CN213875921U - Triode amplification signal distortion generation analysis device - Google Patents
Triode amplification signal distortion generation analysis device Download PDFInfo
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- CN213875921U CN213875921U CN202022821792.2U CN202022821792U CN213875921U CN 213875921 U CN213875921 U CN 213875921U CN 202022821792 U CN202022821792 U CN 202022821792U CN 213875921 U CN213875921 U CN 213875921U
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Abstract
The utility model provides a triode amplifies signal distortion and produces analytical equipment. The method comprises the following steps: the system comprises a signal generation module, a pre-amplification module, a distortion-free signal generation module, a top distortion signal generation module, a bottom distortion signal generation module, a two-way distortion signal generation module, a cross-over distortion signal generation module, an analog switch module, a signal conditioning and isolating module, an A/D conversion module, a high-pass filter, a distortion degree measurement module, a system control module and an LCD display module; the method comprises the steps that an undistorted signal and various distorted signals are generated through an undistorted signal generating module, a top distorted signal generating module, a bottom distorted signal generating module, a two-way distorted signal generating module and a cross-over distorted signal generating module, a digital signal of a sine wave signal to be measured is measured through an A/D conversion module, and a harmonic effective value of the sine wave signal to be measured is measured through a distortion degree measuring module. The utility model discloses can accurately produce distortion signal and analysis distortion signal, the system wholeness can be stable.
Description
Technical Field
The utility model belongs to electron laboratory glassware field especially relates to a triode amplifies signal distortion and produces analytical equipment.
Background
The triode is a semiconductor device for controlling current, which is called a semiconductor triode, also called a bipolar transistor and a transistor. The function is to amplify the weak signal into an electric signal with larger amplitude value, and the electric signal is also used as a contactless switch. The triode is one of semiconductor basic components, has the function of current amplification and is a core element of an electronic circuit.
And the definition of the electronic laboratory instrument is as follows: the advanced technology in the aspects of programmable devices, electronic circuits, programming and the like is integrated. In the teaching experiment process, the distortion condition of the triode is often required to be analyzed so as to set the static working point of the triode. The distortion of the triode is divided into top distortion, bottom distortion, bidirectional distortion and crossover distortion, and in an integrated circuit, when the static operating point of the triode is set unreasonably or the amplification factor is unreasonable, the distortion waveforms are formed respectively. However, for teaching tasks, no special triode amplified signal distortion generation analysis device is available on the market, and great inconvenience is brought to teaching research.
At present, a triode amplified signal distortion generation and analysis device which has low cost and simple circuit and can accurately generate a distortion signal and analyze the distortion signal is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to prior art exist not enough, the utility model provides a reliable effectual, simple structure, triode amplify signal distortion and produce analytical equipment, can produce the signal of four kinds of distortion types of top distortion, bottom distortion, two-way distortion and crossover distortion respectively. The method can measure the period information of the input signal and the distortion degree of the sinusoidal signal, and has the advantages of low cost, simple operation, stable overall performance of the system and friendly man-machine interaction.
The above technical problem of the present invention can be solved by the following technical solutions:
a kind of triode amplifies the signal distortion and produces the analytical equipment, characterized by that, comprising:
the system comprises a signal generation module, a pre-amplification module, a distortion-free signal generation module, a top distortion signal generation module, a bottom distortion signal generation module, a two-way distortion signal generation module, a cross-over distortion signal generation module, an analog switch module, a signal conditioning and isolating module, an A/D conversion module, a high-pass filter, a distortion degree measurement module, a system control module and an LCD display module;
the signal generating module is connected with the pre-amplifying module; the pre-amplification module is respectively connected with the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module through leads; the output of the undistorted signal generating module is connected with the cross-over distorted signal generating module; the outputs of the undistorted signal generating module, the top distorted signal generating module, the bottom distorted signal generating module, the two-way distorted signal generating module and the cross-over distorted signal generating module are respectively connected to five input ends of the analog switch module; the analog switch module is sequentially connected with the signal conditioning and isolating module, the A/D conversion module and the system control module in series in a wired mode; the signal conditioning and isolating module, the high-pass filter, the distortion measuring module and the system control module are sequentially connected in series in a wired mode; the system control module is connected with the LCD display module in a wired mode.
