Patent ID: 6548994
Filing Date: 2003-04-15
Classification: G05F,Y10S

Abstract:
A reference voltage generator comprising:a voltage bias unit having a plurality of resistors and a first group of transistors serially connected between a power supply voltage node and a ground voltage node, and a preliminary reference voltage node connected to one of the plurality of resistors or transistors to produce a preliminary reference voltage; a voltage controller connected between the preliminary reference voltage node and the ground voltage node to adjust the preliminary reference voltage; a temperature compensator having a second group of transistors serially connected between the preliminary reference voltage node and a reference voltage node to compensate for temperature variation and produce a reference voltage; and a voltage compensator having a third group of transistors serially connected between the reference voltage node and the ground voltage node for controlling the reference voltage, and fuses for selectively short-circuiting at least two of the third group of transistors to vary the reference voltage.