Patent ID: 7253664
Filing Date: 2007-08-07
Classification: G09G,G11C,H03F

Abstract:
1. A compensating method for a reference voltage driving circuit having at least two resistors connected in series between two different potentials to create an output node for outputting a reference voltage, and an operation amplifier coupled to the output node, the compensating method comprising the steps of: storing the reference voltage in a first capacitor by turning on a second switch electrically coupled to the first capacitor and the input end of the operation amplifier; turning on a third switch, which is electrically coupled to a second capacitor and an input end of the operation amplifier, and a fourth switch, which is electrically coupled to the second switch and the output end of the operation amplifier, to store a potential difference between the input end and the output end of the operation amplifier in the second capacitor; and turning off the third switch and the fourth switch and turning on a first switch, which is electrically coupled to the first capacitor and the second capacitor, for providing the reference voltage stored in the first capacitor and the potential difference stored in the second capacitor to the operation amplifier to output a potential substantially identical to the reference voltage.