Novel sound effect processing power amplifier circuit

Abstract

The utility model relates to the technical field of sound effect processing, and particularly discloses a novel sound effect processing power amplifier circuit, which comprises a first pre-amplification circuit, a second pre-amplification circuit, a sound effect processing circuit, a left sound channel output circuit and a right sound channel output circuit, the sound effect processing circuit is electrically connected with the first pre-amplification circuit and the second pre-amplification circuit, and the left sound channel output circuit is electrically connected with the sound effect processing circuit and the first pre-amplification circuit. And the right sound channel output circuit is electrically connected with the sound effect processing circuit and the second pre-amplification circuit respectively. According to the utility model, the sound effect processing circuit is arranged to process the audio signal output after sampling of the pre-amplification circuit so as to obtain the required sound effect, so that the output power of the power amplification circuit reaches the required output power, the circuit structure is simple and reliable, the sound effect can be obviously enhanced and improved, the sound quality is good, the conversion rate is high, and the reduction degree is good.

Description

Technical Field

[0001] The utility model relates to the technical field of sound effect processing, in particular to a novel sound effect processing power amplifier circuit. Background Art

[0002] With the rapid development of social economy and science and technology, people's living standards are improving day by day, and higher requirements are being placed on the technological level and innovation capabilities of functions such as the application experience of car multimedia, human-computer interaction, and perfect sound quality. With the increasing application of smart speakers, Bluetooth speakers, loudspeakers, etc., the market has put forward higher requirements on portability and sound effects. Sound effect processing is inseparable from power amplifier control. With the rapid development of power amplifier related technologies and power amplifier chips, power amplifier chip control is also being used more and more in various fields. At the same time, more and more attention is also being paid to the precise control and effective protection of power amplifier chips.

[0003] After searching, the Chinese utility model patent with patent application number CN202322658498.8 discloses a dynamic boost audio power amplifier circuit, including a boost unit, a power amplifier unit, and a single-chip microcomputer. The audio power output by the power amplifier unit is controlled by the boost output voltage of the boost unit, saving the power consumption of the audio power amplifier circuit and improving the battery life of the product. When playing at a high volume, especially when playing explosive songs such as rock music, the bass is stronger and fuller due to the increase in power.

[0004] Another example is a Chinese utility model patent application numbered CN202222104834.X, which discloses a low-cost audio power amplifier circuit, comprising a signal input circuit, a power input circuit, a first triode coupling amplifier circuit, a second triode coupling amplifier circuit, a left channel output circuit, and a right channel output circuit. The first triode coupling amplifier circuit is electrically connected to the signal input circuit and the left channel output circuit, respectively; the second triode coupling amplifier circuit is electrically connected to the signal input circuit and the right channel output circuit, respectively; and the power input circuit is electrically connected to the first triode coupling amplifier circuit and the second triode coupling amplifier circuit, respectively. This utility model provides a first triode coupling amplifier circuit and a second triode coupling amplifier circuit to couple power amplify the input audio signal, and then output the audio signal through the left channel output circuit and the right channel output circuit, respectively, thereby reducing circuit costs and resulting in relatively low production costs.

[0005] Although the above-mentioned existing power amplifier circuits can meet basic usage requirements, they all use simple triode amplifier circuits at the pre-stage input, and directly send the audio signal to the power amplifier stage after the pre-stage output. As a result, the sound quality of the power amplifier product may be dry, the conversion rate is low, and the restoration degree is poor. Utility Model Content

[0006] The technical problem to be solved by the present invention is that, in response to the above-mentioned defects of the prior art, a new sound effect processing power amplifier circuit is provided. By setting up a sound effect processing circuit, the audio signal output after sampling by the above-mentioned preamplifier circuit is processed to obtain the required sound effect. The circuit structure is simple and reliable, and can significantly enhance and improve the sound effect, with good sound quality, high conversion rate and good restoration.

[0007] In order to solve the above technical problems, the technical solution of the utility model is:

[0008] A novel audio processing power amplifier circuit includes a first preamplifier circuit, a second preamplifier circuit, an audio processing circuit, a left channel output circuit, and a right channel output circuit. The audio processing circuit is electrically connected to the first preamplifier circuit and the second preamplifier circuit, respectively. The left channel output circuit is electrically connected to the audio processing circuit and the first preamplifier circuit, respectively. The right channel output circuit is electrically connected to the audio processing circuit and the second preamplifier circuit, respectively.

[0009] Preferably, the sound processing circuit includes a sound processing chip U2, a transistor Q1, a transistor Q3 and a peripheral circuit of the sound processing chip, and the transistor Q1, the transistor Q3 and the peripheral circuit of the sound processing chip are all connected to the sound processing chip U2.

[0010] Preferably, the first preamplifier circuit includes a power amplifier U1, an audio input terminal J1, a resistor R13 and a resistor R14, the positive input terminal of the power amplifier U1 is connected to the audio input terminal J1, and the reverse input terminal of the power amplifier U1 is connected to the sound processing chip U2 via the resistor R13 and the resistor R14 in sequence.

