Power supply circuit for audio equivalent high-capacity capacitor

The invention discloses a power supply circuit for an audio equivalent high-capacity capacitor. The power supply circuit comprises a power supply input end, a current limiting circuit, an adjusting circuit, a constant current circuit, an active filter circuit, an error comparison amplifying circuit, a voltage reference circuit, a sampling circuit, a shunt voltage stabilizing circuit and a current output end. The MOS tube and the load are connected in parallel and are in a conducting state for a long time, extremely low dynamic internal resistance can be achieved and is 100 times lower than the dynamic internal resistance of a conventional voltage-stabilized power supply, and the voltage-stabilized power supply is very suitable for the field of large-dynamic music signal processing with violent current fluctuation. 本发明公开了一种用于音频等效大容量电容的电源电路，包括电源输入端、限流电路、调整电路、恒流电路、有源滤波电路、误差比较放大电路、电压基准电路、采样电路、分流稳压电路和电流输出端。本发明通过MOS管和负载并联且长期处于导通状态，可以实现极低的动态内阻，比常规的稳压电源的动态内阻低100倍以上，非常适合大动态、电流剧烈波动的音乐信号处理领域。