Preferably, the signal generating module is configured to generate a sine wave signal and output the sine wave signal to the pre-amplifying module.
Preferably, the pre-amplification module is configured to input a sine wave signal, perform pre-amplification on the input sine wave signal to obtain an amplified sine wave signal, and output the amplified sine wave signal to the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module, and the bidirectional distorted signal generation module, respectively.
Preferably, the distortion-free signal generating module is configured to further amplify the amplified sine wave signal to generate a distortion-free sine wave signal, and output the distortion-free sine wave signal to the crossover distortion signal generating module and the analog switch module;
preferably, the top distortion signal generation module is configured to further amplify the amplified sine wave signal to generate a top distorted sine wave signal, and output the top distorted sine wave signal to the analog switch module;
preferably, the bottom distortion signal generation module is configured to further amplify the amplified sine wave signal to generate a bottom distorted sine wave signal, and output the bottom distorted sine wave signal to the analog switch module;
preferably, the bidirectional distortion signal generation module is configured to further amplify the amplified sine wave signal to generate a bidirectional distorted sine wave signal, and output the bidirectional distorted sine wave signal to the analog switch module;
preferably, the bidirectional crossover distortion signal generation module is configured to perform power amplification on the undistorted sinusoidal signal to generate a crossover-distorted sinusoidal signal, and output the crossover-distorted sinusoidal signal to the analog switch module;
preferably, the analog switch module selects one of an undistorted sine wave signal, a top distorted sine wave signal, a bottom distorted sine wave signal, a bidirectional distorted sine wave signal and a cross-over distorted sine wave signal as a to-be-detected sine wave signal according to a control signal of the system control module, and outputs the to-be-detected sine wave signal to the signal conditioning and isolating module;
preferably, the signal conditioning and isolating module matches and isolates the analog switch module, the a/D conversion module and the high-pass filter with each other, and outputs the matched sine wave signal to the a/D conversion module and the high-pass filter respectively.
Preferably, the a/D conversion module is configured to convert the matched sine wave signal into a digitized sine wave signal, and output the digitized sine wave signal to the system control module, and the system control module displays the digitized sine wave signal through the LCD display module;
preferably, the high-pass filter filters the fundamental frequency signal of the matched sine wave signal to obtain a sine wave harmonic signal, and the sine wave harmonic signal is transmitted to the distortion measurement module to measure the effective value of the sine wave harmonic signal.
Preferably, the distortion measurement module measures the effective value of the sine wave harmonic signal by using an AD637, transmits the effective value of the sine wave harmonic signal to the system control module, and the system control module displays the effective value of the sine wave harmonic signal through the LCD display module;
the utility model discloses can accurately produce distortion signal and analysis distortion signal, the system wholeness can be stable.
