Chen Mei L Zhang

US Patent:

56752458, Oct 7, 1997

Filed:

Sep 15, 1995

Appl. No.:

8/529625

Inventors:

Douglas James Millar - Vancouver WA
Tai Won Youn - Vancouver WA
Chen Zhang - Vancouver WA

Assignee:

Sharp Microelectronics Technology, Inc. - Camas WA
Sharp Kabushiki Kaisha - Osaka

International Classification:

G01R 1510

US Classification:

324 95

Abstract:

A control circuit which regulates an ac power output device. The control circuit is operatively connected to the ac power output and measures the ac signal with a diode to generate a control signal stimulus. A second diode is operatively connected to the power measuring diode so that the two diodes have the same voltage drops associated with the quiescent operation of the diodes. Quiescent voltage changes in the power measuring diode are canceled by the matching quiescent voltage change in the second diode. In this manner, power measurement errors associated with diode quiescent voltage changes are minimized.

US Patent:

20230085608, Mar 16, 2023

Filed:

Nov 9, 2022

Appl. No.:

17/983920

Inventors:

Ali Ebrahimi Afrouzi - Henderson NV, US
Lukas Robinson - York, CA
Chen Zhang - Redmond WA, US
Brian Highfill - Castro Valley CA, US
Amin Ebrahimi Afrouzi - Berkeley CA, US

Assignee:

AI Incorporated - Toronto ON

International Classification:

B25J 9/16
G06T 7/70
G05D 1/02
G06T 7/579
G06T 5/50
B25J 5/00
G06V 20/10

Abstract:

Provided is a robot including a chassis; a set of wheels coupled to the chassis; a plurality of sensors; a processor; and a tangible, non-transitory, machine readable medium storing instructions that when executed by the processor effectuates operations. The operations include capturing, with an image sensor disposed on the robot, a plurality of images of an environment of the robot as the robot navigates within the environment; identifying, with the processor, an obstacle type of an obstacle captured in an image based on a comparison between features of the obstacle and features of obstacles with different obstacles types stored in a database; and determining, with the processor, an action of the robot based on the obstacle type of the obstacle.

US Patent:

20180123770, May 3, 2018

Filed:

Dec 7, 2017

Appl. No.:

15/834739

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H04L 5/14
H04B 7/04
H04B 1/00

Abstract:

The described technology provides front-end antenna architecture for wireless communication that manages multiple frequency sub-bands in a manner that results is a low insertion loss rate. Further, the components of the architecture are smaller than typical wireless communication antenna architectures, and therefore the described architecture can be accommodated in a smaller area than typical architectures without a decrease in efficiency. A matching circuit is communicatively connected to each frequency sub-band's respective signal path. When two or more sub-bands are requested for high-speed wireless communication, the matching circuits match the impedance of each sub-band with one-another. Matching the impedance allows two or more sub-bands to be used to wirelessly communicate while maintaining high efficiency. The matching circuits are disabled when only one sub-band is needed for wireless communication.

US Patent:

20170207534, Jul 20, 2017

Filed:

Jan 19, 2016

Appl. No.:

15/001008

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H01Q 5/335

Abstract:

The described technology provides an antenna interface for wireless communication that allows the use of a single transmission line trace between at least one antenna and a transceiver of a wireless communications device. The components of the antenna interface include a first set of filters, a set of low noise amplifiers (LNAs) and a second set of filters. The antenna interface, which is communicatively coupled to the single transmission line trace, avoids the use of a coaxial cable and reduces issues related to the use of multiple transmission line traces.

US Patent:

20170093552, Mar 30, 2017

Filed:

Sep 30, 2015

Appl. No.:

14/871219

Inventors:

- Redmond WA, US
Chen Zhang - Sammamish WA, US

International Classification:

H04L 5/14
H04B 7/04

Abstract:

The described technology provides front-end antenna architecture for wireless communication that manages multiple frequency sub-bands in a manner that results is a low insertion loss rate. Further, the components of the architecture are smaller than typical wireless communication antenna architectures, and therefore the described architecture can be accommodated in a smaller area than typical architectures without a decrease in efficiency. A matching circuit is communicatively connected to each frequency sub-band's respective signal path. When two or more sub-bands are requested for high-speed wireless communication, the matching circuits match the impedance of each sub-band with one-another. Matching the impedance allows two or more sub-bands to be used to wirelessly communicate while maintaining high efficiency. The matching circuits are disabled when only one sub-band is needed for wireless communication.