Single power amplifier driven signal control system and method

Abstract

The application provides a single-power-amplifier-driven signal control system for driving a two-in-one device integrated with a first device for generating sound and a second device for generating vibration, the two-in-one device comprising a first input end and a second input end, the signal control system comprising: a signal control module for judging a required working mode according to a received input signal and generating an output signal for driving the two-in-one device according to the input signal and the working mode; a power amplifier for signal amplifying the output signal to obtain an amplified driving signal; and a pre-circuit module for loading the amplified driving signal to the first input end and / or the second input end to drive the first device and / or the second device to work. Compared with the related art, the signal control module can simplify the driving circuit, save the cost of manufacturing the terminal device, and improve the space utilization in the terminal device.

Description

[Technical Field]

[0001] This invention relates to a signal control module, and more particularly to a signal control system and method driven by a single power amplifier. [Background Technology]

[0002] Today's mobile devices need to perform more and more functions, and the number of components required in these devices is constantly increasing. Given the limited overall space, how to reduce the size of components and improve space utilization has become a direction for component suppliers to continuously improve.

[0003] The related technology proposes a two-in-one device that integrates a speaker and a motor. This device greatly reduces the size of the terminal device, and the speaker and motor can be used by connecting to power amplifiers separately in the traditional way.

[0004] However, in the two-in-one devices of related technologies, although different devices are integrated, the connection methods are not differentiated according to the integrated devices, which means that the control system in the terminal device is not simplified and the overall control method needs to be optimized.

[0005] Therefore, it is necessary to provide a new signal control module to solve the above problems. [Summary of the Invention]

[0006] The technical problem to be solved by the present invention is to provide a system and method for independent signal control of a two-in-one device.

[0007] To address the aforementioned technical problems, in a first aspect, the present invention provides a signal control system driven by a single power amplifier, used to drive a two-in-one device integrating a first device for generating sound and a second device for generating vibration, the two-in-one device including a first input terminal for introducing signals to the first device and a second input terminal for introducing signals to the second device; characterized in that,

[0008] The signal control system includes:

[0009] A signal control module is provided, which is used to determine the required working mode for the current state based on the received input signal, and to generate an output signal for driving the two-in-one device based on the input signal and the working mode; wherein, the input signal includes vibration signal and / or audio signal, and the working mode includes the first device working alone, the second device working alone, and the first device and the second device working simultaneously;

[0010] A power amplifier, wherein there is one power amplifier, is used to amplify the output signal to obtain an amplified drive signal;

[0011] A preamplifier circuit module is used to load the amplified drive signal to the first input terminal and / or the second input terminal to drive the first device and / or the second device to work.

[0012] Preferably, the signal control module includes:

[0013] The function discrimination submodule is used to determine the required working mode for the current state based on the received input signal, and to generate a collaborative working judgment result of the two-in-one device based on the input signal and the working mode.

[0014] The signal generation submodule is used to generate the output signal based on the input signal and the cooperative work judgment result.

[0015] Preferably, the signal control module further includes a post-processing submodule, which is used to optimize the output signal according to a preset post-processing method before outputting it when the output signal is an audio signal.

[0016] Preferably, the signal control module further includes a device protection submodule, which is used to perform real-time power control processing on the output signal and output it according to the parameter model of the two-in-one device, so as to avoid the power of the output signal exceeding the maximum operating power of the two-in-one device.

[0017] Preferably, the signal control module further includes a nonlinear compensation submodule, used to perform nonlinear harmonic compensation on the output signal and output it according to the parameter model of the two-in-one device.

[0018] Preferably, the preamplifier circuit module includes a high-pass filter unit and a low-pass filter unit. The high-frequency signal of the amplified drive signal after being filtered by the high-pass filter unit is loaded onto the first device, and the low-frequency signal of the amplified drive signal after being filtered by the low-pass filter unit is loaded onto the second device.

[0019] Preferably, the first device is a loudspeaker and the second device is a vibration motor.

