CN220067675U - Sound amplifying circuit experimental device - Google Patents
Sound amplifying circuit experimental device Download PDFInfo
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- CN220067675U CN220067675U CN202321623169.3U CN202321623169U CN220067675U CN 220067675 U CN220067675 U CN 220067675U CN 202321623169 U CN202321623169 U CN 202321623169U CN 220067675 U CN220067675 U CN 220067675U
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Abstract
The utility model discloses an experimental device of a sound amplifying circuit, which relates to the technical field of sound amplifying circuits, and comprises an audio input module, a first-stage amplifying module and a second-stage amplifying module, wherein the audio input module is used for receiving audio signals and sequentially amplifying the signals by the first-stage amplifying module and the second-stage amplifying module; the output module is used for transmitting the signals to the oscilloscope; the state detection module is used for detecting the isolation waveform state of the audio input module, the first-stage amplification module and the second-stage amplification module and controlling the state judgment module to carry out fault judgment and fault display. The sound amplifying circuit experimental device receives the audio signal by the audio input module and performs signal amplifying processing by matching with the first-stage amplifying module and the second-stage amplifying module, meanwhile, the state detection module detects the waveform states of the audio input module, the first-stage amplifying module and the second-stage amplifying module, and the matching state judging module judges whether the first-stage amplifying module and the second-stage amplifying module have waveform faults or not and performs fault display.
Description
Technical Field
The utility model relates to the technical field of sound amplifying circuits, in particular to a sound amplifying circuit experimental device.
Background
The sound amplifying circuit experimental device simulates the normal working state of the sound amplifying circuit by a related instrument, detects the amplifying precision of the sound amplifying circuit, and performs reproduction verification on the amplifying gain of the sound amplifying circuit so as to know the working characteristic of the sound amplifying circuit.
Disclosure of Invention
The embodiment of the utility model provides an experimental device for a sound amplifying circuit, which aims to solve the problems in the background technology.
According to an embodiment of the present utility model, there is provided an experimental apparatus for a sound amplifying circuit, including: the device comprises a power supply module, an audio input module, a first-stage amplifying module, a second-stage amplifying module, an output module, a state detection module and a state judgment module;
the power supply module is used for providing direct-current electric energy;
the audio input module is connected with the power supply module and is used for receiving the electric energy provided by the power supply module and receiving an audio signal through an audio input port;
the first-stage amplifying module is connected with the power supply module and the audio input module and is used for carrying out first-stage amplifying processing on the input audio signals and outputting first amplified signals;
the second-stage amplifying module is connected with the first-stage amplifying module and is used for carrying out second-stage amplifying processing on the first amplified signal and outputting a second amplified signal;
the output module is connected with the second-stage amplifying module and is used for transmitting the received second amplified signal to an oscilloscope;
the state detection module is connected with the audio input module, the first-stage amplification module and the second-stage amplification module, and is used for carrying out isolation detection on the audio signal and outputting a first detection signal, carrying out isolation detection on the first amplification signal and outputting a second detection signal, and carrying out isolation detection on the second amplification signal and outputting a third detection signal;
the state judging module is connected with the state detecting module and is used for carrying out fault judgment on the first detection signal and the second detection signal through the first state judging circuit and carrying out first-stage amplification fault display, and is used for carrying out fault judgment on the first detection signal and the third detection signal through the second state judging circuit and carrying out second-stage amplification fault display.
Compared with the prior art, the utility model has the beneficial effects that: the sound amplifying circuit experimental device provided by the utility model has the advantages that the audio input module receives the audio signals, the first-stage amplifying module and the second-stage amplifying module amplify the received audio signals, the state detection module detects the waveform states of the audio input module, the first-stage amplifying module and the second-stage amplifying module, and the state judgment module is matched to judge whether the waveform faults occur in the first-stage amplifying module and the second-stage amplifying module, so that the automatic detection of the amplifying states can be realized, and the detection means is simple and effective and can effectively reduce the manual detection workload.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of an experimental apparatus for a sound amplifying circuit according to an embodiment of the present utility model.
Fig. 2 is a circuit diagram of an experimental device for a sound amplifying circuit according to an embodiment of the present utility model.
