【摘要】 本文介绍了用于观测太阳磁场的天文望远镜系统的高速高精度局部级联式多阈值A/D转换器。文章着重讨论了,为实现高速、高精度所采用的技术要点,并提出了研制高速高精度A/D转换器所必须考虑的有关问题。 我们所研制的A/D转换器,分辨率为1mV,相对误差<0.025％,字长12位,前面接采样保持电路后,速度为10万次/秒。更多还原

【Abstract】 A high-speed high-accuracy partially-cascaded A/D converter is developed, which is used with the telescope for observing the solar magnetic field. The major techniques employed for realizing high speed and high accuracy are discussed, and some related factors are also considered.For this converter, the word length is 12bit, the resolution power is 1 mV, the relative accuracy less than 0.025%, and the rate is 100,000 sec-1 when a sampling hold circuit is cascaded in front of it.更多还原