[0020] Preferably, the preamplifier circuit module includes a signal source and a capacitor for receiving the amplified drive signal. The positive terminal of the signal source is connected to the first terminal of the capacitor, the negative terminal of the signal source is connected to the second terminal of the capacitor, and the negative terminal of the signal source is grounded. The first device is connected in series between the second terminal of the capacitor and the negative terminal of the signal source, so that the capacitor acts as the high-pass filter unit and loads the high-frequency signal passing through the capacitor onto the first device. The capacitor is connected in parallel with the second device to act as the low-pass filter unit and loads the low-frequency signal blocked by the capacitor onto the second device.

[0021] Secondly, the present invention also provides a signal control method for a dual-in-one device driven by a single power amplifier, the dual-in-one device comprising at least a speaker having a first input terminal and a vibration motor having a second input terminal, the signal control method comprising the following steps:

[0022] Receive audio signals and / or vibration signals, and generate an output signal for driving the two-in-one device;

[0023] The output signal is amplified to obtain an amplified drive signal;

[0024] The amplified drive signal is applied to the speaker and / or the vibration motor through an analog circuit to drive the two-in-one device;

[0025] The signal control method for the dual-function device used for driving a single power amplifier is implemented by the signal control system for driving a single power amplifier as described in any one of the above-mentioned methods.

[0026] Preferably, the step of applying the amplified drive signal to the speaker and / or the vibration motor via an analog circuit specifically includes:

[0027] The amplified drive signal is filtered, and high-frequency signals above a preset filtering frequency in the amplified drive signal are applied to the speaker; and / or,

[0028] The low-frequency signal below the preset filtering frequency in the amplified drive signal is loaded into the vibration motor.

[0029] Compared with related technologies, the signal control system for a single power amplifier driven by this invention, for a two-in-one device with two different functional components, firstly, an audio signal and / or vibration signal is received by a signal control module, and an output signal for driving the two-in-one device is generated. Then, the output signal is amplified by a signal amplification module to obtain an amplified drive signal. Finally, a preamplifier module is used to connect the first and second input terminals of the two-in-one device, and the amplified drive signal is loaded onto the different components in the two-in-one device through the analog circuit. The signal amplification module is a single power amplifier unit. Through specific signal control methods and circuit design, this invention enables the two-in-one device to drive the components separately according to the input signals, achieving the effect of using the two components independently. This simplifies the drive circuit, saves manufacturing costs for terminal devices, and improves space utilization within the terminal device. [Attached Image Description]

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0031] Figure 1 This is a schematic diagram of the signal control system driven by a single power amplifier provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the signal control module 101 in the single power amplifier driven signal control system provided in this embodiment of the invention;

[0033] Figure 3 This is a schematic diagram of the effect of the front-end circuit module 103 provided in an embodiment of the present invention;

[0034] Figure 4 This is a flowchart illustrating the steps of a signal control method for a single-amplifier driven dual-function device provided in an embodiment of the present invention. 【Detailed Implementation Methods】

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a signal control system driven by a single power amplifier provided in an embodiment of the present invention. The signal control system 100 is used to drive a two-in-one device that integrates a first device for generating sound and a second device for generating vibration. The two-in-one device includes a first input terminal for introducing signals to the first device and a second input terminal for introducing signals to the second device. The signal control module 100 includes:

[0037] The signal control module 101 is used to determine the required working mode of the current state based on the received input signal, and to generate an output signal for driving the two-in-one device based on the input signal and the working mode; wherein, the input signal includes vibration signal and / or audio signal, and the working mode includes the first device working alone, the second device working alone, and the first device and the second device working simultaneously;

[0038] A power amplifier 102, wherein there is one power amplifier 102, is used to amplify the output signal to obtain an amplified drive signal;

[0039] The preamplifier circuit module 103 is used to load the amplified drive signal to the first input terminal and / or the second input terminal to drive the first device and / or the second device to work.

