CN112653400B - Amplifier circuit, control method thereof, electronic device, and storage medium - Google Patents

Amplifier circuit, control method thereof, electronic device, and storage medium Download PDF

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CN112653400B
CN112653400B CN202011455069.5A CN202011455069A CN112653400B CN 112653400 B CN112653400 B CN 112653400B CN 202011455069 A CN202011455069 A CN 202011455069A CN 112653400 B CN112653400 B CN 112653400B
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signal
module
power supply
power
boosting
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CN112653400A (en
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陈刚
李应伟
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Oppo Chongqing Intelligent Technology Co Ltd
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Oppo Chongqing Intelligent Technology Co Ltd
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32Modifications of amplifiers to reduce non-linear distortion
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56Modifications of input or output impedances, not otherwise provided for
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K7/00Modulating pulses with a continuously-variable modulating signal
    • H03K7/08Duration or width modulation ; Duty cycle modulation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

The present disclosure relates to the technical field of electronic devices, and in particular, to an amplifying circuit, a control method thereof, an electronic device, and a storage medium, where the amplifying circuit includes: the power supply comprises an input module, a control module, a power supply module, a boosting module and a power amplification module, wherein the input module is used for receiving an input signal; the control module is connected with the input module and used for outputting a control signal according to the input signal; the power supply module is used for outputting a plurality of power supply signals, and the voltages of the power supply signals are different; the boosting unit is used for responding to the control signal and selectively boosting one power supply signal in a plurality of power supply signals so as to obtain the amplified power supply signal; the power amplification module is respectively connected with the input module and the boosting module, and responds to the amplification power supply signal to amplify the input signal.

Description

Amplifier circuit, control method thereof, electronic device, and storage medium
Technical Field
The present disclosure relates to the field of electronic devices, and in particular, to an amplifying circuit, a control method thereof, an electronic device, and a storage medium.
Background
Various signals in the electronic equipment often need to be amplified through a power amplifying circuit during transmission, such as audio signals. At present, a power supply signal of the power amplifying circuit may be provided by a boosting module connected to a power supply, and a voltage of the power supply connected to the boosting module is usually a fixed voltage. When the power supply signal with the fixed voltage supplies power to the boosting module to cause the output signal power to be larger, the boosting module has the problem of low conversion efficiency, and then the power consumption of the electronic equipment is increased.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide an amplifying circuit, a control method thereof, an electronic device, and a storage medium, thereby reducing power consumption of the electronic device at least to some extent.
According to a first aspect of the present disclosure, there is provided an amplification circuit comprising:
an input module for receiving an input signal;
the control module is connected with the input module and used for outputting a control signal according to the input signal and a voltage mapping relation, and the voltage mapping relation comprises a mapping relation between the input signal and an amplified power supply signal;
the boosting unit is used for boosting the power supply signal according to the control signal so as to obtain the amplified power supply signal;
the power amplification module is respectively connected with the input module and the boosting module, and responds to the amplified power supply signal to amplify the input signal.
According to a second aspect of the present disclosure, there is provided a control method of an amplification circuit, the control method including:
determining a control signal according to an input signal and a voltage mapping relation, wherein the voltage mapping relation comprises the mapping relation of the input signal and an amplification power supply signal;
controlling a boosting module to boost a power supply signal by using the control signal to obtain an amplified power supply signal;
and controlling the power amplification module to amplify and output the input signal by using the amplified power supply signal.
According to a third aspect of the present disclosure, there is provided an electronic apparatus including the above-described amplification circuit.
According to a fourth aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method according to any one of the above.
According to the amplifying circuit provided by the embodiment of the disclosure, the control module outputs the control signal according to the input signal, the boosting module responds to the control signal to amplify the first power signal or amplify the first power signal, and power amplification is performed on power through the amplified power signal, so that the input power signal voltage of the boosting module is determined according to the input signal, the problem that the power signal voltage cannot be adjusted according to the input signal is solved, the conversion efficiency of the boosting module can be improved, and the power consumption of the electronic device is reduced.
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 disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic block diagram of a power supply of an electronic device provided by an exemplary embodiment of the present disclosure;
fig. 2 is a schematic block diagram of a first amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 3 is a schematic block diagram of a second amplification circuit provided in an exemplary embodiment of the present disclosure;
fig. 4 is a schematic block diagram of a third amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 5 is a schematic block diagram of a fourth amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 6 is a schematic block diagram of a fifth amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 7 is a schematic block diagram of a sixth amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 8 is a schematic block diagram of a seventh amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 9 is a schematic block diagram of an eighth amplifying circuit provided in an exemplary embodiment of the present disclosure;
fig. 10 is a schematic block diagram of a first audio signal amplification provided by an exemplary embodiment of the present disclosure;
fig. 11 is a schematic block diagram of a second audio signal amplification provided by an exemplary embodiment of the present disclosure;
fig. 12 is a flowchart of a control method of an amplifying circuit according to an exemplary embodiment of the present disclosure;
fig. 13 is a schematic block diagram of an electronic device provided by an exemplary embodiment of the present disclosure;
fig. 14 is a schematic diagram of a computer-readable storage medium according to an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
The amplifying circuit provided by the embodiment of the disclosure can be used in electronic equipment such as a mobile phone, and as shown in fig. 1, a battery 01 is arranged in the electronic equipment to provide power for devices in the electronic equipment. In order to increase the charging speed of the battery in the related art, the battery may include a plurality of cells connected in series. The voltage output by the plurality of series-connected battery cores is nVbat, n is the number of the battery cores, and Vbat is the voltage of a single battery core. When the battery comprises a plurality of cells connected in series, a voltage reduction circuit 02 may be disposed between the battery 01 and the power consumption terminal 03, and the voltage reduction circuit is configured to reduce the voltage of nbbat output by the battery to Vbat.
