Back to results
US 2003/0117172 A1Published application
Bi-directional output buffer
AssigneeSun Microsystems, Inc.
InventorsChung-Hsiao R. Wu, Jyh-Ming Jong
Life of this patent
Estimating the term…
Abstract
A bidirectional output buffer includes active termination and separate driving and receiving impedances. The buffer has at least a driving mode and a receiving mode. In driving mode, the output impedance of the buffer is calibrated to a specified strength. In receiving mode, the buffer is calibrated to another specified impedance as an active termination. In addition, the buffer may be configured such that resistive components are shared in driving and receiving modes.
Claims20
A bi-directional buffer comprising:
- a driver component;
- a receiver component;
- and
- circuitry configured to:
- select a driving mode of operation in response to detecting a first condition, wherein said driving mode comprises a first resistivity;
- and
- select a receiving mode of operation in response to detecting a second condition, wherein said receiving mode provides active termination.
4 more elements
A system comprising:
- a data bus;
- a storage device coupled to said data bus;
- and
- a memory controller including a buffer coupled to said data bus, wherein said buffer is configured to:
- drive data onto said data bus in response to detecting a first mode of operation, wherein said first mode comprises a first resistivity;
- and
- receive data via said data bus in response to detecting a second mode of operation, wherein said second mode provides active termination.
4 more elements
A method of bidirectional communication comprising:
- selecting a driving mode of operation in response to detecting a first condition, wherein said driving mode comprises a first resistivity;
- selecting a receiving mode of operation in response to detecting a second condition, wherein said receiving mode comprises an active termination with a resistivity different than said first resistivity.
Dependencies are inferred from the claim text.