Multi-frequency signal generating device

Abstract

The utility model relates to the technical field of signal generation, and provides a multi-frequency signal generation device, which comprises a processing unit used for receiving and processing a plurality of waveform signals with different frequencies selected by a user; the signal modulation unit is connected with the processing unit and is used for modulating the plurality of waveform signals with different frequencies to obtain pulse width modulation waveform signals with different frequencies; and the multi-frequency signal generation circuit is connected with the signal modulation unit and is used for carrying out parallel processing on the pulse width modulation waveform signals with different frequencies and outputting a plurality of voltage signals with different frequencies. The utility model aims to realize real-time conversion of a plurality of frequency waveform signals and voltage signals according to the requirements of application scenes and solve the problems of slow multi-frequency signal conversion speed and delay.

Description

Technical Field

[0001] The utility model relates to the technical field of signal generation, in particular to a multi-frequency signal generating device. Background Art

[0002] In practical applications, multi-frequency electrical signals can be used to implement frequency division multiplexing, multiplexing, frequency modulation, frequency analysis and other functions, and are widely used in communications, audio processing, wireless sensor networks, medical diagnosis and other fields. Especially in the field of medical diagnosis or rehabilitation, the real-time requirements for multi-frequency signals are high, and there is usually a high delay problem in the conversion and generation process of multi-frequency signals. Utility Model Content

[0003] The utility model provides a multi-frequency signal generating device, which aims to realize real-time conversion of multiple frequency wave signals and voltage signals according to the requirements of application scenarios, and solve the problems of slow conversion speed and delay of multi-frequency signals.

[0004] The present invention provides a multi-frequency signal generating device, comprising:

[0005] A processing unit, used for generating a plurality of waveform signals of different frequencies;

[0006] The signal modulation unit is connected to the processing unit and is used to modulate a plurality of waveform signals of different frequencies to obtain pulse width modulation waveform signals of different frequencies;

[0007] The multi-frequency signal generating circuit is connected to the signal modulation unit and is used for processing pulse width modulation waveform signals of different frequencies in parallel and outputting a plurality of voltage signals of different frequencies.

[0008] In one embodiment, the processing unit is used to receive a plurality of waveform parameters and obtain waveform signals corresponding to different frequencies according to the matching of the waveform parameters.

[0009] In one embodiment, the signal modulation unit includes a digital power amplifier unit and a low-pass filter unit;

[0010] A digital power amplifier unit, used for pulse width modulation and amplification of a plurality of waveform signals of different frequencies, to generate a first group of pulse width modulation waveform signals matching the plurality of waveform signals of different frequencies;

[0011] The low-pass filtering unit is used to filter out high-frequency signals from the first group of pulse width modulation waveform signals to obtain a second group of pulse width modulation waveform signals.

[0012] In one embodiment, the multi-frequency signal generating circuit includes a plurality of digital frequency amplifying units connected in parallel.

[0013] In one embodiment, each digital frequency amplification unit includes: a digital frequency synthesizer and an operational amplifier; the output end of the digital frequency synthesizer is connected to the inverting input end of the operational amplifier, the non-inverting input end of the operational amplifier is grounded, and the output end of the operational amplifier is the output end of the digital frequency amplification unit.

[0014] In one embodiment, the input terminals of the plurality of digital frequency amplifying units connected in parallel are the input terminals of the digital frequency synthesizer.

[0015] In one embodiment, the waveform parameters include frequency, amplitude, phase, period, pulse width, rise time, fall time, peak value, and waveform shape.

[0016] In one embodiment, the waveform signal includes at least one of a sine wave, a square wave or a triangle wave.

[0017] In one embodiment, the device further includes: a user interface, wherein the user interface is used for allowing a user to select waveform parameters.

