John D Phan

US Patent:

7554471, Jun 30, 2009

Filed:

Nov 1, 2006

Appl. No.:

11/591231

Inventors:

Kenneth Kung-Juh Tsai - Palos Verde Estates CA, US
John Chan Phan - Garden Grove CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H03M 1/20

US Classification:

341131

Abstract:

A system and method for improving the linearity of a digital-to-analog converter (DAC) is provided. In one embodiment, the system comprises a digital waveform generator that generates a digital sequence associated with a desired analog waveform and a pseudo-random noise component that provides a pulse shaped band limited pseudo-random noise sequence. The system further includes a combiner configured to combine the digital sequence and the pulse shaped band limited pseudo-random noise sequence and provide the combined sequence to the DAC.

US Patent:

8310292, Nov 13, 2012

Filed:

Jul 13, 2011

Appl. No.:

13/182440

Inventors:

John T. Phan - Sugar Land TX, US

Assignee:

Nanya Technology Corp. - Kuelshan, Tao-Yuan Hsien

International Classification:

H03L 7/06

US Classification:

327158, 327142, 327149, 327161

Abstract:

A DLL system that automatically resets after a frequency change of an external clock according to a phase difference includes: a clock receiver for receiving the external clock and generating a clock signal; a delay line, coupled to the clock receiver, for generating a delayed clock signal; a control loop, for tracking a phase difference between the clock signal and the delayed clock signal and locking the delay line when the phase difference is zero; and an N degrees phase detector (PD), coupled to the control loop, for detecting the phase difference between the clock signal and the delayed clock signal and outputting a positive signal when the detected phase difference is greater than N degrees, wherein the positive signal generates a reset signal to the DLL system.

US Patent:

20060253323, Nov 9, 2006

Filed:

Mar 14, 2006

Appl. No.:

11/374882

Inventors:

John Phan - Houston TX, US
Allen Easty - Plano TX, US

Assignee:

Optical Entertainment Network, Inc. - Houston TX

International Classification:

G06Q 30/00
H04N 7/10

US Classification:

705014000, 725032000

Abstract:

An online targeted advertising system comprises a first interface operable to enable a TV program distributor to access an online targeted advertising exchange and identify ad avails as commodities, a second interface operable to enable a TV-viewing household to access the online targeted advertising exchange and carry out transactions related to the identified ad avails, and a third interface operable to enable an advertiser to access the online targeted advertising exchange and carry out transactions related to the identified ad avails.