Multistage signal processing circuit and electronic device

Abstract

The multistage signal processing circuit and the electronic equipment provided in the application, each signal processing circuit in the multistage signal processing circuit comprises a plurality of signal processing modules, which can be used for amplifying or reducing the signal; and the signal output end of each signal processing module can be used for connecting with the signal acquisition module, so that the signal acquisition module can acquire the signal output by one of the signal processing modules according to the requirement; therefore, the signal processing circuit can adapt to various signal processing requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit, in particular, to a multi-stage signal processing circuit and electronic equipment. BACKGROUND

[0002] In the signal processing process, the original signal obtained often needs to be amplified or reduced to meet the sampling requirements. However, research has found that the circuit for amplifying or reducing the signal currently has poor adaptability, so that the corresponding circuit needs to be designed for different signal processing requirements. SUMMARY

[0003] In order to overcome at least one of the deficiencies in the prior art, the present application provides a multi-stage signal processing circuit and electronic equipment, comprising:

[0004] In a first aspect, the present application provides a multi-stage signal processing circuit, the multi-stage signal processing circuit comprising at least one signal processing line;

[0005] For each signal processing line, the signal processing line comprises a plurality of signal processing modules with a predetermined connection relationship, wherein each signal processing module is used to amplify the input signal, or each signal processing module is used to reduce the input signal;

[0006] The signal output end of each signal processing module is further connected with a signal acquisition module, so that the signal acquisition module can acquire the output signal processed by each signal processing module.

[0007] In a second aspect, the present application provides an electronic device comprising the multi-stage signal processing circuit.

[0008] Compared with the prior art, the present application has the following beneficial effects:

[0009] The multi-stage signal processing circuit and electronic equipment provided in the embodiment can be used to amplify or reduce the signal, and the signal output end of each signal processing module can be connected with the signal acquisition module, so that the signal acquisition module can acquire the signal output by one of the signal processing modules according to the needs; therefore, the signal processing line can adapt to various signal processing requirements. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0011] Figure 1 Structure schematic diagram of the amplification circuit provided by the embodiments of the present application;

[0012] Figure 2 Structure schematic diagram of the amplification circuit provided by the embodiments of the present application;

[0013] Figure 3 Amplification circuit with delay module provided by the embodiments of the present application;

[0014] Figure 4 Amplification circuit with adaptive feedback module provided by the embodiments of the present application;

[0015] Figure 5 Amplification circuit with filter module provided by the embodiments of the present application;

[0016] Figure 6 Structure schematic diagram of the first circuit and the second circuit provided by the embodiments of the present application;

[0017] Figure 7 Structure schematic diagram of the electronic device provided by the embodiments of the present application.

[0018] Icon: 101-first amplifier; 102-second amplifier; 103-third amplifier; 104-first delay module; 105-second delay module; 106-third delay module; 107-first feedback switch; 108-second feedback switch; 109-first feedback module; 110-second feedback module; 111-first filter module; 112-second filter module; 113-third filter module; 114-first circuit; 115-second circuit; 116-comparison module; 117-first selection switch; 118-second selection switch; 10-multi-stage signal processing circuit; 220-memory; 230-processor; 240-communication unit. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0021] At present, when designing a circuit board, the corresponding circuit is often designed according to the signal processing requirements. Taking an amplification circuit as an example, because different products process different signals, the demand for the amplification factor of the amplification circuit is also different, and therefore, it is necessary to design a corresponding amplification circuit for different amplification factors.

[0022] In view of this, the present embodiment provides a multi-stage signal processing circuit, which comprises at least one signal processing line; for each signal processing line, the signal processing line comprises a plurality of signal processing modules in a predetermined connection relationship, wherein each signal processing module is used to amplify the input signal, or each signal processing module is used to reduce the input signal.

[0023] The signal output end of each signal processing module is also used to be connected with a signal acquisition module, so that the signal acquisition module can acquire the output signal processed by each signal processing module.

