Thinh Quoc Nguyen

US Patent:

6509796, Jan 21, 2003

Filed:

Feb 8, 2001

Appl. No.:

09/780065

Inventors:

Thinh Cat Nguyen - San Jose CA
Arnoldus Venes - Laguna Niguel CA

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 345

US Classification:

330254, 330283

Abstract:

Continuously tuning a transconductance. Coupling a degeneration resistance from a first source of a first transistor in a differential pair of transistors to a second source of a second transistor in the differential pair of transistors. Applying a second variable degeneration resistance in parallel to the first degeneration resistance in response to the application of a first variable control voltage. And applying a third variable degeneration resistance in parallel to the first degeneration resistance and the second degeneration resistance in response to the application of a second variable control voltage having a fixed voltage offset from the first variable control voltage.

US Patent:

6744320, Jun 1, 2004

Filed:

Dec 2, 2002

Appl. No.:

10/307293

Inventors:

Thinh Cat Nguyen - San Jose CA
Arnoldus Venes - Laguna Niguel CA

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 345

US Classification:

330254, 330283, 330253

Abstract:

Continuously tuning a transconductance. Coupling a degeneration resistance from a first source of a first transistor in a differential pair of transistors to a second source of a second transistor in the differential pair of transistors. Applying a second variable degeneration resistance in parallel to the first degeneration resistance in response to the application of a first variable control voltage. And applying a third variable degeneration resistance in parallel to the first degeneration resistance and the second degeneration resistance in response to the application of a second variable control voltage having a fixed voltage offset from the first variable control voltage.

US Patent:

6972625, Dec 6, 2005

Filed:

Apr 14, 2004

Appl. No.:

10/823543

Inventors:

Thinh Cat Nguyen - San Jose CA, US
Arnoldus Venes - Laguna Niguel CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F003/45

US Classification:

330254, 330283, 330253

Abstract:

Continuously tuning a transconductance. Coupling a degeneration resistance from a first source of a first transistor in a differential pair of transistors to a second source of a second transistor in the differential pair of transistors. Applying a second variable degeneration resistance in parallel to the first degeneration resistance in response to the application of a first variable control voltage. And applying a third variable degeneration resistance in parallel to the first degeneration resistance and the second degeneration resistance in response to the application of a second variable control voltage having a fixed voltage offset from the first variable control voltage.

US Patent:

20130337755, Dec 19, 2013

Filed:

Jun 19, 2012

Appl. No.:

13/526825

Inventors:

Thinh Nguyen - Santa Clara CA, US
Arvind Keerti - Santa Clara CA, US
Sudhakar Kalakota - Santa Clara CA, US
Rainer Gaethke - Santa Clara CA, US

Assignee:

QUALCOMM INCORPORATED - San Diego

International Classification:

H04B 1/04

US Classification:

4551151, 455 91

Abstract:

A multipath circuit is described that has multiple signal paths and various common components used for normal operation. Each of the multiple signal paths also has multiple circuit blocks defining the functionality of the signal path. A shared access path is provided through the third winding of a three-way transformer for each signal path. Multiple switches are provided in the multipath circuit that couple to the third winding in each of the multiple signal paths. The switches are also coupled to the various common components. Selected ones of these switches may be closed to provide a shared access path between a common component and one of the signal paths or between a common components and one of the circuit blocks in one of the signal paths.

US Patent:

54424984, Aug 15, 1995

Filed:

Nov 8, 1993

Appl. No.:

8/148791

Inventors:

Wayne L. Cheung - San Jose CA
Chenhuei J. Chaing - San Jose CA
Thinh H. Nguyen - Sunnyvale CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11B 5596
G11B 509

US Classification:

360 7708

Abstract:

A disk head position control system having a disk head controller that moves a disk head relative to a surface of a magnetic media disk encoded with a plurality of tracks of a quadrature burst pattern includes a burst pattern that comprises an asynchronous, multi-frequency track address code having burst pattern transitions that extend across the width of a track and are arranged in staggered fashion in alternate tracks such that no transitions between adjacent tracks are aligned in the disk radial direction.

US Patent:

63240300, Nov 27, 2001

Filed:

Sep 26, 1997

Appl. No.:

8/938267

Inventors:

Wayne Leung Cheung - San Jose CA
Thinh Huu Nguyen - Sunnyvale CA
Chorng-Kuang Wang - Taipei, TW

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11B 5596

US Classification:

360 7708

Abstract:

A digital servo system for a disk drive provides servo information signal demodulation. The system includes a digital demodulator including a burst signal accumulator that accumulates terms according to respective burst timing intervals to produce a digital, quadrature position error signal (PES). The demodulator also can include a dibit burst filter with synchronous dibit sampling preferably implemented as a Hilbert Transform filter. Alternatively, the demodulator does not include a filter and a squarer and, instead, the squarer comprises a sum-and-squarer that sums the squares of odd and even digitized samples. In another embodiment, the system employs a digital demodulator having a digital squarer that removes any phase component of the digitized servo information signal and includes a burst signal accumulator that accumulates the squared terms according to respective burst timing intervals to produce the PES. The demodulator may include a filter comprising a harmonic notch filter. A spilt burst servo pattern for the servo control system is comprised of half-width transitions that can be written in a signal pass of a recording head and therefore has no phase misalignment between adjacent flux patterns.

US Patent:

20160241192, Aug 18, 2016

Filed:

Feb 13, 2015

Appl. No.:

14/622591

Inventors:

- San Diego CA, US
Alberto CICALINI - Viguzzolo, IT
Thinh Cat NGUYEN - San Jose CA, US
Mohammad Bagher VAHID FAR - San Jose CA, US
Jesse Aaron RICHMOND - Oakland CA, US

International Classification:

H03D 7/14
H03D 7/16

Abstract:

A method, an apparatus, and a system product for mixing radio frequency signals are provided. In one aspect, the apparatus is configured to perform switching of switches based on first, second, third, and fourth phased half duty clock signals. The apparatus convolves a differential input signal on a differential input port with the first, second, third, and fourth phased half duty cycle clock signals to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port. The first, second, third, and fourth phased half duty cycle clock signals are of the same frequency and out of phase by a multiple of ninety degrees with respect to each other.

US Patent:

20160020752, Jan 21, 2016

Filed:

Jul 15, 2014

Appl. No.:

14/331685

Inventors:

- San Diego CA, US
Cheng-Han Wang - San Jose CA, US
Jesse Aaron Richmond - Oakland CA, US
Thinh Cat Nguyen - San Jose CA, US
Abbas Komijani - Mountain View CA, US
Yashar Rajavi - Mountain View CA, US
Alireza Khalili - Sunnyvale CA, US

International Classification:

H03H 17/02

Abstract:

A method and apparatus for minimizing transmit signal interference is provided. The method includes the steps of: receiving a signal and amplifying the received signal. The received signal is then mixed with an intermediate frequency signal to obtain a baseband modulated signal. The baseband modulated signal is first filtered in an RC filter. The resulting signal is then divided by a preselected amount and the first divided portion is sent to a main path of a biquad filter, which produces a first stage biquad filtered signal. The second portion of the divided signal is sent to an auxiliary path of the biquad filter, and produces a second filtered signal. The first and second signals are then recombined and sent to the second stage of the biquad filter, where further filtering takes place.

Address:

3900 Briargrove Ln APT 3301, Dallas, TX 75287

VIN:

2HGFG11817H522546

Make:

HOND

Model:

CIVI

Year:

2007