Patents by Inventor Jaswinder Jandu

Jaswinder Jandu 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).

  • Publication number: 20140016838
    Abstract: An apparatus for reducing noise in fingerprint sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An analog front end is coupled to the fingerprint sensing area and is configured to generate an analog response signal. An analog-to-digital converter (ADC) samples the analog response signal and converts the sample to a digital value, which may be received by a digital device such as a processor or CPU. To reduce the amount of the noise that is present in the analog response signal and therefore reflected in the digital value, the digital device may be shut down while the ADC is sampling the analog response signal.
    Type: Application
    Filed: August 13, 2013
    Publication date: January 16, 2014
    Applicant: Validity Sensors, Inc.
    Inventors: Gregory Lewis DEAN, Richard Alexander ERHART, Jaswinder JANDU, Erik Jonathon THOMPSON
  • Patent number: 8593160
    Abstract: An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: November 26, 2013
    Assignee: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Publication number: 20130258086
    Abstract: A biometric image sensor system and method is disclosed which may comprise a first light source having a first wavelength ?1, a second light source having a second wavelength ?2, a photodetector configured and positioned to receive light of the first wavelength ?1 and light of the second wavelength ?2 reflecting from a biometric object being imaged and to produce a first output indicative of the amount of reflectance of the light of the first wavelength ?1 and a second output indicative of the amount of reflectance of the light of the second wavelength ?2, and a computing device configured to compare the difference between the first output and the second output with an authenticity threshold.
    Type: Application
    Filed: February 8, 2013
    Publication date: October 3, 2013
    Applicant: Validity Sensors, Inc.
    Inventors: Richard Alexander ERHART, Erik Jonathon THOMPSON, Jaswinder JANDU, Pamela PERCY
  • Patent number: 8520913
    Abstract: An apparatus for reducing noise in fingerprint sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An analog front end is coupled to the fingerprint sensing area and is configured to generate an analog response signal. An analog-to-digital converter (ADC) samples the analog response signal and converts the sample to a digital value, which may be received by a digital device such as a processor or CPU. To reduce the amount of the noise that is present in the analog response signal and therefore reflected in the digital value, the digital device may be shut down while the ADC is sampling the analog response signal.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: August 27, 2013
    Assignee: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Publication number: 20130021044
    Abstract: An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 24, 2013
    Applicant: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Patent number: 8278946
    Abstract: An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: October 2, 2012
    Assignee: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Publication number: 20120148122
    Abstract: An apparatus for reducing noise in fingerprint sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An analog front end is coupled to the fingerprint sensing area and is configured to generate an analog response signal. An analog-to-digital converter (ADC) samples the analog response signal and converts the sample to a digital value, which may be received by a digital device such as a processor or CPU. To reduce the amount of the noise that is present in the analog response signal and therefore reflected in the digital value, the digital device may be shut down while the ADC is sampling the analog response signal.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 14, 2012
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathan Thompson
  • Patent number: 8116540
    Abstract: An apparatus for reducing noise in fingerprint sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An analog front end is coupled to the fingerprint sensing area and is configured to generate an analog response signal. An analog-to-digital converter (ADC) samples the analog response signal and converts the sample to a digital value, which may be received by a digital device such as a processor or CPU. To reduce the amount of the noise that is present in the analog response signal and therefore reflected in the digital value, the digital device may be shut down while the ADC is sampling the analog response signal.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: February 14, 2012
    Assignee: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathan Thompson
  • Publication number: 20110298711
    Abstract: An apparatus is disclosed in a first embodiment of the invention as including a non-conductive substrate providing a first surface onto which a user can apply a fingerprint. A fingerprint sensing circuit is applied to a second surface of the non-conductive substrate opposite the first surface. The fingerprint sensing circuit is capable of sensing a fingerprint through the non-conductive substrate. A navigation device is positioned adjacent to (e.g., below) the non-conductive substrate and is capable of being manipulated by the user through the non-conductive substrate.
    Type: Application
    Filed: June 2, 2010
    Publication date: December 8, 2011
    Applicant: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Anthony Russo, Erik Thompson
  • Patent number: 8005276
    Abstract: A fingerprint sensing circuit for reducing noise and parasitic capacitive coupling is disclosed in one embodiment of the invention as including a plurality of transmitting elements to sequentially emit a probing signal. A digital ground is provided to ground digital components in the fingerprint sensing circuit. A quiet ground, separate from and quieter than the digital ground, is provided to ground transmitting elements that are not transmitting the probing signal. Similarly, control logic is provided to connect, to the quiet ground, transmitting elements that are not transmitting the probing signal, while disconnecting, from the quiet ground, transmitting elements that are emitting the probing signal. The quiet ground helps to reduce the adverse effects of parasitic capacitive coupling and noise on the inactive transmitting elements.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: August 23, 2011
    Assignee: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Patent number: 7953258
    Abstract: A fingerprint sensor with programmable sensing patterns is disclosed in one embodiment of the invention as including a fingerprint sensing circuit having multiple I/O interconnects. The I/O interconnects are configured to sequentially drive a plurality of fingerprint sensing elements. A memory device may be operably coupled to the fingerprint sensing circuit. A programmable data structure, such as a table, file, character string, numeric value, array, or the like may be stored in the memory device to designate a pattern for driving the fingerprint sensing elements. The fingerprint sensing circuit is configured to drive the fingerprint sensing elements according to the designated pattern. In selected embodiments, the fingerprint sensing elements may include transmitting elements, receiving elements, or a combination thereof.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: May 31, 2011
    Assignee: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Publication number: 20100176892