Drawings
FIG. 1: is the integral block diagram of the system of the utility model;
FIG. 2: is a program flow chart of the triode distortion generation analysis device of the utility model;
FIG. 3: is a pre-amplification module diagram of the utility model;
FIG. 4: is a module diagram for generating undistorted signals of the utility model;
FIG. 5: is a module diagram of the top distortion signal generation of the utility model;
FIG. 6: is a bottom distortion signal generation block diagram of the utility model;
FIG. 7: is a module diagram for generating bidirectional distortion signals of the utility model;
FIG. 8: is the cross-over distortion signal generation block diagram of the utility model;
FIG. 9: is a module diagram of the analog switch of the utility model;
FIG. 10: is a signal conditioning and isolating modular diagram of the utility model;
FIG. 11: is the circuit diagram of the A/D conversion module of the utility model;
FIG. 12: is the circuit diagram of the high-pass filter of the utility model;
FIG. 13: is a circuit diagram of a distortion measurement module of the utility model;
Detailed Description
To facilitate understanding and practice of the invention for those skilled in the art, the following detailed description of the invention is provided in connection with the accompanying drawings and the embodiments, it being understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
Please refer to fig. 1, which is a block diagram of the whole system of the present invention, including a device for generating and analyzing distortion of the signal amplified by the triode, comprising:
the system comprises a signal generation module, a pre-amplification module, a distortion-free signal generation module, a top distortion signal generation module, a bottom distortion signal generation module, a two-way distortion signal generation module, a cross-over distortion signal generation module, an analog switch module, a signal conditioning and isolating module, an A/D conversion module, a high-pass filter, a distortion degree measurement module, a system control module and an LCD display module;
the signal generating module is connected with the pre-amplifying module; the pre-amplification module is respectively connected with the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module through leads; the output of the undistorted signal generating module is connected with the cross-over distorted signal generating module; the outputs of the undistorted signal generating module, the top distorted signal generating module, the bottom distorted signal generating module, the two-way distorted signal generating module and the cross-over distorted signal generating module are respectively connected to five input ends of the analog switch module; the analog switch module is sequentially connected with the signal conditioning and isolating module, the A/D conversion module and the system control module in series in a wired mode; the signal conditioning and isolating module, the high-pass filter, the distortion measuring module and the system control module are sequentially connected in series in a wired mode; the system control module is connected with the LCD display module in a wired mode.
The signal generation module is a Tack AWG5200 model, is used for generating sine wave signals of 1KHz and 20mV, and outputs the sine wave signals to the pre-amplification module.
The pre-amplification module adopts an MMBT3904 triode, is used for pre-amplifying an input signal to obtain an amplified sine wave signal, enables the amplitude of the signal to be within a certain range, and outputs the amplified sine wave signal to the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module.
The distortion-free signal generation module adopts an MMBT3904 triode and is used for further amplifying the amplified sine wave signal transmitted by the pre-amplification module to generate a distortion-free sine wave signal and outputting the distortion-free sine wave signal to the cross-over distortion signal generation module and the analog switch module;
the top distortion signal generation module adopts an MMBT3904 triode and is used for further amplifying the amplified sine wave signal transmitted by the pre-amplification module to generate a top distorted sine wave signal and outputting the top distorted sine wave signal to the analog switch module;
the bottom distortion signal generation module adopts an MMBT3904 triode and is used for further amplifying the amplified sine wave signal transmitted by the pre-amplification module to generate a sine wave signal with bottom distortion and outputting the sine wave signal to the analog switch module;
the bidirectional distortion signal generation module selects an MMBT3904 triode and is used for further amplifying the amplified sine wave signal transmitted by the pre-amplification module to generate a bidirectional distortion sine wave signal and outputting the bidirectional distortion sine wave signal to the analog switch module;
the bidirectional cross-over distortion signal generation module selects an MMBT3904 triode and an MMBT3906 triode, is used for performing power amplification on the undistorted sinusoidal signal transmitted by the undistorted signal generation module to generate a cross-over distorted sinusoidal signal, and outputs the cross-over distorted sinusoidal signal to the analog switch module;
the analog switch module is selected from a CD4051 type, receives an undistorted sine wave signal from the undistorted signal generating module, a top distorted sine wave signal from the top distorted signal generating module, a bottom distorted sine wave signal from the bottom distorted signal generating module, a bidirectional distorted sine wave signal from the bidirectional distorted signal generating module, and a cross-distorted sine wave signal from the cross-over distorted signal generating module, and receives a control signal from the system control module, so that a sine wave signal to be detected is obtained and output to the signal conditioning module;
the signal conditioning and isolating module is an opa690 high-speed precise operational amplifier, the analog switch module is matched with the subsequent A/D conversion module and the subsequent distortion measuring module to play a role in front-stage and rear-stage isolation, and the matched sine wave signals are respectively output to the A/D conversion module and the high-pass filter.
