the modem can indicate the power control component to stop supplying power to the power amplifier, so that the power amplifier of the transmitter is prevented from continuously consuming power when the transmitter is in an idle state, and the power consumption of the terminal is reduced.
Based on the control circuit in the embodiment shown in fig. 2, in a possible implementation manner, a dedicated control unit may be provided in the control circuit to control the stop and start of the power supply to the power amplifier, or the stop and start of the power supply to the power amplifier may be controlled by a device already existing in the related art.
When a dedicated control unit is provided in the control circuit to control the stop and start of power supply to the power amplifier, please refer to fig. 3, which shows a schematic diagram of a control circuit structure of a power amplifier according to an exemplary embodiment of the present application. As shown in fig. 3, the control circuit is used in a terminal 30, and includes: a modem 310, a power control component 311, and a power amplifier 312;
the power control module 311 includes: a switch control unit 311a, a Power Management Integrated Circuit (PMIC) 311b, and an Envelope Tracker (ET) 311 c;
the modem 310 is electrically connected to the switch control unit 311, the switch control unit 311 is electrically connected to the PMIC311b, and the PMIC311b is electrically connected to the power supply 313 of the terminal and the ET 311c, respectively; the ET 311c is electrically connected with the power amplifier;
the modem is configured to acquire data indication information to be sent, where the data indication information to be sent is used to indicate whether a terminal has data to send in each subsequent time period.
The modem is used for sending a first indication signal to the power supply control component when the power supply control component receives power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period.
The power supply control component is used for stopping supplying power to the power amplifier when receiving the first indication signal.
The modem is further used for sending a second indication signal to the power supply control component after the power supply control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
the power supply control component is used for starting to supply power to the power amplifier when receiving the second indication signal.
When the modem sends a first indication signal to the power control component, the modem is specifically configured to receive power supplied by the power supply and supply power to the power amplifier, and when the terminal has no data to send in a subsequent first time period, the modem sends the first indication signal to the switch control unit;
the switch control unit 311a is configured to control the PMIC311b to stop supplying power to the ET 311c when receiving the first indication signal;
when the modem 310 sends the second indication signal to the power control component 311, the modem 310 is configured to send the second indication signal to the switch control unit 311a when the power control component 311 stops supplying power to the power amplifier 312 and the terminal 30 has data to send in a subsequent second time period;
the switch control unit 311a is configured to control the PMIC311b to start supplying power to the ET 311c when receiving the second indication signal.
In this embodiment, the PMIC receives power from the power supply of the terminal and simultaneously supplies power to the ET, for example, supplies power to the ET at a fixed voltage, and the ET receives power from the PMIC and simultaneously supplies power to the power amplifier, for example, determines the voltage for supplying power to the power amplifier according to the size of the envelope signal of the data transmitted by the terminal and supplies power to the power amplifier according to the determined voltage. When the modem sends the first indication signal to the switch control unit, the switch control unit controls the PMIC to enable the PMIC to stop supplying power to the ET, and at the moment, the ET cannot obtain the power supply of the PMIC, and the power amplifier cannot be supplied with power any more. Correspondingly, when the modem sends the second indication signal to the switch control unit, the switch control unit controls the PMIC so that the PMIC starts to supply power to the ET, and at this time, the ET regains power supply of the PMIC and also starts to supply power to the power amplifier.
Specifically, the modem 310 includes a signal modulation unit, a data calculation unit, and a data analysis unit. The signal Modulation unit modulates a signal transmitted from the terminal 30, for example, the signal Modulation unit generates an I signal and a Q signal by Quadrature Amplitude Modulation (QAM), and the signal Modulation unit transmits the modulated I signal and Q signal to a data calculation unit and a data analysis unit, wherein the data calculation unit calculates an envelope size of the signal. Alternatively, the data calculation unit may send the calculated envelope size to ET 311c, and provide ET 311c with the output voltage that ET 311c provides to power amplifier 312 according to the envelope size.
The data analysis unit analyzes the obtained I signal and Q signal to obtain data information of the I signal and Q signal in each time period, and the modem 310 selects whether to transmit the first indication signal and the second indication signal according to the data. For example, according to the data obtained by the data analysis unit, when the values of the I signal and the Q signal in the first time period are both equal to 0, that is, when it is analyzed that the terminal 30 has no data transmission in the subsequent first time period, the modem 310 selects to transmit the first indication signal to the switch control unit 311a, and when the switch control unit 311a receives the first indication signal, the response is to control the PMIC311b to stop supplying power to the ET 311 c; when the values of the I signal and the Q signal in the second time period are not equal to 0, that is, when it is analyzed that there is data to be transmitted in the subsequent second time period by the terminal 30, a second indication signal is transmitted to the switch control unit 311a, and when the switch control unit 311a receives the second indication signal, the switch control unit responds to control the PMIC311b to start power supply to the ET 311 c.
