Patent ID: 6960932
Filing Date: 2005-11-01
Classification: G05F

Abstract:
1. An apparatus to correct a reference voltage (Vref) of a digital device to input/output digital data, comprising: a Vref setup selecting part selecting a correction of the Vref; a Vref adjusting circuit adjusting the Vref of the digital device; and a Vref control storing part storing a Vref control program to change setup of the Vref adjusting circuit to vary the Vref output from the Vref adjusting circuit to be varied, detecting a transmission state of the digital data of the digital device, determining an optimum setup of the Vref adjusting circuit to allow error bits of the digital data to be minimized, and setting up the Vref adjusting circuit according to selection of the Vref correction through the Vref setup selecting part.