The A/D conversion module is selected as ADS805 and used for converting the matched distorted sine waves output by the signal conditioning and isolating module into digitized distorted sine waves and outputting the digitized distorted sine waves to the system control module for processing and analysis by the system control module.
The high-pass filter is selected as an opa227 high-speed precise operational amplifier and is used for filtering the matched distorted sine wave output by the signal conditioning and isolating module to remove the fundamental frequency signal to obtain the harmonic signal of the distorted sine wave, and transmitting the harmonic signal to the distortion degree measuring module to measure the effective value of the harmonic signal.
The distortion degree measuring module is AD637 for measuring the effective value of the harmonic wave of the distortion waveform and calculating the distortion degree of the signal by the system control module.
The system control module adopts an Intel third-generation FPGA and is used for controlling the analog switch module and reading waveform information, waveform and effective value information of harmonic waves of the distorted waveform signal.
The LCD display module is an OLED liquid crystal display screen with the model selection of 0.96 inch and is used for displaying a oscillogram of a distortion signal and an effective value of harmonic waves.
The following describes the embodiments of the present invention with reference to fig. 1 to 13:
the signal generation module is used for generating a sine wave signal with a peak value of 20mV and outputting the sine wave signal to the pre-amplification module.
The pre-amplification module is used for inputting sine wave signals, carrying out pre-amplification to obtain amplified sine wave signals, and respectively outputting the amplified sine wave signals to the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module.
The undistorted signal generation module is used for further amplifying the amplified sine wave signal to generate an undistorted sine wave signal and outputting the undistorted sine wave signal to the crossover distortion signal generation module and the analog switch module;
the top distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a top distorted sine wave signal and outputting the top distorted sine wave signal to the analog switch module;
the bottom distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a sine wave signal with bottom distortion, and outputting the sine wave signal to the analog switch module;
the bidirectional distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a bidirectional distorted sine wave signal and outputting the bidirectional distorted sine wave signal to the analog switch module;
the bidirectional crossover distortion signal generation module is used for amplifying the power of the undistorted sine signal to generate a crossover distorted sine wave signal and outputting the crossover distorted sine wave signal to the analog switch module;
the analog switch module selects one of an undistorted sine wave signal, a top distorted sine wave signal, a bottom distorted sine wave signal, a bidirectional distorted sine wave signal and a cross-over distorted sine wave signal as a sine wave signal to be detected according to a control signal of the system control module, and outputs the sine wave signal to be detected to the signal conditioning isolation module;
the signal conditioning and isolating module matches and isolates the analog switch module, the A/D conversion module and the high-pass filter, and outputs the matched sine wave signals to the A/D conversion module and the high-pass filter respectively.
The A/D conversion module is used for converting the matched sine wave signals into digital sine wave signals and outputting the digital sine wave signals to the system control module, and the system control module displays the digital sine wave signals through the LCD display module;
the high-pass filter filters the matched sine wave signals to remove fundamental frequency signals to obtain sine wave harmonic signals, and the sine wave harmonic signals are transmitted to the distortion degree measuring module to measure the effective value of the sine wave harmonic signals.
The distortion measurement module measures the effective value of the sine wave harmonic signal by using AD637, transmits the effective value of the sine wave harmonic signal to the system control module, and the system control module displays the effective value of the sine wave harmonic signal through the LCD display module;
the LCD display module is an OLED liquid crystal display screen with the model selection of 0.96 inch.