Further, when the switch control unit 311a controls the PMIC311b to stop supplying power to the ET 311c, the switch control unit 311a is specifically configured to send a first turn-off signal to the PMIC311b when receiving the first indication signal, where the first turn-off signal is used to trigger the PMIC311b to turn off;
when the PMIC311b is controlled to start to supply power to the ET 311c, the switch control unit 311a is specifically configured to send a first turn-on signal to the PMIC311b when receiving the second indication signal, where the first turn-on signal is used to trigger the PMIC311b to turn on.
In this embodiment of the present application, when the PMIC is controlled to stop supplying power to the ET, the switch control unit may directly control the PMIC to turn off, at this time, the PMIC is actively turned off, and the ET and the power amplifier are passively turned off because the power input is not obtained.
Optionally, when the modem 310 sends the second indication signal to the switch control unit 311a, the modem 310 is specifically configured to send the second indication signal to the switch control unit 311a before the second time period and at a time when a time length between a starting time of the second time period and a starting time of the second time period is a first preset time length;
wherein the first preset duration is set according to a predicted duration from the time the second indication signal is sent to the time the power amplifier 312 reaches a preset voltage.
Specifically, when the operating voltage of the power amplifier 312 in the terminal is fixed, that is, in the case of data output, the power amplifier 312 operates at the rated operating voltage, at this time, the first preset time period may be determined by a developer through a series of experiments to obtain a predicted time period between the sending of the second indication signal from the modem 310 and the reaching of the operating voltage of the power amplifier 312 to the rated operating voltage, so as to determine according to the predicted time period, for example, the predicted time period is determined as the first preset time period, and the predicted time period is set in the modem in advance.
In another possible implementation manner, the operating voltage of the power amplifier 312 in the terminal 30 is changed according to the calculated envelope size, in this case, a prediction rule is set in the modem 310 in advance, the voltage required for the starting time of the second time period is determined according to the prediction rule, then a predicted time period between the time when the operating voltage of the power amplifier 312 sent by the modem 310 reaches the voltage required for the starting time of the second time period is determined, and the predicted time period is determined according to the predicted time period, for example, the predicted time period is determined as the first preset time period.
For example, please refer to fig. 4, which shows a voltage state diagram of a power amplifier according to an embodiment of the present application. As shown in fig. 4, the first preset time period, the first time period, the second time period and the voltage of the power amplifier in each time period are included. Fig. 4 is a schematic diagram of a developer setting a first preset time period in advance in a control circuit and detecting a change of an operating voltage of a power amplifier when the control circuit operates. As can be seen from the figure, at the beginning of the first time period corresponding to the time when the terminal has no data to transmit, the voltage of the power amplifier starts to decrease until it is 0, and at the time of the first preset time period before the beginning of the second time period when the terminal has data to transmit, the voltage of the power amplifier starts to increase until it reaches the voltage meeting the requirement of transmitting data.
Optionally, the switch control unit 311a of the above embodiment is a finite state machine FSM.
To sum up, in the embodiment of the present application, the modem obtains indication information indicating whether the terminal has data to be transmitted in each subsequent time period, and when the terminal has no data to be transmitted in a subsequent time period (that is, a second time period), the modem may indicate the switch control unit in the power control component to transmit the first turn-off signal to the PMIC, so that the PMIC stops supplying power to the ET, thereby stopping the ET from supplying power to the power amplifier, avoiding that the power amplifier of the transmitter continuously consumes power when the transmitter is in an idle state, and thus reducing power consumption of the terminal.
When a dedicated control unit is provided in the control circuit to control the stop and start of power supply to the power amplifier, please refer to fig. 5, which shows a schematic diagram of a control circuit structure of a power amplifier according to an exemplary embodiment of the present application. As shown in fig. 5, the control circuit is used in a terminal 50, and includes: a modem 510, a power control component 511, and a power amplifier 512;
the power control component 511 includes: a switch control unit 511a, a power management integrated circuit PMIC511b and an envelope tracker ET511 c;
the modem 510 is electrically connected to the switch control unit 511a, the switch control unit 511a is electrically connected to the ET511c, and the PMIC511b is electrically connected to the power supply 513 of the terminal and the ET511c, respectively; the ET511c is electrically connected to the power amplifier 512;
the modem is configured to acquire data indication information to be sent, where the data indication information to be sent is used to indicate whether a terminal has data to send in each subsequent time period.
The modem is used for sending a first indication signal to the power supply control component when the power supply control component receives power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period.
The power supply control component is used for stopping supplying power to the power amplifier when receiving the first indication signal.
The modem is further used for sending a second indication signal to the power supply control component after the power supply control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
the power supply control component is used for starting to supply power to the power amplifier when receiving the second indication signal.