[0040] In this embodiment of the invention, the signal control module 101 specifically consists of hardware capable of generating the output signal of the two-in-one device, and algorithm software for controlling the output signal. Please refer to... Figure 2 , Figure 2 This is a schematic diagram of the structure of the signal control module 101 in the single-power amplifier driven signal control system provided in an embodiment of the present invention. Preferably, the signal control module 101 includes:

[0041] The function discrimination submodule 1011 is used to determine the working mode required for the current state based on the received input signal, and to generate the collaborative working judgment result of the two-in-one device based on the input signal and the working mode.

[0042] The signal generation submodule 1012 is used to generate the output signal based on the input signal and the cooperative work judgment result.

[0043] For example, when the signal control module 101 is implemented, its carrier can be the CPU (Central Processing Unit) or DSP (Digital Signal Processing) of the terminal device, or it can be a hardware device capable of running algorithms, such as a peripheral codec or a DSP on a power amplifier chip. When implemented based on a CPU, each submodule can be constructed based on existing software algorithms. Specifically, regarding the process of the function discrimination submodule 1011 determining the required operating mode for the current state, when the input signal contains multiple signals—namely, signals used to control the first device and the second device—the signal representations differ due to the different driving objects. In possible embodiments, the function discrimination submodule 1011 can determine the operating mode by the signal representation, or by determining the operating mode based on the source of the input signal.

[0044] Preferably, the signal control module 101 further includes a post-processing submodule 1013, which is used to optimize the output signal according to a preset post-processing method before outputting it when the output signal is an audio signal.

[0045] Preferably, the signal control module 101 further includes a device protection submodule 1014, which is used to perform real-time power control processing on the output signal and output it according to the parameter model of the two-in-one device, so as to avoid the power of the output signal exceeding the maximum operating power of the two-in-one device.

[0046] Preferably, the signal control module 101 further includes a nonlinear compensation submodule 1015, which is used to perform nonlinear harmonic compensation on the output signal and output it according to the parameter model of the two-in-one device.

[0047] In the aforementioned device protection submodule 1014 and nonlinear compensation submodule 1015, the parameter model of the two-in-one device can be a parameter set pre-constructed for the two-in-one device. Through a certain signal processing algorithm, the output signal can be frequency controlled and nonlinear harmonics compensated in the submodule, thereby protecting the two-in-one device from damage due to high-frequency signals, reducing signal distortion, and improving acoustic or vibration effects.

[0048] In this embodiment of the invention, the power amplifier 102 can be implemented based on a dedicated chip for signal amplification. Its function can be a conventional linear power amplifier or a smart power amplifier with voltage and current feedback signals. During implementation, the parameters of each submodule in the signal control module 101 need to be adjusted according to the chip used in the power amplifier 102. It should also be noted that the connection order of the submodules in the signal control module 101 in this embodiment of the invention does not necessarily need to follow the specified order. Figure 2 The process proceeds in sequence. In actual implementation, each sub-module can be connected according to the characteristics of the signal and the acoustic and vibration effects of the output, based on the processing method of the output signal.

[0049] Preferably, the preamplifier circuit module 103 includes a high-pass filter unit and a low-pass filter unit. The high-frequency signal of the amplified drive signal after being filtered by the high-pass filter unit is loaded onto the first device, and the low-frequency signal of the amplified drive signal after being filtered by the low-pass filter unit is loaded onto the second device.

[0050] Preferably, the first device is a loudspeaker and the second device is a vibration motor.

[0051] Preferably, the preamplifier circuit module includes a signal source and a capacitor for receiving the amplified drive signal. The positive terminal of the signal source is connected to the first terminal of the capacitor, the negative terminal of the signal source is connected to the second terminal of the capacitor, and the negative terminal of the signal source is grounded. The first device is connected in series between the second terminal of the capacitor and the negative terminal of the signal source, so that the capacitor acts as the high-pass filter unit and loads the high-frequency signal passing through the capacitor onto the first device. The capacitor is connected in parallel with the second device to act as the low-pass filter unit and loads the low-frequency signal blocked by the capacitor onto the second device.

