Loudspeaker box power amplification circuit

A power amplifier circuit and sound box technology, which is applied to power amplifiers, improved amplifiers to improve efficiency, etc., can solve the problems of high turn-on voltage of MOS tubes, failure to achieve expected effects, and crossover distortion of transmitted signals, so as to achieve less distortion and improve Efficiency and cost reduction effect

Inactive Publication Date: 2016-03-02
NINGBO POLINATA ELECTRONICS
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  • Abstract
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  • Claims
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Problems solved by technology

The power amplifier circuit with MOS tube as the main component needs more protection measures, and the MOS tube is easily damaged when the input and output are overloaded.
Moreover, the turn-on voltage of the MOS tube is very high, and the transmission signal of the MOS tube is prone to crossover distortion at low frequencies, which leads to the failure to achieve the expected effect when the sound signal is converted into sound playback

Method used

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  • Loudspeaker box power amplification circuit

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Embodiment Construction

[0017] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0018] Such as figure 1 As shown, the present invention includes a signal input module, and also includes a voltage amplification module, connected to the signal input module, for amplifying the signal input by the signal input module; an overcurrent protection module, connected to the voltage amplification module, used to protect the circuit and prevent over The current causes damage to the circuit;

[0019] The current amplification module, connected with the overcurrent protection module, amplifies the power in the circuit to drive the external speaker equipment; the signal output module, connected with the current amplification module, is used to output signals; the overload prompt module, connected with the current am...

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Abstract

The invention provides a loudspeaker box power amplification circuit, and belongs to the technical field of loudspeaker box power amplification. The loudspeaker box power amplification circuit has the advantages that the cost is low, the transmitted signals are not easy to distort, and the power can be amplified at multiple levels. The power amplification circuit comprises a signal input module, a voltage amplification module, an over-current protection module, a current amplification module, a signal output module and an over-load reminding module. The main components of the power amplification circuit are triodes; the conducting voltage of each triode at a low frequency band is relatively low, so that generated crossover distortion can be decreased to the lowest; and the triodes used in the current are easier to match, so that the circuit cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of sound box power amplification, and relates to a sound box power amplifier circuit. Background technique [0002] The power amplifier circuit in the speaker is usually used to amplify the signal transmitted by the microphone or other equipment, and then the sound is played by the speaker and other equipment. Since the transmitted signal is an electrical signal converted from sound, it is very important to prevent signal distortion. Most of the power amplifier circuits of speakers that are widely used today use MOS tubes as the main components of the power amplifier circuits. The power amplifier circuit with MOS tube as the main component needs more protection measures, and the MOS tube is easily damaged when the input and output are overloaded. Moreover, the turn-on voltage of the MOS tube is very high, and the transmission signal of the MOS tube is prone to crossover distortion at low frequencies, resul...

Claims

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Application Information

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IPC IPC(8): H03F1/07H03F3/20
Inventor 阮松杰
Owner NINGBO POLINATA ELECTRONICS
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