When the modem 510 sends the first indication signal to the power control component 511, the modem 510 is configured to receive the power supply from the power control component 511 and supply power to the power amplifier 512, and when the terminal has no data to send in a subsequent first time period, send the first indication signal to the switch control unit 511 a;
the switch control unit 511a is configured to control the ET511c to stop supplying power to the power amplifier 512 when receiving the first indication signal;
when the modem 510 sends the second indication signal to the power control component 511, the modem 510 is configured to send the second indication signal to the switch control unit 511a after the power control component 511 stops supplying power to the power amplifier 512 and when the terminal has data to send in a subsequent second time period;
the switch control unit 511a is configured to control the ET511c to start supplying power to the power amplifier 512 when receiving the second indication signal.
The operation principle of the modem 510 is similar to that of the above embodiments, and is not described herein again. When the switch control unit 511a in the control circuit receives the first indication signal and the second indication signal, the corresponding response results are different, specifically, when the switch control unit 511a receives the first indication signal, the response is to control the ET511c to stop supplying power to the power amplifier 512; when the switch control unit 511a receives the second instruction signal, it responds to control the ET511c to start supplying power to the power amplifier 512.
Optionally, when the switch control unit 511a controls the ET511c to stop supplying power to the power amplifier 512, the switch control unit 511a is specifically configured to send a second turn-off signal to the ET511c when receiving the first indication signal, where the second turn-off signal is used to trigger the ET511c to turn off;
when controlling the ET511c to start supplying power to the power amplifier 512, the switch control unit 511a is specifically configured to send a second turn-on signal to the ET511c when receiving the second indication signal, where the second turn-on signal is used to trigger the ET511c to turn on.
Specifically, the modem 510 is further electrically connected to the ET511c, and is configured to receive the envelope size sent by the data calculation unit of the modem 510 in the foregoing embodiment, and the ET511c calculates the voltage required to be provided to the power amplifier 512 according to the envelope size through a preset calculation rule. For example, ET511c includes an output voltage control unit, and a developer or an operation and maintenance person sets a calculation rule of the output voltage in advance in the output voltage control unit (for example, U ═ a ═ b ═ c-2C × E, where U represents the output voltage, E represents the envelope size, and a, C are constant parameters), after ET511C receives the envelope size sent by the data calculation unit, the output voltage can be calculated according to the above formula, so as to control the operating voltage of the power amplifier 512.
In this embodiment of the present application, when the ET is controlled to stop supplying power to the power amplifier, the switch control unit may directly control the ET to be turned off, at this time, the ET is actively turned off, and the power amplifier is passively turned off because the power amplifier cannot receive the electric energy input.
Optionally, when the modem sends the second indication signal to the switch control unit, the modem is specifically configured to send the second indication signal to the switch control unit before the second time period and at a time when a time length between a starting time of the second time period and a starting time of the second time period is a second preset time length;
wherein the second preset duration is set according to a predicted duration from sending the second indication signal to the power amplifier reaching a preset voltage.
The determination manner of the second preset duration is similar to the determination manner of the first preset duration in the embodiment shown in fig. 3, and details are not repeated here.
Optionally, the switch control unit 511a is further electrically connected to the processor 514 of the terminal 50;
the switch control unit 511a is configured to turn on when receiving a third on signal sent by the processor 514, and turn off when receiving a third off signal sent by the processor 514;
the third on signal is a signal sent by the processor 514 when it is detected that the current network service of the terminal 50 is the designated service, and the third off signal is a signal sent by the processor 514 when it is detected that the current network service of the terminal 50 is the non-designated service.
Specifically, please refer to fig. 6, which shows a schematic diagram of a control circuit structure of a power amplifier according to an embodiment of the present application. As shown in fig. 6, the terminal 50 includes a modem 510, a power control component 511, a power amplifier 512, a power supply 513, and a processor 514;
the power control component 511 comprises a switch control unit 511a, a power management integrated circuit PMIC511b and an envelope tracker ET511 c;
in the figure, the processor 514 can detect a service currently executed in the terminal 50, and determine whether the service type is a designated service, and if the determination result is yes, send a third open signal to the switch control unit 511a, and the switch control unit 511a is opened when receiving the third open signal, so as to receive the first indication signal sent by the modem 510, and complete the subsequent control; if the determination result is negative, the processor 514 sends a third close signal to the switch control unit 511a, the switch control unit 511a closes when receiving the third close signal, and the switch control unit 511a stops operating. Taking the designated service as the network voice call as an example, when the terminal 50 performs the network voice call, the processor 514 sends a third open signal to the switch control unit 511a, so that the switch control unit 511a starts to operate, and the power amplifier 512 is controlled during the network voice call, thereby achieving the effect of saving energy.
