Signal processing device and electronic equipment

Abstract

Disclosed is an audio and tactile signal processing device and an electronic device. According to one embodiment, a signal processing device may include: at least one input port for receiving an audio signal and a tactile signal; a first filter for filtering the audio signal; a second filter for filtering the tactile signal; a mixer for mixing the filtered audio signal and the tactile signal to obtain a superimposed signal; a power amplifier for amplifying the superimposed signal; and at least one output port for outputting the amplified audio signal and the tactile signal. The utility model can reduce the use of some components in electronic devices, reduce power consumption, and save the manufacturing cost of the device.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an audio and tactile signal processing device and an electronic device. Background Art

[0002] As the functions of various electronic devices such as smartphones and tablets become more and more abundant, the number of electronic components that need to be integrated into the devices continues to increase. Among them, the tactile vibration function is realized by a vibration motor, and the audio playback function is realized by a speaker.

[0003] Existing vibration and audio output solutions generally use two independent driver chips to achieve vibration and audio output respectively, that is, the vibration output device includes a driver chip that receives and processes vibration signals to drive the motor to vibrate, and the audio output device includes a driver chip that receives and processes audio signals to drive the speaker to play audio. This driving method not only increases the power consumption of the entire device, but also occupies a large space for the hardware and has high manufacturing costs. Utility Model Content

[0004] In order to solve at least one of the above-mentioned technical problems in the prior art, the utility model provides a processing device and an electronic device for audio and tactile signals.

[0005] According to one aspect of the utility model, a signal processing device is provided, which may include: at least one input port for receiving an audio signal and a tactile signal; a first filter for filtering the audio signal; a second filter for filtering the tactile signal; a mixer connected to the first filter and the second filter, for mixing the filtered audio signal and the tactile signal to obtain superimposed audio and tactile signals; a power amplifier connected to the mixer, for amplifying the superimposed audio signal and tactile signal; and at least one output port for outputting the amplified audio signal and tactile signal.

[0006] In some embodiments, the signal processing device also includes: a divider, which is connected to the power amplifier and is used to perform frequency division processing on the amplified signal to restore the audio signal and the tactile signal, wherein the at least one output port includes a first output port and a second output port, which are used to output the audio signal and the tactile signal, respectively.

[0007] In some embodiments, the at least one output port includes only one output port, which outputs the superimposed audio signal and tactile signal, and (i) the signal processing device also includes a frequency divider connected to the one output port, which is used to perform frequency division processing on the superimposed audio signal and tactile signal to restore the audio signal and the tactile signal, and the restored audio signal and tactile signal are respectively provided to a speaker and a tactile output device, or (ii) the signal processing device also includes a third filter connected to the one output port, and the superimposed audio signal and tactile signal are filtered by the third filter to remove the tactile signal component and then provided to the speaker, and the superimposed audio signal and tactile signal are directly provided to the tactile output device

[0008] In some embodiments, the first filter is a high-pass filter, which is used to make the audio signal in a first frequency band, and the second filter is a low-pass filter, which is used to make the tactile signal in a second frequency band, and the second frequency band is different from the first frequency band. For example, the high-pass filter makes the frequency of the audio signal higher than a predetermined frequency, and the low-pass filter makes the frequency of the tactile signal lower than the predetermined frequency, so that the audio signal and the tactile signal are in different frequency ranges.

[0009] In some embodiments, the signal processing device further includes: a boost conversion circuit, which is connected to the amplifier and is used to convert the power supply voltage into a high voltage, and the high voltage is used to power the power amplifier.

[0010] In some embodiments, the power amplifier is a class D amplifier, and / or the boost conversion circuit is a DC-DC boost converter or a charge pump.

[0011] In some embodiments, the signal processing device is formed as a single chip.

[0012] According to another aspect of the utility model, a signal processing device is provided, which may include: at least one input port for receiving an audio signal and a tactile signal; a first power amplifier for amplifying the audio signal; a second power amplifier for amplifying the tactile signal; a boost conversion circuit connected to the first power amplifier and the second power amplifier, for converting a power supply voltage into a high voltage, and the high voltage is used to power the first power amplifier and the second power amplifier; a first output port for outputting an amplified audio signal; and a second output port for outputting an amplified tactile signal.

