BIAS VOLTAGE GENERATION CIRCUIT AND DRIVER INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To easily generate a corrected variable bias voltage by a comparatively simple circuit configuration. Ž

SOLUTION: A bias voltage generation circuit 50 comprises: a register 51 which holds a variable n-bit register value RV set externally; a nonvolatile memory 52 for storing n-bit correction values CV0 to CV7 for correcting the data value RV; A computing circuit 60 which computes the n-bit register value RV and the n-bit correction values CV0 to CV7 and outputs n-bit arithmetic operation results S0 to S7; a resistance voltage division circuit 70 divides reference voltage VRS into 2nvoltages and outputs 2nlevels of divided voltages; and a selection circuit 80 which selects one level of a divided voltage DV from the 2nlevels of divided voltages DV0 to DV255 respectively on the basis of the n-bit computing results S0 to S7, and outputs a bias voltage BV having a variation over 2nlevels. Ž

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