Patent ID: 6215428
Filing Date: 2001-04-10
Classification: H03M

Abstract:
A compensated analog-to-digital converter system, comprising:an analog-to-digital converter module, of a type which relies on scaled capacitors to determine an output value;an array of scaled capacitors said array comprising a plurality of capacitors, a common line connected commonly to one end of each of the capacitors, a plurality of switched connections, each connected to a second end of each of the capacitors, and switching the second end of said each capacitors between a first potential and a second potential which is different than the first potential;at least one of said first and second potentials being different on a first of said capacitors than it is on a second of said capacitors;wherein said first potential is a voltage, said second potential is ground, and a first voltage of the first potential that is connected to the first capacitor is different than a second voltage of a first potential which is connected to the second capacitor; anda value memory, storing first and second correction values for said first and second capacitors, a first programmable voltage-producing element, receiving said first correction value and responsively producing said first potential based on said first correction value, and a second programmable voltage-producing element, receiving said second correction value and responsively producing said first potential to the second capacitor based on said second correction value.