A speaker monitoring audio power amplifier circuit

Abstract

This application relates to the field of audio monitoring technology and discloses a speaker monitoring audio power amplifier circuit, including polarized capacitors C66, C131, C138, C115, C116, C67, and C179, resistors R89, R142, R65, R168, R247, R246, R203, and R204, a chip U24, and a connector J8. This application, through a dual-input channel design, provides a solid foundation for subsequent amplification stages, significantly improving the accuracy and clarity of audio monitoring; it ensures the stable operation of the core chip, reducing the risk of audio distortion caused by instability; and the optimized output design filters the amplified signal again, enabling the speaker to more accurately reproduce the audio, providing users with a high-quality monitoring experience. It has high practical value in real-world applications.

Description

Technical Field

[0001] This application relates to the field of audio monitoring technology, and in particular to a speaker monitoring audio power amplifier circuit. Background Technology

[0002] In the field of audio monitoring, speaker monitoring audio power amplifier circuits are crucial. Traditional speaker monitoring audio power amplifier circuits have several problems, specifically:

[0003] 1. The signal input processing stage is simply designed and lacks effective filtering and voltage division measures. For example, the input signal is often subject to external interference, resulting in a lot of signal noise, making it impossible to accurately acquire the original audio signal and seriously affecting the accuracy of monitoring;

[0004] 2. The circuit stability is poor during the power amplification and output stages. The existing circuit cannot stabilize the output signal well, resulting in fluctuations in the output audio signal, unstable sound quality, and distortion and noise.

[0005] 3. Due to the unreasonable overall circuit design, the coordination between various electrical components is poor, which not only increases energy consumption but also reduces the lifespan of the circuit.

[0006] In summary, there is an urgent need for a new speaker monitoring audio power amplifier circuit to address the shortcomings of the existing technology and improve the audio monitoring effect and circuit performance by optimizing the circuit structure and component connection method. Utility Model Content

[0007] The purpose of this application is to provide a speaker monitoring audio power amplifier circuit to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, this application discloses the following technical solution: a speaker monitoring audio power amplifier circuit, including polarized capacitors C66, C131, C138, C115, C116, C67, C179, resistors R89, R142, R65, R168, R247, R246, R203, R204, chip U24, and connector J8;

[0009] Pin 2 of connector J8 is left floating, pin 3 of connector J8 is grounded, pin 1 of resistor R89 ​​and the negative terminal of polarized capacitor C66 are both connected to pin 1 of connector J8, pin 2 of resistor R89 ​​is connected to pin 1 of capacitor C67, pin 2 of capacitor C67 is grounded, the positive terminal of polarized capacitor C66 is connected to pin 8 of chip U24, and the positive terminal of polarized capacitor C131 and pin 2 of resistor R142 are connected to pin 3 of connector J8. All pins are connected to pin 14 of chip U24. The negative terminal of polarized capacitor C131 is grounded. Pin 1 of resistor R142 is connected to VCC. Pins 10, 11, 12, and 13 of chip U24 are all grounded. Pin 9 of chip U24 is floating. Pin 1 of chip U24 is connected to the positive terminal of polarized capacitor C138. The negative terminal of polarized capacitor C138 is grounded. Pins 3, 4, 5, and 6 of chip U24 are connected to the positive terminal of polarized capacitor C138. Pins 1 and 7 are grounded. Pins 1 of capacitor C115, R65, and R168 are all connected to pin 2 of chip U24. Pins 2 of capacitor C115 and R65 are grounded. Pin 2 of resistor R168 is connected to pin 1 of capacitor C116. Pins 1 of resistor R247 and R246 are connected to pin 2 of capacitor C116. Pin 2 of resistor R247 is connected to ASWS1. Pins 2 of resistor R246 and R203 are connected to ASWD3. Pin 2 of resistor R203 is connected to GNDA. ASWS1 and ASWD3 are both connected to AIN3. Pins 2 of resistor R204 and C179 are both connected to AIN3. Pin 1 of resistor R204 is connected to +5V. Pin 2 of capacitor C179 is grounded.

