In recent issues, Analog Dialogue has dealt extensively with topics in shielding and grounding,[1,2] emphasizing the techniques needed to protect the integrity and precision of analog signals in the dc and audio-frequency domain from interfering signals, whether at line frequency or at much higher frequencies. To complement those articles, we suggest here the elements of good practice for high-resolution “video speed” converters, i.e., converters of 10-bit or greater resolution, operating at word rates above 1 MHz; R. y/ N; X& D; N
----------------------------------------- ; d& v' l5 w* m
1. Alan Rich, “Understanding Interference-Type Noise,”Analog Dialogue 16-3, 1982, pages 16-19 Y8 o" h% r5 k& Z/ Z
2. Alan Rich, “Shielding and Guarding,” Analog Dialogue 17-1, 1983, pages 8-13. # y3 d* S4 H7 v0 N1 z( P / L2 R/ B5 T" |" k1 T) G近几期的Analog Dialogue 着重对屏蔽和接地问题进行了广泛的探讨,强调这些技术在直流和音频范围内对保证模拟信号的完整,精确,免受工频或更高频率的干扰方面将起到作用。这里我们建议将本文中有益于高分辨率“视频”转换器,即10位或10位以上精度,字节速率在1MHz以上的方法作为对已发表文章的补充。 : F& p u( T# f f1 q7 h) u