[0052] For example, please refer to Figure 3 , Figure 3 This is a schematic diagram of the effect of the pre-amplifier circuit module 103 provided in an embodiment of the present invention. When the speaker is a loudspeaker and the vibration motor is a motor, since the operating frequency band of the motor is generally below 200Hz, while the operating frequency band of the loudspeaker is generally above 200Hz, according to... Figure 3 The preamplifier circuit shown has a preset filter frequency of 200Hz. As a result, the high-frequency (above 200Hz) part of the amplified drive signal is applied to both ends of the speaker, and the low-frequency (below 200Hz) part is applied to both ends of the motor, thereby ensuring that the two devices can work independently or simultaneously.

[0053] It should be noted that, Figure 3 The connection and effect of the preamplifier module 103 shown are only a preferred embodiment. For a two-in-one device consisting of a motor and a speaker, the specific connection method can be as follows: Figure 3 The series connection shown can also be a parallel connection with other components. Different connection methods require different power amplifiers and preamplifier circuits, which can be changed according to actual needs. Furthermore, the single-power amplifier driven signal control system provided in this embodiment limits the function of the preamplifier circuit in the design of the preamplifier circuit module 103. This allows the signal control module of this embodiment to be used beyond a two-in-one device. Using two separate motors and speakers connected to the preamplifier circuit module 103 can also achieve the same technical effects described in the above embodiment.

[0054] Compared with related technologies, the signal control system for a single power amplifier driven by this invention, for a two-in-one device with two different functional components, firstly, an audio signal and / or vibration signal is received by a signal control module, and an output signal for driving the two-in-one device is generated. Then, the output signal is amplified by a signal amplification module to obtain an amplified drive signal. Finally, a preamplifier module is used to connect the first and second input terminals of the two-in-one device, and the amplified drive signal is loaded onto the different components in the two-in-one device through the analog circuit. The signal amplification module is a single power amplifier unit. Through specific signal control methods and circuit design, this invention enables the two-in-one device to drive the components separately according to the input signals, achieving the effect of using the two components independently. This simplifies the drive circuit, saves manufacturing costs for terminal devices, and improves space utilization within the terminal device.

[0055] This invention also provides a signal control method for a two-in-one device driven by a single power amplifier. Please refer to [link / reference]. Figure 4 , Figure 4 This is a flowchart illustrating the steps of a signal control method for a single-amplifier driven dual-in-one device provided in an embodiment of the present invention. The dual-in-one device includes at least a speaker with a first input terminal and a vibration motor with a second input terminal. The signal control method includes the following steps:

[0056] S1. Receive audio signals and / or vibration signals, and generate an output signal for driving the two-in-one device;

[0057] S2. Amplify the output signal to obtain an amplified drive signal;

[0058] S3. The amplified drive signal is applied to the speaker and / or the vibration motor through an analog circuit to drive the two-in-one device;

[0059] The signal control method for the dual-function device driven by a single power amplifier is implemented based on the signal control system for driving a single power amplifier as described above.

[0060] Preferably, the step of applying the amplified drive signal to the speaker and / or the vibration motor via an analog circuit specifically includes:

[0061] The amplified drive signal is filtered, and high-frequency signals above a preset filtering frequency in the amplified drive signal are applied to the speaker; and / or,

[0062] The low-frequency signal below the preset filtering frequency in the amplified drive signal is loaded into the vibration motor.

[0063] When the signal control method for the two-in-one device driven by a single power amplifier is executed, it can achieve the same technical effect as the signal control system for driving a single power amplifier as described above. To avoid repetition, it will not be described again here.