The exemplary embodiments of the present disclosure first provide an amplifying circuit, as shown in fig. 2, the amplifying circuit including: the power supply comprises an input module 110, a control module 120, a power supply module 130, a boosting module 140 and a power amplification module 150, wherein the input module 110 is used for receiving an input signal; the control module 120 is connected to the input module 110, and the control module 120 is configured to output a control signal according to the input signal; the power module 130 is configured to output a plurality of power signals, where the voltages of the plurality of power signals are different; the boosting module 140 is connected to the control module 120 and the power module 130, and the boosting unit is configured to selectively boost one of the plurality of power signals in response to the control signal to obtain an amplified power signal; the power amplification module 150 is respectively connected to the input module 110 and the boost module 140, and the power amplification module 150 amplifies the input signal in response to the amplified power signal.
According to the amplifying circuit provided by the embodiment of the disclosure, the control module 120 outputs a control signal according to an input signal, the boosting module 140 responds to the control signal to amplify the first power signal or amplify the first power signal, and power is amplified and supplied to the power through the amplified power signal, so that the voltage of the power signal input by the boosting module 140 is determined according to the input signal, the problem that the voltage of the power signal cannot be adjusted according to the input signal is solved, the conversion efficiency of the boosting module 140 can be improved, and the power consumption of electronic equipment is reduced.
The input signal may be an audio signal, and the amplifying circuit provided in the embodiments of the present disclosure may be an audio amplifying circuit. Of course, in practical applications, the input signal may also be a radio frequency signal, a processor driving signal, or other signals that need to be amplified, and the embodiments of the present disclosure are not limited thereto.
Further, as shown in fig. 3, the amplifying circuit provided in the embodiment of the present disclosure may further include an oscillation module 160, where the oscillation module 160 is connected to the boosting module 140 and the power amplifying module 150, respectively, and the oscillation module 160 is configured to provide an oscillation signal to the power amplifying module 150.
The following will describe each part of the amplifying circuit provided by the embodiments of the present disclosure in detail:
the amplifying circuit provided by the embodiment of the present disclosure may be integrated in a chip, and the input module 110 may include an input signal pin, and the input signal pin may be connected to an input signal source. For example, when the input signal is an audio signal, the input pin may be connected to an audio signal source, or when the input signal is a radio frequency signal, the input pin may be connected to a radio frequency generating circuit. Certainly, in practical applications, each part of the amplifying circuit provided in the embodiment of the present disclosure may be respectively disposed on different chips or circuit boards, and at this time, the input module 110 may also be a signal receiving structure or device such as a connection port, which is not limited to this.
As shown in fig. 4, the input module 110 may further include an input buffer unit 111, the input buffer unit 111 is connected to the input pin and power amplification module 150, and the input buffer unit 111 is configured to buffer an input signal and transmit the buffered input signal to the power amplification module 150. For example, when the input signal is an audio signal, the audio signal enters the input buffer unit 111 through the input pin.
The power module 130 is capable of outputting a plurality of power signals, which have different voltages. When a battery of the electronic equipment comprises a plurality of battery cells connected in series, the voltage directly output by the battery is nVbat, and the voltage output by the voltage reduction circuit can be (n-1) Vbat \8230andVbat. That is, the power module 130 can output N power signals, and the voltages of the N power signals can be nbbat, (N-1) Vbat \8230, vbat in sequence. The power module 130 may include a plurality of power pins, the plurality of power pins are respectively connected to the battery and the voltage reduction circuit, and the plurality of power pins respectively receive power signals of different voltages.
The control module 120 may store a voltage mapping relationship, and the control module 120 outputs a control signal according to the input signal and the voltage mapping relationship, where the voltage mapping relationship includes a mapping relationship between the input signal and the amplified power signal. The voltage mapping relationship may be in the form of a function, a table, a curve, or the like.
The boost module 140 may have one or more boost modes, and the control module 120 outputs a control signal according to the amplified power signal corresponding to the input signal, wherein the control signal is used to select a plurality of input power signals and the boost modes, so as to efficiently convert the power signal into the amplified power signal.
For example, when the input signal is an audio signal, the audio signal may be divided into multiple segments according to the intensity (volume) of the audio signal, and each segment corresponds to an amplifying module power signal with one voltage. For example, the highest volume level is 16 levels, the lowest volume level is 0 level (mute), and a 0-16 volume curve (voltage mapping relationship) can be divided into 4 sections through debugging experiments, wherein the 4 sections are respectively 16 levels to X levels (X is less than or equal to 16), X levels to Y levels (Y is less than or equal to X), Y levels to 1 levels (Y is more than or equal to 1) and 0 level (mute).