It should be noted that, an alternative that the switch control unit 511a is electrically connected to the processor 514 of the terminal 50 may also be used in the embodiment shown in fig. 3, and the switch control unit 311a is controlled by the processor, and the detailed process is shown in this embodiment and is not described herein again.
The processor may be a baseband processor in the terminal, or the processor may also be a central processing unit in the terminal.
Optionally, the switch control unit 511a of the above embodiment is a finite state machine FSM.
To sum up, in the embodiment of the present application, the modem is used to obtain indication information indicating whether the terminal has data to send in each subsequent time period, and when the terminal has no data to send in a subsequent certain time period (that is, a second time period), the modem can indicate the switch control unit in the power control component to send a second off signal to the ET, so that the ET stops supplying power to the power amplifier, continuous power consumption of the power amplifier of the transmitter when the transmitter is in an idle state is avoided, and power consumption of the terminal is reduced.
When stopping and starting power supply to a power amplifier is controlled by an existing device, please refer to fig. 7, which shows a schematic diagram of a control circuit structure of a power amplifier according to an exemplary embodiment of the present application. As shown in fig. 7, the control circuit is used in a terminal 70, and includes: a modem 710, a power control component 711, and a power amplifier 712;
the power control component 711 includes PMIC 711a and ET711 b;
the modem 710 is electrically connected to the power source 713 and the ET711b of the terminal, respectively, and the ET711b is electrically connected to the power amplifier 712;
the modem is configured to acquire data indication information to be sent, where the data indication information to be sent is used to indicate whether a terminal has data to send in each subsequent time period.
The modem is used for sending a first indication signal to the power supply control component when the power supply control component receives power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period.
The power supply control component is used for stopping supplying power to the power amplifier when receiving the first indication signal.
The modem is further used for sending a second indication signal to the power supply control component after the power supply control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
the power supply control component is used for starting to supply power to the power amplifier when receiving the second indication signal.
PMIC 711a is also coupled to ET711b, and PMIC 711a is configured to provide power to ET711 b.
When the modem 710 sends a first indication signal to the power control component 711, the modem 710 is configured to send the first indication signal to the ET711b when the power control component 711 receives power from the power supply and supplies power to the power amplifier 712, and when no data is sent in a subsequent first time period;
the ET711b is configured to stop supplying power to the power amplifier 712 when receiving the first indication signal;
when the modem 710 sends the second indication signal to the power control component 711, the modem 710 is configured to send the second indication signal to the ET711b after the power control component 711 stops supplying power to the power amplifier 712 and when the terminal has data to send in a subsequent second time period;
the ET711b is configured to start supplying power to the power amplifier 712 when receiving the second indication signal.
Similarly, the operation principle of the modem 710 is similar to that of the above-mentioned embodiment, and is not described herein again. In the control circuit, the ET711b directly receives the first indication signal and the second indication signal sent by the modem 710, and specifically, when the ET711b receives the first indication signal, the power supply to the power amplifier 712 is stopped; the ET711b, upon receiving the second indication signal, responds by enabling power to the power amplifier 712. That is, in the embodiment of the present application, the ET may control to stop or start the power supply to the power amplifier, in addition to the voltage magnitude of the power supply to the power amplifier.
Optionally, the modem 710 is further electrically connected to the processor 714 of the terminal 70;
the modem 710 is configured to turn on a control circuit of the power control module 711 when receiving a third on signal sent by the processor 714, and turn off the control circuit of the power control module 711 when receiving a third off signal sent by the processor 714;
the third open signal is a signal sent by the processor 714 when it is detected that the current network service of the terminal 70 is the designated service, and the third close signal is a signal sent by the processor 714 when it is detected that the current network service of the terminal 70 is the non-designated service.
Specifically, please refer to fig. 8, which shows a schematic structural diagram of a control circuit of a power amplifier according to an embodiment of the present application. As shown in fig. 8, terminal 70 includes a modem 710, a power control component 711, a power amplifier 712, a power supply 713, and a processor 714;
the power control module 711 includes a power management integrated circuit PMIC 711a and an envelope tracker ET711 b;
in the figure, the processor may detect a service currently executed in the terminal 70, and determine whether the service type is a specific service, if the determination result is yes, send a third open signal to the modem 710, and when the modem 710 receives the third open signal, turn on a control circuit of the power control component 711, so that the modem 710 sends a first indication signal to complete subsequent control; if the determination result is no, the processor sends a third shutdown signal to the modem 710, and when the modem 710 receives the third shutdown signal, the control circuit of the power control module 711 is shut down, and the modem 710 stops the process of sending the signal to the power control module 711. Taking the specified service as the network voice call as an example, when the terminal 70 performs the network voice call, the processor sends a third open signal to the modem 710 to enable the modem 710 to start sending a signal to the power control component 711, and when the network voice call is ended, the processor sends a third close signal to the modem 710 to enable the modem 710 to stop sending a signal to the power control component 711, so as to control the power amplifier 712, thereby achieving the effect of saving energy.
