On-die receiver coupling capacitance testing
AssigneeXilinx, Inc.
InventorsNakul Narang, Hsung Jai Im, Kee Hian Tan
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Abstract
A method for testing on-die capacitors is provided. The method comprises transmitting, during a first time period, a first modulated testing signal from a first transmitter port of a transmitter to a first receiver port of a receiver along a first path of a differential signal, the first receiver port connected to a first on-die capacitor in the receiver along the first path; driving, during the first time period, a constant voltage on a second transmitter port of the transmitter to a second receiver port of the receiver along a second path of the differential signal comprising a second on-die capacitor; and determining whether the first on-die capacitor is functional, based on the first modulated testing signal.
Claims13
A method for testing on-die capacitors, the method comprising
- transmitting, during a first time period, a first modulated testing signal from a first transmitter port of a transmitter to a first receiver port of a receiver along a first path of a differential signal, the first receiver port connected to a first on-die capacitor in the receiver along the first path;
- driving, during the first time period, a constant voltage on a second transmitter port of the transmitter to a second receiver port of the receiver along a second path of the differential signal comprising a second on-die capacitor;
- and
- determining whether the first on-die capacitor is functional, based on the first modulated testing signal.
A communication system, comprising:
- a transmitter comprising a first transmitter port and a second transmitter port;
- a receiver comprising a first receiver port and a second receiver port;
- first and second signal paths forming a differential signal path that communicatively couples the transmitter and the receiver,
- wherein the transmitter is configured to:
- transmit, during a first time period, a first modulated testing signal from the first transmitter port to the first receiver port along the first path, the first receiver port connected to a first on-die capacitor in the receiver along the first path;
- drive, during the first time period, a constant voltage on the second transmitter port to the second receiver port along the second path;
- and
- determine whether the first on-die capacitor is functional, based on the first modulated testing signal.
Dependencies are inferred from the claim text.