公开(公告)号：US4939518A

公开(公告)日：1990-07-03

申请号：US248374

申请日：1988-09-23

Applicant: Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

Inventor： Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

IPC: H03M1/12 ,  H03M1/20 ,  H03M1/36

CPC classification number: H03M1/206 ,  H03M1/1235 ,  H03M1/365

Abstract: In a cyclic averaging analog to digital converter, reference voltages having a plurality of levels, each of which is inputted to one of a plurality of comparators in a flash type analog to digital converter, are shifted cyclically by a small voltage, and the outputs of the flash type analog to digital converter are added for every shift cycle in order to obtain an output digital signal. The outputs of a voltage dividing circuit provide the reference voltages with N levels, the levels differing cyclically by a small voltage. The N reference voltages are divided into groups, each of which consists of M elements N/M, switches are provided each of which selects one of the reference voltages one after another for an associated group N/M reference voltages are thus selected by these switches and are supplied to the comparators.

Abstract translation: 在循环平均模数转换器中，具有多个电平的参考电压，每个电平被输入到闪存类型模数转换器中的多个比较器中的一个，周期性地被小电压移位，并且输出 为每个移位周期添加闪存型模数转换器，以获得输出数字信号。 分压电路的输出为N个电平提供参考电压，该电平周期性地受到小电压的限制。 N个参考电压被分成组，每个组由M个元件N / M组成，提供开关，每个选择一个参考电压一个接一个地为相关联的组N / M参考电压由这些开关选择 并提供给比较器。