It should be noted that, alternatively, the modem 710 is electrically connected to the processor 714 of the terminal 70, and may also be used in the embodiments shown in fig. 3 and fig. 5, and the control of the switch control unit 311a and the switch control unit 511a is completed by respective processors, and the detailed process is shown in this embodiment and is not described herein again.
To sum up, in the embodiment of the present application, the modem is used to obtain indication information indicating whether the terminal has data to send in each subsequent time period, and when the terminal has no data to send in a subsequent certain time period (i.e., a second time period), the modem can indicate the ET in the power control component to stop supplying power to the power amplifier, so that the power amplifier of the transmitter is prevented from continuously consuming power when the transmitter is in an idle state, and power consumption of the terminal is reduced.
The embodiment of the application also provides a terminal, and the terminal comprises a control circuit of at least one power amplifier. The control circuit may be the control circuit of the power amplifier described in any of the various embodiments above.
Referring to fig. 9, a flowchart of a method for controlling a power amplifier according to an exemplary embodiment of the present application is shown, where the method is performed by a modem in a control circuit of the power amplifier, the control circuit further includes a power supply control component and the power amplifier; the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, the power supply control assembly is electrically connected with a power supply of the terminal, and the power supply control assembly receives the power supply of the power supply; the method comprises the following steps:
step 901, acquiring indication information of data to be transmitted.
The data indication information to be sent is used for indicating whether the terminal has data to send in each subsequent time period.
Optionally, the modem obtains the baseband I/Q signal according to information transmitted from the terminal. Specifically, please refer to fig. 10, which shows a schematic diagram of a signal image according to an embodiment of the present application, as shown in fig. 10, which includes an X axis, a Y axis, and a Z axis. The X-axis represents time in characters (1-character 66.7us), the Y-axis represents frequency in hertz, the Z-axis represents level, 0 represents low, and 1 represents high.
The Modulation unit in the modem may modulate the information shown in fig. 10, for example, the Modulation unit generates an I signal and a Q signal by a Quadrature Amplitude Modulation (QAM) method. The signal modulation unit may transmit the modulated I signal and Q signal to a data calculation unit and a data analysis unit, wherein the data calculation unit calculates an envelope size of the signal.
The data analysis unit analyzes the obtained I signal and Q signal to obtain data information of the I signal and Q signal in each time period, and the modem acquires the indication information of the data to be transmitted according to the data information and the corresponding time period.
Step 902, when the power control module receives power from the power source and supplies power to the power amplifier, and the terminal has no data to transmit in the subsequent first time period, a first indication signal is transmitted to the power control module.
The first indication signal is used for indicating the power control component to stop supplying power to the power amplifier.
Step 903, after the power control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, a second indication signal is sent to the power control component.
Wherein the second indication signal is used for indicating the power control component to start supplying power to the power amplifier.
Specifically, the modem selects whether to send a first indication signal and a second indication signal according to the acquired indication information of the data to be sent. Such as: according to the data obtained by the data analysis unit, under the condition that the values of the I signal and the Q signal in the first time period are both equal to 0, that is, the terminal is analyzed to have no data transmission in the subsequent first time period, the modem selects to transmit the first indication signal to the power control component. And under the condition that the values of the I signal and the Q signal in the second time period are not equal to 0, analyzing that the terminal has data to send in the subsequent second time period, and sending a second indicating signal to the switch control unit.
In one possible implementation, the power control component includes a power management integrated circuit PMIC and an envelope tracker ET.
Optionally, the modem is electrically connected to the power supply of the terminal and the ET, respectively, and the ET is electrically connected to the power amplifier.
Optionally, when the power control component receives power supplied by the power supply and supplies power to the power amplifier, and the terminal has no data to transmit in a subsequent first time period, the modem transmits the first indication signal to the ET; the first indication signal is used for indicating the ET to stop supplying power to the power amplifier.
Specifically, after the ET receives the first indication signal, the ET is triggered to be turned off, and then the power amplifier is stopped from being supplied with power.
Optionally, after the power control module stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, the modem sends the second indication signal to the ET; the second indication signal is used for indicating the ET to start supplying power to the power amplifier.
Specifically, after receiving the second indication signal, the ET is triggered to turn on, and then the power amplifier starts to be powered.
In another possible implementation, the power control component includes a switch control unit, a power management integrated circuit PMIC, and an envelope tracker ET.
Optionally, the modem is electrically connected to the switch control unit, the switch control unit is electrically connected to the PMIC, and the PMIC is electrically connected to the power supply of the terminal and the ET, respectively.
Optionally, when the power control module receives power supply from the power supply and supplies power to the power amplifier, and the terminal has no data to send in a subsequent first time period, the modem unit sends the first indication signal to the switch control unit; the first indication signal is specifically used for indicating the switch control unit to control the PMIC to stop supplying power to the ET.
