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    • 4. 发明授权
    • Process for compensating component tolerances in analog-digital
converters
    • 模数转换器补偿元件公差的过程
    • US5654708A
    • 1997-08-05
    • US535119
    • 1995-10-26
    • Eberhard BoehlArnd GangeiWilfried Tenten
    • Eberhard BoehlArnd GangeiWilfried Tenten
    • H03M1/10H03M1/46H03M1/80
    • H03M1/1033H03M1/468H03M1/804
    • A method for the compensation of component tolerances of a number of similar components, in particular capacitors in analog-to-digital converters which are connected to a common line, and whose electric value is in each case halved from component to component, the component with the smallest value being present twice. In this method, a first potential is at first applied to at least one of the components and a second potential is applied to the remaining components with lower values. A comparator then checks whether on the common line the mid-potential between the two potentials is present. There is then applied to a correction component (which is in addition connected to the common line) a variable correction voltage which is adjusted until the comparator determines the mid-potential on the common line. The determined correction voltage is finally stored as a correction value. As a result, each of these components can be adjusted individually and tolerance errors can be equalized, individual recalibrations being possible in each case which interrupt the converter operation of the analog-to-digital converter only for a very brief period. The precision and linearity of an analog-to-digital converter which uses a capacitor array adjusted in this way are very high.
    • PCT No.PCT / DE94 / 00408 Sec。 371 1995年10月26日第 102(e)日期1995年10月26日PCT 1994年4月13日PCT PCT。 出版物WO94 / 26034 日期1994年11月10日一种用于补偿多个类似部件的元件公差的方法,特别是连接到公共线的模拟数字转换器中的电容器,并且其电气值在每种情况下从组件到组件 组件,具有最小值的组件存在两次。 在该方法中,首先将第一电位施加到至少一个部件,并且将第二电位施加到具有较低值的剩余部件。 比较器然后检查在公共线上是否存在两个电位之间的中间电位。 然后施加到校正分量(其另外连接到公共线路)上的可变校正电压,直到比较器确定公共线路上的中间电位为止。 确定的校正电压最终存储为校正值。 因此,可以单独调整这些组件中的每一个,并且可以均衡误差,在每一种情况下可以进行单独的重新校准,这样可以在非常短的时间内中断模数转换器的转换器工作。 使用以这种方式调节的电容器阵列的模拟 - 数字转换器的精度和线性度非常高。