[0011] Preferably, the second preamplifier circuit includes a power amplifier U3, an audio input terminal J2, a resistor R25 and a resistor R26, the positive input terminal of the power amplifier U3 is connected to the audio input terminal J2, and the reverse input terminal of the power amplifier U3 is connected to the sound processing chip U2 via the resistor R25 and the resistor R26 in sequence.

[0012] Preferably, the left channel output circuit includes a transistor Q18, an audio output port J3, a capacitor C7 and a capacitor C14. The audio output port J3 is connected to the output end of the power amplifier U1 via the capacitor C14, the resistor R19 and the capacitor C17 in sequence. The emitter of the transistor Q18 is connected to the capacitor C14 via the capacitor C13 and the resistor R17 in sequence.

[0013] Preferably, the right channel output circuit includes a transistor Q2, an audio output port J4, a capacitor C16 and a capacitor C31. The audio output port J4 is connected to the output end of the power amplifier U3 via the capacitor C21, the resistor R31 and the capacitor C16 in sequence. The emitter of the transistor Q2 is connected to the capacitor C21 via the capacitor C20 and the resistor R29 in sequence.

[0014] By adopting the above technical solution, the utility model provides a novel sound effect processing power amplifier circuit, which has the following beneficial effects: the sound effect processing circuit in the novel sound effect processing power amplifier circuit is electrically connected to the first preamplifier circuit and the second preamplifier circuit respectively, the left channel output circuit is electrically connected to the sound effect processing circuit and the first preamplifier circuit respectively, and the right channel output circuit is electrically connected to the sound effect processing circuit and the second preamplifier circuit respectively, the first preamplifier circuit and the second preamplifier circuit collect audio signals and input them to the sound effect processing circuit, the sound effect processing circuit processes the audio signals sampled and output by the preamplifier circuit to obtain the desired sound effect, the output end of the sound effect processing circuit is connected to the input end of the preamplifier circuit for amplifying the audio signal after sound effect processing, the output end of the preamplifier circuit is connected to the left channel output circuit and the right channel output circuit, so that the output power of the power amplifier circuit reaches the required output power, the circuit structure is simple and reliable, can significantly enhance and improve the sound effect, with good sound quality, high conversion rate, and good restoration, and also reduces costs and saves space on the circuit board.

[0015] The sound effect processing circuit processes the audio signal sampled and output by the preamplifier circuit to obtain a sound effect, and processes the input audio sampling signal to obtain a desired sound effect. The output end of the sound effect processing circuit is connected to the input end of the power amplifier circuit to amplify the audio signal after sound effect processing. The output end of the power amplifier circuit is connected to a speaker to ensure that the output power of the audio power amplifier circuit reaches the required output power.

[0016] The transition voltage regulator circuit compares the external power supply voltage with the boosted voltage output by the boost circuit. If the boosted voltage during its dynamic rise is less than or equal to the power supply voltage, the transition voltage regulator circuit outputs the power supply voltage to the regulated power supply terminal. If the boosted voltage during its dynamic rise is greater than the power supply voltage, the voltage regulator control circuit regulates the input boosted voltage, generates a regulated output voltage, and switches it to the regulated power supply terminal. This ensures a stable supply voltage to the main control circuit, which is unaffected by lithium battery voltage fluctuations and prevents undervoltage protection. This maximizes the actual lithium battery efficiency, reduces costs, and saves circuit board space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0018] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0021] like Figure 1 As shown, the novel audio processing power amplifier circuit includes a first preamplifier circuit, a second preamplifier circuit, an audio processing circuit, a left channel output circuit, and a right channel output circuit. The audio processing circuit is electrically connected to the first and second preamplifier circuits, respectively. The left channel output circuit is electrically connected to the audio processing circuit and the first preamplifier circuit, respectively. The right channel output circuit is electrically connected to the audio processing circuit and the second preamplifier circuit, respectively. It will be understood that in actual applications, the first preamplifier circuit, the second preamplifier circuit, the audio processing circuit, the left channel output circuit, and the right channel output circuit can all be integrated on a single PCB circuit board.

[0022] Specifically, the sound processing circuit includes a sound processing chip U2, a transistor Q1, a transistor Q3 and a peripheral circuit of the sound processing chip, and the transistor Q1, the transistor Q3 and the peripheral circuit of the sound processing chip are all connected to the sound processing chip U2; the first preamplifier circuit includes a power amplifier U1, an audio input terminal J1, a resistor R13 and a resistor R14, the positive input terminal of the power amplifier U1 is connected to the audio input terminal J1, and the reverse input terminal of the power amplifier U1 is connected to the sound processing chip U2 via the resistor R13 and the resistor R14 in sequence; the second preamplifier circuit includes a power amplifier U3, an audio input terminal J2, a resistor R25 and a resistor R26, the positive input terminal of the power amplifier U3 is connected to the audio input terminal J2, and the reverse input terminal of the power amplifier U3 is connected to the sound processing chip U2 via the resistor R25 and the resistor R26 in sequence. It can be understood that the sound processing chip U2 can be a 4052B chip, etc., which is used to compare the external power supply voltage with the boosted voltage output by the preamplifier circuit. If the voltage value of the boosted voltage during the dynamic rising process is less than or equal to the power supply voltage, the power supply voltage is output to the regulated power supply end. If the boosted voltage is greater than the power supply voltage during the dynamic rising process, the input boosted voltage is stabilized and controlled to generate an output regulated voltage and switch to the regulated power supply end, so that the output power of the power amplifier circuit reaches the required output power, thereby obtaining the desired sound effect.

