METHOD FOR GENERATING SIGNAL WAVEFORM AND SIGNAL WAVEFORM GENERATOR

摘要

PROBLEM TO BE SOLVED: To provide a signal waveform generator with small area and power consumption and not needing a high accuracy voltage source. ;SOLUTION: An offset adjustment circuit 24 is inserted between a reference voltage source 23 and adders 21, 22 which add a reference voltage respectively to an in-phase component signal and a quadrature component signal of a base band signal, the offset adjustment circuit 24 adjusts a reference voltage from the reference voltage source 23 to adjust the offset. Since the offset is adjusted by the circuit 24, the area and power consumption of a D/A converter 1 are decreased and an error of the reference voltage source 23 is corrected.;COPYRIGHT: (C)1998,JPO