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US 6,617,889 B1Granted
Signal amplitude comparator
AssigneeLSI Logic Corporation
InventorKenneth G. Richardson
Life of this patent
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AssigneeLSI Logic Corporation
InventorKenneth G. Richardson
Estimating the term…
A signal amplitude comparator which includes a first differential input circuit that is biased, is configured to receive an input voltage and is configured to generate a first output current that is a non-linear function of the input voltage, a second differential input circuit which is biased similarly to the first differential input circuit, is configured to receive a reference input voltage and is configured to generate a second output current that generally tracks process, temperature and supply variation, and a comparator which is connected to the first differential input circuit and the second differential input circuit and is configured to receive the first output current from the first differential input circuit and the second output current from the second differential input circuit. The comparator is configured to compare the first and second output currents and generate an output which indicates whether the input voltage exceeds a pre-determined threshold value.
A signal amplitude comparator configured to receive an input voltage and a reference input voltage and is configured to generate an output which indicates whether the input voltage exceeds a pre-determined threshold value, said signal amplitude comparator comprising a first differential input circuit that is biased, is configured to receive the input voltage, and is configured to generate a first output current that is a non-linear function of the input voltage, a second differential input circuit which is biased similarly to the first differential input circuit, is configured to receive the reference input voltage, and is configured to generate a second output current that generally tracks process, temperature and supply variation, and a comparator which is connected to the first differential input circuit and the second differential input circuit and is configured to receive the first output current from the first differential input circuit and the second output current from the second differential input circuit, said comparator configured to compare the first and second output currents and generate the output which indicates whether said input voltage exceeds the pre-determined threshold value.
A poly-phase signal amplitude comparator configured to receive a poly-phase input source and at least one reference input voltage and is configured to generate an output which indicates whether the amplitude of the poly-phase input source exceeds a pre-determined threshold value, said signal amplitude comparator comprising a first differential input circuit that is biased, is configured to receive a first input voltage, and is configured to generate a first output current that is a non-linear function of the first input voltage, a second differential input circuit which is biased similarly to the first differential input circuit, is configured to receive a second input voltage, and is configured to generate a second output current that is a non-linear function of the second input voltage, and a comparator which is connected to the first differential input circuit and the second differential input circuit and is configured to receive the first output current from the first differential input circuit, the second output current from the second differential input circuit, and the at least one reference input voltage, said comparator configured to compare the sum of first and second output currents with the at least one reference input voltage and generate the output which indicates whether the amplitude of the poly-phase input source exceeds the pre-determined threshold value.
A poly-phase signal amplitude comparator configured to receive a poly-phase input source and at least one reference input voltage and is configured to generate an output which indicates whether the amplitude of the poly-phase input source exceeds a pre-determined threshold value, said signal amplitude comparator comprising at least two differential input circuits that are biased, are configured to receive input voltages, and are configured to generate output currents that are a non-linear function of the input voltages, at least one reference circuit which is configured to receive the at least one reference input voltage and generate an output, and a comparator which is connected to the differential input circuits and the at least one reference circuit and is configured to receive the output currents from the differential input circuits and the output of the reference circuit, said comparator configured to compare the sum of the output currents with the output of the reference circuit and generate the output which indicates whether the amplitude of the poly-phase input source fixers the pre-determined threshold value.
Dependencies are inferred from the claim text.