[0024] As shown in Figure 1 , it is assumed that the signal processing line is an amplification line, which comprises a plurality of amplifiers connected in series, namely a first amplifier 101, a second amplifier 102 and a third amplifier 103. The signal output end of each amplifier is in communication connection with a signal acquisition module, so that the signal acquisition module can acquire the output signal of each amplifier. Moreover, because the plurality of amplifiers are connected in series, the signal amplification factor of the signal output end of each amplifier is different, so that the signal acquisition module can acquire the signal output by any one of the amplifiers according to the design requirements.

[0025] As an example, the amplification line constructed by the amplifiers in Figure 1 is taken as an example. As shown in Figure 2 , the predetermined connection relationship between the first amplifier 101, the second amplifier 102 and the third amplifier 103 is a parallel connection, and the signal input end of the first amplifier 101, the second amplifier 102 and the third amplifier 103 is used to receive the same signal, and the signal output end of each amplifier is in communication connection with a signal acquisition module, so that the signal acquisition module can acquire the output signal of each amplifier, and thus the signal acquisition module can acquire the signal output by any one of the amplifiers according to the design requirements.

[0026] Based on the above embodiment, each signal processing line in the multi-stage signal processing circuit includes a plurality of signal processing modules, which can be used for amplifying or reducing the signal; and the signal output end of each signal processing module can be used for connecting with the signal acquisition module, so that the signal acquisition module can acquire the signal output by one of the signal processing modules as needed; therefore, the signal processing line can adapt to various signal processing requirements.

[0027] In the embodiment, the plurality of signal processing modules are connected in series. In order to reduce the number of occupied sampling channels of the sampling module by the signal processing line, for each signal processing module, the signal processing line further includes a delay module connected with the signal output end of the signal processing module; and if the delay module is not located at the end of the signal processing line, the first output end of the delay module is connected with the input end of the next signal processing module adjacent to the signal processing module.

[0028] The second output end of each delay module is used for connecting with the same sampling channel of the signal acquisition module; and the delay module is used for transmitting the output signal of the signal processing module to the sampling channel during the delay period, and transmitting the output signal of the signal processing module to the next signal processing module adjacent to the signal processing module after the delay period.

[0029] For example, continue to take the amplification line constructed by the plurality of amplifiers in Figure 1 as an example, but different from Figure 1 , each amplifier in Figure 3 is configured with a delay module, which is a first delay module 104, a second delay module 105 and a third delay module 106 respectively, and the signal holding time of each delay module is 10 ms; then if the first amplifier 101 inputs the amplified signal from the signal output end to the first delay module 104, the first delay module 104 will hold the amplified signal in the sampling channel of the sampling module for 10 ms, so that the sampling module has enough time to sample the signal amplified by the first amplifier 101; then when the time exceeds 10 ms, the first delay module 104 will input the amplified signal to the second amplifier 102, so that the second amplifier 102 continues to amplify the input signal.

[0030] Since each delay module can make the signal acquisition module have sufficient time to collect the signal in the sampling channel, even if the second output end of all delay modules is used for connecting with the same sampling channel of the signal acquisition module, the signals output between the modules can not interfere with each other, so that the second output end of all delay modules can be connected with the same sampling channel of the signal acquisition module, thereby reducing the number of occupied sampling channels of the sampling module.

[0031] Of course, the delay module in this embodiment can be implemented using a delay circuit, and the delay duration of the delay module can be adjusted as needed. This embodiment does not impose any specific limitations.

[0032] In this embodiment, multiple signal processing modules are connected in series. To enable the signal processing circuit to automatically output a signal that meets the amplification factor or reduction factor, the signal processing circuit also includes feedback switches located between adjacent signal processing modules. Furthermore, for each feedback switch, the signal processing circuit also includes an adaptive feedback module configured for the feedback switch.

[0033] The signal input terminal of the adaptive feedback module is connected to the signal input terminal of the target signal processing module, and the signal output terminal of the adaptive feedback module is connected to the control terminal of the corresponding feedback switch. The target signal processing module is the previous or next signal processing module connected to the feedback switch.

[0034] It should be understood that the adaptive feedback module is used to disconnect the feedback switch when the output signal of the target signal processing module meets the preset conditions.

