Patent ID: 6512410
Filing Date: 2003-01-28
Classification: G05F

Abstract:
A dual-level substrate voltage generator, comprising:a first voltage generating means for generating a first substrate voltage; a first voltage detecting means for detecting a level of the first substrate voltage fed thereto from the first voltage generating means, and outputting a first substrate voltage control signal, which is used in providing the first substrate voltage at an optimum level; a second voltage generating means for generating a second substrate voltage having a level lower than that of the first substrate voltage; a second voltage detecting means for detecting a level of the second substrate voltage fed thereto from the second voltage generating means, and outputting a second substrate voltage control signal, which is used in providing the second substrate voltage at the optimum level, to the second voltage generating means; and a switching means for performing a switching operation to divide a charge between the first and second substrate voltages.