[0013] In some embodiments, the power amplifier is a class D amplifier, and / or the boost conversion circuit is a DC-DC boost converter or a charge pump.

[0014] In some embodiments, the signal processing device also includes: a first detection circuit for detecting the voltage of the audio signal; a second detection circuit for detecting the voltage of the tactile signal; a voltage determination circuit for determining an expected value of the high voltage output by the boost conversion circuit based on the detection results of the first detection circuit and the second detection circuit; and a control circuit for controlling the boost conversion circuit based on the expected value so that the boost conversion circuit outputs a high voltage of the expected value.

[0015] In some embodiments, the signal processing device also includes: a first voltage divider circuit, which is arranged between the first power amplifier and the boost conversion circuit; and a second voltage divider circuit, which is arranged between the second power amplifier and the boost conversion circuit, wherein the control circuit also controls the first voltage divider circuit and the second voltage divider circuit to provide a first supply voltage and a second supply voltage to the first power amplifier and the second power amplifier, respectively.

[0016] In some embodiments, the signal processing device is formed as a single chip.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising the vibration and audio signal processing device described above, wherein the electronic device can be any terminal device with voice playback function and tactile output, for example, a smart phone, a smart watch, a tablet computer, etc.

[0018] Compared with the prior art, the audio and tactile signal processing device of the embodiment of the present application can realize the reuse of some electronic components, so that the driving chips of the vibration motor and the speaker form a two-in-one device. For example, only one boost circuit is needed to simultaneously power the tactile and audio power amplifiers for signal amplification processing. In some embodiments, a power amplifier can be omitted, that is, only one power amplifier can be used to drive the motor and the speaker at the same time, which reduces the use of components such as boost circuits and capacitors in the power amplifier, which not only reduces the power consumption and cost of the overall device, but also saves the area occupied by the device, which is conducive to the miniaturization of electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the utility model embodiments in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the utility model will become more apparent. The accompanying drawings are used to provide a further understanding of the utility model embodiments, and constitute a part of the specification, and are used together with the utility model embodiments to explain the utility model, and do not constitute a limitation of the utility model. In the accompanying drawings, the same reference numerals usually represent the same parts. It should be understood that the size and size of the parts shown in the figures are not necessarily drawn to scale, and they may be different from the embodiments shown here for implementation. In addition, some embodiments can be combined with any suitable combination of features from two or more drawings.

[0020] Figure 1 is a schematic structural diagram of a vibration and audio processing device according to an embodiment of the present application;

[0021] Figure 2 is a structural schematic diagram of a vibration and audio processing device according to another embodiment of the present application;

[0022] Figure 3 FIG. 4 is a schematic structural diagram of a vibration and audio processing device according to another embodiment of the present application. DETAILED DESCRIPTION

[0023] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. At the same time, it is not necessary to realize all the above advantages at the same time to implement any example of the embodiments of the present application. It should be understood that the present application should not be limited to the specific details of these example embodiments. Instead, the embodiments of the present application can be implemented without these specific details or by adopting other alternatives, without departing from the ideas and principles of the present application defined in the claims.

[0024] As described in the background technology section, in order to increase the functions of electronic devices in the prior art, it is usually necessary to set up independent driving circuits for audio and tactile (vibration) signals, which makes them more expensive and consumes more power. To this end, an embodiment of the present application provides a processing device for audio and tactile signals, which saves space in electronic devices and reduces equipment costs by integrating audio and tactile driving circuits into a two-in-one device with an integrated structure.

[0025] Figure 1 FIG. 1 shows a schematic diagram of the structure of an audio and tactile signal processing device 100 according to an embodiment of the present application. Figure 1The device includes an input port (PI) and an output port (PO), an audio signal filter 110, a tactile signal filter 120, a mixer 130, a power amplifier 140, a boost converter circuit 150, a divider 160, and a control circuit 170. The signal processing device 100 can receive audio signals and tactile signals through the input port, and can be connected to a speaker 180 and a motor 190 through the output port to output audio and tactile effects.

