Bruce C Wall

US Patent:

7269239, Sep 11, 2007

Filed:

Jul 31, 2002

Appl. No.:

10/208014

Inventors:

Daniel A Staver - Colorado Springs CO, US
Bruce Carl Wall - Colorado Springs CO, US
Tue Tran - Colorado Springs CO, US

Assignee:

EM Microelectronic-Marin SA - Marin

International Classification:

H04L 7/00

US Classification:

375357, 375354, 375377, 323298, 323354

Abstract:

A two-wire communication protocol between a controller device and a controlled device, wherein both devices are coupled by a clock line and a data line. The controller device sends control signals comprising N bits, N being greater than or equal to two, to the controlled device via the data line. Each bit of said control signals is latched onto the controlled device on consecutive edges of a clock signal sent by the controller device to the controlled device on the clock line.

US Patent:

20020186070, Dec 12, 2002

Filed:

Jun 7, 2001

Appl. No.:

09/876537

Inventors:

Bruce Wall - Colorado Springs CO, US
John Arachtingi - Colorado Springs CO, US

Assignee:

EM (US) Design, Inc.

International Classification:

H02J001/00

US Classification:

327/530000

Abstract:

A power stealing circuit to charge a capacitor includes a passive electrical power channel. The passive electrical power channel has an input connected to an input signal and an output designed to be connected to the capacitor. An active electrical power channel is powered by the capacitor. The active electrical power channel has an input connected to the input signal and an output connected to the capacitor.

US Patent:

20030016121, Jan 23, 2003

Filed:

Jul 18, 2001

Appl. No.:

09/908280

Inventors:

Bruce Wall - Colorado Springs CO, US

Assignee:

EM Microelecronic - (US), Inc.

International Classification:

H04Q005/22

US Classification:

340/010300

Abstract:

A system for identifying radio frequency tags includes a radio frequency device reader for reading a plurality of radio frequency identification tags. The radio frequency device reader has a start at a predetermined bit command. The plurality of radio frequency identification tags are capable of responding to the start at a predetermined bit command.

US Patent:

20100039267, Feb 18, 2010

Filed:

Aug 13, 2008

Appl. No.:

12/191092

Inventors:

Bruce Carl Wall - Colorado Springs CO, US
Dean Allum - Colorado Springs CO, US

Assignee:

EM MICROELECTRONIC-MARIN SA - Marin

International Classification:

G08B 13/14

US Classification:

3405725

Abstract:

The present invention relates to a radio-frequency identification tag () and a related method of operation, whereby the tag comprises an antenna () being adapted to draw a voltage from an externally applied RF field having a first frequency, and further comprises a tunable antenna resonant circuit () comprising a default resonance frequency and having tuning means () for shifting the resonance frequency to the first frequency, whereby non-volatile storage means () for storing frequency related data are provided, that are accessible at a reduced voltage level, which is below a “power-up” voltage level of the tag's operating unit ().