High-speed, high-resolution and low-consumption...

Details High-speed, high-resolution and low-consumption... High-speed, high-resolution and low-consumption...

2005-05-24

2005-05-24

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C327S337000

Reexamination Certificate

active

06897801

ABSTRACT:
An A/D converter having capacitors of a first array of sampling capacitors weighted in binary code connected between a first common circuit node and an input terminal to be charged to an input voltage with respect to a ground of a signal to be converted, and in accordance with SAR technique are then selectively connected with two differential reference terminals, and at the same time capacitors of a second array equal to the first and all connected to a second node are selectively connected to ground and the lower differential voltage terminal. The two nodes are connected to the respective inputs of a comparator. A logic unit controls the connections of the capacitors of the two arrays in accordance with a predetermined timing program and as a function of the output of the comparator.

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