Krishna K Viswanadham

US Patent:

6424659, Jul 23, 2002

Filed:

Jul 17, 1998

Appl. No.:

09/118458

Inventors:

Krishna Viswanadham - Mountain View CA
Mahesh Veerina - Sunnyvale CA

Assignee:

Network Equipment Technologies, Inc. - Fremont CA

International Classification:

H04J 316

US Classification:

370469, 370389

Abstract:

Multilayer switching device and associated technique enables simultaneous wire-speed routing at OSI layer wire-speed switching at layer and support multiple interfaces at layer Implementation may be embodied using one or more integrated circuits (ASIC), RISC processor, and software, thereby providing wire-speed performance on interfaces, in various operational modes.

US Patent:

61638277, Dec 19, 2000

Filed:

Dec 16, 1997

Appl. No.:

8/991254

Inventors:

Krishna Viswanadham - Mountain View CA
Ranganathan Kothandapani - Sunnyvale CA

Assignee:

Network Equipment Technologies, Inc. - Fremont CA

International Classification:

G06F 1300

US Classification:

710111

Abstract:

Round-robin arbitration circuit selects in clock cycle channel contending for arbitration; each arbitrated channel having channel number in sequence of channel numbers. Channel is designated as currently arbitrated; designated channel having designated number. Channels are masked from arbitration with designated channel, such that designated and unmasked channels are arbitrated to select channel. Channels having numbers sequenced after designated number are masked from arbitration, and channels having, numbers sequenced earlier than designated are also masked from arbitration. During subsequent cycle, designated channel is shifted to next channel in sequence of channel numbers by incrementing designated number. When designated number is last in sequence, designated channel is shifted to next having first number in sequence.

US Patent:

57817448, Jul 14, 1998

Filed:

Aug 25, 1995

Appl. No.:

8/519505

Inventors:

Mary B. Johnson - San Jose CA
Lesley A. Bird - San Jose CA
Robert Bailey - San Jose CA
Krishna Viswanadham - Mountain View CA
Mark Seibert - Cupertino CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06F 1300

US Classification:

395283

Abstract:

An input/output interface apparatus that allows a computer system to have less ports and greater safety with the connection of peripheral devices to the ports is disclosed. The input/output interface apparatus enables the computer system to supply multiple bus standards to a single flexible port of the computer system. The input/output interface apparatus permits safe connection of a peripheral device to a port of the computer system when the computer system is powered-on (so called hot-plugging or hot-docking).

US Patent:

6208044, Mar 27, 2001

Filed:

Nov 13, 1997

Appl. No.:

8/969374

Inventors:

Krishna Viswanadham - Mountain View CA
David Law - Burlingame CA
Dennis Boyle - Palo Alto CA
Matt Herron - Menlo Park CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

H02N10/00

US Classification:

310 12

Abstract:

A media ejection system includes a peripheral unit having a housing, an ejection mechanism, and a memory wire coupled to the ejection mechanism. The system further includes a digital processor for issuing ejection commands, and a controller responsive to the ejection command for controlling a current flow through the memory wire. When sufficient current flows through the memory wire, it contracts to activate the ejection mechanism, thereby ejecting a removable medium (such a PCMCIA card) from the housing of the peripheral unit. A method of the invention includes the steps of receiving an ejection request, issuing a ejection command in response to the ejection request, where the ejection command includes parameters for controlling current flow through the metal alloy, and electrically energizing the memory alloy in accordance with the parameters such that the memory alloy undergoes a dimensional change to activate a removable medium ejection mechanism.

US Patent:

58181822, Oct 6, 1998

Filed:

Dec 30, 1994

Appl. No.:

8/367065

Inventors:

Krishna Viswanadham - Mountain View CA
David Law - Burlingame CA
Dennis Boyle - Palo Alto CA
Matt Herron - Menlo Park CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

H02N 206
H01R 13633

US Classification:

318116

Abstract:

A media ejection system includes a peripheral unit having a housing, an ejection mechanism, and a memory wire coupled to the ejection mechanism. The system further includes a digital processor for issuing ejection commands, and a controller responsive to the ejection command for controlling a current flow through the memory wire. When sufficient current flows through the memory wire, it contracts to activate the ejection mechanism, thereby ejecting a removable medium (such a PCMCIA card) from the housing of the peripheral unit. A method of the invention includes the steps of receiving an ejection request, issuing a ejection command in response to the ejection request, where the ejection command includes parameters for controlling current flow through the metal alloy, and electrically energizing the memory alloy in accordance with the parameters such that the memory alloy undergoes a dimensional change to activate a removable medium ejection mechanism.