Fig. 3 is a connection circuit diagram of a status judging module provided by the embodiment of the utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In one embodiment, referring to fig. 1, an experimental apparatus for a sound amplifying circuit includes: the device comprises a power supply module 1, an audio input module 2, a first-stage amplification module 3, a second-stage amplification module 4, an output module 5, a state detection module 6 and a state judgment module 7;
specifically, the power module 1 is configured to provide dc power;
the audio input module 2 is connected with the power supply module 1 and is used for receiving the electric energy provided by the power supply module 1 and receiving an audio signal through an audio input port;
the first-stage amplifying module 3 is connected with the power supply module 1 and the audio input module 2 and is used for carrying out first-stage amplifying processing on the input audio signals and outputting first amplified signals;
the second-stage amplifying module 4 is connected with the first-stage amplifying module and is used for carrying out second-stage amplifying processing on the first amplified signal and outputting a second amplified signal;
the output module 5 is connected with the second-stage amplifying module 4 and is used for transmitting the received second amplified signal to an oscilloscope;
the state detection module 6 is connected with the audio input module 2, the first-stage amplification module 3 and the second-stage amplification module 4, and is used for carrying out isolation detection on the audio signal and outputting a first detection signal, carrying out isolation detection on the first amplification signal and outputting a second detection signal, and carrying out isolation detection on the second amplification signal and outputting a third detection signal;
the state judging module 7 is connected with the state detecting module 6, and is used for carrying out fault judgment on the first detection signal and the second detection signal through a first state judging circuit and carrying out first-stage amplification fault display, and is used for carrying out fault judgment on the first detection signal and the third detection signal through a second state judging circuit and carrying out second-stage amplification fault display.
In a specific embodiment, the power module 1 may use a power circuit to provide dc power; the audio input module 2 may employ an audio receiving circuit for receiving an audio signal; the first-stage amplifying module 3 can adopt a first-stage amplifying circuit formed by operational amplifying circuits to perform first-stage amplifying treatment on an input audio signal; the second-stage amplifying module 4 may use a second-stage amplifying circuit formed by operational amplifying circuits to perform a second-stage amplifying process on the input audio signal; the output module 5 can adopt an audio output circuit to transmit signals to an oscilloscope for waveform display; the state detection module 6 may adopt a first isolation detection circuit, a second isolation detection circuit and a third isolation detection circuit, which are respectively used for detecting waveform conditions of signals output by the audio input module 2, the first stage amplification module 3 and the second stage amplification module 4; the above-mentioned state judgment module 7 may employ a first state judgment circuit for judging the fault condition of the first stage amplification module 3 and a second state judgment circuit for judging the fault condition of the second stage amplification module 4.
In another embodiment, referring to fig. 1, 2 and 3, the power module 1 includes a power supply and a first capacitor C1; the audio input module 2 comprises an audio input port and a second capacitor C2;
specifically, the first end of the power supply is connected with the first end of the first capacitor C1 and the power end of the audio input port, the second end of the first capacitor C1, the second end of the power supply and the ground end of the audio input port are all grounded, the output end of the audio input port is connected with the first end of the second capacitor C2, and the second end of the second capacitor C2 is connected with the first-stage amplifying module 3.
In a specific embodiment, the audio input port and the second capacitor C2 form an audio receiving circuit, and the audio input port receives the relevant audio signal and the second capacitor C2 transmits the relevant audio signal.
Further, the first-stage amplifying module 3 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a third capacitor C3, and a first operational amplifier OP1;
specifically, the first end of the first resistor R1 is connected to the first end of the power supply, one end of the third resistor R3 is connected to the second end of the second capacitor C2, the other end of the third resistor R3 is connected to the inverting end of the first OP-amp OP1 and is connected to the output end of the first OP-amp OP1 and the second-stage amplifying module 4 through the fourth resistor R4, the second end of the first resistor R1 is connected to the first end of the second capacitor C2, the first end of the third capacitor C3 and the in-phase end of the first OP-amp OP1, and the second end of the third capacitor C3 and the second end of the second resistor R2 are grounded.
