Bruce M Erickson

US Patent:

8446997, May 21, 2013

Filed:

Jul 2, 2009

Appl. No.:

12/497503

Inventors:

Bruce Erickson - Santa Rosa CA, US

Assignee:

Agilent Technologies, Inc. - Santa Clara CA

International Classification:

H03D 1/04
H03D 1/06
H03K 5/01
H03K 6/04
H04B 1/10
H04L 1/00
H04L 25/08

US Classification:

375346

Abstract:

A method and apparatus for compensating for third-order intermodulation (IM) distortion in a receiver by passing a received signal through a detector to obtain a second-order difference signal, combining the 2nd-order signal with the received signal in a multiplier to obtain a 3rd-order IM signal, adjusting a parameter such as amplitude, phase or quadrature amplitude of the 3rd-order IM signal, and coupling the 3rd-order IM signal into the received signal.

US Patent:

20070139132, Jun 21, 2007

Filed:

Dec 16, 2005

Appl. No.:

11/305740

Inventors:

Joseph Gorin - Santa Rosa CA, US
Bruce Erickson - Santa Rosa CA, US
Darrin Rath - Santa Rosa CA, US

International Classification:

H04B 3/04

US Classification:

333017100

Abstract:

A Ytrium Iron Garnett (YIG) filter tuning system includes a YIG filter having a filter passband and associated filter bandwidth, a noise source selectively coupled to an input of the YIG filter, and a receiver coupled to an output of the YIG filter, the receiver having a measurement passband with an associated measurement bandwidth that is less than the filter bandwidth. The receiver acquires a series of measurements at the output of the YIG filter within the measurement passband and within the filter passband when the noise source is coupled to the input of the YIG filter.

US Patent:

20080082888, Apr 3, 2008

Filed:

Sep 1, 2006

Appl. No.:

11/515056

Inventors:

David W. Murray - Windsor CA, US
Kim Chung Thi Thanh - Rohnert Park CA, US
Bruce A. Erickson - Santa Rosa CA, US

International Classification:

G01R 31/28
G06F 11/00

US Classification:

714742

Abstract:

An apparatus for performing an embedded diagnostic test on a piece of equipment, the equipment including a plurality of components and defining various pathways through respective subsets of the components, comprises an input stimulus generator for generating stimulus signals, coupled to provide the stimulus signals as input to the functionality of the equipment, respective ones of the stimulus signals exercising respective ones of the subsets of components; wherein the stimulus signals include a subset of core stimulus signals, such that a given one of the pathways includes a plurality of segments, different ones of the core stimulus signals exercising different ones of the segments of the given one of the pathways.

US Patent:

20080126868, May 29, 2008

Filed:

Sep 1, 2006

Appl. No.:

11/514426

Inventors:

David W. Murray - Windsor CA, US
Kim Chung Thi Thanh - Rohnert Park CA, US
Bruce A. Erickson - Santa Rosa CA, US
David M. Gallegos - Albany CA, US
Alan N. Wight - Petaluma CA, US

International Classification:

G06F 11/28

US Classification:

714 37, 714E11178

Abstract:

A method is provided for performing a diagnostic test on a piece of equipment, the equipment including a plurality of components, each of the components including a diagnostic test result store. The method comprises executing a diagnostic test by means of a diagnostic apparatus embedded within the piece of equipment, determining, based on the results of the diagnostic test, that one of the components is diagnosed to be faulty, preparing a report of results of the diagnostic test within the diagnostic test store of the faulty component; and storing the report in a test report store on-board the diagnosed faulty component.

US Patent:

40445976, Aug 30, 1977

Filed:

Sep 13, 1976

Appl. No.:

5/723035

Inventors:

Bruce G. Erickson - Santa Clara CA

Assignee:

American Microsystems, Inc. - Santa Clara CA

International Classification:

G04D 712

US Classification:

73 6

Abstract:

A visual tuning-aid system for aligning an electronic timepiece to a correct reference frequency is disclosed. A reference oscillator in the system provides a reference signal at a precisely fixed predetermined frequency which is, or is converted to, the correct alignment frequency for the timepiece. A sensor electrostatically detects a time base signal in the timepiece and a bandpass amplifier removes any extraneous signals. The reference signal and the time base signal are provided to a phase shift indicating device of a multiphase motor in the system which provides a visual display, the movement of which is proportional to the rate of phase change between the reference signal and the time base signal. Alignment of the timepiece to the correct frequency stops the phase change and thereupon the visual display stops moving.

US Patent:

57909458, Aug 4, 1998

Filed:

Jan 9, 1997

Appl. No.:

8/781563

Inventors:

Bruce A. Erickson - Santa Rosa CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H04B 126

US Classification:

455325

Abstract:

A dumbbell shaped resonator efficiently couples IF signals from short transmission lines to an output transmission line at a radio frequency (RF) mixer's IF output port. The RF mixer uses short transmission lines and terminating resistors to match impedances within the mixer and to minimize the mixer's distortion. The RF mixer, including the dumbbell resonator, is constructed on a printed circuit board and has a low manufacturing cost. Alternatively, the output transmission line is center-tapped to provide a pair of IF signals having opposite phases.

US Patent:

40247503, May 24, 1977

Filed:

May 19, 1975

Appl. No.:

5/578606

Inventors:

Bruce G. Erickson - Santa Clara CA

Assignee:

American Micro-systems, Inc. - Santa Clara CA

International Classification:

G04D 712
G01R 2312

US Classification:

73 6

Abstract:

A visual tuning-aid system for aligning an electronic timepiece to a correct reference frequency is disclosed. A reference oscillator in the system provides a reference signal at a precisely fixed predetermined frequency which is, or is converted to, the correct alignment frequency for the timepiece. A sensor electrostatically detects a time base signal in the timepiece and a bandpass amplifier removes any extraneous signals. The reference signal and the time base signal are provided to a phase shift indicating device in the system which provides a visual display, the movement of which is proportional to the rate of phase change between the reference signal and the time base signal. Alignment of the timepiece to the correct frequency stops the phase change and thereupon the visual display stops moving.

US Patent:

55415580, Jul 30, 1996

Filed:

Nov 1, 1994

Appl. No.:

8/333013

Inventors:

Leonard Weber - Windsor CA
Bruce A. Erickson - Santa Rosa CA
Edward M. Barich - Santa Rosa CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03H 700

US Classification:

333174

Abstract:

A wideband bandpass filter has a tank circuit connected between an input and output tapping circuit. The tank circuit contains a variable capacitor and an inductor in parallel. The tank circuit determines a center frequency for the bandpass filter. The input tapping circuit has an input variable impedance, and the output tapping circuit has an output variable impedance. The input and output variable impedances determine the continuously variable bandwidth of the filter.