KWOK KEUNG LEE
Electrician at Acme Cir, Plano, TX
License number
Texas 164699
Expiration Date
Jan 29, 2018
Category
Master Electrician
Address
Address
6408 Acme Cir, Plano, TX 75074
Phone
(972) 922-6493
Professional information
Monolithic Solid State Relay Circuit For Telecom Wireline Applications
US Patent:
7990675, Aug 2, 2011
Filed:
Mar 12, 2009
Appl. No.:
12/403110
Inventors:
Michael L. Robinson - Plano TX, US
Kwok Lee - Plano TX, US
Kwok Lee - Plano TX, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H02H 1/00
US Classification:
361119
Abstract:
Methods and apparatus for utilizing a solid state relay arrangement as a part of a protection scheme for a telecom wireline card suitable are disclosed. According to one embodiment, a line card that is suitable for use in an optical network device includes an electrical port, a plurality of input lines, an output line, and protection circuitry. The protection circuitry switches or multiplexes the plurality of input lines into the output line, and includes a solid state relay arrangement and power isolation circuitry. The power isolation circuitry provides a high impedance to power rails associated with the solid state relay arrangement, and the solid state relay arrangement includes at least one N-channel field effect transistor (FET), at least one protection diode, and at least one charge pump.
Monolithic Solid State Relay Circuit For Telecom Wireline Applications
US Patent:
2006004, Mar 2, 2006
Filed:
Aug 31, 2004
Appl. No.:
10/930089
Inventors:
Michael Robinson - Plano TX, US
Kwok Lee - Plano TX, US
Kwok Lee - Plano TX, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H02H 3/00
US Classification:
361100000
Abstract:
Methods and apparatus for utilizing a solid state relay arrangement as a part of a protection scheme for a telecom wireline card suitable are disclosed. According to one aspect of the present invention, a line card that is suitable for use in an optical network device includes an electrical port, a plurality of input lines, an output line, and protection circuitry. The protection circuitry switches or multiplexes the plurality of input lines into the output line, and includes a solid state relay arrangement and power isolation circuitry. The power isolation circuitry provides a high impedance to power rails associated with the solid state relay arrangement, and the solid state relay arrangement includes at least one N-channel field effect transistor (FET), at least one protection diode, and at least one charge pump.
Performance Measurement In A Network Supporting Multiprotocol Label Switching (Mpls)
US Patent:
8638778, Jan 28, 2014
Filed:
Sep 11, 2009
Appl. No.:
12/557803
Inventors:
Kwok Keung Lee - Plano TX, US
Hsiang Ann Chen - Austin TX, US
Jason Xiaoguang Chen - San Jose CA, US
Rakesh Kumar - Austin TX, US
Hsiang Ann Chen - Austin TX, US
Jason Xiaoguang Chen - San Jose CA, US
Rakesh Kumar - Austin TX, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/28
US Classification:
370351
Abstract:
A method and apparatus to provide hop-by-hop tracking for a communication network is described. In one embodiment, a router verifies that a next downstream router supports tracking and in response, adds a tracking indicator and a timestamp to the data packet. An end router provides a compilation of all the timestamps back to the originating router.
Power Input Terminal Block Housing And Cover
US Patent:
8632359, Jan 21, 2014
Filed:
Jul 26, 2013
Appl. No.:
13/952127
Inventors:
Edward John Kliewer - Sunnyvale CA, US
Kwok Keung Lee - Plano TX, US
Sam David Blackwell - Round Rock TX, US
Kwok Keung Lee - Plano TX, US
Sam David Blackwell - Round Rock TX, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H01R 13/73
US Classification:
439545, 439564
Abstract:
In an embodiment, an apparatus includes a housing and a cover. The housing can include a surface to receive a terminal block to transmit power to an electrical component. A shroud to be inserted within the electrical component can extend away from the housing surface. The cover can have an end for hingedly attaching to the housing. The cover is pivotable relative to the housing between a closed position and an open position. In the closed position, the cover and the housing together form an enclosure for the terminal block.
Power Input Terminal Block Housing And Cover
US Patent:
8496488, Jul 30, 2013
Filed:
Mar 24, 2011
Appl. No.:
13/070705
Inventors:
Matthew Don Grimm - Leander TX, US
Edward John Kliewer - Sunnyvale CA, US
Kwok Keung Lee - Plano TX, US
Sam David Blackwell - Round Rock TX, US
Edward John Kliewer - Sunnyvale CA, US
Kwok Keung Lee - Plano TX, US
Sam David Blackwell - Round Rock TX, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H01R 13/44
US Classification:
439144, 439467, 439564, 439716
Abstract:
An apparatus includes a housing and a cover. The housing can include a surface to receive a terminal block to transmit power to an electrical component. A shroud to be inserted within the electrical component can extend away from the housing surface. The cover can have an end for hingedly attaching to the housing. Another cover end can be configured to releasably lock to the housing. The housing and the cover can have notches. The cover is pivotable relative to the housing between a closed position and an open position. In the closed position, the cover and the housing together form an enclosure for the terminal block, and the notches of the housing and the cover cooperatively define passageways configured to receive external wires to connect to the terminal block.