Patent ID: 6642877
Filing Date: 2003-11-04
Classification: H03M

Abstract:
A method for forming a resistor circuit in a semiconductor material, comprising:connecting a first plurality of resistors in series between different fixed voltage potentials, the first plurality of resistors having a first end terminal and a second end terminal, and the resistors connected together at respective nodes therebetween; connecting a second plurality of resistors in series between different fixed voltage potentials, the second plurality of resistors having a first end terminal and a second end terminal, and the resistors of the second plurality connected together at respective nodes therebetween; switchably connecting one of a plurality of switches between a first node selected from one of the respective nodes of the first plurality of resistors and a second node selected from one of the respective nodes of the second plurality of resistors, respective nodes of the first and second plurality of resistors being of similar voltage before the first and second nodes are connected by the one of the plurality of switches, whereby effects of different values of the resistors due to semiconductor process variations are reduced; and connecting the first and second connected nodes to an output.