    Abstract: A low power oscillator is disclosed in one embodiment of the invention as including a Schmitt trigger having an input, an output, and an input stage coupled to the input. The input stage may include multiple transistors connected in series between a power source and ground. A switch, controlled by the output of the Schmitt trigger, may be connected in series with the multiple transistors. The switch is configured to interrupt shoot-through current passing through the transistors when the transistors are turned on at the same time. In certain embodiments, the switch may reduce the shoot-through current by substantially half.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 15, 2010
    Applicant: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhard
  • Publication number: 20100180136
    Abstract: An apparatus for reducing power consumption in fingerprint-sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An integrated circuit communicates with the fingerprint sensing area and is configured to detect finger activity over the fingerprint sensing area. The integrated circuit includes a primary logic portion configured to assume control of the integrated circuit when finger activity is detected over the fingerprint sensing area. The integrated circuit also includes a secondary logic portion configured to assume control of the integrated circuit and shut off power to the primary logic portion when finger activity is not detected over the fingerprint sensing area.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 15, 2010
    Applicant: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Publication number: 20100176823
    Abstract: An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 15, 2010
    Applicant: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Publication number: 20090252384
    Abstract: A fingerprint sensor with programmable sensing patterns is disclosed in one embodiment of the invention as including a fingerprint sensing circuit having multiple I/O interconnects. The I/O interconnects are configured to sequentially drive a plurality of fingerprint sensing elements. A memory device may be operably coupled to the fingerprint sensing circuit. A programmable data structure, such as a table, file, character string, numeric value, array, or the like may be stored in the memory device to designate a pattern for driving the fingerprint sensing elements. The fingerprint sensing circuit is configured to drive the fingerprint sensing elements according to the designated pattern. In selected embodiments, the fingerprint sensing elements may include transmitting elements, receiving elements, or a combination thereof.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Publication number: 20090252385
    Abstract: An apparatus for reducing noise in fingerprint sensing circuits is disclosed in one embodiment of the invention as including a fingerprint sensing area onto which a user can apply a fingerprint. An analog front end is coupled to the fingerprint sensing area and is configured to generate an analog response signal. An analog-to-digital converter (ADC) samples the analog response signal and converts the sample to a digital value, which may be received by a digital device such as a processor or CPU. To reduce the amount of the noise that is present in the analog response signal and therefore reflected in the digital value, the digital device may be shut down while the ADC is sampling the analog response signal.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Publication number: 20090252386
    Abstract: A fingerprint sensing circuit for reducing noise and parasitic capacitive coupling is disclosed in one embodiment of the invention as including a plurality of transmitting elements to sequentially emit a probing signal. A digital ground is provided to ground digital components in the fingerprint sensing circuit. A quiet ground, separate from and quieter than the digital ground, is provided to ground transmitting elements that are not transmitting the probing signal. Similarly, control logic is provided to connect, to the quiet ground, transmitting elements that are not transmitting the probing signal, while disconnecting, from the quiet ground, transmitting elements that are emitting the probing signal. The quiet ground helps to reduce the adverse effects of parasitic capacitive coupling and noise on the inactive transmitting elements.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: Validity Sensors, Inc.
    Inventors: Gregory Lewis Dean, Richard Alexander Erhart, Jaswinder Jandu, Erik Jonathon Thompson
  • Patent number: 7460697
    Abstract: Image sensing apparatus includes an image pickup plate disposed generally orthogonally with respect to an expected direction of movement of an object, such as a finger, multiple image drive plates in spaced relation to the image pickup plate to define sensor gaps between respective image drive plates and the image pickup plate, and a reference plate disposed substantially parallel to the image pickup plate. The reference plate is spaced from the image pickup plate to permit common mode noise and coupling to be cancelled and is spaced from the image drive plates to permit a differential image signal to develop between the image pickup plate and the reference plate. A differential amplifier coupled to the image pickup plate and the reference plate provides noise cancellation. The apparatus may further include a comb plate spaced from the reference plate and coupled to a reference potential, such as ground.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: December 2, 2008
    Assignee: Validity Sensors, Inc.
    Inventors: Richard A. Erhart, Darioush Keyvani, Fred G. Benkley, III, Jaswinder Jandu
  • Publication number: 20070031011
    Abstract: Image sensing apparatus includes an image pickup plate disposed generally orthogonally with respect to an expected direction of movement of an object, such as a finger, multiple image drive plates in spaced relation to the image pickup plate to define sensor gaps between respective image drive plates and the image pickup plate, and a reference plate disposed substantially parallel to the image pickup plate. The reference plate is spaced from the image pickup plate to permit common mode noise and coupling to be cancelled and is spaced from the image drive plates to permit a differential image signal to develop between the image pickup plate and the reference plate. A differential amplifier coupled to the image pickup plate and the reference plate provides noise cancellation. The apparatus may further include a comb plate spaced from the reference plate and coupled to a reference potential, such as ground.
    Type: Application
    Filed: July 19, 2005
    Publication date: February 8, 2007
    Applicants: Validity Sensors, Inc., National Semiconductor Corporation
    Inventors: Richard Erhart, Darioush Keyvani, Fred Benkley, Jaswinder Jandu
  • Patent number: 5917363
    Abstract: A method (701-717) and apparatus for providing a driver system requiring a reduced number of amplifier circuits. Load driving circuitry (205) is configured to include a single loop amplifier (401) for sequentially receiving multiplexed signals representative of the parameter values and effecting the output of such signals to corresponding loads. Sample-and-hold circuitry is coupled between the output of the loop amplifier (401) and load circuitry within the driver circuits (409, 429, 435) in an arrangement such that only one loop amplifier (401) is required in a multiplexed multi-input system.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: June 29, 1999
    Assignee: Motorola, Inc.
    Inventors: Jaswinder Jandu, John Pigott