[0026] Although Figure 1 It is not shown in the figure, but it is understood that the signal processing device 100 may also include other devices. For example, the input audio signal may first be converted from digital to analog by an audio processor to obtain an analog signal for subsequent processing. The audio processor may include an audio codec and a digital signal processor (DSP), wherein the digital signal processor (DSP) may also include a filter to implement a filtering function. At the same time, the input tactile signal (e.g., a digital waveform signal) may also first be converted from digital to analog to form an analog signal for subsequent processing to obtain a motor drive signal.

[0027] Figure 1 , two input ports PI1 and PI2 are shown for receiving audio signals and tactile signals respectively, but it can be understood that the signal processing device 100 may include multiple input ports to receive multi-channel audio or tactile signals, and this application does not specifically limit this. Alternatively, the signal processing device 100 may also include only one input port, and the audio signal component and the tactile signal are input into the signal processing device 100 through the input port in a time-division multiplexing manner, and the input signal can then be provided to the corresponding audio signal filter 110 and tactile signal filter 120 through a demultiplexing unit to provide the audio signal component and the tactile signal component therein.

[0028] In one embodiment, the audio signal filter 110 is connected to the input port PI1 or the demultiplexing unit (not shown) for filtering the input audio signal, and the vibration signal filter 120 is connected to the input port PI2 or the demultiplexing unit for filtering the input tactile signal. In one embodiment, the filters 110 and 120 may be integrated in a digital signal processor or other components, or may be separately provided, which is not specifically limited in this application.

[0029] The operating frequency band of the speaker covers the hearing frequency range of the human ear, that is, the ideal range is 20Hz-20KHz, which is generally 150-350Hz, and typically above 200Hz. On the other hand, the operating frequency band of the motor is determined by its resonant frequency, which is generally below 200Hz. In order to make the motor produce a higher vibration level, the waveform frequency of the tactile signal can be selected to be equal to or close to the resonant frequency of the motor. To this end, in one embodiment, the audio signal filter 110 can be selected as a high-pass filter to make the audio signal in a first frequency band, and the tactile signal filter can be selected as a low-pass filter to make the tactile signal in a second frequency band, which is different from the first frequency band. Specifically, the filter cutoff frequencies of the high-pass filter and the low-pass filter can be selected to be the same, that is, the high-pass filter 110 will pass the audio signal above the predetermined frequency f, and the low-pass filter 120 will pass the tactile signal below the predetermined frequency f, so that the two filtered signals are in different frequency ranges and will not form mutual crosstalk. The range of the predetermined filtering frequency f may be 170-200 Hz, for example, 170 Hz, 180 Hz, 200 Hz, etc., which may be determined or adjusted according to actual conditions. In some embodiments, the filter cutoff frequencies of the high-pass filter and the low-pass filter may also be selected to be different, so that the frequency ranges of the two filtered signals are separated from each other, which further avoids or reduces crosstalk between signals.

[0030] The mixer 130 is electrically connected to the output ends of the audio signal filter 110 and the tactile signal filter 120, and is used to mix the filtered audio signal and the vibration signal to obtain a superimposed audio signal and a tactile signal, and provide the filtered combined signal to a subsequent power amplifier for signal amplification processing. Since the frequency ranges of the audio signal and the tactile signal are different after the previous filtering process, the mixer 130 can directly add the audio signal and the tactile signal based on the frequency to obtain a combined driving signal with the frequencies of the audio signal and the tactile signal.

[0031] In one embodiment, the mixer 130 may be connected to the control circuit 170, and the control circuit 170 enables the mixer 130 and processes the two signals through a control signal. For example, in the case where the audio signal and the tactile signal are input to the processing device 100 through time division multiplexing, the mixer 130 may first perform a delay process on the received audio signal or tactile signal so that the two are synchronously aligned in timing, thereby facilitating the mixing process.

[0032] By mixing two analog signals to obtain a combined signal, this embodiment can use one power amplifier to achieve simultaneous amplification of the two signals, which reduces the use of one power amplifier compared to the prior art, thereby reducing the power consumption of the entire device. It can be understood that in actual applications, the speaker and the motor can work separately, that is, the input signal of the mixer 130 can only be an audio signal or a tactile vibration signal, and not necessarily a combined signal.

