Voltage limit switching circuit and sound simulation device

Abstract

The utility model provides a voltage limit switching circuit and a sound simulation device, and relates to the technical field of control circuits, the main technical scheme is that the voltage limit switching circuit comprises a control module, a first amplitude limiting module and a second amplitude limiting module, the input end of the control module is used for being connected with the output end of a pre-stage circuit; the input end of the first amplitude limiting module is connected with the first output end of the control module; the output end of the first amplitude limiting module is used for being connected with the input end of an amplitude limiting circuit; the first input end of the second amplitude limiting module is connected with the first input end of the control module and the input end of the first amplitude limiting module; the second input end of the second amplitude limiting module is connected with the second output end of the control module. An output signal of the pre-stage circuit is controlled by the control module to flow into the amplitude limiting circuit through the first amplitude limiting module or enter the amplitude limiting circuit through the second amplitude limiting circuit and the first amplitude limiting circuit in sequence. Therefore, the limiting amplitude and the limiting frequency of the amplitude limiting circuit are adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, and more specifically, to a voltage limiting switching circuit and an acoustic simulation device. Background Art

[0002] The sound sources that we commonly come into contact with in daily life, such as the voice of a singer output by a microphone, the sound of an electronic tape, etc., are essentially a circuit signal, which may be distorted, thereby causing abnormal sound.

[0003] At present, there are related limiting circuits to handle this signal distortion. However, the limiting amplitude and limiting frequency of the existing limiting circuits are too simple. In actual use, different usage scenarios require different limiting amplitudes and limiting frequencies. The existing limiting circuits have too simple limiting amplitudes and limiting frequencies, which are difficult to meet actual use needs. Utility Model Content

[0004] The utility model aims to provide a pressure-limiting switching circuit and an acoustic simulation device, so as to achieve the purpose of adjusting the limiting amplitude and limiting frequency of the limiting circuit.

[0005] The utility model is realized by the following technical solutions:

[0006] In a first aspect, a voltage limiting switching circuit is provided, comprising: a control module, a first limiting module and a second limiting module, wherein the input end of the control module is used to be connected to the output end of the previous stage circuit; the input end of the first limiting module is connected to the first output end of the control module; the output end of the first limiting module is used to be connected to the input end of the limiting circuit; a second limiting module, wherein the first input end of the second limiting module is connected to both the first input end of the control module and the input end of the first limiting module; and the second input end of the second limiting module is connected to the second output end of the control module.

[0007] Optionally, the control module includes a switch S1A and a resistor R1; pin 1 of the switch S1A and one end of the resistor R1 are both used to connect to the output end of the previous stage circuit; the other end of the resistor R1 is grounded; pin 2 of the switch S1A is connected to the second input end of the second limiting module; pin 3 of the switch S1A is connected to the input end of the first limiting module and the first input end of the second limiting module.

[0008] Optionally, the first limiting module includes capacitor C3, capacitor C4, resistor R6 and resistor R7; one end of capacitor C3 is connected to pin 3 of switch S1A and the first input end of the second limiting module; the other end of capacitor C3 is connected to one end of capacitor C4 and one end of resistor R6; the other end of resistor R6 is grounded; the other end of capacitor C4 is connected to one end of resistor R7; the other end of resistor R7 is used to connect to the input end of the limiting circuit.

[0009] Optionally, the second limiting module includes capacitor C1, capacitor C2, capacitor C5, resistor R2, resistor R3, resistor R4, resistor R5 and switch SB1; one end of the capacitor C2 and one end of the resistor R5 are both connected to pin 2 of switch S1A; the other end of the capacitor C2 and one end of the capacitor C1 are both connected to one end of the resistor R2; the other end of the resistor R2 is connected to pin 4 of switch S1B; the other end of the resistor R2 and pin 5 of switch S1B are both grounded; the other end of the resistor R5 and one end of the resistor R4 are both connected to one end of the capacitor C5; the other end of the capacitor C5 is grounded; the other end of the resistor R4 and the other end of the capacitor C1 are both connected to pin 3 of the switch S1A.

