Edward C Gee

US Patent:

7251577, Jul 31, 2007

Filed:

Jul 19, 2004

Appl. No.:

10/894707

Inventors:

Kyle L. Bernard - Tigard OR, US
Edward C. Gee - Portland OR, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06F 19/00

US Classification:

702124, 370252, 348725

Abstract:

A realtime power mask trigger generator for an instrument that acquires data in response to a trigger signal integrates power amplitudes over a defined bandwidth within a frequency spectrum for an input signal to produce an average signal power, and compares the average signal power with a specified reference power level for the defined bandwidth. Violation of the reference power level by the average signal power generates the trigger signal for acquiring data from the input signal about the trigger event by the instrument. The frequency spectrum may be divided into more than one defined frequency bandwidth, and each defined frequency bandwidth may have its own specified reference power level. The defined frequency bandwidths and associated reference power levels define a realtime power mask trigger.

US Patent:

7418357, Aug 26, 2008

Filed:

Jan 19, 2007

Appl. No.:

11/655682

Inventors:

Kyle L. Bernard - Tigard OR, US
Edward C. Gee - Camas WA, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06F 19/00

US Classification:

702 76

Abstract:

A realtime power mask trigger generator for an instrument that acquires data in response to a trigger signal integrates power amplitudes over a defined bandwidth within a frequency spectrum for an input signal to produce an average signal power, and compares the average signal power with a specified reference power level for the defined bandwidth. Violation of the reference power level by the average signal power generates the trigger signal for acquiring data from the input signal about the trigger event by the instrument. The frequency spectrum may be divided into more than one defined frequency bandwidth, and each defined frequency bandwidth may have its own specified reference power level. The defined frequency bandwidths and associated reference power levels define a realtime power mask trigger.

US Patent:

7765086, Jul 27, 2010

Filed:

Dec 9, 2004

Appl. No.:

11/009161

Inventors:

Marcus K. Dasilva - Portland OR, US
Edward C. Gee - Portland OR, US
Yi He - Portland OR, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06F 11/30

US Classification:

702183

Abstract:

A modulation domain trigger generator demodulates a modulated input signal to extract information content, and a trigger is generated from the extracted information content in response to specified trigger criteria. The modulation domain trigger generator may be combined with a plurality of different types of trigger generators, including frequency domain and time domain trigger generators, to process the input signal in response to different trigger criteria to produce more than one trigger. The different trigger outputs may be combined to produce an acquisition trigger to acquire data surrounding an anomalous or identifiable event within the input signal.

US Patent:

8489350, Jul 16, 2013

Filed:

Sep 28, 2009

Appl. No.:

12/568141

Inventors:

Kathryn A. Engholm - Portland OR, US
Edward C. Gee - Camas WA, US
David Eby - Aloha OR, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G01R 15/00
G01R 23/00
G06F 19/00
G06F 17/40

US Classification:

702 66, 324 7613, 324 7616, 346 46, 377 13, 702180, 702187, 702189, 708212

Abstract:

An RF test and measurement device, including a front end for receiving a time-varying signal and a real-time engine for generating digital frequency domain spectrums based on the time-varying signal. The device also includes a memory subsystem containing a frequency domain bitmap which is updated through sequential receipt and storage of the digital frequency domain spectrums. The real time engine is further configured to monitor the frequency domain bitmap for occurrence of a signal characteristic, and in response to detection of the signal characteristic, cause a capture of the time-varying signal into a storage location of the RF test and measurement device.

US Patent:

20050057253, Mar 17, 2005

Filed:

Sep 3, 2003

Appl. No.:

10/655513

Inventors:

Edward Gee - Portland OR, US
Alfred Hillman - Banks OR, US
Richard Cameron - Portland OR, US
Antti Sivula - Portland OR, US

International Classification:

G01R031/00

US Classification:

324409000

Abstract:

A digital phosphor spectrum analyzer (DPSA) uses a fast rasterization and decay process to emulate the look and feel of an analog phosphor display while improving the ratio of waveform acquisition to non-acquisition time. Multiple acquisitions of complex digital data for an input signal being analyzed across a frequency span are accumulated in a raster memory at a waveform update rate to produce a composite waveform. A decay function is applied to the composite waveform to produce a display waveform. The display waveform is viewed on a display device at a display update rate, resulting in the ability to see otherwise unobservable frequency characteristics of the input signal.

US Patent:

20080052335, Feb 28, 2008

Filed:

Aug 1, 2006

Appl. No.:

11/497947

Inventors:

Edward C. Gee - Camas WA, US

International Classification:

G06F 17/14

US Classification:

708400

Abstract:

A method for time domain to frequency domain conversion is described. Time-domain input data is obtained. The input data is converted from the time domain to the frequency domain to provide frequency-domain data. Frequency-shifted time-domain data is produced. The frequency shifted time-domain data is converted from the time domain to the frequency domain to provide frequency-shifted frequency-domain data. The frequency-domain data is combined with the frequency-shifted frequency-domain data to produce combined frequency-domain data. The frequency-domain data is provided for further processing by a test and measurement system.

US Patent:

20110055445, Mar 3, 2011

Filed:

Mar 15, 2010

Appl. No.:

12/724376

Inventors:

Edward Gee - Camas WA, US
Keith Slavin - Beaverton OR, US
Robert Batten - Tualatin OR, US
Vincenzo DiTommaso - Beaverton OR, US
Ravindranath Naiknaware - Portland OR, US
Triet Tu Le - Tualatin OR, US
Adam Heiberg - Tualatin OR, US
Dennis Morel - Lake Oswego OR, US

Assignee:

AZURAY TECHNOLOGIES, INC. - Tualatin OR

International Classification:

G06F 9/302
G06F 12/02
G06F 13/24

US Classification:

710260, 712221, 711154, 712241, 711E12002, 712E09017

Abstract:

A signal processing system may include a multiply-accumulate (MAC) unit to generate output data by performing multiply-accumulate operations on first and second input data in response to a stream of MAC instruction words, where the MAC unit is pipelined to enable it to perform a multiply-accumulate operation in response to each MAC instruction word. The system may also include an instruction generator to generate the stream of MAC instruction words by performing loop expansion on a stream of intermediate instruction words, where one intermediate instruction word may comprise a group of fields to set up the MAC unit to execute in response to the one intermediate instruction word.

US Patent:

20110160930, Jun 30, 2011

Filed:

Dec 17, 2010

Appl. No.:

12/972398

Inventors:

Robert Batten - Tualatin OR, US
Vincenzo DiTommaso - Beaverton OR, US
Gary B. Baker - Sherwood OR, US
Henry F. Pruett - North Bend OR, US
Adam Heiberg - Tualatin OR, US
Triet Tu Le - Portland OR, US
Edward Gee - Camas WA, US

Assignee:

AZURAY TECHNOLOGIES, INC. - Portland OR

International Classification:

G06F 1/26
H02J 1/00

US Classification:

700298, 700297, 307 82

Abstract:

A local power converter may include a controller to manipulate the operating point of a local power converter to cause the power point tracking feature of a central power converter to operate at a point determined by the controller. In some embodiments, the controller can manipulate the operating point of the local power converter by alternating between at least two modes. In some other embodiments, the controller can manipulate the operating point of the local power converter to provide a substantially constant slope. In some other embodiments, the controller can maintain a substantially constant impedance ratio. In some other embodiments, the controller enables perturbations from the power point tracking feature of the central power converter to reach the power source.