[0018] The embodiment of the utility model provides a multi-frequency signal generating device, including: a processing unit, used to receive and process a plurality of waveform signals of different frequencies selected by a user; a signal modulation unit connected to the processing unit, used to modulate the waveform signals of the plurality of different frequencies to obtain pulse width modulation waveform signals of different frequencies; a multi-frequency signal generating circuit, connected to the signal modulation unit, used to process the pulse width modulation waveform signals of different frequencies in parallel, and output a plurality of voltage signals of different frequencies. The purpose is to realize the real-time conversion of multiple frequency waveform signals and voltage signals according to the requirements of the application scenario, and solve the problems of slow conversion speed and delay of multi-frequency signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a multi-frequency signal generating device provided in one embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a signal modulation unit provided in one embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a multi-frequency signal generating circuit provided in one embodiment of the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0025] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a multi-frequency signal generating device provided by an embodiment of the present utility model. Figure 1 It can be known that the multi-frequency signal generating device 10 includes: a processing unit 101 , a signal modulation unit 102 and a multi-frequency signal generating circuit 103 .

[0028] The processing unit 101 is used to generate a plurality of waveform signals of different frequencies. The signal modulation unit 102 is connected to the processing unit 101 and is used to modulate the waveform signals of different frequencies to obtain pulse width modulation waveform signals of different frequencies. The multi-frequency signal generating circuit 103 is connected to the signal modulation unit 101 and is used to process the pulse width modulation waveform signals of different frequencies in parallel and output a plurality of voltage signals of different frequencies.

[0029] In one embodiment, the processing unit 101 is used to receive a plurality of waveform parameters and obtain waveform signals corresponding to different frequencies according to the matching of the waveform parameters.

[0030] In one embodiment, the waveform parameters include frequency, amplitude, phase, period, pulse width, rise time, fall time, peak value and waveform shape. The waveform signal includes at least one of a sine wave, a square wave or a triangle wave.

[0031] In one embodiment, the multi-frequency signal generating device 10 further includes: a user interface (not shown in the figure), wherein the user interface is used for allowing the user to select waveform parameters.

[0032] The user can select the waveform parameters corresponding to the desired waveform signal according to the user interface provided by the multi-frequency signal generating device 10. Specifically, the user interface of the multi-frequency signal generating device 10 is pre-set with selection items for the user to select waveform parameters, as well as the corresponding relationship between the waveform signal and the waveform parameter and the function introduction of the waveform signal.

[0033] In one embodiment, if Figure 2 As stated, Figure 2 A schematic diagram of a signal modulation unit provided for an embodiment of the utility model. The signal modulation unit 102 includes a digital power amplifier unit 1021 and a low-pass filter unit 1022. The digital power amplifier unit 1021 is used to perform pulse width modulation and amplification on a plurality of waveform signals of different frequencies to generate a first group of pulse width modulation waveform signals matching the waveform signals of different frequencies; the low-pass filter unit 1022 is used to filter out high-frequency signals from the first group of pulse width modulation waveform signals to obtain a second group of pulse width modulation waveform signals. The signal modulation unit performs pulse width modulation, amplifies, and removes high-frequency components of input waveform signals of different frequencies to obtain a pulse width modulation waveform signal suitable for transmission. The pulse width modulation waveform signal can be understood as a pulse width modulation waveform signal obtained after amplification by an amplifier inside the digital power amplifier unit and modulation by a pulse width modulation circuit, and then the high-frequency components are filtered out by a low-pass filter unit to restore the amplified input signal waveform, and the obtained pulse width modulation waveform signal can drive the multi-frequency signal generation circuit to ensure that the signal can be effectively transmitted.

[0034] In one embodiment, if Figure 3 As shown, Figure 3 Schematic diagram of a multi-frequency signal generating circuit provided by an embodiment of the utility model. Figure 3It can be seen that the multi-frequency signal generating circuit 103 includes a plurality of digital frequency amplifying units 1031 connected in parallel. Each digital frequency amplifying unit 1031 includes: a digital frequency synthesizer 1032 and an operational amplifier 1033; the output end of the digital frequency synthesizer 1032 is connected to the reverse input end of the operational amplifier 1033, the in-phase input end of the operational amplifier 1033 is grounded, and the output end of the operational amplifier 1033 is the output end of the plurality of digital frequency amplifying units 1031 connected in parallel. The input end of the plurality of digital frequency amplifying units 1031 connected in parallel is the input end of the digital frequency synthesizer 1032. Through the plurality of digital frequency amplifying units connected in parallel, digital signal modulation and signal synthesis are synchronously performed on a plurality of pulse width modulation waveform signals of different frequencies, so as to realize real-time conversion of a plurality of frequency waveform signals and voltage signals, and solve the problems of slow conversion speed and delay of multi-frequency signals.