[0035] For example, such as Figure 4 As shown, continue with Figure 1 Taking the amplification circuit constructed by multiple amplifiers in the example, but with Figure 1 The difference is, Figure 4 The amplifiers in the circuit are connected via feedback switches, including a first feedback switch 107 and a second feedback switch 108, wherein each feedback switch is in the off state by default. Furthermore, each feedback switch is equipped with an adaptive feedback module, namely a first feedback module 109 and a second feedback module 110. The signal output terminal of the first feedback module 109 is connected to the control terminal of the first feedback switch 107 to control the first feedback switch 107; the signal output terminal of the second feedback module 110 is connected to the control terminal of the second feedback switch 108 to control the second feedback switch 108.

[0036] The signal source at the input terminal of each adaptive feedback module is related to the user-defined shutdown condition. For example, if the voltage of the amplifier output signal is higher than 5% of the maximum sampling value of the sampling channel, it indicates a risk of signal distortion. Therefore, the second amplifier 102 can be selected as the target signal processing module, and the signal input terminal of the first feedback switch 107 can be connected to the signal output terminal of the second amplifier 102. If the voltage of the amplifier output signal is between 80% and 90% of the maximum sampling value of the sampling channel, it indicates that the signal amplification factor is just right. Therefore, the second amplifier 102 can be selected as the target signal processing module, and the signal input terminal of the first feedback switch 107 can be connected to the signal output terminal of the first amplifier 101. In this example, the signal input terminal of the first feedback switch 107 is connected to the signal output terminal of the second amplifier 102.

[0037] In this embodiment, the adaptive feedback module includes a comparator circuit. The first input terminal of the comparator circuit is connected to the signal output terminal of the target signal processing module, and the second input terminal of the comparator circuit is used to input a reference voltage. Users can select a corresponding voltage threshold as the reference voltage according to design requirements. Therefore, when the signal processing line is a signal amplification line, the preset condition for turning off the feedback switch can be that the output signal of the target signal processing module is greater than the first voltage threshold; when the signal processing line is a reduction line, the preset condition for turning off the feedback switch can be that the output signal of the target signal processing module is less than the second voltage threshold.

[0038] Based on the design of the feedback switch and adaptive feedback module described above, the signal processing circuit can automatically turn off the feedback switch, thereby outputting a signal that meets the sampling requirements of the signal acquisition module. The feedback switch can be an electronic switch, such as a MOSFET.

[0039] In this embodiment, to make the signal smoother, for each signal processing module, the signal processing circuit also includes a filtering module connected to the signal output terminal of the signal processing module; wherein, if the filtering module is not located at the end of the signal processing circuit, the signal output terminal of the filtering module is connected to the input terminal of the corresponding feedback switch of the signal processing module.

[0040] For example, such as Figure 5 As shown, in Figure 4 Based on the signal processing circuit shown, a filtering module is set at the signal output terminal of each amplifier, namely the first filtering module 111, the second filtering module 112, and the third filtering module 113; wherein, the first amplifier 101 inputs the signal to the first filtering module 111 for filtering processing, and then inputs it to the second amplifier 102 through the first feedback switch 107.

[0041] After the second amplifier 102 amplifies the signal, it is input to the second filter module 112, so that the second filter module 112 filters the signal and then inputs it to the first feedback module 109 and the third amplifier 103 via the second feedback switch 108.

[0042] In this embodiment, in order to enable the same multi-stage signal processing circuit to adapt to both signal amplification and signal reduction requirements, at least one signal processing line includes a first line and a second line. The first line is used to reduce the signal, and the second line is used to amplify the signal.

[0043] The multi-level signal processing circuit also includes a line selection module, which includes a signal comparison module, a first selection switch, and a second selection switch. The signal comparison module is connected to the control terminals of the first selection switch and the second selection switch, respectively.

[0044] The signal input terminals of the first and second selector switches are each connected to the same signal source. The signal output terminal of the first selector switch is connected to the first line, and the signal output terminal of the second selector switch is connected to the second line.

[0045] The signal comparison module is used to turn on the first selection switch when the voltage of the signal source is greater than the critical threshold, and to turn on the second selection switch when the voltage of the signal source is less than or equal to the critical threshold.

[0046] For example, such as Figure 6 As shown, it includes a first line 114 and a second line 115, wherein the second line 115 can be connected to... Figures 1-5 Any similar route shown. In this example, you can choose... Figure 5 The line in the diagram is used as the second line 115; of course, those skilled in the art can make appropriate adjustments as needed, and this embodiment does not impose specific limitations.