Optionally, after the switch control unit receives the first indication signal, the switch control unit sends a first turn-off signal to the PMIC, and when the PMIC receives the first turn-off signal, the PMIC is triggered to turn off.
Specifically, when the PMIC is turned off, the PMIC stops supplying power to the ET, so that the ET stops operating, the ET stops supplying power to the power amplifier, and finally the power amplifier stops operating.
Optionally, after the power supply control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, the modulation and demodulation unit sends the second indication signal to the switch control unit; the second indication signal is specifically used for indicating the switch control unit to control the PMIC to start to supply power to the ET.
Optionally, after the switch control unit receives the second indication signal, the switch control unit sends a first start signal to the PMIC, and after the PMIC receives the first start signal, the PMIC is triggered to start.
Specifically, when the PMIC is turned on, the PMIC starts to supply power to the ET, so that the ET starts to operate, and the power amplifier is supplied with power through the ET.
Optionally, before the second time period and at a time when a time length from a start time of the second time period is a first preset time length, the modem sends the second indication signal to the switch control unit.
Wherein the first preset duration is set according to a predicted duration from the sending of the second indication signal to the power amplifier reaching a preset voltage.
In yet another possible implementation, the power control component includes a finite state machine switch control unit, a power management integrated circuit PMIC, and an envelope tracker ET.
The modem is electrically connected with the switch control unit, the switch control unit is electrically connected with the ET, and the PMIC is respectively electrically connected with a power supply of the terminal and the ET; the ET is electrically connected to the power amplifier.
Optionally, when the power control module receives power from the power supply and supplies power to the power amplifier, and the terminal has no data to send in a subsequent first time period, the modem performs the step of sending the first indication signal to the switch control unit; the first indication signal is used for indicating the switch control unit to control the ET to stop supplying power to the power amplifier.
Optionally, after receiving the first indication signal, the switch control unit sends a second turn-off signal to the ET, and after receiving the second turn-off signal, the ET is triggered to turn off.
Specifically, after the ET is turned off, the power amplifier is turned off by stopping power supply to the power amplifier.
Optionally, after the power control module stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, the modem sends the second indication signal to the switch control unit; the second indication signal is used for indicating the switch control unit to control the ET to start supplying power to the power amplifier.
Optionally, after the switch control unit receives the second indication signal, the switch control unit sends a second start signal to the ET, and after the ET receives the second start signal, the ET is triggered to start.
Specifically, after the ET is turned on, power supply to the power amplifier is started, and the power amplifier is turned on.
Optionally, the switch control unit is electrically connected to the processor of the terminal; the method further comprises the following steps:
the switch control unit receives a third opening signal sent by the processor.
Specifically, the switch control unit is turned on when receiving a third on signal sent by the processor.
The switch control unit receives a third closing signal sent by the processor.
Specifically, the switch control unit is turned off when receiving a third off signal sent by the processor.
The third on signal is a signal sent by the processor when the processor detects that the current network service of the terminal is the designated service, and the third off signal is a signal sent by the processor when the processor detects that the current network service of the terminal is the non-designated service.
Specifically, the processor may detect a service currently executed in the terminal, and determine whether the service type is a designated service, if the determination result is yes, send a third open signal to the switch control unit, and the switch control unit is opened when receiving the third open signal, so as to receive the first indication signal sent by the modem and execute the subsequent steps; if the judgment result is negative, the processor sends a third closing signal to the switch control unit, the switch control unit is closed when receiving the third closing signal, and the switch control unit stops working. Taking the designated service as the network voice call as an example, when the terminal performs the network voice call, the processor sends a third opening signal to the switch control unit, so that the switch control unit starts to operate, and the control step of the power amplifier during the network voice call is executed, thereby achieving the effect of saving energy.
Optionally, the switch control unit is a finite state machine FSM.
To sum up, in the embodiment of the present application, the modem is used to obtain indication information indicating whether the terminal has data to send in each subsequent time period, and when the terminal has no data to send in a subsequent certain time period (i.e., a second time period), the modem can indicate the power control component to stop supplying power to the power amplifier, so that the power amplifier of the transmitter is prevented from continuously consuming power when the transmitter is in an idle state, and power consumption of the terminal is reduced.