[0010] Beneficial Effects: The speaker monitoring audio power amplifier circuit of this application effectively processes the input signal through a dual-input channel design. Combined with current limiting, voltage division, and filtering, it significantly reduces interference factors in the input signal, ensuring high purity of the audio signal input to the circuit. This provides a solid foundation for subsequent amplification stages and significantly improves the accuracy and clarity of audio monitoring. Regarding circuit stability, the overall connection and power supply design ensures stable operation of the core chip. Reasonable power supply filtering reduces the impact of power fluctuations on the chip, avoiding signal interference and allowing the chip to perform in a stable working environment, reducing the risk of audio distortion caused by instability. In the signal output stage, the optimized output design filters the amplified signal again, effectively removing noise and ensuring a stable and pure audio signal output to the speaker. This allows the speaker to reproduce audio more accurately, providing users with a high-quality monitoring experience and demonstrating high practical value in real-world applications. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 The circuit diagram is shown for the speaker monitoring audio power amplifier circuit provided in the embodiment of this application. Detailed Implementation

[0013] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0015] This embodiment discloses, as follows: Figure 1 The speaker monitoring audio power amplifier circuit shown includes polarized capacitors C66, C131, C138, C115, C116, C67, and C179, resistors R89, R142, R65, R168, R247, R246, R203, and R204, a chip U24, and a connector J8.

[0016] Pin 2 of connector J8 is left floating, pin 3 of connector J8 is grounded, pin 1 of resistor R89 ​​and the negative terminal of polarized capacitor C66 are both connected to pin 1 of connector J8, pin 2 of resistor R89 ​​is connected to pin 1 of capacitor C67, pin 2 of capacitor C67 is grounded, the positive terminal of polarized capacitor C66 is connected to pin 8 of chip U24, the positive terminal of polarized capacitor C131 and pin 2 of resistor R142 are both connected to pin 14 of chip U24, the negative terminal of polarized capacitor C131 is grounded, pin 1 of resistor R142 is connected to VCC, pins 10, 11, 12 and 13 of chip U24 are all grounded, pin 9 of chip U24 is left floating, pin 1 of chip U24 is connected to the positive terminal of polarized capacitor C138, the negative terminal of polarized capacitor C138 is grounded, pins 3, 4, 5, 6 and... All 7 pins are grounded. Pin 1 of capacitor C115, pin 1 of resistor R65, and pin 1 of resistor R168 are all connected to pin 2 of chip U24. Pin 2 of capacitor C115 and pin 2 of resistor R65 are grounded. Pin 2 of resistor R168 is connected to pin 1 of capacitor C116. Pin 1 of resistor R247 and pin 1 of resistor R246 are both connected to pin 2 of capacitor C116. Pin 2 of resistor R247 is connected to ASWS1. Pin 2 of resistor R246 and pin 1 of resistor R203 are both connected to ASWD3. Pin 2 of resistor R203 is connected to GNDA. ASWS1 and ASWD3 are both connected to AIN3. Pin 2 of resistor R204 and pin 1 of capacitor C179 are both connected to AIN3. Pin 1 of resistor R204 is connected to +5V. Pin 2 of capacitor C179 is grounded.

[0017] In the specific application of this embodiment, there are two preamplifier signal inputs at the front end. One path is connected to pin 2 of chip U24 (LM384N in this embodiment) after being current-limited and filtered by resistor R247, capacitor C116 and resistor R168 in series (ASWS1 in this embodiment). Capacitor C115 and resistor R65 are connected in parallel to ground to provide high-pass filtering for the signal at pin 2 of chip U24. The other path is connected to pin 2 of chip U24 after being current-limited and filtered by resistor R203 in parallel (ASWD3 in this embodiment). Capacitor R246, capacitor C116 and resistor R168 are connected in series to provide high-pass filtering for the signal at pin 2 of chip U24. Capacitor C115 and resistor R65 are connected in parallel to ground to provide high-pass filtering for the signal at pin 2 of chip U2. Furthermore, a series capacitor C138 is connected to ground for filtering at pin 1 of chip U24. Pins 3, 4, 5, 6, 7, 10, 11, 12, and 13 of chip U24 are grounded. The VCC power supply input is current-limited by a series resistor R142. After being filtered by a parallel capacitor C131 connected to ground, the power supply is input to pin 14 of chip U24. Pin 9 of chip U24 is unused. The amplified signal is output from pin 8 of chip U24 coupled to a polarized capacitor C66. To output a stable signal, a series resistor R89 ​​and a capacitor C67 are connected in parallel to ground at the output of polarized capacitor C66 for filtering.

