Patent ID: 9331687
Filing Date: 2016-05-03
CPC Classification: H03K

Claim Text:
1. A power-up circuit of a semiconductor apparatus, comprising: a voltage division portion configured to generate a first division voltage, which is a fraction of a first external power, and a second division voltage, which is a fraction of a second external power voltage, obtained by voltage division based on a first resistance ratio and a second resistance ratio, respectively; a first comparison portion configured to use the first external power voltage as a power supply voltage, and to generate a first comparison signal by comparing the first division voltage with the second division voltage; a second comparison portion configured to use the second external power voltage as a power supply voltage, and to generate a second comparison signal by comparing the first division voltage with the second division voltage; and a power-up signal generation portion configured to generate a power-up signal in response to the first comparison signal and the second comparison signal.