The voltage mapping relationship comprises: a first section-a first amplified power supply signal (a first power supply signal amplified by the first boosting unit 141), a second section-a second amplified power supply signal (a second power supply signal amplified by the second boosting unit 142), a third section-a third amplified power supply signal (a second power supply signal), and a fourth section-a fourth amplified power supply signal (0V).
Or, the voltage mapping relationship includes: a first section-a first amplified power supply signal (a first power supply signal amplified by the third boosting unit 143), a second section-a second amplified power supply signal (a second power supply signal amplified by the third boosting unit 143), a third section-a third amplified power supply signal (a second power supply signal), and a fourth section-a fourth amplified power supply signal (0V).
As shown in fig. 5, the control module 120 includes: a storage unit 122 and a control unit 121, wherein the storage unit 122 is used for storing a voltage mapping relation; the control unit 121 is respectively connected to the storage unit 122 and the voltage boost module 140, and the control unit 121 receives an input signal and outputs a control signal according to a voltage mapping relationship in the storage unit 122.
The storage unit 122 stores a voltage mapping relationship, and the voltage mapping relationship may be stored in the storage unit 122 in the form of a function, a table, or a curve. The control unit 121 is connected to the input module 110, and the control unit 121 receives the input signal, invokes a voltage mapping relationship, and determines a voltage of a target amplification power supply signal to be provided to the amplification module according to the voltage mapping relationship. The control module 120 selects a corresponding power signal and a boosting mode according to the target amplified power signal, and boosts the selected power signal through the selected boosting mode of the boosting module 140.
In practical applications, the voltage mapping relationship may include mapping relationships between a power supply signal, a boost mode, and an input signal. Namely, for an input signal, the input signal is fixedly corresponding to a power supply signal and a boosting mode, and the power supply signal is boosted through the boosting mode to obtain a target amplification power supply signal.
The plurality of power signals provided by the power module 130 may include a first power signal and a second power signal, and the voltage of the first power signal is greater than the voltage of the second power signal. For example, when the battery of the electronic device includes two cells connected in series, the first power signal may be a power signal (2 Vbat) directly output by the two cells connected in series, and the second power signal may be a power signal (Vbat) output by the half-voltage drop circuit.
In a possible embodiment of the present disclosure, as shown in fig. 6, the boosting module 140 includes: the first boost unit 141 is connected to the control unit 121 and the power amplification module 150, and the first boost unit 141 is configured to boost a first power signal in response to an output control signal and transmit the boosted first power signal to the power amplification module 150; the second voltage boosting unit 142 is respectively connected to the control unit 121 and the power amplifying module 150, and the second voltage boosting unit 142 is configured to boost the second power signal in response to the output control signal and transmit the second power signal to the power amplifying module 150.
On this basis, as shown in fig. 7, the amplifying circuit may further include a second switching unit 170, the second switching unit 170 is respectively connected to the control unit 121 and the power amplifying module 150, and the second switching unit 170 is configured to transmit the second power signal to the power amplifying module 150 in response to the control signal.
The first boosting unit 141 boosts the first power signal and transmits the boosted voltage to the power amplification module 150, and the second boosting unit 142 boosts the second power signal and transmits the boosted voltage to the power amplification module 150. The second switching unit 170 is configured to transmit the second power to the power amplification module 150 without boosting. At this time, the amplified power signal may include four kinds of signals, a first power signal boosted by the first boosting unit 141, a second power signal boosted by the second boosting unit 142, a second power signal, and a 0 voltage signal. The control signal may also include four control signals, a first control signal controls the first boosting unit 141 to operate, a second control signal controls the second boosting unit 142 to operate, a third control signal controls the second switching unit 170 to be turned on, and a fourth control signal turns off the first boosting unit 141, the second boosting unit 142, and the second switch.
It should be noted that the second switch unit 170 may be disposed inside or outside the amplifying circuit package chip, which is not specifically limited in this embodiment of the disclosure.
For example, the input signal is an audio signal, as shown in fig. 10, the highest volume level is 16 levels, and the lowest volume level is 0 level (mute), and through a debugging experiment, a 0-16 volume curve (voltage mapping relationship) is divided into 4 segments, which are respectively 16 levels to X levels (X ≦ 16), X levels to Y levels (Y ≦ X), Y levels to 1 levels (Y ≧ 1), and 0 level (mute).
When detecting that the audio signal is at 16-X level, the control module 120 outputs a first control signal, the first control signal controls the first voltage boosting unit 141 to boost the first power signal, and the second voltage boosting unit 142 and the second switching unit 170 are turned off.
When detecting that the audio signal is at X-Y level, the control module 120 outputs a second control signal, the second control signal controls the second voltage boosting unit 142 to boost the second power signal, and the first voltage boosting unit 141 and the second switching unit 170 are turned off.