It should be noted that: in the control circuit and the method provided by the above embodiments, when the power amplifier is turned on or turned off, only the division of the functions of the circuit modules or units is taken as an example, and in practical applications, the functions may be distributed to different functional modules or units according to needs, that is, the internal structure of the device may be divided into different functional modules or units to complete all or part of the functions described above.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (16)

1. A control circuit for a power amplifier, the control circuit being for use in a terminal, the control circuit comprising: a modem, a power supply control component and the power amplifier; the power control assembly includes: the power management circuit comprises a switch control unit, a power management integrated circuit PMIC and an envelope tracker ET;
the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, and the power supply control assembly is electrically connected with a power supply of the terminal;
the modem is used for acquiring indication information of data to be sent, and the indication information of the data to be sent is used for indicating whether the terminal has data to send in each subsequent time period;
the modem is used for sending a first indication signal to the power supply control component when the power supply control component receives power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period;
the power supply control component is used for stopping supplying power to the power amplifier when the first indication signal is received;
the modem is further configured to send a second indication signal to the power supply control component after the power supply control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
the power supply control component is used for starting to supply power to the power amplifier when receiving the second indication signal;
the modem is electrically connected with the switch control unit, the switch control unit is electrically connected with the PMIC, and the PMIC is electrically connected with a power supply of the terminal and the ET respectively; the ET is electrically connected with the power amplifier;
when sending a first indication signal to the power control component, the modem is specifically configured to send the first indication signal to the switch control unit when the power control component receives power supply from the power supply and supplies power to the power amplifier, and when the terminal has no data to send in a subsequent first time period;
the switch control unit is used for controlling the PMIC to stop supplying power to the ET when the first indication signal is received;
when sending a second indication signal to the power control component, the modem is configured to send the second indication signal to the switch control unit after the power control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
and the switch control unit is used for controlling the PMIC to start supplying power to the ET when receiving the second indication signal.
2. The control circuit of claim 1,
when the PMIC is controlled to stop supplying power to the ET, the switch control unit is specifically configured to send a first turn-off signal to the PMIC when the first indication signal is received, where the first turn-off signal is used to trigger the PMIC to turn off;
when the PMIC is controlled to start to supply power to the ET, the switch control unit is specifically configured to send a first start signal to the PMIC when the second indication signal is received, where the first start signal is used to trigger the PMIC to start.
3. The control circuit of claim 1, wherein when the second indication signal is sent to the switch control unit,
the modem is specifically configured to send the second indication signal to the switch control unit before the second time period and at a time when a time length between the second time period and a start time of the second time period is a first preset time length;
wherein the first preset duration is set according to a predicted duration from sending the second indication signal to the power amplifier reaching a preset voltage.
4. The control circuit of claim 1, wherein the power control component comprises: a switch control unit, PMIC and ET;
the modem is electrically connected with the switch control unit, the switch control unit is electrically connected with the ET, and the PMIC is respectively electrically connected with a power supply of the terminal and the ET; the ET is electrically connected with the power amplifier;
when the first indication signal is sent to the power supply control component, the modem is used for sending the first indication signal to the switch control unit when the power supply control component receives the power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period;
the switch control unit is used for controlling the ET to stop supplying power to the power amplifier when receiving the first indication signal;
when sending a second indication signal to the power control component, the modem is configured to send the second indication signal to the switch control unit after the power control component stops supplying power to the power amplifier and when the terminal has data to send in a subsequent second time period;
and the switch control unit is used for controlling the ET to start supplying power to the power amplifier when receiving the second indication signal.
5. The control circuit of claim 4,
when the ET is controlled to stop supplying power to the power amplifier, the switch control unit is specifically configured to send a second turn-off signal to the ET when receiving the first indication signal, where the second turn-off signal is used to trigger the ET to turn off;
when controlling the ET to start supplying power to the power amplifier, the switch control unit is specifically configured to send a second start signal to the ET when receiving the second indication signal, where the second start signal is used to trigger the ET to start.
6. The control circuit according to any of claims 1 to 5, wherein the switch control unit is further electrically connected to the processor of the terminal;
the switch control unit is used for being turned on when a third opening signal sent by the processor is received and turned off when a third closing signal sent by the processor is received;
the third on signal is a signal sent by the processor when it is detected that the current network service of the terminal is the designated service, and the third off signal is a signal sent by the processor when it is detected that the current network service of the terminal is the non-designated service.
7. The control circuit according to any of claims 1 to 5, wherein the switch control unit is a Finite State Machine (FSM).
8. The control circuit of claim 1, wherein the power control component comprises a PMIC and an ET;
the modem is electrically connected with a power supply of the terminal and the ET respectively, and the ET is electrically connected with the power amplifier;
when the first indication signal is sent to the power control component, the modem is used for sending the first indication signal to the ET when the power control component receives the power supply of the power supply and supplies power to the power amplifier and the terminal does not send data in a subsequent first time period;
the ET is used for stopping supplying power to the power amplifier when the first indication signal is received;
when sending a second indication signal to the power control component, the modem is configured to send the second indication signal to the ET when the power control component stops supplying power to the power amplifier and the terminal has data to send in a subsequent second time period;
and the ET is used for starting to supply power to the power amplifier when receiving the second indication signal.
