Primary amplifier circuit for internal communication audio signals

Abstract

The utility model relates to the technical field of communication control, and discloses an audio signal pre-amplifier circuit for internal communication, which comprises an audio signal input port, a double-differential channel A, a double-differential channel B, a double-differential channel C and a double-differential channel D. Through the special J9 socket, the stability and compatibility of audio signal input are ensured, the problem of unstable connection of a traditional interface is solved, multi-channel amplification can be simultaneously performed on audio signals through four independent double differential channels, mutual interference among the channels is avoided, the quality and the transmission efficiency of the audio signals are greatly improved, and the application prospect is wide. Therefore, a reliable audio signal pre-amplification function is provided for an internal communication system, the requirements of modern internal communication for high-quality and multi-channel processing of audio signals are met, the audio signals can be accurately and stably transmitted in the system, and communication smoothness is guaranteed.

Description

Technical Field

[0001] This application relates to the field of communication control technology, specifically a preamplifier circuit for internal communication audio signals. Background Technology

[0002] In the field of internal communications, effective processing of audio signals is a crucial step in ensuring accurate information transmission. Existing audio signal amplifier circuits have revealed numerous problems in practical applications, specifically:

[0003] 1. Traditional products of this type mostly use relatively simple circuit architectures, and their signal input interfaces lack unified standards, resulting in poor compatibility and frequent unstable signal connections, which seriously affects the transmission efficiency of audio signals. During signal amplification, different channels are usually not designed independently and meticulously, leading to severe signal interference between channels and a significant decrease in audio quality.

[0004] 2. Existing technologies have significant shortcomings in filtering, failing to effectively filter out various noises and spurious signals, resulting in the output audio signal being mixed with a large number of interference components, and the clarity and fidelity falling far short of the stringent requirements of modern internal communication.

[0005] 3. With the rapid development of communication technology, the demand for amplifier circuits that can process multi-channel audio signals simultaneously and have high reliability and stability is increasing.

[0006] In summary, there is an urgent need for a new technical solution for preamplifying internal communication audio signals to solve the aforementioned technical problems. Utility Model Content

[0007] The purpose of this application is to provide a preamplifier circuit for internal communication audio signals to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, this application discloses the following technical solution: a preamplifier circuit for internal communication audio signals, including an audio signal input port, dual differential channels A, B, C, and D;

[0009] The audio signal input port is socket J9;

[0010] The dual differential channel A, dual differential channel B, dual differential channel C, and dual differential channel D are all used to amplify the audio signal input from the audio signal input port;

[0011] The dual differential channels A, B, C, and D are all connected to the audio signal input port.

[0012] Preferably, pin CON11 of the dual differential channel A undergoes signal resonance filtering via capacitor C123 and resistor R137, and the filtered audio signal is then sent to pin 2 of operational amplifier U12A for inverting input amplification; pin CON3 undergoes signal resonance filtering via capacitor C128 and resistor R136, and the filtered audio signal is then sent to pin 3 of operational amplifier U12A for non-inverting input amplification.

[0013] Among them, resistor R138 and capacitor C143 form an RC integral filter at pin 2 and pin 1 of operational amplifier U12A, and resistor R135 and capacitor C145 are connected in parallel to ground for GNDA filtering.

[0014] The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U12A to resistor R186, outputting BSWS3.

[0015] Preferably, pin CON12 of the dual differential channel B undergoes signal resonance filtering via capacitor C122 and resistor R133, and the filtered audio signal is then sent to pin 6 of operational amplifier U12B for inverting input amplification; pin CON4 undergoes signal resonance filtering via capacitor C132 and resistor R132, and the filtered audio signal is then sent to pin 5 of operational amplifier U12B for non-inverting input amplification.

[0016] Among them, resistor R134 and capacitor C146 form an RC integral filter at pins 6 and 7 of operational amplifier U12B, and resistor R131 and capacitor C147 are connected in parallel to ground for GNDA filtering.

[0017] The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U12B to resistor R191 to output BSWS2.

[0018] Preferably, pin CON9 of the dual differential channel C undergoes signal resonance filtering via capacitor C125 and resistor R223, and the filtered audio signal is then sent to pin 2 of operational amplifier U11A for inverting input amplification; pin CON1 undergoes signal resonance filtering via capacitor C126 and resistor R224, and the filtered audio signal is then sent to pin 3 of operational amplifier U11A for non-inverting input amplification.

[0019] Among them, resistor R225 and capacitor C139 form an RC integral filter at pin 2 and pin 1 of operational amplifier U11A, and resistor R227 and capacitor C141 are connected in parallel to ground for GNDA filtering.

[0020] The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U11A to resistor R196, outputting ASCL.

[0021] Preferably, pin CON10 of the dual differential channel D undergoes signal resonance filtering via capacitor C124 and series resistor R141, and the filtered audio signal is then sent to pin 6 of operational amplifier U11B for inverting input amplification; pin CON2 undergoes signal resonance filtering via capacitor C127 and series resistor R140, and the filtered audio signal is then sent to pin 5 of operational amplifier U11B for non-inverting input amplification.

