Power-on reset (POR) circuit
AssigneeNXP B.V.
InventorsShubham Ajaykumar Khandelwal, Henricus Cornelis Johannes Büthker, Hendrik Johannes Bergveld
Life of this patent
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Abstract
Embodiments of power-on reset (POR) circuits are described. In one embodiment, a POR circuit includes a primary ladder circuit connected to a supply voltage and configured to generate a reference signal for a reset signal in response to the supply voltage and a secondary ladder circuit connected to the supply voltage and configured to bias the primary ladder circuit in response to the supply voltage.
Claims14
A power-on reset (POR) circuit, the POR circuit comprising:
- a primary ladder circuit coupled to a supply voltage and configured to generate a reference signal for a reset signal in response to the supply voltage;
- a secondary ladder circuit coupled to the supply voltage and configured to bias the primary ladder circuit in response to the supply voltage;
- a reference circuit coupled to the supply voltage;
- and
- a comparator coupled to the supply voltage;
- wherein the comparator is configured to compare an output voltage of the secondary ladder circuit with a first voltage in the reference circuit to generate a comparison result signal.
A power-on reset (POR) circuit, the POR circuit comprising:
- a primary ladder circuit coupled between a first supply voltage and a second supply voltage and configured to generate a reference signal for a reset signal in response to the first supply voltage and the second supply voltage;
- a secondary ladder circuit coupled between the first supply voltage and the second supply voltage and configured to bias the primary ladder circuit in response to at least one of the first supply voltage and the second supply voltage;
- a reference circuit coupled to the first and second supply voltages;
- a comparator coupled to the first and second supply voltages;
- and
- a buffer circuit coupled to the first and second supply voltages and between the comparator and the primary ladder circuit.
A power-on reset (POR) circuit, the POR circuit comprising:
- a primary ladder circuit coupled to a supply voltage and configured to generate a reference signal for a reset signal in response to the supply voltage reaching a first defined voltage trip level;
- and
- a secondary ladder circuit coupled to the supply voltage and configured to bias the primary ladder circuit in response to the supply voltage reaching a second defined voltage trip level.
Dependencies are inferred from the claim text.