Eric E Chang

US Patent:

20140006314, Jan 2, 2014

Filed:

Feb 12, 2013

Appl. No.:

13/765045

Inventors:

Tom Mercer - San Francisco CA, US
Eric Chang - Menlo Park CA, US
Richard Tyler Curtis - Washington DC, US
Daniel J. Yates - Washington DC, US

Assignee:

Opower, Inc. - Arlington VA

International Classification:

G06Q 30/02

US Classification:

705412

Abstract:

Illustrative embodiments of the present invention are directed to methods and computer systems for reporting unusual or anomalous usage or spending of a commodity by consumers. A computer system retrieves a set of usage-information datasets corresponding to a set of consumers, each dataset including past usage of the commodity during at least one of a completed billing period and a current usage of the commodity during the current billing period. The computer system establishes a set of report-trigger conditions for the current billing period, each of the report-trigger conditions corresponding to a consumer. The computer system monitor usage or spending of the set of consumers to determine, for each consumer, whether an estimated usage established for each consumer fulfills the consumer's report-trigger condition. Once the report-trigger condition is fulfilled, the computer system outputs a report to the consumer.

US Patent:

20220245100, Aug 4, 2022

Filed:

Jan 29, 2021

Appl. No.:

17/162474

Inventors:

- Palo Alto CA, US
Eric Ray Chang - San Francisco CA, US
William Edward Gurling - Madison NC, US

International Classification:

G06F 16/21
G06F 16/25
G06F 16/182
G06F 11/14
G06F 3/0482

Abstract:

A cross-platform data migration method and a cross-platform data migration system include determining that a first database is compatible with a second database, receiving a user request associated with an instruction to migrate data from the first database to the second database, determining that backup data corresponding to a current state of the first database is available, mounting the backup data onto the second platform via a distributed file system protocol, converting the backup data from the source endian format to a target endian format, and restoring the backup data in the target endian format to the second platform.

US Patent:

20210073875, Mar 11, 2021

Filed:

Oct 5, 2020

Appl. No.:

17/062686

Inventors:

- Redwood Shores CA, US
Tom MERCER - San Francisco CA, US
Eric CHANG - Menlo Park CA, US
Richard Tyler CURTIS - Washington DC, US
Daniel J. YATES - Washington DC, US

International Classification:

G06Q 30/02

Abstract:

Illustrative embodiments are directed to methods and computer systems for reporting unusual or anomalous usage a commodity by consumers. A computer system retrieves a set of usage-information datasets corresponding to a set of consumers, each dataset including past usage of the commodity during at least one of a completed billing period and a current usage of the commodity during the current billing period. The computer system establishes a set of report-trigger conditions for the current billing period, each of the report-trigger conditions corresponding to a consumer. The computer system may monitor usage or spending of the set of consumers to determine, for each consumer, whether an estimated usage established for each consumer fulfills the consumer's report-trigger condition. Once the report-trigger condition is fulfilled, the computer system outputs a report to the consumer.

US Patent:

20190115925, Apr 18, 2019

Filed:

May 15, 2018

Appl. No.:

15/980467

Inventors:

- Redwood Shores CA, US
Frankie Y. Liu - Palo Alto CA, US
Suwen Yang - Mountain View CA, US
Ziad Saleh Shehadeh - Mountain View CA, US
Eric Y. Chang - San Mateo CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

H03L 7/081
H03L 7/197
H03L 7/099

Abstract:

We disclose a system, which performs a duty-cycle correction operation for an injection-locked phase-locked loop (PLL). The system first obtains a pattern of positive and negative error pulses at rising and falling edges of a reference clock signal for the injection-locked PLL, wherein the pattern specifies deviations of the reference clock signal from a 50% duty cycle. The system multiplies the pattern of positive and negative error pulses by a duty-cycle distortion (DCD) template, which specifies a sign of a duty-cycle error for the reference clock signal, to calculate duty-cycle distortion values. The system then accumulates the duty-cycle distortion values to produce a duty-cycle-error amplitude. Next, the system multiplies the duty-cycle-error amplitude by the DCD template to produce a duty-cycle correction signal. Finally, the system uses the duty-cycle correction signal to compensate for timing errors in the injection-locked PLL, which are caused by duty-cycle variations in the reference clock signal.

US Patent:

20180259797, Sep 13, 2018

Filed:

May 8, 2018

Appl. No.:

15/974313

Inventors:

- Redwood Shores CA, US
Eric Y. Chang - San Mateo CA, US
Frankie Y. Liu - Palo Alto CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G02F 1/01
G02F 1/313
G02F 1/025

Abstract:

In an optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, receives an optical signal that includes a carrier wavelength from an input-output optical waveguide. Then, a monitoring mechanism monitors a performance metric (such as an average power or a signal swing) of a monitor optical signal from the ring-resonator modulator. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the resonance wavelength is locked to the carrier wavelength. In particular, the control logic may apply a change to an adjustment signal that is provided to the ring-resonator modulator. If the change increases the performance metric, the control logic may continue to modify the resonance wavelength. Otherwise, the control logic may modify the resonance wavelength by applying one or more changes, having an opposite sign to the change, to the adjustment signal.

US Patent:

20170010485, Jan 12, 2017

Filed:

Aug 19, 2014

Appl. No.:

14/463654

Inventors:

- Redwood City CA, US
Eric Y. Chang - San Mateo CA, US
Frankie Y. Liu - Palo Alto CA, US

International Classification:

G02F 1/01

Abstract:

In an optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, receives an optical signal that includes a carrier wavelength from an input-output optical waveguide. Then, a monitoring mechanism monitors a performance metric (such as an average power or a signal swing) of a monitor optical signal from the ring-resonator modulator. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the resonance wavelength is locked to the carrier wavelength. In particular, the control logic may apply a change to an adjustment signal that is provided to the ring-resonator modulator. If the change increases the performance metric, the control logic may continue to modify the resonance wavelength. Otherwise, the control logic may modify the resonance wavelength by applying one or more changes, having an opposite sign to the change, to the adjustment signal.

US Patent:

20150160482, Jun 11, 2015

Filed:

Oct 16, 2014

Appl. No.:

14/516301

Inventors:

- Redwood City CA, US
Eric Y. Chang - San Mateo CA, US
Xuezhe Zheng - San Diego CA, US
Frankie Y. Liu - Palo Alto CA, US
Ronald Ho - Mountain View CA, US
Ashok V. Krishnamoorthy - San Diego CA, US

International Classification:

G02F 1/01
G02F 1/025

Abstract:

In the optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, optically couples an optical signal that includes the carrier wavelength from an input optical waveguide to an output optical waveguide. A monitoring mechanism in the optical device, which is optically coupled to the output optical waveguide, monitors a performance metric of an output optical signal from the output waveguide. For example, the monitoring mechanism may monitor: an average optical power associated with the output optical signal, and/or an amplitude of the output optical signal. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the performance metric is optimized.