James A Joy

US Patent:

7236092, Jun 26, 2007

Filed:

Aug 23, 2004

Appl. No.:

10/923763

Inventors:

James A. Joy - Acworth GA, US

International Classification:

G08B 1/08
H04Q 7/00

US Classification:

34053912, 3405721, 600300

Abstract:

A passive sensor system having the capacity to respond to a variety of stimuli in the form of pulses of a specified frequency. The system includes a sensor operatively connected to an LC circuit characterized by a quality factor (Q) of less than 200, and a high Q resonator having a Q greater than 200.

US Patent:

7245117, Jul 17, 2007

Filed:

Apr 13, 2005

Appl. No.:

11/105294

Inventors:

James Joy - Woodstock GA, US
Jason Kroh - Villa Rica GA, US
Michael Ellis - Alpharetta GA, US
Mark Allen - Atlanta GA, US
Wilton Pyle - Marietta GA, US

Assignee:

CardioMEMS, Inc. - Atlanta GA

International Classification:

G01R 23/12
G01R 35/00

US Classification:

324 7653, 324601, 324 7652

Abstract:

The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.

US Patent:

7550978, Jun 23, 2009

Filed:

Dec 20, 2006

Appl. No.:

11/613645

Inventors:

James Joy - Woodstock GA, US
Jason Kroh - Villa Rica GA, US
Michael Ellis - Alpharetta GA, US
Mark Allen - Atlanta GA, US
Wilton Pyle - Marietta GA, US

Assignee:

CardioMEMS, Inc. - Atlanta GA

International Classification:

G01R 27/04
G01R 35/00

US Classification:

324633, 324601

Abstract:

The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.

US Patent:

7839153, Nov 23, 2010

Filed:

May 15, 2009

Appl. No.:

12/466541

Inventors:

James Joy - Woodstock GA, US
Jason Kroh - Villa Rica GA, US
Michael Ellis - Alpharetta GA, US
Mark Allen - Atlanta GA, US
Wilton Pyle - Marietta GA, US

Assignee:

CardioMEMS, Inc. - Atlanta GA

International Classification:

G01R 27/04
G01R 35/00

US Classification:

324633, 324601

Abstract:

The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.

US Patent:

8237451, Aug 7, 2012

Filed:

Apr 1, 2011

Appl. No.:

13/078091

Inventors:

James Joy - Woodstock GA, US
Jason Kroh - Villa Rica GA, US
Michael Ellis - Alpharetta GA, US
Mark Allen - Atlanta GA, US
Wilton Pyle - Marietta GA, US

Assignee:

CardioMEMS, Inc. - Atlanta GA

International Classification:

G01R 27/32
G01R 35/00
G01R 23/12

US Classification:

324633, 324601, 324 7653

Abstract:

The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.

US Patent:

20050010125, Jan 13, 2005

Filed:

Nov 25, 2003

Appl. No.:

10/721476

Inventors:

James Joy - Alpharetta GA, US
Wilton Pyle - Marietta GA, US

International Classification:

A61B005/08

US Classification:

600529000

Abstract:

In one embodiment, a portable data acquisition unit includes a pressure sensor that is configured to measure pressure signals at a high-frequency rate, the signals pertaining to patient breathing, a microcontroller that receives pressure signals measured by the pressure sensor and determines clocks times associated with the pressure signals, and an interface that is configured to output sleep session data from the data acquisition unit to another device.

US Patent:

20070143479, Jun 21, 2007

Filed:

Dec 16, 2005

Appl. No.:

11/303641

Inventors:

Michael Putnam - Roswell GA, US
Joseph Paonessa - Roswell GA, US
James Joy - Woodstock GA, US
Philip Bleistine - Atlanta GA, US
Wilton Pyle - Marietta GA, US

International Classification:

G06F 15/173

US Classification:

709226000

Abstract:

Systems and methods for centralized custodial control are desribed. One described custodial control system includes a primary controller having a first network adapter, the primary controller configured to receive a custodial control parameter and generate and transmit a custodial control command, and a plurality of remote nodes each having a network adapter configured to receive the custodial control command and to implement a custodial control process based at least in part on the custodial control command. Various methods for administering a custodial control system are also described.

US Patent:

20090224837, Sep 10, 2009

Filed:

May 15, 2009

Appl. No.:

12/466595

Inventors:

James Joy - Woodstock GA, US
Jason Kroh - Villa Rica GA, US
Michael Ellis - Alpharetta GA, US
Mark Allen - Atlanta GA, US
Wilton Pyle - Marietta GA, US

Assignee:

CardioMEMS, Inc. - Atlanta GA

International Classification:

H03L 7/099

US Classification:

331 15

Abstract:

The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.