[0033] Reference Figure 1 The power amplifier 140 is connected to the mixer 130 and is used to amplify the superimposed audio signal and tactile signal and output the amplified superimposed signal.

[0034] In one embodiment, the power amplifier 140 may be a class D amplifier, which may include components such as a PWM conversion circuit, a voltage converter, and a power output circuit. After the input superimposed analog signal is modulated by the PWM circuit, a pulse signal whose duty cycle is a certain proportion to the input signal is formed. The voltage converter can be used to convert the pulse signal from the power supply voltage domain (VBAT voltage domain) to the high voltage domain (PVDD voltage domain) at a high voltage, that is, the amplitude of the pulse signal is amplified. The power output circuit processes the amplified PWM signal to obtain a drive signal. It can be understood that in other embodiments, other types of power amplifiers, such as class A amplifiers, class B amplifiers, class AB amplifiers, etc., can also be used, as long as the predetermined voltage domain is reached.

[0035] In one embodiment, the power supply voltage VBAT may be provided by a lithium battery, which is, for example, 4V. The working voltage of the speaker is typically 12-15V, and the working voltage of the motor is typically 11-12V, both of which are higher than the power supply voltage. Therefore, a boost circuit 150 is required to convert the power supply voltage into a high voltage, which is used to power the power amplifier 140. In one embodiment, the high voltage may be, for example, 11-15V, preferably 12V, so as to drive the speaker and the motor to work normally.

[0036] The boost converter circuit 150 is connected to the power amplifier 140, which can be a type of DC / DC converter circuit, such as a BOOST circuit, or a charge pump circuit. Taking the charge pump as an example, it has an input terminal, such as coupled to the power supply voltage VBAT, and the charge pump can also receive a clock signal (for example, provided under the control of the control circuit 170) to generate an output voltage at the output terminal by, for example, performing a boost operation on the input voltage through its internal switch circuit and one or more capacitors, and the output terminal can be coupled to the power amplifier 140 to provide it with a high voltage in the PVDD domain. Since only one boost converter circuit 150 is required to power the power amplifier 140, it can be said that this embodiment also reduces the use of capacitor devices compared to the prior art, and further reduces the occupied area of ​​the device.

[0037] In this embodiment, the signal processing device 100 is formed as a single chip. Figure 1 It is shown that the boost converter circuit 150 and other components are integrated inside the signal processing device 100 , but they can also be implemented outside the chip as long as a corresponding interface is set on the signal processing device 100 to receive the PVDD output of the boost converter circuit 150 .

[0038] The frequency divider 160 is connected to the power amplifier 160, and is used to perform frequency separation processing on the signal amplified by the power amplifier to restore the audio signal and the tactile signal. For example, the frequency divider 160 can output the high-frequency components above 200Hz in the mixed signal (i.e., the audio drive signal) to the speaker 180 through high-pass filtering, and at the same time output the low-frequency components below 200Hz in the mixed signal (i.e., the tactile drive signal) to the motor 190 through low-pass filtering. For example, the signal processing device 100 can be provided with two output ports PO1 and PO2 for outputting audio signals and tactile signals respectively, and the speaker 180 and the motor 190 can be connected to the output ports to receive the corresponding drive signals.

[0039] Although Figure 1 The crossover 160 is shown to be integrated inside the signal processing device 100, but it can be understood that it can also be implemented outside the chip. In this case, the signal processing device 100 only needs to set up an output port, and the superimposed signal of the amplified audio signal and the tactile signal is output from the output port. The crossover 160 is connected to the output port and performs frequency separation processing on the superimposed signal to restore the audio signal and the tactile signal. The restored audio signal and tactile signal are provided to the speaker and the motor respectively.

[0040] In one embodiment, the frequency divider may not be provided. Figure 2 1 shows a schematic diagram of the structure of a vibration and audio processing device according to another embodiment of the present application, which includes filters 110, 120, a mixer 130, a power amplifier 140, and a boost circuit 150. The arrangement and functions of these devices or circuits are similar to those of Figure 1 The circuits shown are the same and will not be described again here.

