关键词: 直接数字频率合成, 单粒子翻转, 三模冗余, 自纠错, 抗辐照

Abstract: Direct digital frequency synthesizer(DDS) is widely used as a key component in the aerospace industry. The chip is susceptible to high-energy radiation particles in a wide space. The single event upset (SEU) effect is a very common radiation effect, which will lead to abnormal or even failure of the circuit. This requires DDS chip to have very strong anti-irradiation properties. A register based on three-mode redundant structure and self-correcting function is proposed, which is applied to the circuit design of DDS, and the digital circuit part of the chip is inserted into the three-mode redundant structure, and the redundant structure is used to remove the fault. The influence of the circuit on the function of the entire DDS chip makes the anti-irradiation capability of the DDS chip effectively improved.

Key words: direct digital frequency synthesizer, single event upset, triple-mode redundancy, self-correcting