Cory Voisine - Weare NH, Devon Fernandez - Manchester NH, Karl Scheller - Bow NH, Ravi Vig - Bow NH, Kirsten Doogue - Manchester NH,
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.
Methods And Apparatus For Magnetic Article Detection
Cory Voisine - Weare NH, Devon Fernandez - Manchester NH, Karl Scheller - Bow NH, Ravi Vig - Bow NH, Kirsten Doogue - Manchester NH,
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.
Methods And Apparatus For Passive Attachment Of Components For Integrated Circuits
Nirmal Sharma - Shrewsbury MA, Virgil Ararao - Rutland MA, Leonardo T. Magpantay - Paranaque City, Raymond W. Engel - Southbridge MA, William P. Taylor - Amherst NH, Kirsten Doogue - Manchester NH, Jay Gagnon - Holden MA,
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.
Methods And Apparatus For Magnetic Article Detection
Cory Voisine - Weare NH, Devon Fernandez - Manchester NH, Karl Scheller - Bow NH, Ravi Vig - Bow NH, Kirsten Doogue - Manchester NH,
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.
Methods And Apparatus For Passive Attachment Of Components For Integrated Circuits
Nirmal Sharma - Shrewsbury MA, Virgil Ararao - Rutland MA, Leonardo T. Magpantay - Paranaque City, Raymond W. Engel - Southbridge MA, William P. Taylor - Amherst NH, Kirsten Doogue - Manchester NH, Jay Gagnon - Holden MA,
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.