The invention discloses an ultra-low frequency active loudspeaker with built-in speed feedback. It includes speakers and audio power amplifier, the speaker after the series inductor and the first resistor, the resistor is connected to the other end, the first bridge output end is arranged between the speaker and the inductor; then there is a need for simulation, signal equivalent circuit between the first output end of the bridge and the speaker series, the signal equivalent circuit is used to generate virtual motional impedance. Ultra low frequency active loudspeaker of the invention is used to improve the performance of ultra low frequency loudspeaker very effective speed feedback technology, and the speed feedback technology is optimized, the inductance compensation sampling, while increasing the signal equivalent circuit, in order to improve the quality of the feedback signal, and the effect of further optimization of ultra low frequency active speaker. Another result of optimization is that speed feedback technology is more mature and applied to mass production of products.
【技术实现步骤摘要】
【技术保护点】
一种内置速度反馈的超低频有源扬声器，包括扬声器及声频功率放大器，其特征在于：该扬声器后串联电感和第一电阻，该电阻另一端接地，所述扬声器与电感之间设有第一电桥输出端；所述扬声器与声频功率放大器之间的输入线路上设有一支电路，所述支电路包括串联的第二电阻和第三电阻第三电阻另一端接地，第二电阻和第三电阻之间设有第二电桥输出端，第一电桥输出端和第二电桥输出端两点连接到声频功率放大器的差分输入进行反馈，为了仿真需要，所述第一电桥输出端与扬声器之间串接有一信号等效电路，该信号等效电路用于产生虚拟的动生阻抗。
【技术特征摘要】
【专利技术属性】
技术研发人员：祁家堃，
申请(专利权)人：台山市恒东音响科技有限公司，
类型：发明
国别省市：44
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