[0023] Specifically, the left channel output circuit includes a transistor Q18, an audio output port J3, a capacitor C7, and a capacitor C14. The audio output port J3 is connected to the output of the power amplifier U1 via capacitor C14, resistor R19, and capacitor C17. The emitter of the transistor Q18 is connected to the capacitor C14 via capacitor C13 and resistor R17. The right channel output circuit includes a transistor Q2, an audio output port J4, a capacitor C16, and a capacitor C31. The audio output port J4 is connected to the output of the power amplifier U3 via capacitor C21, resistor R31, and capacitor C16. The emitter of the transistor Q2 is connected to the capacitor C21 via capacitor C20 and resistor R29. It is understood that both the power amplifier U1 and the power amplifier U3 can be 4558 power amplifiers, etc. The audio output port J3 and the audio output port J4 are both connected to the speaker.

[0024] It can be understood that the present invention has a reasonable design and a unique structure. By setting a first preamplifier circuit and a second preamplifier circuit to collect audio signals and input them into a sound effect processing circuit, the sound effect processing circuit processes the audio signal output after sampling by the above-mentioned preamplifier circuit to obtain the desired sound effect. The output end of the sound effect processing circuit is connected to the input end of the preamplifier circuit for amplifying the audio signal after sound effect processing. The output end of the above-mentioned preamplifier circuit is connected to the left channel output circuit and the right channel output circuit, so that the output power of the power amplifier circuit reaches the required output power. The circuit structure is simple and reliable, which can significantly enhance and improve the sound effect, with good sound quality, high conversion rate, and good restoration. It also reduces costs and saves space on the circuit board.

[0025] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A new type of sound effect processing amplifier circuit, characterized by: The system includes a first preamplifier circuit, a second preamplifier circuit, an audio processing circuit, a left channel output circuit, and a right channel output circuit. The audio processing circuit is electrically connected to the first preamplifier circuit and the second preamplifier circuit, respectively. The left channel output circuit is electrically connected to the audio processing circuit and the first preamplifier circuit, respectively. The right channel output circuit is electrically connected to the audio processing circuit and the second preamplifier circuit, respectively.

2. The novel sound effect processing power amplifier circuit according to claim 1, characterized in that: The sound processing circuit includes a sound processing chip U2, a transistor Q1, a transistor Q3 and a peripheral circuit of the sound processing chip. The transistor Q1, the transistor Q3 and the peripheral circuit of the sound processing chip are all connected to the sound processing chip U2.

3. The novel sound effect processing power amplifier circuit according to claim 2, characterized in that: The first preamplifier circuit includes a power amplifier U1, an audio input terminal J1, a resistor R13 and a resistor R14. The positive input terminal of the power amplifier U1 is connected to the audio input terminal J1, and the reverse input terminal of the power amplifier U1 is connected to the sound processing chip U2 via the resistor R13 and the resistor R14 in sequence.

4. The novel sound effect processing power amplifier circuit according to claim 2, characterized in that: The second preamplifier circuit includes a power amplifier U3, an audio input terminal J2, a resistor R25 and a resistor R26. The positive input terminal of the power amplifier U3 is connected to the audio input terminal J2, and the reverse input terminal of the power amplifier U3 is connected to the sound processing chip U2 via the resistor R25 and the resistor R26 in sequence.

5. The novel sound effect processing power amplifier circuit according to claim 3, characterized in that: The left channel output circuit includes a transistor Q18, an audio output port J3, a capacitor C7, and a capacitor C14. The audio output port J3 is connected to the output end of the power amplifier U1 via the capacitor C14, the resistor R19, and the capacitor C17 in sequence. The emitter of the transistor Q18 is connected to the capacitor C14 via the capacitor C13 and the resistor R17 in sequence.

6. The novel sound effect processing power amplifier circuit according to claim 3, characterized in that: The right channel output circuit includes a transistor Q2, an audio output port J4, a capacitor C16 and a capacitor C31. The audio output port J4 is connected to the output end of the power amplifier U3 via a capacitor C21, a resistor R31 and a capacitor C16 in sequence. The emitter of the transistor Q2 is connected to the capacitor C21 via a capacitor C20 and a resistor R29 in sequence.

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