Crosstalk cancellation in a receiver
AssigneeCadence Design Systems, Inc.
InventorsH Md Shuaeb Fazeel, Sachin Ramesh Gugwad
Life of this patent
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Abstract
Embodiments relate to systems, methods, and computer-readable media to enable design and creation of crosstalk cancellation circuitry for a receiver (e.g. an AC coupled DDR5 receiver). One embodiment is a receiver apparatus with crosstalk victim and aggressors lines. The cancellation circuitry involves an amplifier and buffering circuitry to provide inductive and capacitive crosstalk cancellation voltages. Some embodiments can additionally involve circuitry for autozeroing modes for AC coupled receiver lines.
Claims20
A receiver apparatus for a memory device, the receiver apparatus comprising:
- a crosstalk victim line configured for communications between receiver circuitry and memory;
- a crosstalk aggressor line configured for communications between the receiver circuitry and the memory;
- an amplifier comprising a first amplifier input coupled to the crosstalk victim line, a second amplifier input coupled to a reference voltage, and an amplifier output;
- a buffering circuit comprising a crosstalk amplifier, a crosstalk capacitor coupled between the crosstalk aggressor line and a crosstalk amplifier input of the crosstalk amplifier, and a crosstalk resistor coupled between a crosstalk amplifier output and the crosstalk amplifier input, wherein the crosstalk amplifier output is coupled to the first amplifier input.
A memory interface system, comprising:
- receiver circuitry configured for data communications between a memory and a host via at least a crosstalk victim line and a crosstalk aggressor line;
- and
- crosstalk cancellation circuitry coupled to the receiver circuitry, the crosstalk cancellation circuitry comprising:
- an amplifier comprising a first amplifier input coupled to the crosstalk victim line, a second amplifier input coupled to a reference voltage, and an amplifier output coupled to the receiver circuitry;
- a buffering circuit comprising a crosstalk amplifier, a crosstalk capacitor coupled between the crosstalk aggressor line and a crosstalk amplifier input of the crosstalk amplifier, and a crosstalk resistor coupled between a crosstalk amplifier output and the crosstalk amplifier input, wherein the crosstalk amplifier output is coupled to the first amplifier input and the second amplifier input.
A method of configuring a component arrangement in design for an integrated circuit, the method comprising:
- defining a plurality of values for the integrated circuit, the plurality of values comprising at least a characteristic impedance for channels of the integrated circuit;
- configuring a crosstalk victim line for communications between receiver circuitry and a memory;
- configuring a crosstalk aggressor line for communications between the receiver circuitry and the memory;
- configuring crosstalk cancellation circuitry comprising:
- an amplifier comprising a first amplifier input coupled to the crosstalk victim line, a second amplifier input coupled to a reference, and an amplifier output;
- and
- a buffering circuit comprising a crosstalk amplifier, a crosstalk capacitor coupled between the crosstalk aggressor line and a crosstalk amplifier input of the crosstalk amplifier, and a crosstalk resistor coupled between a crosstalk amplifier output and the crosstalk amplifier input, wherein the crosstalk amplifier output is coupled to the first amplifier input;
- defining a crosstalk cancellation circuitry output.
Dependencies are inferred from the claim text.