[0041] like Figure 2As shown, the signal processing device 100 may include only one output port PO, and the filter 125 (e.g., a high-pass filter) is connected to the output port PO, which is used to filter the superimposed audio signal and tactile signal to remove the tactile signal component, and then provide it to the speaker 180, and the superimposed signal is directly (without filtering) provided to the motor 190. Since the motor has a narrow response frequency, it can suppress high-frequency signals, so even if the superimposed signal is directly provided to the motor, it will not affect the output tactile effect. Alternatively, other components (e.g., capacitors) can be used to separate the audio signal and the tactile signal from the superimposed signal, which is also within the scope of protection of this application.

[0042] refer to Figure 1-2 The speaker 180 can generate sound under the audio driving signal, and the motor 190 can generate tactile effect under the tactile driving signal. The speaker 180 and the motor 190 can respectively adopt existing conventional devices such as flat panel speakers and piezoelectric ceramic motors.

[0043] This embodiment reduces the use of power amplifiers and boost devices by superimposing audio signals and tactile signals into one driving signal, saves costs, and reduces the power consumption of electronic equipment.

[0044] Figure 3 FIG. 1 is a schematic diagram of the structure of a vibration and audio processing device according to another embodiment of the present application. Figure 1 and Figure 2 In the illustrated solution, this embodiment no longer performs filtering processing on the audio signal or the tactile signal, thereby avoiding signal distortion and improving the acoustic or tactile effect.

[0045] like Figure 3 As shown, the audio and tactile signal processing device is composed of two relatively independent processing circuits. For example, the audio signal link may include an audio preprocessing circuit 212, a power amplifier 214, a detection circuit 216, and a voltage divider circuit 218, and the tactile signal link may include a tactile preprocessing circuit 222, a power amplifier 224, a detection circuit 226, and a voltage divider circuit 228. The signal processing device 200 can receive audio signals and tactile signals through an input port, and can be connected to a speaker 250 and a motor 260 through an output port to output audio and tactile effects.

[0046] In this embodiment, the power amplifier 214 for audio signals and the power amplifier 224 for tactile signals use a boost circuit 240 for high voltage power supply. In some embodiments, in order to control the supply voltages separately, this embodiment may further include a voltage determination circuit 220, wherein the voltage determination circuit 220, the voltage divider circuits 218, 228, and the boost circuit 240 are all controlled by the control circuit 230, and the specific functions thereof will be described below.

[0047] Figure 3 Two input ports PI1 and PI2 are shown for receiving audio signals and tactile signals respectively, but it can be understood that the signal processing device 200 may include multiple input ports to receive multi-channel audio or tactile signals, and this application does not specifically limit this. Alternatively, the signal processing device 200 may also include only one input port, and the audio signal component and the tactile signal are input to the signal processing device 200 via the input port in a time-division multiplexing manner. The input signal can be provided to the corresponding signal processing link through the demultiplexing unit to input the audio signal component and the tactile signal component.

[0048] In one embodiment, the audio preprocessing circuit 212 is connected to the input port PI1 or the demultiplexing unit, and can receive the digital audio signal and perform digital-to-analog conversion and other processing to obtain an analog signal for subsequent processing to obtain a speaker drive signal, which can be implemented using a digital-to-analog converter (DAC). Similarly, the tactile preprocessing circuit 222 can also be a digital-to-analog converter, which is connected to the input port PI2 or the demultiplexing unit, and performs digital-to-analog conversion on the input tactile signal (e.g., a digital waveform signal) to form an analog signal for subsequent processing to obtain a motor drive signal. It can be understood that, depending on the type of file received, the preprocessing circuit may also include an encoding / decoding unit.

[0049] The audio power amplifier 214 is connected to the audio preprocessing circuit 212 and is used to amplify the audio signal and output the amplified audio signal. The tactile power amplifier 224 is connected to the tactile preprocessing circuit 222 and is used to amplify the tactile signal and output the amplified tactile signal.

[0050] In one embodiment, the audio power amplifier 214 and the tactile power amplifier 224 may select the same or different types of power amplifiers. For example, one of the following amplifiers may be used: a class A audio power amplifier, a class B audio power amplifier, a class AB audio power amplifier, and a class D audio power amplifier. Taking a class D amplifier as an example, it may include components such as a PWM conversion circuit, a voltage converter, and a power output circuit. After the input audio or tactile analog signal is modulated and processed by the PWM circuit, a pulse signal with a duty cycle that is a certain proportion to the input signal is formed. The voltage converter can be used to convert the pulse signal from the power supply voltage domain (VBAT voltage domain) to a high voltage domain (PVDD voltage domain) at a high voltage, that is, the amplitude of the pulse signal is amplified. The power output circuit processes the amplified PWM signal to obtain an audio or vibration drive signal.