When detecting that the audio signal is at level Y-1, the control module 120 outputs a third control signal, the third control signal controls the second switching unit 170 to be turned on, the second power signal is transmitted to the power amplification module 150, and the first boosting unit 141 and the second boosting unit 142 are turned off.
When detecting that the audio signal is at level 0, the control module 120 outputs a fourth control signal, and the fourth control signal controls the first voltage boosting unit 141, the second voltage boosting unit 142, and the second switching unit 170 to be turned on and off.
In another possible embodiment of the present disclosure, as shown in fig. 8 and 9, the amplifying circuit further includes: a first switch unit 180 and a second switch unit 170, the first switch unit 180 connecting the first power signal and the second power signal. The second switching unit 170 is respectively connected to the control unit 121 and the power amplification module 150, and the second switching unit 170 is configured to transmit the second power signal to the power amplification module 150 in response to the control signal.
The boosting module 140 includes a third boosting unit 143, the third boosting unit 143 is connected to the first switching unit 180, the control unit 121, and the power amplifying unit, respectively, and the first switching unit 180 transmits the first power signal or the second power signal to the third boosting unit 143 in response to the control signal.
The first switch unit 180 transmits the first power signal or the second power signal to the third boosting unit 143, and the first power signal or the second power signal is boosted by the third boosting unit 143 and then transmitted to the power amplification module 150. The second switching unit 170 transmits the second power signal to the power amplification module 150 without boosting.
The first switch unit 180 may include a single-pole double-throw switch and an adaptive switch, a common terminal of the single-pole double-throw switch is connected to an input terminal of the adaptive switch, and throw terminals are respectively connected to the first power signal and the second power signal. The output end of the adaptive switch is connected to the third voltage boosting unit 143, and the single-pole double-throw switch and the adaptive switch can transmit the first power signal or the second power signal to the third voltage boosting unit 143 according to the control signal.
At this time, the amplified power supply signal may include four kinds of signals, a first power supply signal boosted by the third boosting unit 143, a second power supply signal, and a 0 voltage signal boosted by the third boosting unit 143. The control signal may also include four control signals, where the first control signal controls the first switch unit 180 to transmit the first power signal to the third voltage boosting unit 143, and controls the third voltage boosting unit 143 to operate; the second control signal controls the first switch unit 180 to transmit the second power signal to the third voltage boosting unit 143, and controls the third voltage boosting unit 143 to operate; the third control signal controls the second switching unit 170 to be turned on; the fourth control signal turns off the first switching unit 180, the third boosting unit 143, and the second switch.
For example, the input signal is an audio signal, as shown in fig. 11, the highest volume level is 16 levels, and the lowest volume level is 0 level (mute), and through a debugging experiment, a 0-16 volume curve (voltage mapping relationship) is divided into 4 segments, which are respectively 16 levels to X levels (X ≦ 16), X levels to Y levels (Y ≦ X), Y levels to 1 levels (Y ≧ 1), and 0 level (mute).
When detecting that the audio signal is at 16-X level, the control module 120 outputs a first control signal, the first control signal controls the first switch unit 180 to transmit the first power signal to the third voltage boosting unit 143, the third voltage boosting unit 143 boosts the first power signal, and the second switch unit 170 is turned off.
When detecting that the audio signal is at X-Y level, the control module 120 outputs a second control signal, the second control signal controls the first switch unit 180 to transmit the second power signal to the third voltage boosting unit 143, the third voltage boosting unit 143 boosts the second power signal, and the second switch unit 170 is turned off.
When detecting that the audio signal is at level Y to level 1, the control module 120 outputs a third control signal, the third control signal controls the second switching unit 170 to be turned on, the second power signal is transmitted to the power amplification module 150, and the second switching unit 170 is turned off.
When detecting that the audio signal is at level 0, the control module 120 outputs a fourth control signal, and the fourth control signal controls the third voltage boosting unit 143, the first switching unit 180, and the second switching unit 170 to turn on and off.
The first boosting unit 141 provided by the embodiment of the present disclosure may include a chopper boosting circuit (boost) or a charge pump boosting circuit; the second boosting unit 142 may include a chopper boosting circuit (boost) or a charge pump boosting circuit, etc.; the third boosting unit 143 may include a chopper boosting circuit (boost) or a charge pump boosting circuit, etc.
It should be noted that, in the embodiment of the present disclosure, two power signals and two voltage boosting units are taken as an example for description, in practical applications, the number of the power signals and the number of the voltage boosting units may be other, and the embodiment of the present disclosure is not limited to this.
The power amplifying module 150 may be a class D power amplifier, and certainly, in practical applications, the power amplifier may also be other power amplifiers, for example, a class a power amplifier or a class B power amplifier, and the embodiment of the present disclosure takes the class D power amplifier as an example for description.
The power amplification module 150 includes: PWM converting circuit, voltage converter and power output circuit. The PWM conversion circuit comprises an integrator and a comparator, wherein the integrator integrates the received audio input signal under the power supply voltage; the comparator is connected to the integrator and the reference wave generating circuit, and is used for comparing the output signal of the integrator with the triangular wave generated by the oscillating module 160 under the power supply voltage to generate the PWM signal.
