关键词: 正弦信号发生器, 神经网络, 现场可编程门阵列（FPGA）, 直接数字频率合成

Abstract: Aiming at the problem of phase truncation error in direct digital frequency synthesis technology when designing the sinusoidal signal generator, this paper proposes a new design scheme of high frequency sinusoidal signal generator, which is based on neural network technology and uses FPGA as the hardware core. This scheme effectively solves the problem above. This paper expounds the working principle, circuit structure, design ideas and design method. Through design and simulation test, the master clock frequency of the system can reach 95 MHz and the system does not occupy storage space. When the output sinusoidal signal is 2.5 MHz, the spurious suppression of the output signal is 80 dB. These show that the scheme has low resource occupancy rate, no phase truncation, small spurious output signal and high output frequency.

Key words: sinusoidal signal generator, neural network, Field Programmable Gate Array（FPGA）, direct digital frequency synthesis