In a specific embodiment, the first operational amplifier OP1 is selected from, but not limited to, an OP07 operational amplifier, and is combined with a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a third capacitor C3 to form a first stage amplifying circuit.
Further, the second-stage amplifying module 4 includes a twelfth resistor R12, a fourth resistor R4, a seventh resistor R7, and a second operational amplifier OP2; the output module 5 comprises a fifth capacitor C5 and an audio output port;
specifically, one end of the twelfth resistor R12 is connected to the output end of the first operational amplifier OP1 through the fourth capacitor C4, the other end of the twelfth resistor R12 is connected to the inverting end of the second operational amplifier OP2 and is connected to the output end of the second operational amplifier OP2 and the first end of the fifth capacitor C5 through the seventh resistor R7, the second end of the fifth capacitor C5 is connected to the audio output port, and the non-inverting end of the second operational amplifier OP2 is connected to the first end of the third capacitor C3.
In a specific embodiment, the second operational amplifier OP2 is optionally, but not limited to an OP07 operational amplifier, and is combined with a fourth capacitor C4, a twelfth resistor R12, and a seventh resistor R7 to form a second stage amplifying circuit; the fifth capacitor C5 and the audio output port form an audio output circuit, and the audio output port is connected with the oscilloscope and is used for displaying waveforms.
Further, the state detection module 6 includes a first diode D1, a first optocoupler J1, a first power supply VCC1, a fourteenth resistor R14, a second diode D2, a second optocoupler J2, a fifth resistor R5, a second power supply VCC2, a third diode D3, a third optocoupler J3, a sixth resistor R6, and a third power supply VCC3;
specifically, the anode of the first diode D1 is connected to the second end of the second capacitor C2, the cathode of the first diode D1 is connected to the first end of the first optocoupler J1, the second end of the second optocoupler J2 and the second end of the third optocoupler J3 are all grounded, the third end of the first optocoupler J1 is connected to the first power VCC1, the fourth end of the first optocoupler J1 is connected to the state judgment module 7 and grounded through the fourteenth resistor R14, the anode of the second diode D2 and the anode of the third diode D3 are respectively connected to the output end of the first operational amplifier OP1 and the output end of the second operational amplifier OP2, the cathode of the second diode D2 and the cathode of the third diode D3 are respectively connected to the first end of the second optocoupler J2 and the first end of the third optocoupler J3, the third end of the second optocoupler J2 is connected to the state judgment module 7 and connected to the fourth end of the fourth power VCC2 through the fifth resistor R5, and the third end of the third optocoupler J3 is connected to the state judgment module and the fourth end of the third optocoupler J3 is connected to the fourth resistor 3.
In a specific embodiment, the first optocoupler J1, the second optocoupler J2 and the third optocoupler J3 may be PC817 optocouplers, where the first optocoupler J1 cooperates with a first diode D1, a first power supply VCC1 and a fourteenth resistor R14 to form a first isolation detection circuit, the second optocoupler J2 cooperates with a second diode D2, a fifth resistor R5 and a second power supply VCC2 to form a second isolation detection circuit, and the third optocoupler J3 cooperates with a third diode D3, a sixth resistor R6 and a third power supply VCC3 to form a third isolation detection circuit.
Further, the state judging module 7 includes a thirteenth resistor R13, an eighth resistor R8, a ninth resistor R9, a first logic chip U1, a second logic chip U2, a first switching tube VT1, a second switching tube VT2, a tenth resistor R10, an eleventh resistor R11, a first indicator light LED1, a second indicator light LED2, and a fourth power supply VCC4;
specifically, one end of the thirteenth resistor R13, one end of the eighth resistor R8, and one end of the ninth resistor R9 are respectively connected to the fourth end of the first optocoupler J1, the third end of the second optocoupler J2, and the third end of the third optocoupler J3, the other end of the thirteenth resistor R13 is connected to the first input end of the first logic chip U1 and the first input end of the second logic chip U2, the second input end of the first logic chip U1 and the second input end of the second logic chip U2 are respectively connected to the other end of the eighth resistor R8 and the other end of the ninth resistor R9, the output end of the first logic chip U1 and the output end of the second logic chip U2 are respectively connected to the base of the first switch tube VT1 and the base of the second switch tube VT2, the collector of the first switch tube VT1 is connected to the cathode of the first indicator lamp LED1, the anode of the first indicator lamp LED1 is connected to the fourth power supply VCC4 through the tenth resistor R10, the collector of the second switch tube VT2 is connected to the cathode of the second indicator lamp LED2, and the emitter of the fourth indicator lamp VT2 is connected to the emitter of the fourth indicator lamp VT 11 through the first switch tube VT 11.
