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Integratable switched-capacitor sigma-delta modulator

机译:积分式开关电容器Σ-Δ调制器

摘要

A switched-capacitor sigma-delta modulator includes at least one memory element, at least one comparator connected to the at least one memory element, and at least one integrator connected to the at least one comparator. The at least one integrator has a first input stage including a series circuit of a first switch, a first capacitor with two terminals and a second switch, a third switch for connecting one of the two terminals of the first capacitor to ground potential, and a fourth switch for connecting the other of the two terminals of the first capacitor to ground potential. The at least one integrator also has a second input stage connected parallel ot the first input stage including a series circuit of a fifth switch, a second capacitor having two terminals and a sixth switch, a seventh switch for connecting one of the two terminals of the second capacitor to ground potential, and an eighth switch for connecting the other of the two terminals of the second capacitor to ground potential. Only one integrator with high amplication which is disposed in an outer feedback loop of the sigma-delta modulator, may have the second input stage. The first and second capacitors and the switches of the first and second input stages may be substantially identically set up and the switches have various switching phases.
机译:一种开关电容器西格玛-德尔塔调制器,包括至少一个存储元件,连接到至少一个存储元件的至少一个比较器以及连接到至少一个比较器的至少一个积分器。该至少一个积分器具有第一输入级,该第一输入级包括第一开关,具有两个端子的第一电容器和第二开关的串联电路,用于将第一电容器的两个端子中的一个连接到地电位的第三开关,以及第四开关,用于将第一电容器的两个端子中的另一个连接到地电位。至少一个积分器还具有与第一输入级并联连接的第二输入级,该第二输入级包括第五开关的串联电路,具有两个端子的第二电容器和第六开关,用于连接第一输入级的两个端子中的一个的第七开关。第二电容器接地电位,以及第八开关,用于将第二电容器的两个端子中的另一个连接到地电位。设置在sigma-delta调制器的外部反馈环路中的只有一个具有高放大倍数的积分器可以具有第二输入级。第一和第二输入级的第一和第二电容器以及开关可以基本相同地设置,并且开关具有各种开关相位。

著录项

  • 公开/公告号US5057839A

    专利类型

  • 公开/公告日1991-10-15

    原文格式PDF

  • 申请/专利权人 SIEMENS AKTIENGESELLSCHAFT;

    申请/专利号US19900520521

  • 发明设计人 RUDOLF KOCH;

    申请日1990-05-07

  • 分类号H03M3/02;

  • 国家 US

  • 入库时间 2022-08-22 05:45:43

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