High-power digital power amplification output circuit

Abstract

The invention discloses a high-power digital power amplification output circuit, which mainly solves the problems of complicated circuit structure, low output power and poor filtering effect in the prior art. The high-power digital power amplification output circuit comprises a power module, an inversion module and a filtering module, wherein the power module comprises 16 step modulation power sub modules, a pulse width modulation power sub module and a redundancy sub module, all of the sub modules are sequentially connected in series for generating positive power amplification signals to be output to the inversion module, the inversion module comprises four serial connection sub modules in identical structures, the serial connection sub modules are connected in pairs for forming two bridge arms so that two paths of signals with the same size and opposite phases can be generated, complete power amplification signals are generated through overlapping and are output to the filtering module, and the filtering module outputs the signals after carrying out filtering on the signals input by the inversion module. The high-power digital power amplification output circuit has the advantages that the circuit structure is simple, the output power is high, and the filtering effect is good. The high-power digital power amplification output circuit can be used in the field of high-power digital audio power amplification.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, in particular to a high-power digital power amplifier output circuit, which can be applied to a digital audio power amplification system. Background technique [0002] In recent years, my country's audio power amplifier industry has developed rapidly, and domestic production technology has been continuously improved. With the continuous development of audio equipment digital technology and the need for high-fidelity audio equipment, people have realized the importance of the development and design of digital audio power amplifiers. Therefore, the digital amplification technology that directly processes the digital audio signal has a great application prospect. Traditional analog power amplifiers generally use power frequency transformer power supply and class AB power amplifiers, which are low in efficiency, large in size and heavy, and their application occasions are greatly limited...

AI Technical Summary

Problems solved by technology

This kind of circuit structure has to realize the output of positive and negative phase waveforms in each topological circuit, resulting in complex circuit structure, low circuit utilization rate and large number of cascaded circuits; at the same time, due to the bridge inverter circuit composed of a single switch tube , resulting in low withstand voltage of the bridge arm of the inverter circuit, which limits the system output power and cannot meet the power requirement of more than 3KW; in addition, because the filter inductance design uses a single inductance, the filter is bulky, the heat dissipation is poor, and the electromagnetic interference is serious, which affects the filter filtering Effect

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