In a specific embodiment, the first logic chip U1 may be a logic chip, and is matched with a thirteenth resistor R13, an eighth resistor R8, a first switching tube VT1, a first indicator LED1, a tenth resistor R10, and a fourth power VCC4 to form a first status judging circuit, where the first switching tube VT1 may be an NPN triode; the second logic chip U2 may be a logic chip, and is matched with a ninth resistor R9, a second switching tube VT2, a second indicator light LED2, and an eleventh resistor R11 to form a second state judgment circuit.
According to the sound amplifying circuit experimental device, a power supply supplies direct current electric energy, an audio input port receives audio signals, a first operational amplifier OP1 is matched with a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a third capacitor C3 to perform first-stage amplification processing on the received audio signals, a second operational amplifier OP2 is matched with a fourth capacitor C4, a twelfth resistor R12 and a seventh resistor R7 to perform second-stage amplification processing, the processed signals are transmitted to an oscilloscope through an audio output port to perform waveform display, meanwhile, a first optocoupler J1 is isolated to judge the receiving state of the audio signals, a second optocoupler J2 is isolated to judge the waveform state of the signals output by the first operational amplifier OP1, when the audio signals are input, the first optocoupler J1 is conducted at this time, the first input end of a first logic chip U1 and the second input end of the second logic chip U2 are high-level, if the second optocoupler J2 is in the first-level state, the second optocoupler J2 is also controlled to be turned on, and the second logic chip VT2 is controlled to be turned on, and the second LED2 is turned on when the second optocoupler U1 is turned on, and the second logic chip is turned on, and the first LED2 is turned on, and the fault is controlled to be turned on, and the first LED2 is turned on, and the first level is turned on, the first level 1 is a fault is a high, and the first stage and the signal is turned on and the first stage 2 is a high.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. An experimental device for a sound amplifying circuit is characterized in that,
the sound amplification circuit experimental device comprises: the device comprises a power supply module, an audio input module, a first-stage amplifying module, a second-stage amplifying module, an output module, a state detection module and a state judgment module;
the power supply module is used for providing direct-current electric energy;
the audio input module is connected with the power supply module and is used for receiving the electric energy provided by the power supply module and receiving an audio signal through an audio input port;
the first-stage amplifying module is connected with the power supply module and the audio input module and is used for carrying out first-stage amplifying processing on the input audio signals and outputting first amplified signals;
the second-stage amplifying module is connected with the first-stage amplifying module and is used for carrying out second-stage amplifying processing on the first amplified signal and outputting a second amplified signal;
the output module is connected with the second-stage amplifying module and is used for transmitting the received second amplified signal to an oscilloscope;
the state detection module is connected with the audio input module, the first-stage amplification module and the second-stage amplification module, and is used for carrying out isolation detection on the audio signal and outputting a first detection signal, carrying out isolation detection on the first amplification signal and outputting a second detection signal, and carrying out isolation detection on the second amplification signal and outputting a third detection signal;
the state judging module is connected with the state detecting module and is used for carrying out fault judgment on the first detection signal and the second detection signal through the first state judging circuit and carrying out first-stage amplification fault display, and is used for carrying out fault judgment on the first detection signal and the third detection signal through the second state judging circuit and carrying out second-stage amplification fault display.
2. The sound amplification circuit experimental apparatus of claim 1, wherein the power supply module comprises a power supply and a first capacitor; the audio input module comprises an audio input port and a second capacitor;
the first end of the power supply is connected with the first end of the first capacitor and the power end of the audio input port, the second end of the first capacitor, the second end of the power supply and the grounding end of the audio input port are grounded, the output end of the audio input port is connected with the first end of the second capacitor, and the second end of the second capacitor is connected with the first-stage amplifying module.
