David Kang

7463874, Dec 9, 2008

Oct 18, 2004

10/968551

David Dukho Kang - Fullerton CA, US
Chun-Huat Heng - Singapore, SG

Chrontel, Inc. - San Jose CA

H04B 1/18

455285, 455213

A fully-integrated tuner for performing signal channel selection and image rejection in an analog cable television system is provided. Various embodiments disclose a tuner including an analog RF section to process an analog RF input signal and generate complex low intermediate frequency digital signals, and a signal processing section configured to reduce image and signal leakage in the complex low intermediate frequency signals. The signal processing section selects a signal channel of the complex low intermediate frequency signals and suppresses channel components adjacent to the signal channel. In one embodiment, the signal processing section includes a complex digital signal channel select filter to select the signal channel and suppress the adjacent channel components. In other embodiments, the complex digital signal channel select filter selects the signal channel, shapes the selected signal channel to generate a shaped signal channel, and equalizes a group delay of the shaped signal channel.

20050090213, Apr 28, 2005

Apr 30, 2004

10/836545

Chun Heng - La Jolla CA, US
Manoj Gupta - La Jolla CA, US
Sanghoon Lee - Chuncheon-si, KR
David Kang - Fullerton CA, US

H04B001/18

455154100, 455150100

A tuner and demodulator performing image rejection in an analog cable television system. Various embodiments disclose a tuner including an analog RF section to generate a complex intermediate frequency digital signal, an image rejection module configured to perform image rejection on the complex intermediate frequency digital signal to generate an enhanced image rejection signal, a signal channel select filter configured to perform digital on-chip filtering on the enhanced image rejection signal to generate a filtered signal, and a demodulator configured to demodulate the filtered signal to generate digital output signals. In some embodiments, the tuner is substantially or fully monolithic. In some embodiments, the tuner performs image rejection by applying an algorithm to estimate a signal correlation between the signal band and the image band of the complex intermediate frequency digital signal, and providing adaptive filtering to reduce signal leakage and image leakage.

20100130958, May 27, 2010

Nov 26, 2008

12/324562

David Kang - Encinitas CA, US
Monica Zepeda - San Diego CA, US

A61M 5/158

604506, 604239

The present invention provides infusion devices and methods for subcutaneous delivery of high viscosity fluids. The devices and methods described are innovative subcutaneous infusion systems that allow for the rapid delivery of viscous therapeutic fluids while avoiding adverse side effects and promoting patient comfort. The devices and methods described are also useful for rapid delivery of high volumes of therapeutic fluids.

20210114134, Apr 22, 2021

Oct 18, 2019

16/658010

Hong Kang - San Marino CA, US
David Kang - San Marino CA, US

B23K 11/30

The seam welder conductive mechanism is the main part of the resistance seam welding machine. When the electrode wheel rolling on the welded parts, the Seam welder conductive mechanism will withstand the high press of electrode force and pass the high welding current from welding transformer to the electrode wheels of seam welding machine. Because of these two characteristics the following factors must be considered during the design of seam welder conductive mechanism. First of all, in order to withstand the high press of electrode force two bearings are introduced in the mechanism, the bearing should be lubricated and also isolated from the welding current in order to get long working time without damaging the bearing. Second of all, in order to pass the high welding current, the conductive pair with relative motion must be keep conduction all the time with certain surface pressure and lubrication, the conductive pair without relative motion must be keep conduction all the time with big surface pressure. Because of the high current pass through the conductive mechanism must be cooled with water during working. This is a mechanism equipped with water cooling for Electrode, main shaft, and Silver-plate conductive pads.