9. A method of controlling a power amplifier, the method being performed by a modem in a control circuit of the power amplifier, the control circuit further comprising a power supply control component and the power amplifier; the power supply control component comprises a switch control unit, a Power Management Integrated Circuit (PMIC) and an envelope tracker ET; the modem is electrically connected with the switch control unit, the switch control unit is electrically connected with the PMIC, and the PMIC is respectively electrically connected with a power supply of a terminal and the ET; the modem is electrically connected with the power supply control assembly, the power supply control assembly is electrically connected with the power amplifier, the power supply control assembly is electrically connected with a power supply of the terminal, and the power supply control assembly receives power supply of the power supply; the method comprises the following steps:
acquiring indication information of data to be sent, wherein the indication information of the data to be sent is used for indicating whether the terminal has data to send in each subsequent time period;
when the power supply control assembly receives power supply of the power supply and supplies power to the power amplifier, and the terminal does not send data in a subsequent first time period, sending a first indication signal to the power supply control assembly; the first indication signal is used for indicating the power supply control component to stop supplying power to the power amplifier;
after the power supply control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, sending a second indication signal to the power supply control component; the second indication signal is used for indicating the power supply control component to start supplying power to the power amplifier;
the sending a first indication signal to the power control component includes:
when the power supply control assembly receives power supply of the power supply and supplies power to the power amplifier, and the terminal does not send data in a subsequent first time period, the power supply control assembly sends the first indication signal to the switch control unit; the first indication signal is specifically configured to instruct the switch control unit to control the PMIC to stop supplying power to the ET;
the sending a second indication signal to the power control component includes:
after the power supply control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, sending the second indication signal to the switch control unit; the second indication signal is specifically used for indicating the switch control unit to control the PMIC to start to supply power to the ET.
10. The method of claim 9,
the first indication signal is specifically configured to instruct the switch control unit to send a first turn-off signal to the PMIC, where the first turn-off signal is used to trigger the PMIC to turn off;
the second indication signal is specifically used for indicating the switch control unit and sending a first starting signal to the PMIC, and the first starting signal is used for triggering the PMIC to be started.
11. The method of claim 9, wherein said sending the second indication signal to the switch control unit comprises:
before the second time period and at the time when the time length between the starting time of the second time period and the starting time of the second time period is a first preset time length, sending the second indication signal to the switch control unit;
wherein the first preset duration is set according to a predicted duration from sending the second indication signal to the power amplifier reaching a preset voltage.
12. The method of claim 9, wherein the power control components comprise a finite state machine switch control unit, a Power Management Integrated Circuit (PMIC), and an Envelope Tracker (ET);
the modem is electrically connected with the switch control unit, the switch control unit is electrically connected with the ET, and the PMIC is respectively electrically connected with a power supply of the terminal and the ET; the ET is electrically connected with the power amplifier;
the sending a first indication signal to the power control component includes:
when the power supply control assembly receives power supply of the power supply and supplies power to the power amplifier, and the terminal does not send data in a subsequent first time period, the power supply control assembly sends the first indication signal to the switch control unit; the first indication signal is used for indicating the switch control unit to control the ET to stop supplying power to the power amplifier;
the sending a second indication signal to the power control component includes:
after the power supply control component stops supplying power to the power amplifier, and when the terminal has data to send in a subsequent second time period, sending the second indication signal to the switch control unit; the second indication signal is used for indicating the switch control unit to control the ET to start supplying power to the power amplifier.
13. The method of claim 12,
the first indication signal is specifically configured to instruct the switch control unit to send a second turn-off signal to the ET, where the second turn-off signal is used to trigger the ET to turn off;
the second indication signal is specifically configured to instruct the switch control unit to send a second start signal to the ET, where the second start signal is used to trigger the ET to start.
14. The method according to any of the claims 10 to 13, characterized in that the switch control unit is a finite state machine FSM.
15. The method of claim 9 wherein the power control components comprise a Power Management Integrated Circuit (PMIC) and an Envelope Tracker (ET);
the modem is electrically connected with a power supply of the terminal and the ET respectively, and the ET is electrically connected with the power amplifier;
the sending a first indication signal to the power control component includes:
when the power supply control component receives power supply of the power supply and supplies power to the power amplifier, and the terminal does not send data in a subsequent first time period, sending the first indication signal to the ET; the first indication signal is used for indicating the ET to stop supplying power to the power amplifier;
the sending a second indication signal to the power control component includes:
after the power supply control component stops supplying power to the power amplifier, and the terminal has data to send in a subsequent second time period, sending the second indication signal to the ET; the second indication signal is used for indicating the ET to start supplying power to the power amplifier.
16. A terminal, characterized in that the terminal comprises a control circuit for a power amplifier according to any of claims 1 to 8.
CN201811109076.2A 2018-09-21 2018-09-21 Control circuit and control method of power amplifier and terminal Active CN109068379B (en)

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