公开(公告)号：US5265039A

公开(公告)日：1993-11-23

申请号：US716752

申请日：1991-06-18

Applicant: Raul Curbelo ,  Warren R. Howell

Inventor： Raul Curbelo ,  Warren R. Howell

IPC: H03M1/20

CPC classification number: G01J3/45 ,  H03M1/201

Abstract: A technique for improving the resolution of an A/D converter (30). The input analog signal is sampled to generate an analog level and the analog level is held (20) for an interval. A dither signal (22) is superimposed (23) on the held level to generate a fluctuating voltage. This fluctuating voltage is then sampled (25) a plurality of at least N times, and N sampled values are communicated to the A/D converter (30) so that N digitized values are generated. These digitized values are averaged (32) to provide an output having a digitization error reduced by a factor of up to N.sup.1/2.

Abstract translation: 一种用于提高A / D转换器（30）的分辨率的技术。 输入模拟信号被采样以产生模拟电平，并且模拟电平保持（20）一段间隔。 抖动信号（22）在保持电平上叠加（23）以产生波动电压。 然后对该波动电压进行采样（25）多次至少N次，并且将N个采样值传送到A / D转换器（30），从而生成N个数字化值。 这些数字化值被平均（32），以提供数字化误差降低到N1 / 2的因子的输出。