In the present embodiment, the integrator includes a peripheral circuit composed of an input resistor and a capacitor. The structure and operation of the integrator are similar to those of the prior art, and therefore, the description thereof is omitted. In addition, the audio input signal received by the integrator is a differential signal.
And a voltage converter connected to the comparator and the boost module 140 for converting the received PWM signal from the power supply voltage domain to the high voltage domain at the high voltage provided by the boost module 140. In other words, the boost module 140 is configured to amplify the amplitude of the received PWM signal, or the boost module 140 is configured to increase the voltage value corresponding to the received PWM signal.
For example, assume that the voltage value corresponding to logic level "1" of the PWM signal generated by the comparator is 3V; then the voltage value corresponding to the logic level "1" of the PWM signal becomes 6V after passing through the voltage converter. In this way, the boost module 140 achieves the amplification effect on the amplitude of the PWM signal without changing the frequency of the received PWM signal.
And the power output circuit is connected with the voltage converter and the boosting module 140 and is used for processing the amplified PWM signal under the amplified power supply signal provided by boosting so as to output an audio output signal.
In the embodiment of the present disclosure, the oscillation module 160 may output a square wave to the voltage boosting module 140 and output a triangular wave to the power amplification module 150, and the frequencies of the square wave and the triangular wave may be synchronized. The oscillation module 160 outputs the square wave and the triangular wave synchronously, so that the clock synchronism of the boosting module 140 and the power module can be ensured.
According to the amplifying circuit provided by the embodiment of the disclosure, the control module 120 outputs a control signal according to an input signal, the boosting module 140 responds to the control signal to amplify the first power signal or amplify the first power signal, and power is amplified and supplied to the power through the amplified power signal, so that the voltage of the power signal input by the boosting module 140 is determined according to the input signal, the problem that the voltage of the power signal cannot be adjusted according to the input signal is solved, the conversion efficiency of the boosting module 140 can be improved, and the power consumption of electronic equipment is reduced.
It should be noted that although in the above detailed description several modules or units of the amplifying circuit are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Accordingly, various aspects of the present invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
The exemplary embodiment of the present disclosure also provides a control method of an amplifying circuit, as shown in fig. 12, the control method may include the steps of:
step S121, determining a control signal according to the input signal;
step S122, controlling a boosting module to boost a power supply signal by using the control signal so as to obtain an amplified power supply signal;
and step S123, controlling the power amplification module to amplify and output the input signal by using the amplified power supply signal.
According to the control method of the amplifying circuit, the control signal is output according to the input signal, the first power supply signal is amplified or responded to the control signal, power is amplified and supplied to the power through the amplified power supply signal, the voltage of the input power supply signal of the boosting module is determined according to the input signal, the problem that the voltage of the power supply signal cannot be adjusted according to the input signal is solved, therefore, the conversion efficiency of the boosting module can be improved, and the power consumption of electronic equipment is reduced.
In step S121, a control signal may be determined according to the input signal.
The input signal may be an audio signal or a radio frequency signal or other signals that need to be power amplified. The control signal may be determined by the control module from the input signal. The control module may store a voltage mapping relationship, and the control module outputs a control signal according to the input signal and the voltage mapping relationship, where the voltage mapping relationship includes a mapping relationship between the input signal and the amplified power signal. The voltage mapping relationship may be in the form of a function, a table, a curve, or the like.
On this basis, step S121 can be implemented as follows: and determining the output signal according to the mapping relation between the input signal and the voltage, wherein the voltage mapping relation comprises the mapping relation between the input signal and the amplified power supply signal.
For example, the input signal is an audio signal, the volume level is 16 levels at the highest level and 0 level at the lowest level (mute), and a volume curve (voltage mapping relationship) from 0 to 16 can be divided into 4 segments through debugging experiments, which are respectively the first end: 16-X (X is less than or equal to 16), and the second stage: X-Y (Y is less than or equal to X), and the third stage: grade Y-1 (Y is more than or equal to 1) and the fourth section: level 0 (mute).
The voltage mapping relationship comprises: a first section-a first amplified power supply signal (first power supply signal amplified by the first booster unit), a second section-a second amplified power supply signal (second power supply signal amplified by the second booster unit), a third section-a third amplified power supply signal (second power supply signal), and a fourth section-a fourth amplified power supply signal (0V).
Alternatively, the voltage mapping relationship includes: a first section-a first amplified power supply signal (first power supply signal amplified by the third booster unit), a second section-a second amplified power supply signal (second power supply signal amplified by the third booster unit), a third section-a third amplified power supply signal (second power supply signal), and a fourth section-a fourth amplified power supply signal (0V).
The control signals may include a first control signal, a second control signal, a third control signal, and a fourth control signal, the first segment corresponding to the first control signal, the second segment corresponding to the second control signal, the third segment corresponding to the third control signal, and the fourth segment corresponding to the fourth control signal.
In step S122, the control signal may be utilized to control the boost module to boost the power signal to obtain the amplified power signal.
The boost module determines a boost mode according to the control signal, and boosts the power signal in the corresponding boost mode.
