US Patent No: 8,188,615

Number of patents in Portfolio can not be more than 2000

Integrated circuit adapted to be selectively AC or DC coupled

ALSO PUBLISHED AS: 20110068632

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Abstract

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An integrated circuit is adapted to be selectively AC or DC coupled to an external device at a coupling point. The integrated circuit includes a first connector connected to the coupling point by way of a coupling capacitor for AC coupling, a second connector connected to the coupling point for DC coupling, and a switch to selectively short the first and second connectors and thereby the coupling capacitor, when the integrated circuit is DC coupled to the device. The switch may be a MOSFET bridge comprising a switch control MOSFET interconnected between the first and second connectors, with the switch control MOSFET receiving at its gate a mode status signal for turning on the switch control MOSFET and thereby shorting the MOSFET bridge when the integrated circuit is DC coupled to the external device. The MOSFET bridge also includes a number of dynamically biased nMOSFETs connected in series with the switch control MOSFET in order to protect switch control MOSFET from high external supply voltages, and a number of dynamically biased pMOSFETs connected in parallel with the switch control MOSFET.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ATI TECHNOLOGIES ULCMARKHAM ONTARIO830

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ashtiani, Pouya - 2 0
Du, Yamin - 4 4
Fung, Richard Markham, CA 10 22

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ATI TECHNOLOGIES ULC (1)
2010/0176,848 INPUT/OUTPUT BUFFER CIRCUIT 2 2009
 
COSMIC CIRCUITS PRIVATE LIMITED (1)
2010/0283,439 EFFICIENT SWITCH CASCODE ARCHITECTURE FOR SWITCHING DEVICES 3 2009
 
CREST FALLS LIMITED LIABILITY COMPANY (1)
7,053,657 Dynamically biased wide swing level shifting circuit for high speed voltage protection input/outputs 7 2004
 
Dell USA, L.P. (1)
5,864,457 System and method for controlling current flow in an AC adapter 13 1997
 
DET INTERNATIONAL HOLDING LIMITED (1)
7,719,137 DC-DC switching converter device 1 2004
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6,968,413 Method and system for configuring terminators in a serial communication system 8 2002
 
NATIONAL INSTRUMENTS CORPORATION (1)
2009/0322,157 RF AC/DC Coupling Circuit Using General Purpose Solid-State Relay 1 2009
 
SILICON GRAPHICS INTERNATIONAL, CORP. (1)
7,533,208 Hot plug control apparatus and method 4 2005
 
SUN MICROSYSTEMS, INC. (1)
6,574,695 System and method for providing hot swap capability using existing circuits and drivers with minimal changes 25 2000
 
TRANSPACIFIC AVARTAR, LLC (1)
6,253,267 Hot-plug of PCI bus using single chip 54 1998
 
VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY (1)
7,138,730 Topologies for multiple energy sources 17 2002

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