[0047] The first line 114 can also be... Figures 1-5 Any similar circuit shown can be appropriately adjusted by those skilled in the art as needed; this embodiment does not impose specific limitations. In this example, the structure of the first circuit 114 is as follows: Figure 6 As shown, it includes a first reducer, a second reducer, and a third reducer; wherein, a fourth filter module and a third feedback switch are connected sequentially between the first reducer and the second reducer; a fifth filter module and a fourth feedback switch are connected sequentially between the second reducer and the third reducer; the output terminal of the third reducer is connected to the fifth filter module; and the third feedback switch is configured with a third feedback module, and the fourth feedback switch is configured with a fourth feedback module.

[0048] The signal input end of the comparison module 116 in the line selection module is connected with the same signal source as the first selection switch 117 and the second selection switch 118, and the signal comparison module 116 is connected with the control end of the first selection switch 117 and the second selection switch 118 respectively. When the voltage of the signal source is greater than the critical threshold, the signal selection module can turn on the first selection switch 117, so that the first line 114 reduces the signal; when the voltage of the signal source is less than or equal to the critical threshold, the signal selection module can turn on the second selection switch 118, so that the second line 115 amplifies the signal.

[0049] It should be understood that in the optional implementation, the critical threshold is related to the maximum sampling value of the sampling signal. It can be understood that when the voltage of the signal source is greater than the maximum sampling value, the first line 114 is selected, and when the voltage of the signal source is less than or equal to the maximum sampling value, the second line 115 is selected. Thus, the multi-stage signal processing circuit can not only amplify the signal, but also reduce the signal.

[0050] In addition, the embodiment also considers that not all signals are voltage signals and can be directly processed by an amplifier or a reducer. Therefore, the multi-stage signal processing circuit further includes an IV conversion module, which is connected with the signal input end of the first selection switch 117 and the second selection switch 118 as a signal source.

[0051] Based on the above introduction of the multi-stage signal processing circuit, the embodiment further provides an electronic device including the multi-stage signal processing circuit.

[0052] The electronic device can be, but is not limited to, a mobile terminal, a tablet computer, a laptop computer, a medical device, or a built-in device in a motor vehicle, or any combination thereof. In some embodiments, the mobile terminal can include a smart home device, a wearable device, a smart mobile device, a virtual reality device, or an augmented reality device, or any combination thereof. In some embodiments, the smart home device can include a smart lighting device, a control device of a smart electrical appliance, a smart monitoring device, a smart television, a smart camera, or an intercom, or any combination thereof. In some embodiments, the wearable device can include a smart bracelet, a smart shoelace, smart glasses, a smart helmet, a smart watch, smart clothing, a smart backpack, smart accessories, or any combination thereof. In some embodiments, the smart mobile device can include a smart phone, a personal digital assistant (PDA), a game device, a navigation device, or a point of sale (POS) device, or any combination thereof.

[0053] As Figure 7As shown, the electronic device further includes a memory 220, a processor 230, and a communication unit 240, which can be included in the multi-stage signal processing circuit 10.

[0054] The memory 220, the processor 230, and the communication unit 240 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, the elements can be electrically connected to each other through one or more communication buses or signal lines.

[0055] The memory 220 can be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory 220 is configured to store a program, and the processor 230 is configured to execute the program after receiving an execution instruction.

[0056] The communication unit 240 is configured to transceive data through a network. The network can include a wired network, a wireless network, a fiber network, a telecommunication network, an intranet, the Internet, a local area network (LAN), a wide area network (WAN), a wireless local area network (WLAN), a metropolitan area network (MAN), a wide area network (WAN), a public switched telephone network (PSTN), a Bluetooth network, a ZigBee network, or a near field communication (NFC) network, etc., or any combination thereof. In some embodiments, the network can include one or more network access points. For example, the network can include wired or wireless network access points, such as base stations and / or network switching nodes, through which one or more components of the service request processing system can be connected to the network to exchange data and / or information.