[0022] Among them, resistor R226 and capacitor C148 form an RC integral filter at pins 6 and 7 of operational amplifier U11B, and resistor R139 and capacitor C142 are connected in parallel to ground for GNDA filtering.

[0023] The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U11B to output BSWS4 via R106.

[0024] Beneficial effects: The preamplifier circuit for internal communication audio signals in this application ensures the stability and compatibility of audio signal input through a dedicated J9 socket, solving the problem of unstable traditional interface connections. Four independent dual differential channels can simultaneously amplify audio signals in multiple channels, avoiding mutual interference between channels and greatly improving the quality and transmission efficiency of the audio signal. This provides a reliable audio signal preamplifier function for the internal communication system, meeting the modern internal communication requirements for high-quality, multi-channel audio signal processing, enabling accurate and stable transmission of audio signals in the system, and ensuring smooth communication. Attached Figure Description

[0025] 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.

[0026] Figure 1 The circuit schematic diagram is provided for an embodiment of this application for a preamplifier circuit for internal communication audio signals. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] This embodiment discloses, as follows: Figure 1 The circuit shown is a preamplifier circuit for internal communication audio signals, including an audio signal input port, dual differential channels A, B, C, and D.

[0030] The audio signal input port is socket J9;

[0031] Dual differential channels A, B, C, and D are all used to amplify the audio signal input from the audio signal input port.

[0032] Dual differential channels A, B, C, and D are all connected to the audio signal input port.

[0033] Through the above, this embodiment ensures the stability and compatibility of audio signal input via a dedicated J9 socket, solving the problem of unstable traditional interface connections. Four independent dual differential channels can simultaneously amplify audio signals in multiple channels, avoiding mutual interference between channels and greatly improving the quality and transmission efficiency of the audio signal. This provides a reliable audio signal preamplifier function for the internal communication system, meeting the modern internal communication requirements for high-quality, multi-channel audio signal processing. This ensures accurate and stable transmission of audio signals within the system, guaranteeing smooth communication.

[0034] Specifically, pin CON11 of the dual differential channel A undergoes signal resonant filtering via capacitor C123 and resistor R137, and the filtered audio signal is then sent to pin 2 of operational amplifier U12A for inverting input amplification; pin CON3 undergoes signal resonant filtering via capacitor C128 and resistor R136, and the filtered audio signal is then sent to pin 3 of operational amplifier U12A for non-inverting input amplification.

[0035] Among them, resistor R138 and capacitor C143 form an RC integral filter at pin 2 and pin 1 of operational amplifier U12A, and resistor R135 and capacitor C145 are connected in parallel to ground for GNDA filtering.

[0036] The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U12A to resistor R186, outputting BSWS3.

[0037] Based on the above, this embodiment utilizes a specific combination of signal resonant filtering and integral filtering in the dual differential channel A to achieve high-quality amplification of the audio signal. CON11 and CON3 pins undergo signal resonant filtering via a combination of capacitors and resistors, accurately selecting the effective audio signal and removing interference components. In operational amplifier U12A, the RC integral filtering of R138 and C143 and the parallel GNDA filtering of R135 and C145 further improve signal quality. Ultimately, the BSWS3 signal output from pin 1 of operational amplifier U12A to resistor R186 achieves high clarity and stability, effectively improving the situation where the amplified audio signal is easily interfered with and of poor quality in traditional circuits, ensuring reliable transmission of the audio signal in internal communication.

[0038] It should be noted that the dual differential channels A, B, C, and D in this embodiment have the same structure. Therefore, this embodiment summarizes the technical effects of dual differential channel A, and does not elaborate on the technical effects of dual differential channels B, C, and D.

[0039] Specifically, pin CON12 of the dual differential channel B undergoes signal resonant filtering via capacitor C122 and resistor R133, and the filtered audio signal is then sent to pin 6 of operational amplifier U12B for inverting input amplification; pin CON4 undergoes signal resonant filtering via capacitor C132 and resistor R132, and the filtered audio signal is then sent to pin 5 of operational amplifier U12B for non-inverting input amplification.

[0040] Among them, resistor R134 and capacitor C146 form an RC integral filter at pins 6 and 7 of operational amplifier U12B, and resistor R131 and capacitor C147 are connected in parallel to ground for GNDA filtering.

[0041] The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U12B to resistor R191 to output BSWS2.

[0042] Specifically, pin CON9 of the dual differential channel C undergoes signal resonant filtering via capacitor C125 and resistor R223, and the filtered audio signal is then sent to pin 2 of operational amplifier U11A for inverting input amplification; pin CON1 undergoes signal resonant filtering via capacitor C126 and resistor R224, and the filtered audio signal is then sent to pin 3 of operational amplifier U11A for non-inverting input amplification.

[0043] Among them, resistor R225 and capacitor C139 form an RC integral filter at pin 2 and pin 1 of operational amplifier U11A, and resistor R227 and capacitor C141 are connected in parallel to ground for GNDA filtering.

