Eugene C Lee

US Patent:

6359743, Mar 19, 2002

Filed:

Nov 20, 1998

Appl. No.:

09/197122

Inventors:

Giuseppe Patti - San Jose CA
Eugene C. Lee - Cupertino CA
Roberto Alini - San Jose CA

Assignee:

STMicroelectronics, Inc. - Carrollton TX

International Classification:

G11B 502

US Classification:

360 25, 360 65, 360 46

Abstract:

An apparatus (and method) is provided that reduces thermal interference in the read signal of a disk drive. A variable or programmable resistance is used to change the transfer function of a filter in the read channel of the disk drive to filter the read signal. The filter has a first transfer function (first cut-off frequency) related to the programmed resistance during normal operation of the disk drive (i. e. when thermal interference is not detected). When thermal interference is detected in the read signal, the resistance is programmed to another value resulting in the filter having a second transfer function (second cut-off frequency). The resistance element is variable or programmable to different values resulting in different programmable transfer functions (or one of a multitude of cut-off frequencies) for the filter. In the preferred embodiment, detection of thermal interference increases the cut-off frequency of the filter thereby filtering, or reducing the effects of, the thermal interference in the read signal.

US Patent:

6416309, Jul 9, 2002

Filed:

Feb 16, 2000

Appl. No.:

09/505444

Inventors:

Kenneth J. Michlitsch - Palo Alto CA 94303
Shaun Meredith - Natick MA 01760
Daniel J. Keating - Somerville MA 02145
Yaakov Weinstein - Brookline MA 02445
Eugene Lee - Somerville MA 02144
Michael D. Rees - New York NY 10007
Darren Soetantyo - Providence RI 02906
Sean Padgett - Grafton MA 01519
Steven D. Eppinger - Lexington MA 02421

International Classification:

A23G 0928

US Classification:

425187, 425279

Abstract:

Methods and apparatus are provided for serving ice cream with a chemically-heated ice cream scoop. The scoop comprises a bowl and a handle with an interior cavity filled with a nontoxic, supercoolable salt solution. The salt solution may be selectively crystallized by triggering an activator in fluid communication with the solution. Crystallization evolves a significant amount of heat that is used to elevate the temperature of the scoop bowl, thereby decreasing the cutting force required to separate a serving of ice cream from a storage container and reducing adherence of the ice cream within the scoop bowl. After use, the scoop may be recharged by elevating the temperature of the crystallized solution above its crystallization temperature. The process of crystallization, melting, and supercooling may be repeated indefinitely.

US Patent:

6745277, Jun 1, 2004

Filed:

Oct 4, 2000

Appl. No.:

09/679266

Inventors:

Eugene Lee - San Jose CA
Somsubhra Sikdar - San Jose CA

Assignee:

Force10 Networks, Inc. - Milpitas CA

International Classification:

G06F 1200

US Classification:

711 5, 711157, 711158, 711213, 711147, 711148, 36523003, 36523004, 370394, 3703951, 3703956, 370396, 370400, 370401, 709102, 709103

Abstract:

A network processing device intelligently interleaves packets for read and write access requests in a multibank memory. The system intelligently writes packets into the different memory banks so that the same memory bank is not used for back-to-back packet reads. The last memory bank write is determined for each output queue. This write information is used in combination with look ahead packet read information for a group of packets from the next output queue scheduled to read packets from memory. The scheduler uses all this information to avoid any back-to-back packet read, write, or read/write accesses to the same memory bank. This intelligent packet interleaving scheme preserves memory bus bandwidth normally wasted accessing the same memory banks.

US Patent:

6963576, Nov 8, 2005

Filed:

Sep 28, 2000

Appl. No.:

09/676046

Inventors:

Eugene W. Lee - San Jose CA, US

Assignee:

Force10 Networks, Inc. - Milpitas CA

International Classification:

H04L012/28
H04L012/56

US Classification:

370411, 370414, 3703954

Abstract:

An arbitration scheme is used for scheduling connections between input ports and output ports. Input ports request connections to the output ports for a next time slot. Arbitration parameters, such as priority and weight, are identified for the buffer requests. Output port arbitrations are conducted for each one of the output ports according to the arbitration parameters. If there are more than two input buffers with the same priority and weight, a round robin arbitration is used. Grants are issued to the input port buffers winning the output port arbitrations. Input port arbitrations are conducted using the same arbitration parameters for input ports receiving multiple grants. The grants are accepted by the input port buffers winning the input port arbitrations. The input port buffers accepting the grants are connected to the requested output ports. Virtual output buffers are used to prevent packet blocking at the input ports and a dual multicast and unicast arbitration is used for multicast and unicast packets.

