Patent ID: 7242339
Filing Date: 2007-07-10
Classification: H03K

Abstract:
1. A reference generator for generating a programmable reference voltage comprising: a series connection of a number N resistors forming N+1 nodes; a plurality of first electronic switches each configured to couple a first voltage potential to a selected first node of the N+1 nodes in response to a corresponding one of a plurality of first control signals; a plurality of second electronic switches each configured to couple a second voltage potential to a selected second node of the N+1 nodes in response to a corresponding one of a plurality of second control signals; and an output coupled to one of the N+1 nodes between the selected first node and the selected second node thereby generating the programmable reference voltage at the output, wherein a resistance between the selected first node and selected second node remains substantially a constant value when the programmable reference voltage at the output is varied in response to the first and second control signals.