摘要
给出了一种低频功率放大器的设计制作过程,包括电压放大电路、FPGA控制的显示电路、带阻滤波器等部分.实验显示,当输入电压有效值为5mV的正弦信号时,在8Ω负载上的输出功率可达5W以上,输出波形无明显失真,输出噪声电压有效值不超过5mV,通频带范围为10Hz～50kHz.?基于FPGA编程控制,能够测量并LCD显示输出功率、直流电源的供给功率和整机效率.
The design of a kind of low-frequency power amplifier was given, including a voltage amplification circuit, a display circuit based on FPGA, and a BEF filter. The experiments show that when the input voltage is 5 mV RMS, the output power is up to 5 W without significant distortion on an 8 Ωload. The noise does not exceed 5mV and the pass band range is 10 Hz-50 kHz. The output power, the supply power and the efficiency could be measured and displayed on LCD based on FPGA.
出处
《苏州市职业大学学报》
2010年第1期41-43,共3页
Journal of Suzhou Vocational University
