Patent ID: 9722597
Date: 2017-08-01
CPC Classifications: H03K

Claim:
1. An initialization signal generation device comprising: a power supply circuit configured to provide an external voltage when an initialization signal is enabled and provide an internal voltage when the initialization signal is disabled and internal circuits are initialized; and an initialization signal generator configured to sense the level of the voltage outputted from the power supply circuit and generate the initialization signal, wherein the initialization signal generator comprises a reference voltage generator configured to generate a reference voltage from the output of the power supply circuit, and an enable circuit configured to disable the initialization signal when the level of the reference voltage is equal to or greater than a predetermined level, wherein the power supply circuit comprises a first power supply circuit configured to provide one of the external voltage and the internal voltage to the reference voltage generator in response to the initialization signal, and a second power supply circuit configured to provide one of the external voltage and the internal voltage to the enable circuit in response to the initialization signal.