US Patent:

6975638, Dec 13, 2005

Filed:

Oct 13, 2000

Appl. No.:

09/687762

Inventors:

Yao-Min Chen - San Jose CA, US
Heeloo Chung - San Francisco CA, US
Zhijun Tong - Fremont CA, US
Eugene Lee - San Jose CA, US

Assignee:

Force10 Networks, Inc. - Milpitas CA

International Classification:

H04L012/26
H04J001/16
G08C015/00
G06F011/00

US Classification:

370412, 370232, 370395, 709235

Abstract:

Methods and apparatus for interleaved weighted fair data packet queue sequencing are disclosed. An interleaving table specifies a queue sequence. A queue sequencer follows the table order on an epoch-by-epoch basis, selecting a queue for each epoch based on the table order. If the selected queue does not have enough data to fill its epoch, the sequencer can step to the next queue in the table order. Because the table is interleaved, higher-priority queues can be visited frequently, improving jitter and latency for packets associated with these queues. The table structure allows all queues at least some portion of the available output bandwidth, and can be organized to afford some queues a much larger portion without having those queues monopolize the output stream for inordinate amounts of time. In some embodiments, each table entry has a programmable epoch value associated with it. The epoch value can be used to weight each table entry respective to the other entries.

US Patent:

7224671, May 29, 2007

Filed:

Aug 15, 2001

Appl. No.:

09/930764

Inventors:

Eugene Lee - San Jose CA, US
Somsubhra Sikdar - San Jose CA, US
Andy Liu - Fremont CA, US
Ann Gui - Cupertino CA, US

Assignee:

Force10 Networks, Inc. - San Jose CA

International Classification:

G08C 15/00
H04J 3/14
H04L 12/26
H04L 12/28
H04L 12/56

US Classification:

370235, 370422

Abstract:

A data rate controller controls a rate that data is transferred over a backplane in a network processing device. A bandwidth allocator allocates bandwidth to an input port for transmitting data over the backplane to an output port. A bandwidth limiter identifies a maximum allowable bandwidth the input port is allocated on the backplane. A bandwidth tracker identifies an amount of bandwidth currently allocated to the input port for transmitting data over the backplane to the output port. When the current allocated bandwidth is used up, the data rate controller prevents that input port from connecting to output ports through the backplane until more bandwidth is allocated.

US Patent:

7284074, Oct 16, 2007

Filed:

Oct 31, 2002

Appl. No.:

10/286361

Inventors:

Eugene Lee - San Jose CA, US
Cong Ye - Fremont CA, US
Peter Chang - Fremont CA, US
Ajoy Aswadhati - Cupertino CA, US

Assignee:

Force10 Networks, Inc. - San Jose CA

International Classification:

G06F 5/00
G06F 3/00
G06F 13/00

US Classification:

710 52, 710 54, 710 57

Abstract:

A system and method for operating on data within a network device is described. Between two data operations in a network device is a FIFO queue, which is used to separate the clock domains of the data operations. Data from the first operation is stored in the FIFO queue, which signals an indication to the second operation that there is data in the queue. When the second operation is signaled that there is data in the FIFO queue, it immediately begins reading data from the queue, and begins performing its prescribed operations on the data once it has read enough data from the queue for it to begin operating.

US Patent:

7346067, Mar 18, 2008

Filed:

Nov 16, 2001

Appl. No.:

09/990753

Inventors:

Heeloo Chung - San Francisco CA, US
Eugene Lee - San Jose CA, US

Assignee:

Force 10 Networks, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370412, 370413, 370429

Abstract:

A network processing device stores and aligns data received from an input port prior to forwarding the data to an output port. Data packets arrive at various input ports already having an output queue or virtual output queue assigned. A buffer manager groups one or more packets destined for the same output queue into blocks, and stores the blocks in a buffer memory. A linked list is created of the trunks, which is an ordered collection of blocks. The trunks are sent to a high speed second memory and stored together as a unit. In some embodiments the trunks are split on boundaries and stored in a high speed memory. Once the trunks are stored in the high speed second memory, the corresponding data is erased from the write combine buffer memory and the pointers that made up the linked list are returned to a free block pointer pool. The data can then be read from the high speed second memory very quickly, passed through a switching fabric, and placed back on the computer network for its next destination. In other embodiments, the trunk data is stored after passing through the switching fabric, before being placed back on the computer network.