Gregory G Uehara

6459684, Oct 1, 2002

Feb 16, 1999

09/250426

Cormac S. Conroy - Sunnyvale CA
Samuel W. Sheng - Santa Clara CA
Gregory T. Uehara - Honolulu HI

LSI Logic Corporation - Milpitas CA

H04B 320

370286, 370494, 370208, 379410

An ADSL central office transmission system for transmitting downstream DMT signals to a plurality of remote ADSL transceiver is disclosed. The system includes a DMT digital signal transceiver that generates a time division multiplexed digital signal that includes a plurality of DMT signals to be sent on a plurality of ADSL lines. A digital to analog converter converts the time division multiplexed digital signal into a time division multiplexed analog signal that includes a plurality of analog DMT signals. The analog to digital converter has an output that outputs the time division multiplexed analog signal. A switch selectively connects the output of the digital to analog converter to each of a plurality of transmitters. The transmitters are configured to drive the plurality of ADSL lines. Thus, the plurality ADSL lines are driven by the plurality of analog DMT signals.

20140044224, Feb 13, 2014

Oct 22, 2013

14/060119

- St. Michael, BB
Gregory Uehara - Kaneohe HI, US
Sehat Sutardja - Los Altos Hills CA, US

Marvell World Trade Ltd. - St. Michael

H04B 1/10

375350

A system including a filter and a downconverter. The filter is configured to receive, from a node, (i) a first signal and (ii) a second signal, and filter the second signal. The filter includes a first input impedance. The filter comprises a first plurality of switches and a first circuit. The first plurality of switches is configured to communicate with the node. The first plurality of switches is clocked at a first frequency. The first frequency is based on a frequency of the first signal. The first circuit is configured to communicate with an output of the plurality of switches. The first circuit includes a second input impedance. The second input impedance is different than the first input impedance. The downconverter is configured to (i) receive the first signal and (ii) downconvert the first signal. The filter and the downconverter are connected in parallel to the node.

62750984, Aug 14, 2001

Oct 1, 1999

9/411342

Gregory T. Uehara - Honolulu HI
Samuel Sheng - San Jose CA
Cormac Conroy - Sunnyvale CA

LSI Logic Corporation - Milpitas CA

G05F 316

327539

A system and method for compensating for a voltage offset between an inverting input and a noninverting input of an op amp to provide a stable bandgap reference. The method including measuring the voltage offset between the inverting input and the noninverting input of the op amp and searching for a compensating current input to the op amp that compensates for the voltage offset. A programmable current source is set to output the compensating current to the op amp.

63302748, Dec 11, 2001

Sep 7, 1999

9/391117

Gregory T. Uehara - Honolulu HI

University of Hawaii - Honolulu HI

H04B 1707

375150

The present invention is a correlator for use in spread spectrum applications which utilizing continuous-time analog domain signal processing. The correlator include a multiplier which is coupled to an integration capacitance, and an integration reset circuit which is coupled to the integration capacitance. The correlator is designed to receive a first input signal and a second input signal. The multiplier multiplies the first input signal and the second input signal to produce a multiplier output current. The multiplier output current is then integrated by the integration capacitance which produces a correlator output voltage. The integration reset circuit then reset the integration capacitance to a reset voltage.

20160134315, May 12, 2016

Nov 10, 2015

14/937821

- St. Michael, BB
Gregory T. UEHARA - Kailua HI, US
Marc LEROUX - Austin TX, US
Zhiguo WANG - Austin TX, US
Jari Juhani VAHE - Austin TX, US
Rohit MAINKAR - Austin TX, US

H04B 1/10
H04B 1/12

A circuit comprises a vector separator circuit to generate a first extracted signal according to (i) a first correlation signal, (ii) a second correlation signal, and (iii) a relative response signal. The first correlation signal corresponds to a first correlation between an input signal and a first test signal. The first test signal has a first frequency, and the input signal includes a first spur having the first frequency. The second correlation signal corresponds to a second correlation between the input signal and a second test signal. The second test signal has a second frequency. The relative response signal corresponds to a relative response of the second frequency in the first correlation signal.