Sequential comparison type AD converter and microcomputer

Details Sequential comparison type AD converter and microcomputer Sequential comparison type AD converter and microcomputer

2005-01-25

2005-01-25

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000, C341S150000

Reexamination Certificate

active

06847322

ABSTRACT:
A sequential comparison type AD converter comprising series resistors for generating at respective connection portions reference values to convert an analog value to an m-bit digital value; a comparator for sequentially comparing the analog value and one of the reference value and outputting a digital value; a plurality of capacitive elements for distributing any one of the reference values by capacitance ratio; and a control unit for switching a value compared to the analog value by the comparator from a reference value to a distribution value of the plurality of capacitive elements when the comparator outputs an m-bit digital value, wherein the analog value is converted to an (m+n) bit digital value.

REFERENCES:
patent: 6304203 (2001-10-01), Yamada

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