[0010] In a second aspect, an audio simulation device is provided, comprising the voltage-limiting switching circuit described in the first aspect, and further comprising: a front-stage circuit, wherein the output end of the front-stage circuit is connected to the input end of the voltage-limiting switching circuit; a power amplifier circuit, wherein the input end of the power amplifier circuit is connected to the output end of the front-stage circuit; a limiting circuit, wherein the input end of the limiting circuit is connected to both the input end of the power amplifier circuit and the output end of the voltage-limiting switching circuit; the output end of the limiting circuit is connected to the input end of the front-stage circuit; and a speaker, wherein the input end of the speaker is connected to the output end of the power amplifier circuit.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] The control module controls the output signal of the front stage circuit to flow into the limiting circuit through the first limiting module, or to enter the limiting circuit through the second limiting circuit and the first limiting circuit in sequence, so as to achieve the purpose of adjusting the limiting amplitude and limiting frequency of the limiting circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0014] Figure 1An electrical block diagram of a voltage limiting switching circuit in Example 1;

[0015] Figure 2 Schematic diagram of the circuit structure of a voltage limiting switching circuit in Example 1;

[0016] Figure 3 An electrical block diagram of an acoustic simulation device in Example 2.

[0017] Marks and corresponding parts names in the attached drawings:

[0018] 1-control module; 2-first limit module; 3-second limit module;

[0019] 100-pressure limiting switching circuit; 200-pre-stage circuit; 300-power amplifier circuit; 400-limiting circuit; 500-speaker. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0021] Example 1

[0022] The present embodiment provides a voltage-limiting switching circuit, comprising: a control module 1, wherein the input end of the control module 1 is used to be connected to the output end of the pre-stage circuit 200; a first limiting module 2, wherein the input end of the first limiting module 2 is connected to the first output end of the control module 1; the output end of the first limiting module 2 is used to be connected to the input end of the limiting circuit 400; a second limiting module 3, wherein the first input end of the second limiting module 3 is connected to both the first input end of the control module 1 and the input end of the first limiting module 2; and the second input end of the second limiting module 3 is connected to the second output end of the control module 1.

[0023] In this embodiment, the control module 1 includes a switch S1A and a resistor R1; pin 1 of the switch S1A and one end of the resistor R1 are both used to connect to the output end of the front-stage circuit 200; the other end of the resistor R1 is grounded; pin 2 of the switch S1A is connected to the second input end of the second limiting module 3; pin 3 of the switch S1A is connected to the input end of the first limiting module 2 and the first input end of the second limiting module 3.

[0024] In this embodiment, the first limiting module 2 includes a capacitor C3, a capacitor C4, a resistor R6 and a resistor R7; one end of the capacitor C3 is connected to pin 3 of the switch S1A and the first input end of the second limiting module 3; the other end of the capacitor C3 is connected to one end of the capacitor C4 and one end of the resistor R6; the other end of the resistor R6 is grounded; the other end of the capacitor C4 is connected to one end of the resistor R7; the other end of the resistor R7 is used to connect to the input end of the limiting circuit 400.

[0025] In this embodiment, the second limiting module 3 includes a capacitor C1, a capacitor C2, a capacitor C5, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a switch SB1; one end of the capacitor C2 and one end of the resistor R5 are both connected to pin 2 of the switch S1A; the other end of the capacitor C2 and one end of the capacitor C1 are both connected to one end of the resistor R2; the other end of the resistor R2 is connected to pin 4 of the switch S1B; the other end of the resistor R2 and pin 5 of the switch S1B are both grounded; the other end of the resistor R5 and one end of the resistor R4 are both connected to one end of the capacitor C5; the other end of the capacitor C5 is grounded; the other end of the resistor R4 and the other end of the capacitor C1 are both connected to pin 3 of the switch S1A.

[0026] The voltage limiting switching circuit provided in this embodiment has the following working principle:

[0027] Input from the front stage circuit 200 to the resistor R1 and the 1st pin of the switch S1, and then input from the resistor R7 to the voltage limiting circuit. By switching the working state of the switch S1, the direction of the signal is changed to change the size and frequency of the voltage limiting. By changing the capacitors C1-C5, different voltage limiting frequencies are switched. Thus, the size and frequency of the voltage line can be quickly changed.

