Patents by Inventor Christopher T. Ngo

Christopher T. Ngo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11964115
    Abstract: A catheter that includes a mechanism for deflecting a distal portion of a catheter may include a deflection knob including a first thread, a rod including a second thread that is coupled to the first thread, and a puller wire that is connected to the rod. The rod may additionally include a pocket to which the puller wire may be connected via a joining feature that may be secured in the pocket and attached to a proximal end of the puller wire. The joining feature may include a first ferrule joined, e.g., crimped, to the proximal end of the puller wire and a second ferrule secured, e.g., bonded, in the pocket and joined, e.g., crimped, to the first ferrule.
    Type: Grant
    Filed: October 17, 2022
    Date of Patent: April 23, 2024
    Assignee: BIOSENSE WEBSTER (ISRAEL) LTD.
    Inventors: Don Q. Ngo-Chu, Susan Ayer, Christopher T. Beeckler, Kevin J. Herrera, Joseph T. Keyes
  • Patent number: 9166471
    Abstract: A circuit and method is disclosed that dithers a switching frequency of a DC-to-DC converter which gets modulated onto an RF carrier such that switching noise is spread over a given bandwidth that is wider than a communications measurements bandwidth. The circuit includes a switching circuitry adapted to transfer energy from a source to a load using a switching signal having a series of switching cycles and a switching frequency. Also included is a control circuitry adapted to generate a pseudo-random value near a beginning of each of the series of switching cycles to determine a maximum switching frequency value based upon the pseudo-random value. The method includes adjusting the switching frequency of the switching signal incrementally from a fixed minimum switching frequency value to the maximum frequency value and vice versa as a function of time during each of the series of switching cycles of the switching circuit.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: October 20, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Chris Levesque, James Retz, Christopher T. Ngo
  • Publication number: 20120303836
    Abstract: Disclosed is a method in which slaves are cascaded on a bus, and cascading slave-to-slave communication is used to prioritize (or sequence) the software slave ID programming, enabling users to uniquely identify identical components in a circuit. In one embodiment, the first slave in the cascade stalls the programming of other slaves until the first slave's programming is complete. Once completed, the first slave then enables programming of the second slave, and so on. This embodiment allows multiple placements of identical slaves on the bus, and provides a method to uniquely identify and control each slave by using cascading software slave ID programming. In another embodiment, a structure with a similar effect may be created by lack of enablement (instead of disablement), wherein initially only the first slave is enabled, and subsequent slaves are not initially enabled. Additionally, the present disclosure is compatible with the MIPI RFFE standard interface.
    Type: Application
    Filed: May 23, 2012
    Publication date: November 29, 2012
    Applicant: RF MICRO DEVICES, INC.
    Inventors: Christopher T. Ngo, Alexander W. Hietala
  • Patent number: 8091210
    Abstract: A method provides a structure in a magnetic recording transducer. The structure resides on an underlayer. The method includes providing a protective layer and providing layer(s) for the structure. The protective layer covers a field region but exposes a device region in which the structure is to reside. A first portion of the layer(s) reside in the device region, while a second portion of the layer(s) reside in the field region. The method also includes removing the second portion of the layer(s) using an over-removal condition. The underlayer is covered by a remaining portion of the protective layer after the removing step is completed. The method also includes removing the remaining portion of the protective layer. An underlayer removal rate is substantially less than a protective layer during the step of removing of the protective layer.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: January 10, 2012
    Assignee: Western Digital (Fremont), LLC
    Inventors: Keith Y. Sasaki, Christopher T. Ngo
  • Patent number: 7911735
    Abstract: The method and system for providing a perpendicular magnetic recording (PMR) head are described. The PMR head includes a base layer, a nonmagnetic metal underlayer on the base layer, and a PMR pole on the nonmagnetic metal underlayer. The PMR pole has a top that is wider than its bottom. The base layer has a first hardness with respect to a pole trim. The nonmagnetic metal underlayer has a second hardness with respect to the pole trim. The second hardness is less than the first hardness.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: March 22, 2011
    Assignee: Western Digital (Fremont), LLC
    Inventors: Kyusik Sin, Mun Hyoun Park, Honglin Zhu, Christopher T. Ngo
  • Patent number: 7493688
    Abstract: A method for providing a magnetic recording transducer is disclosed. The method includes providing a first pole having front and rear portions and a back gap on the rear portion. The method also includes providing an insulator on the first pole. The method includes providing a write gap and providing a portion of a second pole on at least the write gap. A portion of the write gap resides on the front portion of the first pole. A portion of the insulator covers a portion of the first pole between the portion of the second pole and the back gap. The method also includes providing a mask that covers the back gap and exposes the portion of the second pole and the insulator. The method also includes performing a pole trim that can substantially remove the portion of the insulator covering the remaining portion of the first pole.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: February 24, 2009
    Assignee: Western Digital (Fremont), LLC
    Inventors: Lei Wang, Liping Ren, Yingjian Chen, Christopher T. Ngo, Ming Zhao