[0044] The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U11A to resistor R196, outputting ASCL.

[0045] Specifically, pin CON10 of the dual differential channel D undergoes signal resonant filtering via capacitor C124 and resistor R141, and the filtered audio signal is then sent to pin 6 of operational amplifier U11B for inverting input amplification; pin CON2 undergoes signal resonant filtering via capacitor C127 and resistor R140, and the filtered audio signal is then sent to pin 5 of operational amplifier U11B for non-inverting input amplification.

[0046] Among them, resistor R226 and capacitor C148 form an RC integral filter at pins 6 and 7 of operational amplifier U11B, and resistor R139 and capacitor C142 are connected in parallel to ground for GNDA filtering.

[0047] The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U11B to output BSWS4 via R106.

[0048] In summary, the preamplifier circuit for internal communication audio signals in this embodiment ensures the stability and compatibility of audio signal input, solves the problem of unstable traditional interface connections, and features four independent dual differential channels that can simultaneously amplify audio signals in multiple channels, avoiding mutual interference between channels and greatly improving the quality and transmission efficiency of audio signals. This provides a reliable audio signal preamplifier function for the internal communication system, meeting the modern internal communication requirements for high-quality, multi-channel audio signal processing, enabling accurate and stable transmission of audio signals within the system, and ensuring smooth communication.

[0049] 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 preamplifier circuit for internal communication audio signals, characterized in that, It includes an audio signal input port, dual differential channel A, dual differential channel B, dual differential channel C, and dual differential channel D; The audio signal input port is socket J9; The dual differential channel A, dual differential channel B, dual differential channel C, and dual differential channel D are all used to amplify the audio signal input from the audio signal input port; The dual differential channels A, B, C, and D are all connected to the audio signal input port.

2. The preamplifier circuit for internal communication audio signals according to claim 1, characterized in that, The dual differential channel A's pin CON11 undergoes signal resonance filtering via capacitor C123 and resistor R137, and the filtered audio signal is then sent to pin 2 of operational amplifier U12A for inverted input amplification. Pin CON3 is connected to capacitor C128 in series with resistor R136 for signal resonance filtering. The audio signal after signal resonance filtering is then sent to pin 3 of operational amplifier U12A for non-inverting input amplification. Among them, resistor R138 and capacitor C143 form an RC integral filter at pin 2 and pin 1 of operational amplifier U12A, and resistor R135 and capacitor C145 are connected in parallel to ground for GNDA filtering. The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U12A to resistor R186, outputting BSWS3.

3. The preamplifier circuit for internal communication audio signals according to claim 1, characterized in that, The dual differential channel B's pin CON12 undergoes signal resonance filtering via capacitor C122 and resistor R133, and the filtered audio signal is then sent to pin 6 of operational amplifier U12B for inverted input amplification. Pin CON4 is connected to capacitor C132 in series with resistor R132 for signal resonance filtering. The audio signal after signal resonance filtering is then sent to pin 5 of operational amplifier U12B for non-inverting input amplification. Among them, resistor R134 and capacitor C146 form an RC integral filter at pins 6 and 7 of operational amplifier U12B, and resistor R131 and capacitor C147 are connected in parallel to ground for GNDA filtering. The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U12B to resistor R191 to output BSWS2.

4. The preamplifier circuit for internal communication audio signals according to claim 1, characterized in that, The dual differential channel C's pin CON9 undergoes signal resonance filtering via capacitor C125 and resistor R223, and the filtered audio signal is then sent to pin 2 of operational amplifier U11A for inverted input amplification. Pin CON1 is connected to capacitor C126 in series with resistor R224 for signal resonance filtering. The audio signal after signal resonance filtering is then sent to pin 3 of operational amplifier U11A for non-inverting input amplification. Among them, resistor R225 and capacitor C139 form an RC integral filter at pin 2 and pin 1 of operational amplifier U11A, and resistor R227 and capacitor C141 are connected in parallel to ground for GNDA filtering. The amplified audio signal from the two signals is sent to pin 1 of operational amplifier U11A to resistor R196, outputting ASCL.

5. The preamplifier circuit for internal communication audio signals according to claim 1, characterized in that, The dual differential channel D's pin CON10 undergoes signal resonance filtering via capacitor C124 and resistor R141, and the filtered audio signal is then sent to pin 6 of operational amplifier U11B for inverted input amplification. Pin CON2 is connected to capacitor C127 in series with resistor R140 for signal resonance filtering. The audio signal after signal resonance filtering is then sent to pin 5 of operational amplifier U11B for non-inverting input amplification. Among them, resistor R226 and capacitor C148 form an RC integral filter at pins 6 and 7 of operational amplifier U11B, and resistor R139 and capacitor C142 are connected in parallel to ground for GNDA filtering. The amplified audio signal from the two signals is sent to pin 7 of operational amplifier U11B to output BSWS4 via R106.

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