Patent ID: 6469551
Filing Date: 2002-10-22
Classification: H03K

Abstract:
A starting circuit which operates by receiving power from high potential and low potential power supplies, comprising;a starting signal generation circuit that includes a transistor having a threshold voltage within a predetermined range, wherein the transistor receives a control voltage and produces a starting signal from the time when the high potential power supply voltage starts rising to the time when the control voltage rises to the transistor threshold voltage; a control voltage generation circuit for dividing the voltage of the high and low potential power supplies and generating the control voltage; a correction circuit, including a plurality of switching elements, connected between the gate of the transistor and the control voltage generation circuit, for adjusting the control voltage in accordance with the threshold voltage of the transistor; and a waveform shaping circuit, connected to the transistor, for waveform-shaping the starting signal from the transistor and generates a waveform-shaped starting signal.