[0064] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A signal control system driven by a single power amplifier, used to drive a two-in-one device integrating a first device for generating sound and a second device for generating vibration, the two-in-one device comprising a first input terminal for introducing a signal to the first device and a second input terminal for introducing a signal to the second device; characterized in that, The signal control system includes: A signal control module is provided, which is used to determine the required working mode for the current state based on the received input signal, and to generate an output signal for driving the two-in-one device based on the input signal and the working mode; wherein, the input signal includes vibration signal and / or audio signal, and the working mode includes the first device working alone, the second device working alone, and the first device and the second device working simultaneously; The signal control module includes: The function discrimination submodule is used to determine the required working mode for the current state based on the received input signal, and to generate a collaborative working judgment result of the two-in-one device based on the input signal and the working mode. A signal generation submodule is used to generate the output signal based on the input signal and the cooperative work judgment result; A power amplifier, wherein there is one power amplifier, is used to amplify the output signal to obtain an amplified drive signal; A preamplifier circuit module is used to load the amplified drive signal to the first input terminal and / or the second input terminal to drive the first device and / or the second device to work; the preamplifier circuit module includes a high-pass filter unit and a low-pass filter unit, wherein the high-frequency signal of the amplified drive signal after being filtered by the high-pass filter unit is loaded onto the first device, and the low-frequency signal of the amplified drive signal after being filtered by the low-pass filter unit is loaded onto the second device.

2. The signal control system driven by a single power amplifier according to claim 1, characterized in that, The signal control module also includes a post-processing submodule, which is used to optimize the output signal according to a preset post-processing method before outputting it when the output signal is an audio signal.

3. The signal control system driven by a single power amplifier according to claim 1, characterized in that, The signal control module further includes a device protection submodule, which is used to perform real-time power control processing on the output signal and output it according to the parameter model of the two-in-one device, so as to avoid the power of the output signal exceeding the maximum operating power of the two-in-one device.

4. The signal control system driven by a single power amplifier according to claim 1, characterized in that, The signal control module further includes a nonlinear compensation submodule, which is used to perform nonlinear harmonic compensation on the output signal and output it according to the parameter model of the two-in-one device.

5. The signal control system driven by a single power amplifier according to claim 1, characterized in that, The first device is a loudspeaker, and the second device is a vibration motor.

6. The signal control system driven by a single power amplifier according to claim 1, characterized in that, The preamplifier circuit module includes a signal source and a capacitor for receiving the amplified drive signal. The positive terminal of the signal source is connected to the first terminal of the capacitor, the negative terminal of the signal source is connected to the second terminal of the capacitor, and the negative terminal of the signal source is grounded. The first device is connected in series between the second terminal of the capacitor and the negative terminal of the signal source, so that the capacitor acts as the high-pass filter unit and loads the high-frequency signal passing through the capacitor to the first device. The capacitor is connected in parallel with the second device to act as the low-pass filter unit and loads the low-frequency signal blocked by the capacitor to the second device.

7. A signal control method for a dual-in-one device driven by a single power amplifier, the dual-in-one device comprising at least a speaker having a first input terminal and a vibration motor having a second input terminal, characterized in that, The signal control method includes the following steps: Receive audio signals and / or vibration signals, and generate an output signal for driving the two-in-one device; The output signal is amplified to obtain an amplified drive signal; The amplified drive signal is applied to the speaker and / or the vibration motor through an analog circuit to drive the two-in-one device; The signal control method for the dual-function device driven by a single power amplifier is implemented based on the signal control system for driving a single power amplifier as described in any one of claims 1 to 6.

8. The signal control method for a dual-function device driven by a single power amplifier according to claim 7, characterized in that, The step of applying the amplified drive signal to the speaker and / or the vibration motor through an analog circuit is specifically as follows: The amplified drive signal is filtered, and high-frequency signals above a preset filtering frequency in the amplified drive signal are applied to the speaker; and / or, The low-frequency signal below the preset filtering frequency in the amplified drive signal is loaded into the vibration motor.

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