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US 7,064,585 B2Granted
Detecting peak signals
AssigneeIntel Corporation
InventorKevin W. Glass
Life of this patent
Estimating the term…
Abstract
In one embodiment, the present invention includes an apparatus having a threshold detector with a current comparator to determine if an input signal exceeds a threshold. The input signal may be obtained from a received optical signal and may be compared to a reference signal obtained from a hierarchical Schmitt trigger, in certain embodiments.
Claims25
An apparatus comprising:
- a threshold detector having a first current comparator to determine if an input signal exceeds a threshold, the threshold detector including an absolute value detector coupled to receive the input signal from an amplifier stage;
- a second current comparator coupled to receive an output of the first current comparator;
- a current source to provide a source current to the absolute value detector;
- a reference circuit to generate a tracking reference signal;
- and
- a feedback circuit to generate a feedback signal to control the current source, the feedback signal based upon the tracking reference signal and the output of the absolute value detector.
3 more elements
A method comprising:
- determining an absolute value of a differential input;
- comparing the absolute value to a reference signal using a current comparator;
- and
- providing a direct current feedback signal based on the absolute value and the reference signal to a current source.
1 more element
An apparatus comprising:
- an absolute value detector to receive a differential input;
- a cascode current comparator coupled to an output of the absolute value detector;
- a latch coupled to the cascode current comparator;
- and
- a differential current comparator coupled between the cascode current comparator and the latch.
2 more elements
An apparatus comprising:
- an absolute value detector to receive a differential input;
- a cascode current comparator coupled to an output of the absolute value detector;
- a current source to provide a source current to the absolute value detector;
- a reference circuit coupled to receive the source current and provide a tracking reference signal to the cascode current comparator;
- a feedback circuit coupled to receive the output of the absolute value detector and the tracking reference signal and to generate a feedback signal to be provided to the current source;
- and
- a latch coupled to the cascode current comparator.
4 more elements
A system comprising:
- an absolute value detector to receive an input signal;
- a first current comparator coupled to receive an output of the absolute value detector, the first comparator to also receive a reference signal;
- and
- a feedback circuit to receive the output of the absolute value detector and the reference signal and to generate a reference signal for a current source for the absolute value detector.
1 more element
Dependencies are inferred from the claim text.