In a possible embodiment of the present disclosure, the boost module includes: the first boosting unit is respectively connected with the control unit and the power amplification module and used for responding to the output control signal to boost the first power supply signal and transmitting the first power supply signal to the power amplification module; the second boosting unit is respectively connected with the control unit and the power amplification module, and is used for responding to the output control signal to boost the second power supply signal and transmitting the second power supply signal to the power amplification module.
On this basis, the amplifying circuit may further include a second switching unit, the second switching unit is respectively connected to the control unit and the power amplifying module, and the second switching unit is configured to transmit the second power signal to the power amplifying module in response to the control signal.
The first boosting unit boosts the first power supply signal and transmits the first power supply signal to the power amplification module, and the second boosting unit boosts the second power supply signal and transmits the second power supply signal to the power amplification module. The second switching unit is used for transmitting the second power supply to the power amplification module without boosting. At this time, the amplified power signal may include four kinds of signals, a first power signal boosted by the first boosting unit, a second power signal boosted by the second boosting unit, a second power signal, and a 0 voltage signal. The control signal may also include four control signals, a first control signal controls the first voltage boosting unit to operate, a second control signal controls the second voltage boosting unit to operate, a third control signal controls the second switch unit to turn on, and a fourth control signal turns off the first voltage boosting unit, the second voltage boosting unit, and the second switch.
It should be noted that the second switch unit may be disposed inside or outside the amplifying circuit package chip, and this is not specifically limited in this disclosure.
In an example, the input signal is an audio signal, the volume level is 16 levels at the highest, and 0 level (mute) at the lowest, and a 0-16 volume curve (voltage mapping relationship) can be divided into 4 sections by debugging experiments, namely 16 levels to X levels (X is less than or equal to 16), X levels to Y levels (Y is less than or equal to X), Y levels to 1 levels (Y is greater than or equal to 1), and 0 level (mute).
When the control module detects that the audio signal is in 16-level to X-level, a first control signal is output, the first control signal controls the first boosting unit to boost the first power supply signal, and the second boosting unit and the second switch unit are turned off.
When the control module detects that the audio signal is at X-Y level, a second control signal is output, the second control signal controls the second boosting unit to boost a second power supply signal, and the first boosting unit and the second switching unit are turned off.
When the control module detects that the audio signal is at the level Y-1, a third control signal is output, the third control signal controls the second switch unit to be switched on, the second power supply signal is transmitted to the power amplification module, and the first boosting unit and the second boosting unit are switched off.
When the control module detects that the audio signal is at the 0 level, a fourth control signal is output, and the fourth control signal controls the first boosting unit, the second boosting unit and the second switch unit to be switched on and off.
In another possible embodiment of the present disclosure, the amplifying circuit further includes: the first switch unit is connected with the first power supply signal and the second power supply signal. The second switch unit is respectively connected with the control unit and the power amplification module, and the second switch unit is used for responding to the control signal and transmitting the second power supply signal to the power amplification module.
The boosting module comprises a third boosting unit, the third boosting unit is respectively connected with the first switch unit, the control unit and the power amplification unit, and the first switch unit responds to the control signal to transmit the first power supply signal or the second power supply signal to the third boosting unit.
The first switch unit transmits the first power supply signal or the second power supply signal to the third boosting unit, and the first power supply signal or the second power supply signal is transmitted to the power amplification module after being boosted by the third boosting unit. The second switch unit transmits the second power supply signal to the power amplification module without boosting.
At this time, the amplified power signal may include four kinds of signals, a first power signal boosted by the third boosting unit, a second power signal, and a 0 voltage signal. The control signal may also include four control signals, and the first control signal controls the first switch unit to transmit the first power signal to the third voltage boosting unit and controls the third voltage boosting unit to operate; the second control signal controls the first switch unit to transmit the second power supply signal to the third boosting unit and controls the third boosting unit to work; the third control signal controls the second switch unit to be conducted; the fourth control signal turns off the first switching unit, the third boosting unit and the second switch.
In an example, the input signal is an audio signal, the volume level is 16 levels at the highest, and 0 level (mute) at the lowest, and a 0-16 volume curve (voltage mapping relationship) can be divided into 4 sections by debugging experiments, namely 16 levels to X levels (X is less than or equal to 16), X levels to Y levels (Y is less than or equal to X), Y levels to 1 levels (Y is greater than or equal to 1), and 0 level (mute).
When the control module detects that the audio signal is at 16-level to X-level, a first control signal is output, the first control signal controls the first switch unit to transmit the first power supply signal to the third boosting unit, the third boosting unit boosts the first power supply signal, and the second switch unit is turned off.
When the control module detects that the audio signal is in X-Y level, a second control signal is output, the second control signal controls the first switch unit to transmit the second power supply signal to the third boosting unit, the third boosting unit boosts the second power supply signal, and the second switch unit is turned off.
When the control module detects that the audio signal is at the Y level to the 1 level, a third control signal is output, the third control signal controls the second switch unit to be switched on, the second power supply signal is transmitted to the power amplification module, and the second switch unit is switched off.
