US 8,300,684 B2Granted

Real-time eye monitor for statistical filter parameter calibration

AssigneeLSI Corporation

InventorsMohammad Mobin, Ye Liu, Kenneth Paist, Mark Trafford

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Abstract

In described embodiments, filter parameters for a filter applied to a signal in, for example, a Serializer/De-serializer (SerDes) receiver and/or transmitter are generated based on real-time monitoring of a data eye. The real-time eye monitor monitors data eye characteristics of the signal present in a data path, the data path applying the filter to the signal. The eye monitor generates eye statistics from the monitored data eye characteristics and an adaptive controller generates a set of parameters for the filter of the data path for statistical calibration of the data eye, wherein the eye monitor continuously monitors the data eye and the adaptive controller continuously generates the set of parameters based on the eye statistics.

Claims18

Dependent claims

Apparatus for generating filter parameters for a filter applied to a signal, the apparatus comprising:

a real-time eye monitor configured to i) monitor data eye characteristics of the signal present in a data path, the data path applying the filter to the signal, and ii) generate eye statistics from the monitored data eye characteristics, the eye monitor monitoring the data with a sampler array comprising a top sampler, a data sampler, and a bottom sampler;
an adaptive controller configured to generate a set of parameters for the filter of the data path for statistical calibration of the data eye;
wherein the eye monitor continuously monitors the data eye and the adaptive controller continuously generates the set of parameters based on the eye statistics,
wherein one of the eye characteristics includes an error in vertical height of the data eye based on a sampled top edge, a sampled bottom edge, and a sampled data value at a center of the data eye, and
wherein the apparatus further comprises a voltage threshold controller configured to set the sampling level of the top sampler, the data sampler, and the bottom sampler in response to the adaptive controller.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/493,435Filed 29 Jun 2009
Published: US 2010/0329322 A130 Dec 2010
Granted: 30 Oct 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 27/01
Modulated-carrier systems: equalisers
H04L 25/03057
Adaptive, i.e. capable of adjustment during data reception: with a recursive structure
H04L 25/03082
Adaptive, i.e. capable of adjustment during data reception: theoretical aspects of adaptive time domain methods
H04L 25/03343
Arrangements for removing intersymbol interference: arrangements at the transmitter end