Patent ID: 6864821
Filing Date: 2005-03-08
Classification: H03M

Abstract:
1. An analog-to-digital converter, comprising a resistor network for generating a plurality of reference voltages, the resistor network comprising a plurality of resistors connected in series to form a resistor string having a central node and two end nodes, resistors of a first string of the resistors having substantially equal resistances and being arranged between either one of the two end nodes and the central node, resistors of a second string of the resistors being arranged further from the central node than the resistors of the first string, resistors of the first string being refinements of a part of the resistors of the second string and the electrical resistances of the resistors of the second string being greater than the electrical resistances of the resistors of the first string, wherein equal numbers of the resistors are connected between the central node and each of the two end nodes, and wherein when an electrical potential is applied between the two end nodes the plurality of reference voltages are produced between adjacent resistors of the resistor string.