When the control module detects that the audio signal is at the 0 level, a fourth control signal is output, and the fourth control signal controls the third boosting unit, the first switch unit and the second switch unit to be switched on and off.
In step S1230, the power amplification module is controlled to amplify and output the input signal by using the amplified power signal.
Wherein, the power amplifying module may be a class D power amplifier. The power amplification module includes: PWM converting circuit, voltage converter and power output circuit. The PWM conversion circuit comprises an integrator and a comparator, wherein the integrator integrates the received audio input signal under the power supply voltage; the comparator is connected with the integrator and the reference wave generating circuit and used for comparing an output signal of the integrator with a triangular wave generated by the oscillating module under the power supply voltage to generate a PWM signal.
In this embodiment, the integrator includes a peripheral circuit composed of an input resistor and a capacitor. The structure and operation principle of the integrator are similar to those of the prior art, and therefore, the details are not repeated herein. In addition, the audio input signal received by the integrator is a differential signal.
And the voltage converter is connected with the comparator and the boosting module and is used for converting the received PWM signal from a power supply voltage domain into a high voltage domain under the high voltage provided by the boosting module. In other words, the boost module is configured to amplify an amplitude of the received PWM signal, or the boost module is configured to increase a voltage value corresponding to the received PWM signal.
For example, it is assumed that the voltage value corresponding to the logic level "1" of the PWM signal generated by the comparator is 3V; the voltage value corresponding to the logic level "1" of the PWM signal becomes 6V after passing through the voltage converter. Therefore, the boost module realizes the amplification effect on the amplitude of the PWM signal on the basis of not changing the frequency of the received PWM signal.
And the power output circuit is connected with the voltage converter and the boosting module and is used for processing the amplified PWM signal under the amplified power supply signal provided by the boosting module so as to output an audio output signal.
According to the control method of the amplifying circuit, the control signal is output according to the input signal, the first power supply signal is amplified or responded to the control signal, power is amplified and supplied to the power through the amplified power supply signal, the voltage of the input power supply signal of the boosting module is determined according to the input signal, the problem that the voltage of the power supply signal cannot be adjusted according to the input signal is solved, therefore, the conversion efficiency of the boosting module can be improved, and the power consumption of electronic equipment is reduced.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The exemplary embodiment of the present disclosure also provides an electronic device, as shown in fig. 13, which includes the above-described amplifying circuit 100.
The amplifying circuit 100 comprises an input module 110, a control module 120, a power supply module 130, a boosting module 140 and a power amplifying module 150, wherein the input module 110 is used for receiving an input signal; the control module 120 is connected to the input module 110, and the control module 120 is configured to output a control signal according to the input signal; the power module 130 is configured to output a plurality of power signals, where the voltages of the plurality of power signals are different; the boosting module 140 is connected to the control module 120 and the power module 130, and the boosting unit is configured to selectively boost one of the plurality of power signals in response to the control signal to obtain an amplified power signal; the power amplification module 150 is respectively connected to the input module 110 and the boost module 140, and the power amplification module 150 amplifies the input signal in response to the amplified power signal.
Further, the electronic device provided by the embodiment of the present disclosure may further include a battery 40, where the battery 40 is connected to the power module 130, and the battery 40 is configured to provide a plurality of power signals with different voltages to the voltage boosting module 140. For example, the voltage of the first power signal is greater than the voltage of the second power signal.
When the input signal is an audio signal, the electronic device may further include a speaker, and the speaker is connected to the output end of the power amplification module.
The electronic device provided by the embodiment of the disclosure can be an electronic device with a camera shooting component, such as a mobile phone, a tablet computer, a wearable device, a camera or a video camera. The following description takes an electronic device as a mobile phone as an example:
the electronic device may further include a display screen 10, a middle frame 20, a main board 30, and the like, where the display screen 10, the middle frame 20, and the rear cover 50 form an accommodating space for accommodating other electronic components or functional modules of the electronic device. Meanwhile, the display screen 10 forms a display surface of the electronic device for displaying information such as images, texts, and the like. The Display screen 10 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.
A glass cover plate may be provided on the display screen 10. Wherein, the glass cover plate can cover the display screen 10 to protect the display screen 10 and prevent the display screen 10 from being scratched or damaged by water.
The display screen 10 may include a display area as well as a non-display area. Wherein the display area performs the display function of the display screen 10 for displaying information such as images, text, etc. The non-display area does not display information. The non-display area can be used for arranging functional modules such as a camera, a receiver, a proximity sensor and the like. In some embodiments, the non-display area may include at least one area located at an upper portion and a lower portion of the display area.
The display screen 10 may be a full-face screen. At this time, the display screen 10 may display information in a full screen, so that the electronic apparatus has a large screen occupation ratio. The display screen 10 includes only display regions and does not include non-display regions.
The middle frame 20 may be a hollow frame structure. The material of the middle frame 20 may include metal or plastic. The main board 30 is mounted inside the receiving space. For example, the main board 30 may be mounted on the middle frame 20 and be received in the receiving space together with the middle frame 20. The main board 30 is provided with a grounding point to realize grounding of the main board 30.
