Gregory D Fung

8305142, Nov 6, 2012

Dec 3, 2010

12/959986

Gregory A. Fung - Fremont CA, US

Linear Technology Corporation - Milpitas CA

H03F 1/26

330149

An actual linear amplifier distorts an input signal, such as an RF signal, and generates third order intermodulation (IM3) products. A single-port predistortion circuit is connected at a single node of an input line to the amplifier via an AC coupling capacitor. The fundamental frequency of the input signal is applied to a forward biased diode junction. The current through the diode is applied to a second capacitor. The appropriate setting of a tuning device, such as a tunable resistor or a tunable capacitor, causes the predistortion circuit to invert the second harmonic generated by the diode. The inverted second harmonic signal is applied to the single node of the input line to add predistortion to the signal applied to the amplifier. The predistortion cancels or substantially reduces the IM3 products at the output of the amplifier.

8305148, Nov 6, 2012

Dec 3, 2010

12/959970

Gregory A. Fung - Fremont CA, US

Linear Technology Corporation - Milpitas CA

H03F 3/68

330311

An actual linear amplifier distorts an input signal, such as an RF signal, and generates third order intermodulation (IM3) products. In an embodiment of a Class A amplifier, the linear amplifier is a bipolar, common emitter-configured (CE) transistor using a cascode transistor to provide a fixed collector bias voltage to the CE transistor. The CE transistor has a transconductance vs. base-emitter voltage (V) characteristic which, when plotted, shows a transconductance that increases with an increasing Vto a maximum, then drops, then tapers off, wherein there is an inflection point between the maximum transconductance and where the transconductance tapers off. A DC bias circuit provides a DC bias voltage to the base of the CE transistor that causes the CE transistor's operating point to track the inflection point over a range of temperatures. This operating point causes the IM3 products to be greatly reduced.

8469983, Jun 25, 2013

Sep 17, 2008

12/212511

Gregory W. Fung - San Mateo CA, US
Eduardo Sager - Milpitas CA, US
Russell A. Seiber - Redwood Shores CA, US
Gary H. Miller - Milpitas CA, US
Maria Garcia - San Jose CA, US

SentreHEART, Inc. - Redwood City CA

A61B 17/138

606170, 606138

Described here are devices and methods for suture management. In some variations, the devices comprise an elongate tubular member having a proximal end, a distal end, a lumen therebetween, a cantilever blade positioned near the distal end of the elongate tubular member, and an expandable member positioned adjacent the cantilever blade for actuating the cantilever blade. Also described are devices comprising an elongate tubular member having a proximal end, a distal end, a lumen at least partially therebetween, and an aperture in a wall thereof for passage of a suture therethrough. These devices further comprise a blade connected to a blade housing disposed within the lumen, where the blade is oriented parallel to the longitudinal axis of the lumen. The blade and blade housing may be slidable within the lumen, or an inner shaft for may be slidable within the lumen. Methods of using the devices are also described.

20060190024, Aug 24, 2006

Feb 24, 2005

11/066028

Nianjiong Bei - Foster City CA, US
William Boyle - Fallbrook CA, US
Gregory Fung - San Mateo CA, US
Joanna Lubas - Fremont CA, US
Alexander Nikanorov - Fallbrook CA, US

A61M 29/00

606200000

A catheter assembly configured for retrieval of medical devices from vasculature. The catheter includes an outer catheter and an inner catheter. The inner and/or outer catheter can include a tapered terminal end portion. A mandrel can be provided to facilitate advancement of the assembly within vasculature.

20060224176, Oct 5, 2006

Mar 31, 2005

11/097010

Gregory Fung - San Mateo CA, US
Nianjiong Bei - Foster City CA, US
Alexander Nikanorov - Palo Alto CA, US
Danielle LaFlash - San Mateo CA, US

A61M 29/00
A61M 5/178

606200000, 604165030

A guide wire locking mechanism for a catheter system includes a motion-limiting component adapted to contact a portion of a guide wire and limit the direction of motion that the guide wire can slide therethrough. The motion-limiting component allows the guide wire to slide in one direction when placed in the locking mechanism but prevents the guide wire from moving in the opposite direction. The motion-limiting component can be made from a row of movable teeth having contact surfaces or faces which come in contact with a portion of the guide wire. The teeth are bendable to allow the guide wire to move in one direction but will tighten against the guide wire if one attempts to move the guide wire in an opposite direction. The guide wire locking mechanism can be used with a recovery sheath that can be advanced over the guide wire to collapse an expandable filtering portion mounted on a guide wire. The locking mechanism helps to maintain the recovery catheter on the collapsed filtering portion to allow both the recovery catheter and the filtering device to be simultaneously removed from the patient's vasculature, thus preventing the possibility that the recovery catheter can somehow be retracted off the filtering portion during removal.

20070088382, Apr 19, 2007

Oct 13, 2005

11/249723

Nianjiong Bei - Foster City CA, US
Earl Bright - San Jose CA, US
Andy Denison - Temecula CA, US
Gregory Fung - San Mateo CA, US
William Harrison - Signal Mountain TN, US
Daniel Heilbrunn - Vancouver, CA
Danielle Laflash - San Mateo CA, US
Jeffrey Lew - Murrieta CA, US
Joanna Lubas - Fremont CA, US
Paul Muller - San Carlos CA, US
Alexander Nikanorov - Palo Alto CA, US
John Papp - Temecula CA, US

A61M 29/00

606200000

An embolic protection recovery catheter assembly configured for retrieval of medical devices from vasculature. The catheter includes a distal end portion adapted for effectively retrieving devices. In one aspect, the distal end portion is collapsible and in another aspect it is expandable. In other aspects, the catheter includes sub-structure supporting the distal tip or a tear-away tip configured to aid in the recovery process.

20080015491, Jan 17, 2008

Jul 26, 2007

11/828518

Nianjiong Bei - Foster City CA, US
William Boyle - Fallbrook CA, US
Gregory Fung - San Mateo CA, US
Joanna Lubas - Fremont CA, US
Alexander Nikanorov - Fallbrook CA, US

ABBOTT VASCULAR SOLUTIONS, INC. - Santa Clara CA

A61M 25/00

604027000

A catheter assembly configured for retrieval of medical devices from vasculature. The catheter includes an outer catheter and an inner catheter. The inner and/or outer catheter can include a tapered terminal end portion. A mandrel can be provided to facilitate advancement of the assembly within vasculature.

20080243183, Oct 2, 2008

Mar 25, 2008

12/055213

Gary H. MILLER - Milpitas CA, US
Russell A. Seiber - Redwood Shore CA, US
Gregory W. Fung - San Mateo CA, US

A61B 17/04

606228, 606232

Described here are devices, systems and methods for closing the left atrial appendage. Some of the methods described here utilize one or more guide members having alignment members to aid in positioning of a closure device. In general, these methods include advancing a first guide having a first alignment member into the left atrial appendage, advancing a second guide, having a second alignment member, into the pericardial space, aligning the first and second alignment members, advancing a left atrial appendage closure device into the pericardial space and adjacent to the left atrial appendage, and closing the left atrial appendage with the closure device. In these variations, the closure device typically has an elongate body having a proximal end and a distal end, and a closure element at least partially housed within the elongate body. The closure element comprises a loop defining a continuous aperture therethrough.