[0028] Example 2

[0029] The present embodiment provides an acoustic simulation device, comprising the voltage limiting switching circuit 100 described in Embodiment 1, and further comprising: a pre-stage circuit 200, wherein the output end of the pre-stage circuit 200 is connected to the input end of the voltage limiting switching circuit 100; a power amplifier circuit 300, wherein the input end of the power amplifier circuit 300 is connected to the output end of the pre-stage circuit 200; a limiting circuit 400, wherein the input end of the limiting circuit 400 is connected to both the input end of the power amplifier circuit 300 and the output end of the voltage limiting switching circuit 100; the output end of the limiting circuit 400 is connected to the input end of the pre-stage circuit 200; and a speaker 500, wherein the input end of the speaker 500 is connected to the output end of the power amplifier circuit 300.

[0030] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A voltage limiting switching circuit, characterized in that: include: A control module (1), wherein an input end of the control module (1) is used to be connected to an output end of a previous stage circuit (200); A first amplitude limiting module (2), wherein the input end of the first amplitude limiting module (2) is connected to the first output end of the control module (1); and the output end of the first amplitude limiting module (2) is used to be connected to the input end of the amplitude limiting circuit (400); A second amplitude limiting module (3), wherein a first input end of the second amplitude limiting module (3) is connected to both a first input end of the control module (1) and an input end of the first amplitude limiting module (2); and a second input end of the second amplitude limiting module (3) is connected to a second output end of the control module (1).

2. A voltage limiting switching circuit according to claim 1, characterized in that: The control module (1) comprises a switch S1A and a resistor R1; Pin No. 1 of the switch S1A and one end of the resistor R1 are both used to connect to the output end of the previous stage circuit (200); The other end of the resistor R1 is grounded; Pin 2 of the switch S1A is connected to the second input end of the second limiting module (3); Pin No. 3 of the switch S1A is connected to both the input end of the first amplitude limiting module (2) and the first input end of the second amplitude limiting module (3).

3. A voltage limiting switching circuit according to claim 2, characterized in that: The first amplitude limiting module (2) comprises a capacitor C3, a capacitor C4, a resistor R6 and a resistor R7; One end of the capacitor C3 is connected to the pin 3 of the switch S1A and the first input end of the second limiting module (3); The other end of the capacitor C3 is connected to one end of the capacitor C4 and one end of the resistor R6; The other end of the resistor R6 is grounded; The other end of the capacitor C4 is connected to one end of the resistor R7; The other end of the resistor R7 is used to be connected to the input end of the amplitude limiting circuit (400).

4. The voltage limiting switching circuit according to claim 3, characterized in that: The second amplitude limiting module (3) comprises a capacitor C1, a capacitor C2, a capacitor C5, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a switch SB1; One end of the capacitor C2 and one end of the resistor R5 are connected to pin 2 of the switch S1A; The other end of the capacitor C2 and one end of the capacitor C1 are both connected to one end of the resistor R2; The other end of the resistor R2 is connected to pin 4 of the switch S1B; The other end of the resistor R2 and the pin 5 of the switch S1B are both grounded; The other end of the resistor R5 and one end of the resistor R4 are both connected to one end of the capacitor C5; The other end of capacitor C5 is grounded; The other end of the resistor R4 and the other end of the capacitor C1 are both connected to pin 3 of the switch S1A.

5. A sound simulation device, characterized in that: The voltage limiting switching circuit (100) according to any one of claims 1 to 4 further comprises: A front-stage circuit (200), wherein an output end of the front-stage circuit (200) is connected to an input end of the voltage limiting switching circuit (100); A power amplifier circuit (300), wherein an input end of the power amplifier circuit (300) is connected to an output end of the previous stage circuit (200); A limiter circuit (400), wherein the input end of the limiter circuit (400) is connected to the input end of the power amplifier circuit (300) and the output end of the voltage limiting switching circuit (100); and the output end of the limiter circuit (400) is connected to the input end of the pre-stage circuit (200); A speaker (500), wherein an input end of the speaker (500) is connected to an output end of the power amplifier circuit (300).

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