DOUGLAS GRADY ANDERSON
Pilots at Caldwells Way, Queen Creek, AZ
License number
Arizona A3825065
Issued Date
Mar 2017
Expiration Date
Sep 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
21433 E Caldwells Way E CALDWELLS WAY, Queen Creek, AZ 85142
Professional information
Soft Starting Driver For Piezoelectric Device
US Patent:
2011008, Apr 7, 2011
Filed:
Oct 5, 2009
Appl. No.:
12/587387
Inventors:
Harold Gee Yee - Chandler AZ, US
Douglas James Anderson - Queen Creek AZ, US
Douglas James Anderson - Queen Creek AZ, US
Assignee:
World Properties, Inc. - Lincolnwood IL
International Classification:
G05F 1/10
US Classification:
323283, 323282
Abstract:
A driver includes a boost converter, a pulse width modulator controlling the boost converter, and a timer controlling the pulse width modulator. The timer, such as a digital counter, causes the pulse width modulator to produce narrow pulses unless or until the end of a period is reached, at which point the pulse width modulator is not controlled by the timer.
Driver For Piezoelectric Actuator
US Patent:
2011012, May 26, 2011
Filed:
Nov 24, 2009
Appl. No.:
12/592353
Inventors:
Douglas James Anderson - Queen Creek AZ, US
Harold Gee Yee - Chandler AZ, US
Harold Gee Yee - Chandler AZ, US
Assignee:
World Properties, Inc. - Lincolnwood IL
International Classification:
H01L 41/04, H03B 1/00
US Classification:
318116, 327108
Abstract:
A driver for a piezoelectric actuator includes a pulse width modulator and an output amplifier packaged as a single semiconductor device, preferably on a single semiconductor die. The driver includes a first boost converter that supplies power to the output amplifier, which preferably has programmable gain. A second amplifier, for driving the gate of a switching transistor in the first boost converter, is powered by a second boost converter. The piezoelectric actuator provides tactile feedback for the keyboard or the display in a battery operated electronic device.
Reduced Power Consumption For Boost Converter
US Patent:
2012022, Sep 13, 2012
Filed:
Mar 9, 2011
Appl. No.:
12/932884
Inventors:
Karl Edward Sprentall - Scottsdale AZ, US
Douglas James Anderson - Queen Creek AZ, US
Douglas James Anderson - Queen Creek AZ, US
Assignee:
Rogers Corporation - Rogers CT
International Classification:
G05F 1/10
US Classification:
323282
Abstract:
A signal for controlling output voltage from the driver is modulated by the input signal to the driver, whereby the output voltage tracks the input signal, matching power to demand. The output storage capacitor can be reduced in size because the amount of energy that needs to be stored is reduced. In addition, feedback transistors are paired on the same substrate and cause opposite changes in response to changes in temperature, thereby automatically compensating for changes in temperature without the use of additional components.
Direct Drive Waveform Generator
US Patent:
8536906, Sep 17, 2013
Filed:
Jun 10, 2011
Appl. No.:
13/134559
Inventors:
Karl Edward Sprentall - Scottsdale AZ, US
Douglas James Anderson - Queen Creek AZ, US
Douglas James Anderson - Queen Creek AZ, US
Assignee:
Rogers Corporation - Rogers CT
International Classification:
H03B 1/00, H03K 3/00
US Classification:
327109, 327108, 327110
Abstract:
A high voltage waveform is generated that is similar to a low voltage input waveform. The high voltage waveform is a series of pulses that are applied directly to the device. An error signal controls the frequency, magnitude, and duration of the pulses. A feedback signal derived from the high voltage waveform is compared with the input waveform to produce the error signal.