Patent ID: 6184720
Filing Date: 2001-02-06
Classification: G01R,G05F

Abstract:
An internal voltage generating circuit in semiconductor device for converting an external power voltage applied from the semiconductor device into an internal voltage for driving an internal circuit, comprising:a plurality of test power voltage pads, each of which can be selectively applied with the external power voltage and a ground voltage during test;a fuse programmable control signal generator coupled to the plurality of test power voltage pads, for generating a control signal according to the signals applied to the plurality of said test power voltage pads during test, and for generating the control signal according to fuse-programmed state after at least one fuse included therein is programmed;a reference voltage generator for receiving the external power voltage so as to produce a reference voltage having a predetermined level;a voltage trimming unit for trimming the reference voltage in accordance with the output of the fuse programmable control signal generator; anda reference voltage amplifier coupled between said reference voltage generator and the voltage level trimming unit, for amplifying the reference voltage and producing the amplified voltage to said voltage level trimming unit.