[0057] The processor 230 can be an integrated circuit chip with signal processing capability and the processor can include one or more processing cores (e.g., a single-core processor or a multi-core processor). By way of example, the processor can include a Central Processing Unit (CPU), an Application-Specific Integrated Circuit (ASIC), an Application-Specific Instruction-set Processor (ASIP), a Graphics Processing Unit (GPU), a Physics Processing Unit (PPU), a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), a Programmable Logic Device (PLD), a controller, a microcontroller unit, a Reduced Instruction Set Computing (RISC), or a microprocessor, or any combination thereof.

[0058] It should be noted that like reference numerals and letters refer to like items throughout the attached drawings, and once an item is defined in one drawing, it should not require further defining and interpreting in the subsequent drawings.

[0059] In the description of the present application, the terms "first", "second", "third", etc. are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance. In addition, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0060] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0061] The above is only various embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-stage signal processing circuit, characterized by, The multi-stage signal processing circuit comprises at least one signal processing line; For each signal processing line, the signal processing line comprises a plurality of signal processing modules in a preset connection relationship, wherein each signal processing module is configured to amplify an input signal, or each signal processing module is configured to reduce an input signal; The signal output end of each signal processing module is further configured to be connected with a signal acquisition module, so that the signal acquisition module can acquire an output signal processed by each signal processing module; The preset connection relationship is that the plurality of signal processing modules are connected in series, and the signal processing line further comprises a feedback switch between adjacent signal processing modules; For each feedback switch, the signal processing line further comprises an adaptive feedback module configured for the feedback switch; The signal input end of the adaptive feedback module is connected with the signal input end of a target signal processing module, and the signal output end of the adaptive feedback module is connected with the control end of the corresponding feedback switch, wherein the target signal processing module is the previous signal processing module or the next signal processing module connected with the feedback switch; The adaptive feedback module is configured to disconnect the feedback switch when the output signal of the target signal processing module meets a preset condition.

2. The multi-stage signal processing circuit of claim 1, wherein, For each signal processing module, the signal processing line further comprises a delay module connected with the signal output end of the signal processing module; If the delay module is not located at the end of the signal processing line, the first output end of the delay module is connected with the input end of the next signal processing module adjacent to the signal processing module; The second output end of all delay modules is configured to be connected with a same sampling channel of the signal acquisition module; The delay module is configured to transmit the output signal of the signal processing module to the sampling channel during a delay period, and transmit the output signal of the signal processing module to the next signal processing module adjacent to the signal processing module after the delay period.

3. The multi-stage signal processing circuit of claim 1, wherein, The adaptive feedback module comprises a comparison circuit, the first input end of the comparison circuit is connected with the signal output end of the target signal processing module, and the second input end of the comparison circuit is configured to input a reference voltage.

4. The multi-stage signal processing circuit of claim 1, wherein, The preset condition is that the output signal of the target signal processing module is greater than a first voltage threshold or less than a second voltage threshold.

5. The multi-stage signal processing circuit of claim 1, wherein, For each signal processing module, the signal processing line further comprises a filter module connected with the signal output end of the signal processing module; If the filter module is not located at the end of the signal processing line, the signal output end of the filter module is connected with the input end of the feedback switch corresponding to the signal processing module.

6. The multi-stage signal processing circuit of claim 1, wherein, The at least one signal processing line comprises a first line and a second line, the first line is configured to reduce a signal, and the second line is configured to amplify a signal; The multi-stage signal processing circuit further comprises a line selection module, the line selection module comprises a signal comparison module, a first selection switch and a second selection switch, the signal comparison module is connected with the control end of the first selection switch and the second selection switch respectively; The signal input end of the first selection switch and the second selection switch is connected with the same signal source, the signal output end of the first selection switch is connected with the first line, and the signal output end of the second selection switch is connected with the second line; The signal comparison module is used for turning on the first selection switch when the voltage of the signal source is greater than a critical threshold, and turning on the second selection switch when the voltage of the signal source is less than or equal to the critical threshold.

7. The multi-stage signal processing circuit of claim 6, wherein, The multi-stage signal processing circuit further comprises an IV conversion module, the IV conversion module is connected with the signal input end of the signal source, the first selection switch and the second selection switch respectively.

8. An electronic device, comprising: The electronic device comprises the multi-stage signal processing circuit according to any one of claims 1-7.

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