START-UP CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a start-up circuit that can generate an optimum start-up signal for each chip corresponding to dispersion in a characteristic of TRs due to variations in the manufacture process. SOLUTION: In the start-up circuit 11, a 1st MOS transistor(TR) TN1 is turned on/off in a prescribed timing at a control voltage Vn, based on an external power supply until the external power supply reaches a usual operating voltage after rising of the external power supply, and the circuit 11 generates a start-up signal(STTZ), based on the on/off. The start-up circuit 11 is provided with a correction circuit 13. The correction circuit 13 corrects the control voltage Vn in response to dispersion in a threshold voltage of the 1st MOS TR TN1.