Sung Eun Choi

US Patent:

62118560, Apr 3, 2001

Filed:

Apr 17, 1998

Appl. No.:

9/062364

Inventors:

Sung M. Choi - Los Altos CA
Jan Van Ee - San Jose CA

International Classification:

G09G 526
G06F 300
G06T 340

US Classification:

345130

Abstract:

A graphical user interface "touch screen" having an entire collection of icons displayed at a scale in which the individual function of each icon is recognizable, but too small to easily access features of the function, and wherein upon touching the screen area accommodating an area of the icon, the screen provides a zoomed in version of that area so that the user can select a desired feature.

US Patent:

20200127739, Apr 23, 2020

Filed:

Dec 19, 2019

Appl. No.:

16/720472

Inventors:

- Santa Clara CA, US
Sung CHOI - Santa Clara CA, US
James STEWART - Santa Clara CA, US
Radhakrishnan L. NAGARAJAN - Santa Clara CA, US
Paul YU - Santa Clara CA, US
Ilya LYUBOMIRSKY - Santa Clara CA, US

International Classification:

H04B 10/61
H04B 17/20
G02B 6/293
G02B 6/12
H04L 27/18
H04B 10/69
H04B 10/67
H04B 10/079

Abstract:

The present invention is directed to a communication signal tracking system comprising an optical receiver including one or more delay line interferometers (DLIs) configured to demultiplex incoming optical signals and a transimpedance amplifier configured to convert the incoming optical signals to incoming electrical signals. The communication signal tracking system further includes a control module configured to calculate a bit-error-rate (BER) of the incoming electrical signals before forward-error correction decoding, and use the BER as a parameter for optimizing settings of the one or more DLIs in one or more iterations in a control loop and generating a back-channel data.

US Patent:

20190268075, Aug 29, 2019

Filed:

May 9, 2019

Appl. No.:

16/408256

Inventors:

- Santa Clara CA, US
Sung CHOI - Santa Clara CA, US
James STEWART - Santa Clara CA, US
Radhakrishnan L. NAGARAJAN - Santa Clara CA, US
Paul YU - Santa Clara CA, US
Ilya LYUBOMIRSKY - Santa Clara CA, US

International Classification:

H04B 10/61
H04B 17/20
G02B 6/293
G02B 6/12
H04L 27/18
H04B 10/69
H04B 10/67

Abstract:

The present invention is directed to a communication signal tracking system comprising an optical receiver including one or more delay line interferometers (DLIs) configured to demultiplex incoming optical signals and a transimpedance amplifier configured to convert the incoming optical signals to incoming electrical signals. The communication signal tracking system further includes a control module configured to calculate a bit-error-rate (BER) of the incoming electrical signals before forward-error correction decoding, and use the BER as a parameter for optimizing settings of the one or more DLIs in one or more iterations in a control loop and generating a back-channel data.

US Patent:

20180375587, Dec 27, 2018

Filed:

Jun 26, 2017

Appl. No.:

15/633353

Inventors:

- Santa Clara CA, US
Sung CHOI - Santa Clara CA, US
James STEWART - Santa Clara CA, US
Radhakrishnan L. NAGARAJAN - Santa Clara CA, US
Paul YU - Santa Clara CA, US
Ilya LYUBOMIRSKY - Santa Clara CA, US

International Classification:

H04B 10/61
H04B 10/67
H04B 10/69
H04L 27/18
G02B 6/12
G02B 6/293
H04B 17/20

Abstract:

The present invention is directed to a communication signal tracking system comprising an optical receiver including one or more delay line interferometers (DLIs) configured to demultiplex incoming optical signals and a transimpedance amplifier configured to convert the incoming optical signals to incoming electrical signals. The communication signal tracking system further includes a control module configured to calculate a bit-error-rate (BER) of the incoming electrical signals before forward-error correction decoding, and use the BER as a parameter for optimizing settings of the one or more DLIs in one or more iterations in a control loop and generating a back-channel data.