Isaac M Wong, 45Union City, CA

6462689, Oct 8, 2002

Jan 25, 2001

09/771397

Isaac H. Wong - Fremont CA

Ishoni Networks, Inc. - Santa Clara CA

H03M 166

341144, 341139, 341143, 341152

A digital to analog converter (DAC) has an adjustable dynamic range. Specifically, the adjustable DAC has a control port that receives a control signal indicative of the dynamic range, and the DAC produces an analog signal of the specified dynamic range in response to a corresponding digital signal. In one embodiment, the adjustable DAC includes a bitstream generator that repeatedly generates a bitstream and a low pass filter that receives and filters the repeated bitstream. The bitstream generator is adjustable, and can produce bitstreams of different lengths, depending on the control signal. Increasing the bitstream length results in a greater dynamic range of the analog signal, and vice versa. A user can use a preexisting filter to perform the low pass filtering, by simply selecting a value of the control signal. Alternatively, the user can set a value of the control signal (based on an applications dynamic range requirement), and design the low pass filter based on the selected value of the control signal.

2002010, Aug 8, 2002

Feb 6, 2001

09/777609

Jacques Baudot - St-Vincent-de-Mercuze, FR
Stella Kwong - Los Altos CA, US
Isaac Wong - San Jose CA, US
Denis Roger - Varces, FR
Abdessattar Sassi - Cupertino CA, US
Marc Brandt - Eybens, FR

G06F015/16
H04L001/22
H04B001/74
H02H003/05
H05K010/00
H03K019/003

709/227000, 714/011000

The present invention provides a method for hosting a series of active connections between Internet Protocol end-points and a system which hosts at least two processes, each process of the system including a similar instruction set constituting a service application and each process having an IP address, wherein at least one process may adopt an active state where a plurality of connections are used for sending and receiving data while at least one other process may adopt a stand-by state where a plurality of connections are not used for sending and receiving data, the method including: replicating data from the at least one active process to the at least one stand-by process, the replicated data including status data of the connections of the active process, so that the stand-by process maintains its connections updated with said replicated data, and the replicated data further including status data of the instruction set constituting the service application in the at least one active process, so that the instruction set constituting the service application in the at least one stand-by process remains updated with said replicated data, and deactivating the IP address of the active process and activating the IP address of the stand-by process in case the active process becomes unavailable.

2002013, Sep 26, 2002

Jan 25, 2001

09/772112

Isaac Wong - Fremont CA, US

G05B015/02

700/008000

A multiprocessor system uses a master processor coupled to a ROM device to transfer boot code to slave processors over a bus. The memory controllers in the slave processors are controlled to deny processor memory request until the boot code has been transferred to their RAM devices. The memory controllers map the transferred boot codes to a first address space in their RAM devices.

2002013, Sep 26, 2002

Jan 25, 2001

09/772113

Isaac Wong - Fremont CA, US

G06F019/00
G01R027/28
G01R031/00
G01R031/14

702/119000

A method for automatically selecting delays for slave processors' memory controllers in a multiprocessor system is presented. A master processor coupled to the slave processors on a bootstrap bus commands the slave processors' memory controllers to select the delays. Various delay parameters are tested to select optimal delay parameter values.

2005016, Jul 28, 2005

Dec 24, 2003

10/746750

Isaac Wong - San Jose CA, US

G06F015/16

709201000, 709245000

Methods and apparatus are disclosed for forwarding a data packet addressed to a cluster of servers. According to one disclosed method, when a connection request is received from a client, a connection identifier is formed according to the connection request. The connection request is forwarded to a first-identified server in the cluster of servers. The connection identifier is associated with a responding server in the cluster of servers. Subsequent traffic received from the client associated with the connection identifier is forwarded to the responding server associated with the connection identifier.

2005028, Dec 22, 2005

Jun 22, 2004

10/874665

Isaac Wong - San Jose CA, US

G06F015/173
G06F015/16

709224000, 709227000

A connection from a client to a primary server is monitored and state information pertaining to a protocol stack used in the primary server is conveyed to a standby server. When the primary server becomes unhealthy, a crossover message is sent by the standby server to a client according to the conveyed state information.

6370067, Apr 9, 2002

Jan 25, 2001

09/772111

Isaac H. Wong - Fremont CA
Keith V. Ngo - Gilroy CA
Jau-Wen Ren - Saratoga CA

Ishoni Networks, Inc. - Santa Clara CA

G11C 700

365194, 365233, 365201

A memory controller configured according to a delay pair for communicating with a memory device automatically selects optimal delay pairs by testing whether successful communication exists at various values for the delay pairs. The resulting set of delay pairs allowing successful communication are divided into a boundary set and non-boundary set. An optimal delay pair from the non-boundary set is chosen according to its relationship to delay pairs in the boundary set.