Power-on reset circuit
AssigneeKeystone Semiconductor Corp.
InventorChao-Sung Lin
Life of this patent
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Abstract
A power-on reset circuit includes a power confirmation module and a reset signal generator. The power confirmation module receives a supply voltage and generates a reference voltage and a comparison voltage. A magnitude of the reference voltage rises a first time delay after receipt of the supply voltage, and a magnitude of the comparison voltage rises a second time delay after receipt of the supply voltage. The second time delay is greater than the first time delay. The power confirmation module further outputs a confirmation signal based on the reference voltage and the comparison voltage. The reset signal generator outputs a reset signal according to the confirmation signal.
Claims15
A power-on reset circuit comprising:
- a power confirmation module disposed to receive a supply voltage and configured to generate a reference voltage and a comparison voltage, a magnitude of the reference voltage rising according to a magnitude of the supply voltage a first time delay after receipt of the supply voltage, a magnitude of the comparison voltage rising according to the magnitude of the supply voltage a second time delay after receipt of the supply voltage, the second time delay being greater than the first time delay, said power confirmation module being further configured to output a confirmation signal based on the reference voltage and the comparison voltage;
- and
- a reset signal generator coupled to said power confirmation module to receive the confirmation signal therefrom and configured to output a reset signal according to the confirmation signal.
Dependencies are inferred from the claim text.