One or more of the functional modules such as a motor, a microphone, a receiver, an earphone interface, a universal serial bus interface (USB interface), a proximity sensor, an ambient light sensor, a gyroscope, a storage unit, and a processing unit may be integrated on the main board 30. Meanwhile, the display screen 10 may be electrically connected to the main board 30.
Wherein the storage unit stores program code executable by the processing unit to cause the processing unit to perform steps according to various exemplary embodiments of the present invention as described in the above section "exemplary methods" of the present specification.
The main board 30 is also provided with a display control circuit. The display control circuit outputs an electric signal to the display screen 10 to control the display screen 10 to display information. The light-emitting control unit and the color-changing control unit can be arranged on the mainboard.
The battery 40 is mounted inside the receiving space. For example, the battery 40 may be mounted on the middle frame 20 and be received in the receiving space together with the middle frame 20. The battery 40 may be electrically connected to the motherboard 30 to enable the battery 40 to power the electronic device. The main board 30 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic components in the electronic device.
The rear cover 50 serves to form an outer contour of the electronic apparatus. The rear cover 50 may be integrally formed. In the forming process of the rear cover 50, a rear camera hole, a fingerprint identification module mounting hole and the like can be formed in the rear cover 50. The camera assembly 10 may be provided on a main board and a center frame, and the camera assembly 10 receives light from the rear camera hole. Of course, in practical applications, the camera head assembly 10 may also be a front camera head, and the embodiment of the present disclosure is not limited thereto.
In an exemplary embodiment of the present disclosure, there is also provided a computer readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above-mentioned "exemplary methods" section of the present description, when said program product is run on the terminal device.
Referring to fig. 14, a program product 1400 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this respect, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.

Claims (13)

1. An amplification circuit, comprising:
an input module for receiving an input signal;
the control module is connected with the input module and used for outputting a control signal according to the input signal;
the power supply module is used for outputting a plurality of power supply signals, and the voltages of the power supply signals are different;
the boosting module is used for responding to the control signal and selectively boosting one power supply signal in a plurality of power supply signals so as to obtain an amplified power supply signal;
the power amplification module is respectively connected with the input module and the boosting module and responds to the amplified power supply signal to amplify the input signal;
the power supply module comprises n electric cores which are connected in series, the power supply module at least outputs power signals of voltage nVbat and voltage Vbat, and the voltage Vbat is the voltage of a single electric core.
2. The amplifier circuit of claim 1, wherein the control module includes a voltage map, the control module outputting the control signal based on the input signal and the voltage map, the voltage map including a map of the input signal and the amplified power signal.
3. The amplification circuit of claim 2, wherein the control module comprises:
a storage unit for storing the voltage mapping relationship;
and the control unit is respectively connected with the storage unit and the boosting module, receives the input signal and outputs a control signal according to a voltage mapping relation in the storage unit.
4. The amplification circuit of claim 1, wherein the plurality of power supply signals includes a first power supply signal and a second power supply signal, the boost module comprising:
the first boosting unit is respectively connected with the control module and the power amplification module and used for responding to the output control signal to boost the first power supply signal and transmitting the first power supply signal to the power amplification module;
and the second boosting unit is respectively connected with the control module and the power amplification module and used for responding to the output control signal to boost the second power supply signal and transmitting the second power supply signal to the power amplification module.
5. The amplification circuit of claim 1, wherein the plurality of power supply signals includes a first power supply signal and a second power supply signal, the amplification circuit further comprising:
a first switching unit that connects the first power signal and the second power signal;
the boosting module includes:
and the third boosting unit is respectively connected with the first switch unit, the control module and the power amplification unit, and the first switch unit responds to the control signal to transmit the first power supply signal or the second power supply signal to the third boosting unit.
6. The amplification circuit of claim 4 or 5, further comprising:
the second switch unit is respectively connected with the control module and the power amplification module, and the second switch unit is used for responding to the control signal and transmitting the second power supply signal to the power amplification module.
7. The amplification circuit of claim 1, further comprising:
the oscillation module is respectively connected with the boosting module and the power amplification module and is used for providing oscillation signals for the power amplification module.
8. The amplification circuit of claim 1, wherein the input signal comprises an audio signal.
9. A control method for an amplification circuit according to any one of claims 1 to 8, the control method comprising:
determining a control signal according to the input signal;
controlling a boosting module to boost one power supply signal in a plurality of power supply signals by using the control signal so as to obtain an amplified power supply signal;
and controlling the power amplification module to amplify and output the input signal by using the amplified power supply signal.
10. The method of controlling an amplifier circuit of claim 9, wherein said determining a control signal based on an input signal comprises:
and determining an output signal according to the mapping relation between the input signal and the voltage, wherein the voltage mapping relation comprises the mapping relation between the input signal and the amplified power supply signal.
11. An electronic device, characterized in that the electronic device comprises: an amplifying circuit according to any one of claims 1-8.
12. The electronic device of claim 11, wherein the electronic device further comprises:
the battery is connected with the power supply module and used for providing a plurality of power supply signals with different voltages for the boosting module.
13. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to claim 9 or 10.
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