Patents by Inventor Kristann L. Moody
Kristann L. Moody has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11585868Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.Type: GrantFiled: August 17, 2020Date of Patent: February 21, 2023Assignee: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Publication number: 20200379061Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.Type: ApplicationFiled: August 17, 2020Publication date: December 3, 2020Applicant: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Patent number: 10782363Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.Type: GrantFiled: November 17, 2017Date of Patent: September 22, 2020Assignee: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Patent number: 10120017Abstract: In one aspect, an integrated circuit (IC) includes an output port enabling measurement of a performance characteristic of the IC at a first temperature. The performance characteristic of the IC is a minimum value at the first temperature with respect to any other temperature. The first temperature may be room temperature.Type: GrantFiled: July 15, 2016Date of Patent: November 6, 2018Assignee: Allegro MicroSystems, LLCInventors: Kristann L. Moody, Alejandro G. Milesi, Sam Tran
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Publication number: 20180088184Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.Type: ApplicationFiled: November 17, 2017Publication date: March 29, 2018Applicant: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Publication number: 20180017615Abstract: In one aspect, an integrated circuit (IC) includes an output port enabling measurement of a performance characteristic of the IC at a first temperature. The performance characteristic of the IC is a minimum value at the first temperature with respect to any other temperature. The first temperature may be room temperature.Type: ApplicationFiled: July 15, 2016Publication date: January 18, 2018Applicant: Allegro MicroSystems, LLCInventors: Kristann L. Moody, Alejandro G. Milesi, Sam Tran
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Patent number: 9851416Abstract: Systems, methods and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally one or more IDDQ and/or built-in-self test (BEST) circuits may be included.Type: GrantFiled: July 22, 2014Date of Patent: December 26, 2017Assignee: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Publication number: 20160025820Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.Type: ApplicationFiled: July 22, 2014Publication date: January 28, 2016Applicant: Allegro MicroSystems, LLCInventors: P. Karl Scheller, James E. Burgess, Steven E. Snyder, Kristann L. Moody, Devon Fernandez, Andrea Foletto
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Patent number: 6232768Abstract: A magnetic-field-to-voltage transducer includes a Hall element and a digitally gain-controlled Hall-voltage amplifier that produces an analog voltage Vsig having excursions of one polarity corresponding to the passing of magnetic articles. Vsig is applied to the input of a peak-referenced-threshold signal detector that generates a binary proximity-detector output voltage, Vout, having transitions of one direction upon approaches of gear teeth down to zero speed. A digitally gain-controlled amplifier is connected to the Hall element. A comparator circuit generates a binary signal Vbig (or Vtoobig) that changes from one to another binary level each time that Vsig exceeds a DC target voltage, VTG. The AGC circuit incrementally changes the transducer gain in the direction to bring the peaks in Vsig to just below the target value TTG. Reference voltages VP2 and VN2 are generated that are equal respectively to the most recent peak positive and negative going excursion in Vsig.Type: GrantFiled: May 7, 1997Date of Patent: May 15, 2001Assignee: Allegro Microsystems Inc.Inventors: Kristann L. Moody, Ravi Vig, P. Karl Scheller, Jay M. Towne, Teri L. Tu
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Patent number: 6091239Abstract: A detector for detecting passing magnetic articles including a magnetic-field-to-voltage transducer having an output at which an analog voltage Vsig is generated, with the Vsig voltage being commensurate to the strength of the ambient magnetic field and having at least one peak. An analog-to-digital converter coupled to the output of the transducer is operative to convert to a corresponding digital signal at least a portion of the Vsig voltage, which portion includes the peak and a circuit coupled to the analog-to-digital converter is operative to generate an output signal indicative of the occurrence of the times t.sub.xpk when the difference between Vsig and said peak of Vsig has exceeded a predetermined amount.Type: GrantFiled: August 31, 1999Date of Patent: July 18, 2000Assignee: Allegro MicroSystems, Inc.Inventors: Ravi Vig, Jay M. Towne, Kristann L. Moody, Teri L. Tu
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Patent number: 5729130Abstract: In a proximity-detector, a Hall transducer produces a signal Vsig. Two counters, P-counter and N-counter count pulses from a clock and produce count signals respectively to two DACs, PDAC and NDAC. The DACs output signals track and hold, respectively, the positive pulses and negative pulses in Vsig. These output signals are compared with Vsig to produce a proximity-detector binary output voltage Vout that becomes high when a tracking voltage V.sub.DAC-P produced by PDAC rises to each peak positive voltage V.sub.pk in Vsig, and that becomes low when a tracking voltage V.sub.DAC-P falls to each peak negative voltage in Vsig. The peak V.sub.DAC-P is held until Vsig drops by a fixed amount below V.sub.pk to produce an output pulse that resets the counter connected to PDAC at a time shortly following the actual peak in Vsig. Similarly, the peak V.sub.DAC-N is held until Vsig rises a fixed amount above V.sub.DAC-N to produce an output pulse that resets the counter connected to NDAC. The N-counter is reset at t.sub.Type: GrantFiled: January 17, 1996Date of Patent: March 17, 1998Inventors: Kristann L. Moody, Ravi Vig, Jay M. Towne, Teri L. Tu
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Patent number: 5694038Abstract: A magnetic-field-to-voltage transducer includes a Hall element and a digitally gain-controlled Hall-voltage amplifier that produces an analog voltage Vsig having excursions of one polarity corresponding to the passing of magnetic articles. Vsig is applied to the input of a signal-manipulating circuit that generates a proximity- detector binary output voltage, Vout, having transitions of one direction each time a predetermined point is reached in Vsig. A digitally gain-controlled gain amplifier is connected to the Hall element. A comparator circuit generates a binary signal Vbig (or V.sub.toobig) that changes from one to another binary level each time that Vsig exceeds a DC target voltage, V.sub.TG.Type: GrantFiled: January 17, 1996Date of Patent: December 2, 1997Assignee: Allegro Microsystems, Inc.Inventors: Kristann L. Moody, Ravi Vig, P. Karl Scheller, Jay M. Towne, Teri L. Tu
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Patent number: 5650719Abstract: A Hall transducer produces a signal Vsig. Threshold voltages V.sub.Pth and V.sub.Nth are generated at the beginning, t.sub.update, of each of a succession of update time intervals, of 64 pulses in Vsig, to be fixed percentages respectively of the peak to peak voltage in Vsig. A proximity-detector binary output voltage is high when Vsig exceeds threshold voltage V.sub.Pth and low when Vsig is below threshold voltage V.sub.Nth. Signals V.sub.Pold and V.sub.Nold, generated by first and second DACs, are equal to the first positive and negative peaks in Vsig after each time t.sub.update initiating the start of a successive interval. Signals V.sub.Pnew and V.sub.Nnew, simultaneously generated by third and fourth DACs, are equal to the greatest positive and negative peak voltages in Vsig during the interval ending at t.sub.update. Counters present their count to the first and second DACs that count pulses from a clock for tracking and holding +/- peaks in Vsig. After each time t.sub.Type: GrantFiled: January 17, 1996Date of Patent: July 22, 1997Assignee: Allegro Microsystems, Inc.Inventors: Kristann L. Moody, Ravi Vig, P. Karl Scheller, Jay M. Towne, Teri L. Tu