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US 10,651,848 B2Granted
Integrated circuit with configurable on-die termination
AssigneeRambus Inc.
InventorHuy Nguyen
Life of this patent
Estimating the term…
Abstract
Described are integrated-circuit die with differential receivers, the inputs of which are coupled to external signal pads. Termination legs coupled to the signal pads support multiple termination topologies. These termination legs can support adjustable impedances, capacitances, or both, which may be controlled using an integrated memory.
Claims19
An integrated-circuit (IC) die programmable to support a first termination topology and a second termination topology, the IC die comprising:
- an input pad to receive an input signal;
- a receiver having an input terminal coupled to the input pad to receive the input signal, a reference terminal to receive a reference signal;
- and an output terminal to issue an output signal responsive to the input signal and the reference signal;
- and
- first and second termination legs to support the first termination topology and the second termination topology, the first and second termination legs connecting the input terminal to a first-supply-voltage node and a second-supply-voltage node, respectively, in the first termination topology and coupling the input terminal to the reference terminal in the second terminal topology.
2 more elements
An integrated-circuit (IC) die programmable to support a filtered termination topology or an unfiltered termination topology, the IC die comprising:
- an input pad to receive an input signal;
- a receiver having an input terminal coupled to the input pad to receive the input signal, a reference terminal to receive a reference signal;
- and an output terminal to issue an output signal responsive to the input signal and the reference signal;
- and
- first and second termination legs to support the filtered termination topology and the unfiltered termination topology, the first and second termination legs connecting the input terminal to a first filter node and a second filter node, respectively, in the filtered termination topology and connecting the input terminal to a reference node in the unfiltered termination topology.
2 more elements
Dependencies are inferred from the claim text.