[0051] In one embodiment, the power supply voltage VBAT may be provided by a lithium battery, which is, for example, 4V. The working voltage of the speaker is typically 12-15V, and the working voltage of the motor is typically 11-12V, both of which are higher than the power supply voltage. Therefore, a boost circuit 240 is required to convert the power supply voltage into a high voltage, which is used to power the power amplifiers 214 and 224. In one embodiment, the high voltage may be, for example, 11-15V, preferably 12V, so as to drive the speaker and the motor to work normally.

[0052] In one embodiment, the boost converter circuit 240 can be connected to the power amplifiers 214 and 224, which can be a type of DC / DC converter circuit, such as a BOOST circuit, or a charge pump circuit. Taking the charge pump as an example, it has an input end, such as coupled to a power supply voltage, and the charge pump can also receive a clock signal to generate an output voltage at the output end by boosting the input voltage through, for example, its internal switch circuit and one or more capacitors, and the output end can be coupled to the power amplifiers 214 and 224 to provide them with a high voltage in the PVDD domain. Since only one boost converter circuit 240 is required to power the two power amplifiers 214 and 224, that is to say, compared with the prior art, this embodiment reduces the use of devices such as capacitors, thereby reducing the occupied area and reducing the equipment cost.

[0053] In practice, due to the different parameters of the audio signal and the tactile signal, the operating voltages of the speaker 250 and the motor 260 may be different. If the same supply voltage is used to power the power amplifiers 214 and 224, the audio or tactile output effect may deviate from the ideal state. Figure 3 As shown, the signal processing device 200 may include a detection circuit 216 and a detection circuit 226, which are used to detect the voltage of the audio signal and the tactile signal respectively. The detection circuits 216 and 226 may be as shown in FIG. Figure 3 The detection circuits 216 and 226 are connected to the input terminals of the power amplifiers 214 and 224, and the output voltage values ​​of the corresponding amplifiers can be obtained by gain conversion. The present application is not limited thereto, and the detection circuits 216 and 226 can also be coupled to the output terminals of the corresponding amplifiers, and can directly detect the output voltages of the amplifiers.

[0054] In one embodiment, the output terminals of the detection circuits 216 and 226 are connected to the voltage determination circuit 220, which can receive the detection voltages of the two detection circuits and determine the expected value of the high voltage output by the boost conversion circuit 240 based on the detection results of the detection circuits 216 and 226. For example, the boost conversion circuit 240 can use the larger value of the expected value of the audio signal voltage V1 and the expected value of the tactile signal voltage V2 determined by the two detection circuits as the high voltage value V outputted by it, that is, V=max(V1, V2).

[0055] After determining the expected value V of the output high voltage, the voltage determination circuit 220 can send a relevant signal of the value to the control circuit 230, which can control the boost conversion circuit 240 to perform a boost operation based on the expected voltage value V, so that the boost conversion circuit 240 outputs a high voltage with the expected value V.

[0056] Since the output voltage of the boost converter circuit 240 may be higher than V1 or V2, a voltage divider circuit needs to be provided to apply the expected voltage value to the power amplifiers 214 and 224. Figure 3 As shown, the voltage divider circuit 218 is arranged between the power amplifier 214 and the boost converter circuit 240, and the voltage divider circuit 228 is arranged between the power amplifier 224 and the boost converter circuit 240, which can be used to step down the output voltage of the boost converter circuit 240, and its specific structure can adopt the conventional voltage divider circuit available in the art, which is not specifically limited in this application. The voltage divider circuits 218 and 228 are connected to the control circuit 230, and the control circuit can control the voltage divider circuit 218 and the voltage divider circuit 228 to provide the expected power supply voltage V1 and the power supply voltage V2 to the power amplifier 214 and the power amplifier 224, respectively, so that the amplified audio signal and the tactile signal have the expected driving effect.