3. The experimental device of claim 2, wherein the first stage amplification module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a third capacitor and a first op-amp;
the first end of the first resistor is connected with the first end of the power supply, one end of the third resistor is connected with the second end of the second capacitor, the other end of the third resistor is connected with the inverting end of the first operational amplifier and is connected with the output end of the first operational amplifier and the second-stage amplifying module through the fourth resistor, the second end of the first resistor is connected with the first end of the second capacitor, the first end of the third capacitor and the in-phase end of the first operational amplifier, and the second end of the third capacitor and the second end of the second resistor are grounded.
4. A sound amplifying circuit experimental device according to claim 3, wherein said second stage amplifying module comprises a fourth capacitor, a twelfth resistor, a seventh resistor, and a second operational amplifier; the output module comprises a fifth capacitor and an audio output port;
one end of the twelfth resistor is connected with the output end of the first operational amplifier through the fourth capacitor, the other end of the twelfth resistor is connected with the inverting end of the second operational amplifier and is connected with the output end of the second operational amplifier and the first end of the fifth capacitor through the seventh resistor, the second end of the fifth capacitor is connected with the audio output port, and the in-phase end of the second operational amplifier is connected with the first end of the third capacitor.
5. The experimental apparatus of claim 4, wherein the state detection module comprises a first diode, a first optocoupler, a first power supply, a fourteenth resistor, a second diode, a second optocoupler, a fifth resistor, a second power supply, a third diode, a third optocoupler, a sixth resistor, and a third power supply;
the anode of the first diode is connected with the second end of the second capacitor, the cathode of the first diode is connected with the first end of the first optocoupler, the second end of the second optocoupler and the second end of the third optocoupler are all grounded, the third end of the first optocoupler is connected with a first power supply, the fourth end of the first optocoupler is connected with the state judgment module and grounded through a fourteenth resistor, the anode of the second diode and the anode of the third diode are respectively connected with the output end of the first operational amplifier and the output end of the second operational amplifier, the cathode of the second diode and the cathode of the third diode are respectively connected with the first end of the second optocoupler and the first end of the third optocoupler, the third end of the second optocoupler is connected with the state judgment module and connected with the second power supply through a fifth resistor, and the third end of the third optocoupler is connected with the third power supply through a sixth resistor.
6. The experimental device of claim 5, wherein said status judging module comprises a thirteenth resistor, an eighth resistor, a ninth resistor, a first logic chip, a second logic chip, a first switching tube, a second switching tube, a tenth resistor, an eleventh resistor, a first indicator light, a second indicator light, and a fourth power supply;
one end of the thirteenth resistor, one end of the eighth resistor and one end of the ninth resistor are respectively connected with the fourth end of the first optical coupler, the third end of the second optical coupler and the third end of the third optical coupler, the other end of the thirteenth resistor is connected with the first input end of the first logic chip and the first input end of the second logic chip, the second input end of the first logic chip and the second input end of the second logic chip are respectively connected with the other end of the eighth resistor and the other end of the ninth resistor, the output end of the first logic chip and the output end of the second logic chip are respectively connected with the base electrode of the first switching tube and the base electrode of the second switching tube, the collector electrode of the first switching tube is connected with the cathode of the first indicator lamp, the anode of the first indicator lamp is connected with the fourth power supply through the tenth resistor, the collector electrode of the second switching tube is connected with the cathode of the second indicator lamp, the anode of the second indicator lamp is connected with the fourth power supply through the eleventh resistor, and the emitter of the first switching tube and the emitter of the second switching tube are grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321623169.3U CN220067675U (en) | 2023-06-26 | 2023-06-26 | Sound amplifying circuit experimental device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321623169.3U CN220067675U (en) | 2023-06-26 | 2023-06-26 | Sound amplifying circuit experimental device |
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| CN220067675U true CN220067675U (en) | 2023-11-21 |
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| CN202321623169.3U Active CN220067675U (en) | 2023-06-26 | 2023-06-26 | Sound amplifying circuit experimental device |
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