1
Xianxin Li, Hong Leong Hong, Adbullah Raouf, Anna Tam, John Chi Hung Hui, Tat C Choi: Multi-mode charger device. Pericom Semiconductor Corporation, The Webostad Firm, August 7, 2012: US08237414 (31 worldwide citation)

Multi-mode charger device for charging portable devices and methods of charging portable devices are described. In an embodiment, a multi-mode charger device has mode blocks respectively associated with modes of operation which are coupled to a switch module. The switch module is for coupling a sele ...


2
Lawrence T Tse, Tat C Choi, David C Soo: Method and apparatus for on-the-fly multiple display mode switching in high-resolution bitmapped graphics system. Chrontel, Flehr Hohbach Test Albritton & Herbert, December 5, 1995: US05473342 (27 worldwide citation)

A RAMDAC circuit drives a display device so as display multiple modes of color depth and display resolution in a single display frame without sacrificing resolution of the higher-resolution mode, and adjusts the output pixel rate to match that of the display mode being display on a pixel-by-pixel ba ...


3
Tat C Choi, Richard K Klein, Craig S Sander: Triple-poly 4T static ram cell with two independent transistor gates. Advanced Micro Devices, Salzman & Levy, August 21, 1990: US04951112 (25 worldwide citation)

A 4T static RAM cell (10) comprising a flip-flop with two pull-down transistors (18, 20) and two pass-gate transistors (12, 14) is fabaricated employing two separate gate oxide formations (74, 76) and associated separate polysilicon depositions (52a -b, 56). Two reduced area contacts (58, 60) connec ...


4
Craig S Sander, Richard K Klein, Tat C Choi: Reduced area butting contact structure. Advanced Micro Devices, Ashen Golant Martin & Selden, March 27, 1990: US04912540 (10 worldwide citation)

A reduced area butting contact structure (10') is provided, which is especially suited for four-transistor static RAM cells. A structure is formed which includes a doped silicon region and one or more layers of polysilicon and oxide situated thereabove, one of which layers of polysilicon may be a ga ...


5
Xianxin Li, Hong Leong Hong, Adbullah Raouf, Anna Tam, John Chi Hung Hui, Tat C Choi: Multi-mode charger device. Pericom Semiconductor Corporation, The Webostad Firm A Professional Corporation, May 12, 2015: US09030155 (1 worldwide citation)

Multi-mode charger device for charging portable devices and methods of charging portable devices are described. In an embodiment, a multi-mode charger device has mode blocks respectively associated with modes of operation which are coupled to a switch module. The switch module is for coupling a sele ...


6
Michael Yimin Zhang, Tat C Choi: Clock signal noise shaping. Pericom Semiconductor Corporation, The Webostad Firm, October 25, 2011: US08044711

A method and apparatus for clock signal noise shaping are described. Embodiments of a clock circuit include a filter coupled to receive an input clock signal and to provide an output clock signal. The filter filters noise of the input clock signal to shape the noise to provide the output clock signa ...