[0057] The signal processing device 200 may be provided with two output ports PO1 and PO2 for outputting audio signals and tactile drive signals, respectively. The speaker 250 and the motor 260 may be connected to the output ports to receive corresponding drive signals. For example, the speaker 250 is connected to the audio power amplifier 214 via the output port PO1, and is used to receive the audio amplification signal and output it to produce sound. The motor 260 is connected to the tactile power amplifier 224 via the output port PO2, and is used to receive the tactile amplification signal and output it to produce a tactile effect. Among them, the speaker 250 and the motor 260 may respectively adopt existing conventional devices such as flat-panel speakers and piezoelectric ceramic motors, which are not specifically limited in this embodiment.

[0058] In this embodiment, the signal processing device 200 is formed as a single chip. Figure 3 The voltage conversion elements such as the boost circuit 240, the voltage divider circuit 218, and the voltage divider circuit 228 are shown to be located inside the signal processing device 200, but they can also be implemented outside the chip as long as a corresponding interface is set on the signal processing device 200 to receive the output voltage of the voltage divider circuit.

[0059] The embodiment of the utility model also provides an electronic device, which includes the vibration and audio processing device described above. In one embodiment, the electronic device can be a portable mobile electronic device, such as a smart phone, a personal digital assistant, a personal terminal device, a tablet computer, a wearable electronic device, etc. Since the electronic device in this embodiment integrates the audio and vibration drive circuits in two-in-one, it can be miniaturized and reduce the power consumption and cost of the overall device.

[0060] As used herein, words such as "include," "comprises," "have," and the like are open ended words that mean "including but not limited to," and are used interchangeably therewith. The words "or" and "and" as used herein mean the words "and / or," and are used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as," as used herein, means the phrase "such as but not limited to," and is used interchangeably therewith.

[0061] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many combinations, modifications, and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A signal processing device, characterized in that: include: at least one input port for receiving an audio signal and a tactile signal; A first filter, used to filter the audio signal; a second filter, configured to filter the tactile signal; a mixer connected to the first filter and the second filter, and configured to mix the filtered audio signal and the tactile signal to obtain a superimposed audio signal and a tactile signal; a power amplifier connected to the mixer and configured to amplify the superimposed audio signal and tactile signal; as well as At least one output port is used to output the amplified audio signal and tactile signal.

2. The signal processing device according to claim 1, characterized in that The signal processing device further comprises: a frequency divider connected to the power amplifier and used to perform frequency division processing on the amplified signal to restore the audio signal and the tactile signal, The at least one output port includes a first output port and a second output port, which are used to output the audio signal and the tactile signal respectively.

3. The signal processing device according to claim 1, characterized in that: The at least one output port includes only one output port that outputs the superimposed audio signal and haptic signal, and (i) the signal processing device further comprises a frequency divider connected to the one output port, for performing frequency division processing on the superimposed audio signal and tactile signal to restore the audio signal and the tactile signal, and the restored audio signal and tactile signal are provided to a speaker and a tactile output device, respectively; or (ii) the signal processing device further comprises a third filter connected to the one output port, the superimposed audio signal and tactile signal are filtered by the third filter to remove the tactile signal component and then provided to the speaker, and the superimposed audio signal and tactile signal are directly provided to the tactile output device.

4. The signal processing device according to claim 1, characterized in that: The first filter is a high-pass filter, which is used to make the audio signal in a first frequency band, and the second filter is a low-pass filter, which is used to make the tactile signal in a second frequency band, which is different from the first frequency band.

5. The signal processing device according to claim 1, characterized in that: The signal processing device further comprises: A boost conversion circuit is connected to the amplifier and is used to convert the power supply voltage into a high voltage, and the high voltage is used to power the power amplifier.

6. The signal processing device according to claim 4, characterized in that: The power amplifier is a class D amplifier.

7. The signal processing device according to claim 5, characterized in that: The boost conversion circuit is a DC-DC boost converter or a charge pump.

8. The signal processing device according to any one of claims 1 to 7, characterized in that: The signal processing device is formed as a single chip.

9. An electronic device, characterized in that: The electronic device comprises the signal processing device according to any one of claims 1 to 8.

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