Patent ID: 6417704
Filing Date: 2002-07-09
Classification: H03K

Abstract:
A power-on circuit in which resetting of a circuit designed to allow direct current to flow at the time of resetting is performed in a stable state without allowing a large current to flow in this circuit, comprising:a PON generating circuit generating and outputting a power-on signal representing an increasing voltage state following power source on; a ring oscillator arranged downstream of said PON generating circuit; a counter arranged downstream of said ring oscillator; and a selector arranged downstream of said ring oscillator in parallel with said counter; wherein for generating a plurality of one-shot pulses at the time of power on for use for circuit resetting, said ring oscillator generating said plural one-shot pulses, said counter and the selector are used, the number of the pulses generated by said ring oscillator being counted, and said selector distributing the one-shot pulses into n.