Dynamically adjustable signal detector
AssigneeAltera Corporation
InventorsWilson Wong, Sergey Shumarayev
Life of this patent
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Abstract
A dynamically adjustable signal detector receives a differential input signal and outputs a signal indicative of whether a valid signal is being received based on dynamically adjustable threshold settings. The threshold settings can include differential voltage, peak power, average power, or other suitable settings, and can have a dynamically adjustable value for a selected threshold setting. The threshold settings and the value for a selected threshold setting can be set using control signals that are set by programmable logic resource circuitry, by soft intellectual property programmed into a programmable logic resource, by a processor, by circuitry external to a programmable logic resource, or by user input.
Claims19
1-29. (canceled)
Apparatus for determining when a differential input signal received from a transmitter is a valid signal, the apparatus comprising:
- a dynamically adjustable signal detector that receives as input the differential input signal and is operative to output a signal indicative of whether the differential input signal is a valid signal based on a first differential voltage and a second differential voltage;
- and
- control circuitry that receives as input at least one control signal and is operative to program new threshold values for at least one of the first differential voltage and the second differential voltage in the dynamically adjustable signal detector based on the at least one control signal.
A method for determining when a differential input signal received from a transmitter is a valid signal, the method comprising:
- receiving new threshold values for at least one of a first differential voltage and a second differential voltage;
- computing a difference between a positive terminal and a negative terminal of the differential input signal to produce a differential input voltage;
- comparing the differential input voltage to the new threshold values for the first differential voltage and/or the second differential voltage;
- and
- sending an output indicative of whether the differential input signal is valid in response to comparing the differential input voltage to the new threshold values.
Dependencies are inferred from the claim text.