Scott W Evans
Electrician at Orch Pl F35, Fort Collins, CO
License number
Colorado 27420
Issued Date
Jan 25, 2002
Renew Date
Jun 16, 2003
Expiration Date
Dec 23, 2003
Type
Electrical Apprentice
Address
Address
2154 W Orchard Pl, Fort Collins, CO 80521
Professional information
Motion-Detector Circuitry With Adjustable Background Lighting Level
US Patent:
6225748, May 1, 2001
Filed:
Dec 30, 1999
Appl. No.:
9/476421
Inventors:
Scott T. Evans - Fort Collins CO
Wade Lee - Danville CA
Wade Lee - Danville CA
Assignee:
Cordelia Lighting, Inc. - Rancho Dominguez CA
International Classification:
H05B 3700
US Classification:
315159
Abstract:
A circuit arrangement according to the invention is intended to be used in a PIR motion-activated lighting fixture of the type that includes a triac for energizing the light from the AC power mains and a triac firing circuit for firing the triac in response to motion. To provide the accent lighting level and to control the magnitude of that level, the circuitry includes a window comparator, in which the thresholds are set to defining a dimming window, and a filter circuit responsive to the AC power line and providing an input signal to the window comparator. The filter circuit includes a circuit arrangement for shifting the phase of the input signal with respect to the AC power line signal and for contemporaneously scaling the amplitude of the input signal with respect to the AC power line signal such that the peak amplitude of the input signal diminishes as the phase shift of the input signal increases. That is to say, the amplitude and the phase shift of input signal to the window comparator are scaled together. The magnitude of the phase shift and concomitant amplitude scaling may be set by the user.
Interfaces, Circuits, And Methods For Communicating With A Double Data Rate Memory Device
US Patent:
8234422, Jul 31, 2012
Filed:
Sep 11, 2009
Appl. No.:
12/557658
Inventors:
David Linam - Fort Collins CO, US
Benjamin P. Haugestuen - Fort Collins CO, US
Scott T. Evans - Fort Collins CO, US
Benjamin P. Haugestuen - Fort Collins CO, US
Scott T. Evans - Fort Collins CO, US
Assignee:
Avago Technologies Enterprise IP (Singapore) Pte. Ltd - Singapore
International Classification:
G06F 3/00, G06F 5/00, G11C 7/00, G11C 7/22
US Classification:
710 52, 365189011
Abstract:
An input/output interface reads data from and writes data to a DDR memory. The interface includes data and strobe circuits. The strobe circuit includes preamble logic, a first counter operating with a strobe clock, a second counter operating with an ASIC-generated clock, a strobe park circuit and a first synchronizer. The preamble logic receives strobe signals from the DDR memory and generates a preamble signal. The first counter generates a first input of the strobe park circuit. The second counter generates a second input of the strobe park circuit. The strobe park circuit controllably replaces the strobe signals from the DDR memory with respective non-transitioning signals when data is not being read. The data circuit includes a FIFO buffer and a second synchronizer. The FIFO buffer receives data with the strobe clock.