[0035] Specifically, the digital frequency synthesizer 1032 may be a DDS (Direct Digital Synthesizre); and the operational amplifier 1033 may be a 741 operational amplifier.

[0036] The embodiment of the utility model provides a multi-frequency signal generating device, including: a processing unit, used to receive and process a plurality of waveform signals of different frequencies selected by a user; a signal modulation unit connected to the processing unit, used to modulate the waveform signals of the plurality of different frequencies to obtain pulse width modulation waveform signals of different frequencies; a multi-frequency signal generating circuit, connected to the signal modulation unit, used to process the pulse width modulation waveform signals of different frequencies in parallel, and output a plurality of voltage signals of different frequencies. The purpose is to realize the real-time conversion of multiple frequency waveform signals and voltage signals according to the requirements of the application scenario, and solve the problems of slow conversion speed and delay of multi-frequency signals.

[0037] It should be understood that the terms used in the present invention are only for the purpose of describing particular embodiments but are not intended to limit the present invention.

[0038] It should also be understood that the term “and / or” used in the present invention and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A multi-frequency signal generating device, characterized in that: include: A processing unit, used for generating a plurality of waveform signals of different frequencies; The signal modulation unit is connected to the processing unit and is used to modulate the waveform signals of several different frequencies to obtain pulse width modulation waveform signals of different frequencies; The multi-frequency signal generating circuit is connected to the signal modulation unit and is used for processing the pulse width modulation waveform signals of different frequencies in parallel and outputting a plurality of voltage signals of different frequencies.

2. The multi-frequency signal generating device according to claim 1, characterized in that: The processing unit is used to receive a plurality of waveform parameters and obtain waveform signals corresponding to different frequencies according to the matching of the waveform parameters.

3. The multi-frequency signal generating device according to claim 1, characterized in that: The signal modulation unit includes a digital power amplifier unit and a low-pass filter unit; The digital power amplifier unit is used to perform pulse width modulation and amplification on a plurality of waveform signals of different frequencies to generate a first group of pulse width modulation waveform signals matching the waveform signals of the plurality of different frequencies; The low-pass filtering unit is used to filter out high-frequency signals from the first group of pulse width modulation waveform signals to obtain a second group of pulse width modulation waveform signals.

4. The multi-frequency signal generating device according to claim 3, characterized in that: The multi-frequency signal generating circuit comprises a plurality of digital frequency amplifying units connected in parallel with each other.

5. The multi-frequency signal generating device according to claim 4, characterized in that: Each of the digital frequency amplification units includes: a digital frequency synthesizer and an operational amplifier; the output end of the digital frequency synthesizer is connected to the inverting input end of the operational amplifier, the in-phase input end of the operational amplifier is grounded, and the output end of the operational amplifier is the output end of the digital frequency amplification unit.

6. The multi-frequency signal generating device according to claim 5, characterized in that: The input ends of the multiple digital frequency amplifying units connected in parallel are the input ends of the digital frequency synthesizer.

7. The multi-frequency signal generating device according to claim 2, characterized in that: The waveform parameters include frequency, amplitude, phase, period, pulse width, rise time, fall time, peak value and waveform shape.

8. The multi-frequency signal generating device according to claim 7, characterized in that: The waveform signal includes at least one of a sine wave, a square wave or a triangle wave.

9. The multi-frequency signal generating device according to claim 7, characterized in that: The device further includes: a user interface, wherein the user interface is used for allowing a user to select the waveform parameters.

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