Although the present specification uses terms such as signal generation module, pre-amplification module, distortion-free signal generation module, top distortion signal generation module, bottom distortion signal generation module, bidirectional distortion signal generation module, cross-over distortion signal generation module, analog switch module, signal conditioning isolation module, a/D conversion module, high pass filter, distortion measurement module, system control module, LCD display module, etc., more terms are used, it does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe the nature of the invention and should not be construed as imposing any additional limitations thereon which would depart from the spirit of the invention.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
It should be understood that the above description of the preferred embodiments is given in some detail, and not as a limitation to the scope of the invention, and that various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A kind of triode amplifies the signal distortion and produces the analytical equipment, characterized by that, comprising:
the system comprises a signal generation module, a pre-amplification module, a distortion-free signal generation module, a top distortion signal generation module, a bottom distortion signal generation module, a two-way distortion signal generation module, a cross-over distortion signal generation module, an analog switch module, a signal conditioning and isolating module, an A/D conversion module, a high-pass filter, a distortion degree measurement module, a system control module and an LCD display module;
the signal generating module is connected with the pre-amplifying module; the pre-amplification module is respectively connected with the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module through leads; the output of the undistorted signal generating module is connected with the cross-over distorted signal generating module; the outputs of the undistorted signal generating module, the top distorted signal generating module, the bottom distorted signal generating module, the two-way distorted signal generating module and the cross-over distorted signal generating module are respectively connected to five input ends of the analog switch module; the analog switch module is sequentially connected with the signal conditioning and isolating module, the A/D conversion module and the system control module in series in a wired mode; the signal conditioning and isolating module, the high-pass filter, the distortion measuring module and the system control module are sequentially connected in series in a wired mode; the system control module is connected with the LCD display module in a wired mode.
2. The apparatus of claim 1, wherein the signal distortion generating and analyzing device comprises:
the signal generating module is used for generating a sine wave signal and outputting the sine wave signal to the pre-amplifying module;
the pre-amplification module is used for inputting sine wave signals, carrying out pre-amplification to obtain amplified sine wave signals, and respectively outputting the amplified sine wave signals to the undistorted signal generation module, the top distorted signal generation module, the bottom distorted signal generation module and the bidirectional distorted signal generation module.
3. The apparatus of claim 1, wherein the signal distortion generating and analyzing device comprises:
the undistorted signal generation module is used for further amplifying the amplified sine wave signal to generate an undistorted sine wave signal and outputting the undistorted sine wave signal to the crossover distortion signal generation module and the analog switch module;
the top distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a top distorted sine wave signal and outputting the top distorted sine wave signal to the analog switch module;
the bottom distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a sine wave signal with bottom distortion, and outputting the sine wave signal to the analog switch module;
the bidirectional distortion signal generation module is used for further amplifying the amplified sine wave signal to generate a bidirectional distorted sine wave signal and outputting the bidirectional distorted sine wave signal to the analog switch module;
the cross-over distortion signal generation module is used for carrying out power amplification on the undistorted sine signal to generate a cross-over distorted sine wave signal and outputting the cross-over distorted sine wave signal to the analog switch module.
4. The apparatus of claim 1, wherein the signal distortion generating and analyzing device comprises:
the analog switch module selects one of an undistorted sine wave signal, a top distorted sine wave signal, a bottom distorted sine wave signal, a bidirectional distorted sine wave signal and a cross-over distorted sine wave signal as a sine wave signal to be detected according to a control signal of the system control module, and outputs the sine wave signal to be detected to the signal conditioning isolation module.
5. The apparatus of claim 1, wherein the signal distortion generating and analyzing device comprises:
the signal conditioning and isolating module matches and isolates the analog switch module, the A/D conversion module and the high-pass filter, and outputs the matched sine wave signals to the A/D conversion module and the high-pass filter respectively;
the A/D conversion module is used for converting the matched sine wave signals into digital sine wave signals and outputting the digital sine wave signals to the system control module, and the system control module displays the digital sine wave signals through the LCD display module.
6. The apparatus of claim 1, wherein the signal distortion generating and analyzing device comprises:
the high-pass filter filters the matched sine wave signals to remove fundamental frequency signals to obtain sine wave harmonic signals, and the sine wave harmonic signals are transmitted to the distortion measurement module to measure the effective values of the sine wave harmonic signals;
the distortion measurement module measures the effective value of the sine wave harmonic signal by using the AD637, transmits the effective value of the sine wave harmonic signal to the system control module, and the system control module displays the effective value of the sine wave harmonic signal through the LCD display module.
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