Power supply detection device and method
AssigneeTellabs Bedford, Inc.
InventorBrian J. Berard
Life of this patent
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Abstract
A power supply detection circuit monitors an input voltage and generates a magnitude signal representative of a supply voltage magnitude. Timing signals are generated relative to a transient condition associated with connection to an input voltage. A data store receives timing signals and stores the magnitude signal at a timing interval so that the stored magnitude signal is representative of a predetermined power supply magnitude. The stored magnitude signal is used to automatically configure power protection circuitry and monitoring circuitry.
Claims22
A power circuit, comprising:
- a power supply detection circuit, including
- an input voltage magnitude detector circuit configured to receive a first supply voltage from a power supply input and generate a magnitude signal representative of the magnitude of the first supply voltage;
- a timing signal generation circuit configured to generate timing signals that are relative to a transient condition associated with the first supply voltage upon connection to the power supply input;
- and
- a data store circuit connected to the input voltage magnitude detector circuit and the timing signal generation circuit and configured to store the magnitude signal upon receiving a first timing signal from the timing signal generation circuit;
- and
- a power supply circuit connected to the power supply detection circuit and configured to operate in one of a plurality of magnitude modes, the magnitude modes dependent on the value of the magnitude signal.
A power supply detection device, comprising:
- an input voltage magnitude detector circuit configured to receive a first supply voltage from a power supply input and generate a magnitude signal representative of the magnitude of the first supply voltage;
- a timing signal generation circuit configured to generate timing signals that are proportional to a transient condition associated with the first supply voltage upon connection to the power supply input;
- and
- a memory circuit connected to the timing signal generation circuit and the input voltage magnitude detector circuit and configured to be enabled upon receiving a first timing signal from the timing signal generation circuit and to store the magnitude signal upon receiving a second timing signal from the timing signal generation circuit;
- wherein the magnitude signal is representative of a predetermined power supply magnitude.
A power processing method, comprising:
- receiving a first supply voltage from a power supply input;
- generating a magnitude signal representative of the magnitude of the first supply voltage;
- generating timing signals that are proportional to a transient condition associated with the first supply voltage upon receiving the first supply voltage;
- selectively enabling a memory circuit by a first generated timing signal;
- selectively storing the magnitude signal according to a second generated timing signal;
- wherein the timing signals are generated at timing intervals so that the stored magnitude signal is representative of a predetermined power supply magnitude.
A power processing circuit, comprising:
- means for receiving a first supply voltage from a power supply input;
- means for generating a magnitude signal representative of the magnitude of the first supply voltage;
- means generating timing signals that are proportional to a transient condition associated with the first supply voltage upon receiving the first supply voltage;
- means for selectively storing the magnitude signal;
- wherein the timing signals are generated at timing intervals so that the stored magnitude signal is representative of a predetermined power supply magnitude.
Dependencies are inferred from the claim text.