Kirsten A Doogue

US Patent:

7619406, Nov 17, 2009

Filed:

Mar 3, 2008

Appl. No.:

12/041055

Inventors:

Cory Voisine - Weare NH, US
Devon Fernandez - Manchester NH, US
Karl Scheller - Bow NH, US
Ravi Vig - Bow NH, US
Kirsten Doogue - Manchester NH, US

Assignee:

Allegro Microsystems, Inc. - Worcester MA

International Classification:

G01B 7/30
G01R 33/00

US Classification:

32420725, 324225

Abstract:

Apparatus and methods for detecting passing magnetic articles using a first, True Power On State (TPOS) detector during a first time interval and transitioning to a second, running mode detector after the first time interval, when the output of the second detector is accurate. A phase comparator is responsive to the output signal of the first and second detectors and provides a control signal indicative of a change in the phase relationship between the two output signals. An output switch controlled by the phase comparator provides, as the detector output signal, the first detector output signal during the first time interval and the second detector output signal thereafter. A threshold signal associated with the TPOS detector is at a fixed level during a first portion of the first time interval and is adjusted during a second portion of the first time interval in response to an automatic gain control circuit in order to reduce the phase error associated with transitioning from the TPOS detector to the running mode detector. Also described are apparatus and methods for updating a running mode threshold signal that is a percentage of the peak-to-peak magnetic field sensor signal, so that unnecessary update events are reduced.

US Patent:

7362094, Apr 22, 2008

Filed:

Jan 17, 2006

Appl. No.:

11/333522

Inventors:

Cory Voisine - Weare NH, US
Devon Fernandez - Manchester NH, US
Karl Scheller - Bow NH, US
Ravi Vig - Bow NH, US
Kirsten Doogue - Manchester NH, US

Assignee:

Allegro Microsystems, Inc. - Worcester MA

International Classification:

G01B 7/14
G01P 3/42

US Classification:

32420713, 32420726, 324173

Abstract:

Apparatus and methods for detecting passing magnetic articles using a first, True Power On State (TPOS) detector during a first time interval and transitioning to a second, running mode detector after the first time interval, when the output of the second detector is accurate. A phase comparator is responsive to the output signal of the first and second detectors and provides a control signal indicative of a change in the phase relationship between the two output signals. An output switch controlled by the phase comparator provides, as the detector output signal, the first detector output signal during the first time interval and the second detector output signal thereafter. A threshold signal associated with the TPOS detector is at a fixed level during a first portion of the first time interval and is adjusted during a second portion of the first time interval in response to an automatic gain control circuit in order to reduce the phase error associated with transitioning from the TPOS detector to the running mode detector. Also described are apparatus and methods for updating a running mode threshold signal that is a percentage of the peak-to-peak magnetic field sensor signal, so that unnecessary update events are reduced.

US Patent:

20080013298, Jan 17, 2008

Filed:

Jul 14, 2006

Appl. No.:

11/457626

Inventors:

Nirmal Sharma - Shrewsbury MA, US
Virgil Ararao - Rutland MA, US
Leonardo T. Magpantay - Paranaque City, PH
Raymond W. Engel - Southbridge MA, US
William P. Taylor - Amherst NH, US
Kirsten Doogue - Manchester NH, US
Jay Gagnon - Holden MA, US

International Classification:

H05K 5/02

US Classification:

361813

Abstract:

Methods and apparatus provide a sensor having an integrated component coupled to a leadframe. In one embodiment, a sensor includes external leads on an opposite side of a die from the integrated component. In another embodiment, a leadframe includes a slot to reduce eddy currents.

US Patent:

20080143326, Jun 19, 2008

Filed:

Mar 3, 2008

Appl. No.:

12/041052

Inventors:

Cory Voisine - Weare NH, US
Devon Fernandez - Manchester NH, US
Karl Scheller - Bow NH, US
Ravi Vig - Bow NH, US
Kirsten Doogue - Manchester NH, US

International Classification:

G01B 7/14

US Classification:

32420726

Abstract:

Apparatus and methods for detecting passing magnetic articles using a first, True Power On State (TPOS) detector during a first time interval and transitioning to a second, running mode detector after the first time interval, when the output of the second detector is accurate. A phase comparator is responsive to the output signal of the first and second detectors and provides a control signal indicative of a change in the phase relationship between the two output signals. An output switch controlled by the phase comparator provides, as the detector output signal, the first detector output signal during the first time interval and the second detector output signal thereafter. A threshold signal associated with the TPOS detector is at a fixed level during a first portion of the first time interval and is adjusted during a second portion of the first time interval in response to an automatic gain control circuit in order to reduce the phase error associated with transitioning from the TPOS detector to the running mode detector. Also described are apparatus and methods for updating a running mode threshold signal that is a percentage of the peak-to-peak magnetic field sensor signal, so that unnecessary update events are reduced.

US Patent:

20120086090, Apr 12, 2012

Filed:

Dec 14, 2011

Appl. No.:

13/325162

Inventors:

Nirmal Sharma - Shrewsbury MA, US
Virgil Ararao - Rutland MA, US
Leonardo T. Magpantay - Paranaque City, PH
Raymond W. Engel - Southbridge MA, US
William P. Taylor - Amherst NH, US
Kirsten Doogue - Manchester NH, US
Jay Gagnon - Holden MA, US

Assignee:

Allegro Microsystems, Inc. - Worcester MA

International Classification:

H01L 29/82

US Classification:

257421, 257E29323

Abstract:

Methods and apparatus provide a sensor including a component coupled to the leadframe such that the component is an integrated part of the IC package.

US Patent:

20200355525, Nov 12, 2020

Filed:

Jul 30, 2020

Appl. No.:

16/943357

Inventors:

- Manchester NH, US
Nirmal Sharma - Fremont CA, US
Virgil Ararao - McKinney TX, US
Leonardo Magpantay - Paranaque City, PH
Raymond W. Engel - Southbridge MA, US
Kirsten Doogue - Bedford NH, US
Jay Gagnon - Holden MA, US

Assignee:

Allegro MicroSystems, LLC - Manchester NH

International Classification:

G01D 11/24
H01L 23/495
G01R 33/07
G01R 33/09
H01L 43/04
H01L 43/06

Abstract:

Methods and apparatus for sensor including a die, a leadframe having opposed first and second surfaces, the leadframe supporting the die on the first surface, lead fingers to provide electrical connections to the leadframe and to the die; and a component electrically coupled to the leadframe and to a first one of the lead fingers such that the component is an integrated part of the IC package. The leadframe may have a cutout region in which the component is positioned.

US Patent:

20150285874, Oct 8, 2015

Filed:

Jun 17, 2015

Appl. No.:

14/741644

Inventors:

- Worcester MA, US
Virgil Ararao - Plano TX, US
Leonardo Magpantay - Paranaque City, PH
Raymond W. Engel - Southbridge MA, US
Nirmal Sharma - Fremon CA, US
Kirsten Doogue - Bedford NH, US
Jay Gagnon - Holden MA, US

Assignee:

ALLEGRO MICROSYSTEMS, LLC - Worcester MA

International Classification:

G01R 33/07
G01R 33/09
H01L 23/495
H01L 43/04
H01L 43/06

Abstract:

Methods and apparatus for a sensor having a die supporting a magnetic field sensor element, a leadframe having opposed first and second surfaces and leadfingers, a passive component coupled to the first and second ones of the leadfingers such that the component is an integrated part of an IC package, and a magnet adjacent to the second surface of leadframe to back bias the magnetic field sensor element.