Patent ID: 8941421
Filing Date: 2015-01-27
Classification: H03K,H03L

Abstract:
1. A semiconductor device comprising: a power supply circuit that generates an internal power supply voltage based on an external power supply voltage; a reference voltage generation circuit that generates a reference voltage based on the external power supply voltage; an internal circuit that operates by the internal power supply voltage; and a power-on reset circuit that outputs a reset signal to the internal circuit, wherein the power-on reset circuit includes: a first comparison circuit that generates a first comparison signal; a second comparison circuit that generates a second comparison signal; and an output circuit that receives the first and second comparison signals as input signals, and generates the reset signal, wherein the first comparison circuit inactivates the first comparison signal when the external power supply voltage or a voltage proportional thereto exceeds the reference voltage, the second comparison circuit inactivates the second comparison signal when the internal power supply voltage or a voltage proportional thereto exceeds the reference voltage, the output circuit activates the reset signal when at least one of the input signals is activated.