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    High resolution and low power consumption digital-analog converter
    2.
    发明公开
    High resolution and low power consumption digital-analog converter 有权
    Hochauflösender数字模拟Wandler mit geringem Leistungsverbrauch

    公开(公告)号：EP1458102A1

    公开(公告)日：2004-09-15

    申请号：EP03425160.3

    申请日：2003-03-14

    Applicant: STMicroelectronics S.r.l.

    Inventor： Confalonieri, Pierangelo ,  Nicollini, Germano ,  Martignone, Ricardo

    IPC: H03M1/68

    CPC classification number: H03M1/687 ,  H03M1/68 ,  H03M1/745 ,  H03M1/765

    Abstract: The described digital-analog converter comprises a first section (MSB) for converting the more significant bits of a digital code into a first voltage (Vin) of a multiplicity of discrete voltages that are integral multiples of a predetermined first voltage step (ΔV1), a second section (LSB) to convert the less significant bits of the digital code into a current, means for transforming the current (IL) of the second section (LSB) into a second voltage of a multiplicity of discrete voltages that are integral multiples of a second voltage step (ΔV2) equal to 1/2 L of the product of the first voltage step (ΔV1) multiplied by a predetermined coefficient, where L is the number of the less significant bits of the digital code to be converted, control means (DEC-9BIT; TRANSCOD-3BIT) of the first and the second section and summation means (OPA2) for obtaining an output voltage (Vout) that is the sum of the second voltage and the product of the first voltage multiplied by the predetermined coefficient. With a view to obtaining a low consumption, the summation means have resistive feedback means comprising a voltage divider (R3, R4) and the means for transforming the current (IL) into a second voltage comprise a conversion resistor (R4) that forms part of the voltage divider.

    Abstract translation: 所描述的数模转换器包括用于将数字代码的更高有效位转换为多个分立电压的第一电压（Vin）的第一部分（MSB），该多个离散电压是预定的第一电压步长（DELTA V1）的整数倍， ，用于将数字代码的较低有效位转换为电流的第二部分（LSB），用于将第二部分（LSB）的电流（IL）变换为多个整数倍的多个离散电压的第二电压的装置 第二电压步长（DELTA V2）等于第一电压步长（DELTA V1）乘以预定系数的乘积的1/2

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