[0018] In summary, the speaker monitoring audio power amplifier circuit of this embodiment effectively processes the input signal through a dual-input channel design. Combined with current limiting, voltage division, and filtering, it significantly reduces interference factors in the input signal, ensuring high purity of the audio signal input to the circuit. This provides a solid foundation for subsequent amplification stages and significantly improves the accuracy and clarity of audio monitoring. Regarding circuit stability, the overall connection and power supply design ensures stable operation of the core chip. The power supply undergoes reasonable filtering to reduce the impact of power fluctuations on the chip, avoiding signal interference and enabling the chip to perform optimally in a stable working environment, thus reducing the risk of audio distortion caused by instability. In the signal output stage, the optimized output design filters the amplified signal again, effectively removing noise and ensuring a stable and pure audio signal output to the speaker. This allows the speaker to reproduce audio more accurately, providing users with a high-quality monitoring experience and demonstrating high practical value in real-world applications.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A horn monitor audio power amplifier circuit, characterized by, The polar capacitor C66, the polar capacitor C131, the polar capacitor C138, the capacitor C115, the capacitor C116, the capacitor C67, the capacitor C179, the resistor R89, the resistor R142, the resistor R65, the resistor R168, the resistor R247, the resistor R246, the resistor R203, the resistor R204, the chip U24 and the connector J8 are connected in series. The 2-pin of the connector J8 is suspended, the 3-pin of the connector J8 is grounded, the 1-pin of the resistor R89 and the negative electrode of the polar capacitor C66 are connected to the 1-pin of the connector J8, the 2-pin of the resistor R89 is connected to the 1-pin of the capacitor C67, the 2-pin of the capacitor C67 is grounded, the positive electrode of the polar capacitor C66 is connected to the 8-pin of the chip U24, the positive electrode of the polar capacitor C131 and the 2-pin of the resistor R142 are connected to the 14-pin of the chip U24, the negative electrode of the polar capacitor C131 is grounded, the 1-pin of the resistor R142 is connected to VCC, the 10-pin, the 11-pin, the 12-pin and the 13-pin of the chip U24 are grounded, the 9-pin of the chip U24 is suspended, the 1-pin of the chip U24 is connected to the positive electrode of the polar capacitor C138, the negative electrode of the polar capacitor C138 is grounded, the 3-pin, the 4-pin, the 5-pin, the 6-pin and the 7-pin of the chip U24 are grounded, the 1-pin of the capacitor C115, the 1-pin of the resistor R65 and the 1-pin of the resistor R168 are connected to the 2-pin of the chip U24, the 2-pin of the capacitor C115 and the 2-pin of the resistor R65 are grounded, the 2-pin of the resistor R168 is connected to the 1-pin of the capacitor C116, the 1-pin of the resistor R247 and the 1-pin of the resistor R246 are connected to the 2-pin of the capacitor C116, the 2-pin of the resistor R247 is connected to ASWS1, the 2-pin of the resistor R246 and the 1-pin of the resistor R203 are connected to ASWD3, the 2-pin of the resistor R203 is connected to GNDA, ASWS1 and ASWD3 are connected to AIN3, the 2-pin of the resistor R204 and the 1-pin of the capacitor C179 are connected to AIN3, the 1-pin of the resistor R204 is connected to +5V, and the 2-pin of the capacitor C179 is grounded.

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