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    • 3. 发明授权
    • A/D converter
    • A / D转换器
    • US07724166B2
    • 2010-05-25
    • US12253071
    • 2008-10-16
    • Naoyuki Abe
    • Naoyuki Abe
    • H03M1/00
    • G11C27/026H03M1/002H03M1/1245
    • An apparatus is provided. The apparatus comprises a sample and hold circuit, a converter, and an adjustable current circuit. The sample and hold circuit is adapted to receive an analog input signal and to output an amplified signal. The converter is coupled to the sample and hold circuit and that converts the amplified signal to a digital signal. The controller is coupled to the converter and that receives the digital signal. The controller includes a plurality of voltage ranges, wherein each voltage range is associated with a current value, and the controller compares the digital signal to at least one of the voltage ranges to output at least one of the current values. The adjustable current circuit is coupled to the sample and hold amplifier and to the controller so that the adjustable current circuit provides a generally constant operating current that corresponds to the current value output from the controller.
    • 提供了一种装置。 该装置包括采样和保持电路,转换器和可调电流电路。 采样和保持电路适于接收模拟输入信号并输出​​放大的信号。 转换器耦合到采样和保持电路,并将放大的信号转换成数字信号。 控制器耦合到转换器并且接收数字信号。 控制器包括多个电压范围,其中每个电压范围与电流值相关联,并且控制器将数字信号与至少一个电压范围进行比较以输出至少一个电流值。 可调电流电路耦合到采样和保持放大器和控制器,使得可调电流电路提供对应于从控制器输出的电流值的大致恒定的工作电流。