Method and apparatus for a data converter with a single operational
amplifier
    1.
    发明授权
    Method and apparatus for a data converter with a single operational amplifier 失效
    具有单个运算放大器的数据转换器的方法和装置

    公开(公告)号:US5633640A

    公开(公告)日:1997-05-27

    申请号:US349592

    申请日:1994-12-05

    摘要: A data converter (10) includes an analog input element (12), an operational amplifier (14), a first reference input element (18), a second reference input element (22), and a control element (34). The analog input element (12) operably couples the analog signal to a first input (13) of the operational amplifier (14). The first and second reference input elements (18 & 22) respectively couple a first signal (16) and a second signal (22) to a first input of the operational amplifier (14). The control element (34) generates the control signal based on an output of the operational amplifier (14) to force the first input node (13) to be equivalent to the second input node (15) of the operational amplifier (14). The data converter (10) also includes an analog-to-digital converter (26) that allows the circuit to perform a sigma-delta conversion.

    摘要翻译: 数据转换器(10)包括模拟输入元件(12),运算放大器(14),第一参考输入元件(18),第二参考输入元件(22)和控制元件(34)。 模拟输入元件(12)可操作地将模拟信号耦合到运算放大器(14)的第一输入端(13)。 第一和第二参考输入元件(18和22)分别将第一信号(16)和第二信号(22)耦合到运算放大器(14)的第一输入端。 控制元件(34)基于运算放大器(14)的输出产生控制信号,以迫使第一输入节点(13)等效于运算放大器(14)的第二输入节点(15)。 数据转换器(10)还包括允许电路执行Σ-Δ转换的模拟 - 数字转换器(26)。