Patent ID: 7265602
Filing Date: 2007-09-04
Classification: G09G

Abstract:
1. A voltage generating circuit comprising: a first resistor ladder having a plurality of taps for output of respective voltages; a first plurality of amplifiers with output stages, having respective first input terminals coupled to respective taps in the first resistor ladder; a second resistor ladder having a plurality of taps for output of respective voltages; a second plurality of amplifiers with output stages, having respective first input terminals coupled to respective taps in the second resistor ladder; a plurality of internal signal lines, a first plurality of switches connected between respective output stages of the first plurality of amplifiers and respective ones of the internal signal lines; a second plurality of switches connected between respective output stages of the second plurality of amplifiers and respective ones of the internal signal lines; a plurality of output terminals; and an output switching circuit connected between the internal signal lines and the output terminals.