Patents by Inventor Eric Bohannon

Eric Bohannon 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: 20200349332
    Abstract: A hybrid capacitive and optical fingerprint sensor system includes: capacitive sensor electrodes; an optical image sensor having a plurality of image sensor pixels; light conditioning elements, configured to condition light from a sensing region of the hybrid capacitive and optical fingerprint sensor for detection by the optical image sensor; and a processing system having one or more controllers, configured to operate the capacitive sensor electrodes in a low-power mode of operation for the hybrid capacitive and optical fingerprint sensor, and to operate the optical image sensor to acquire an image from the sensing region of the hybrid capacitive and optical fingerprint sensor.
    Type: Application
    Filed: July 17, 2020
    Publication date: November 5, 2020
    Applicant: FINGERPRINT CARDS AB
    Inventors: Jeffrey S. Lillie, Mark Pude, Eric Bohannon, Eric Moule, Erik Jonathon Thompson, Patrick Smith, Lynn Kern
  • Patent number: 10719683
    Abstract: A hybrid capacitive and optical fingerprint sensor system includes: capacitive sensor electrodes; an optical image sensor having a plurality of image sensor pixels; light conditioning elements, configured to condition light from a sensing region of the hybrid capacitive and optical fingerprint sensor for detection by the optical image sensor; and a processing system having one or more controllers, configured to operate the capacitive sensor electrodes in a low-power mode of operation for the hybrid capacitive and optical fingerprint sensor, and to operate the optical image sensor to acquire an image from the sensing region of the hybrid capacitive and optical fingerprint sensor.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: July 21, 2020
    Assignee: FINGERPRINT CARDS AB
    Inventors: Jeffrey S. Lillie, Mark Pude, Eric Bohannon, Eric Moule, Erik Jonathon Thompson, Patrick Smith, Lynn Kern
  • Publication number: 20200150811
    Abstract: An input device may include various sensor electrodes that define various sensor pixels. The input device may further include a processing system coupled to the sensor electrodes. The processing system may obtain a first resulting signal and a second resulting signal from the sensor electrodes. The processing system may determine, using the first resulting signal, an in-phase estimate of a phase delay at a sensor pixel among the sensor pixels. The processing system may determine, using the second resulting signal, a quadrature estimate of the phase delay at the sensor pixel. The processing system may determine, based at least in part on the in-phase estimate and the quadrature estimate, a phase baseline estimate of the sensor pixels.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Applicant: Synaptics Incorporated
    Inventors: Petr Shepelev, Eric Bohannon
  • Patent number: 10606386
    Abstract: An input device associated with a sensing region is provided. The input device includes: a sensor electrode configured to receive a resulting signal associated with the sensing region; an auxiliary component configured to generate an output based on a differential current; a mixer circuit coupled to the sensor electrode and including: a current conveyor configured to generate a replica of the resulting signal; and a switch array, in series with the replica and the differential current, and configured to generate the differential current by demodulating the replica of the resulting signal.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: March 31, 2020
    Assignee: Synaptics Incorporated
    Inventors: Kevin Fronczak, Eric Bohannon
  • Patent number: 10572048
    Abstract: An input device may include various sensor electrodes that define various sensor pixels. The input device may further include a processing system coupled to the sensor electrodes. The processing system may obtain a first resulting signal and a second resulting signal from the sensor electrodes. The processing system may determine, using the first resulting signal, an in-phase estimate of a phase delay at a sensor pixel among the sensor pixels. The processing system may determine, using the second resulting signal, a quadrature estimate of the phase delay at the sensor pixel. The processing system may determine, based at least in part on the in-phase estimate and the quadrature estimate, a phase baseline estimate of the sensor pixels.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: February 25, 2020
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Petr Shepelev, Eric Bohannon
  • Patent number: 10540042
    Abstract: An input device associated with a sensing region is disclosed. The input device includes: a first sensor electrode associated with the sensing region and configured to propagate a resulting signal; an first auxiliary component configured to generate an output using a scaled signal; and a first impedance ratio-based current conveyor coupled to the first sensor electrode and including: a staging circuit configured to generate an input signal using the resulting signal and a ratio of a first impedance to a second impedance; and a set of current mirrors configured to generate the scaled signal from the input signal.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: January 21, 2020
    Assignee: Synaptics Incorporated
    Inventor: Eric Bohannon
  • Patent number: 10530363
    Abstract: A method of capacitive sensing may include transmitting a first sensing signal along a first transmitter electrode among various transmitter electrodes of an input device. The method may further include obtaining, using various receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode. The method may further include obtaining a second resulting signal from a second transmitter electrode among the transmitter electrodes. The method may further include determining, using the second resulting signal, interference along the second transmitter electrode. The method may further include adjusting, using the interference along the second transmitter electrode, the first resulting signal to produce an adjusted resulting signal. The method may further include determining, using the adjusted resulting signal, positional information regarding a location of an input object in a sensing region of the input device.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: January 7, 2020
    Assignee: Synaptics Incorporated
    Inventors: Eric Bohannon, Steve Lo
  • Patent number: 10530296
    Abstract: An oscillator circuit is disclosed. The oscillator circuit includes: oscillator transistors including gates; adjustment transistors coupled to the gates; a differential output coupled to the oscillator transistors; a switch configured to set an oscillation frequency of the differential output by driving: a first current including a first portion of a main current through at least one of the oscillator transistors; and a second current including a second portion of the main current through at least one of the adjustment transistors; a first set of auxiliary current sources configured to adjust a temperature coefficient of the oscillator circuit by driving a first set of auxiliary currents through the oscillator transistors; and a second set of auxiliary current sources configured to maintain the oscillation frequency of the differential output by driving, in response to driving the first set of auxiliary currents, a second set of auxiliary currents though the adjustment transistors.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: January 7, 2020
    Assignee: Synaptics Incorporated
    Inventors: Andrew Jabrucki, Eric Bohannon, Kevin Fronczak
  • Patent number: 10416695
    Abstract: A voltage regulation system includes an error amplifier configured to generate an error amplifier output based on a reference voltage, input voltage, first feedback voltage, and second feedback voltage. The feedback voltages are based on a first output voltage at the system's output node. The system further includes a capacitor configured to provide the first feedback voltage to the error amplifier. The system further includes a voltage-controlled current source configured to generate a current based on the first output voltage. The second feedback voltage is based on the current. The system further includes a transistor configured to provide a second output voltage at the output node based on the error amplifier output. The transistor is connected to the output node and the capacitor. Such a voltage regulation system may allow a high power supply rejection response over a wide range of frequencies and loads while maintaining stability and phase margin.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: September 17, 2019
    Assignee: SYNAPTICS INCORPORATED
    Inventor: Eric Bohannon
  • Patent number: 10394386
    Abstract: An input device associated with a sensing region is disclosed. The input device includes: a sensor electrode configured to receive a resulting signal associated with the sensing region; a current conveyor configured to generate a first replica of the resulting signal; a mixer circuit configured to generate a differential current by demodulating the first replica of the resulting signal; an interference detection circuit (IDC) configured to: generate a second replica of the resulting signal based on the first replica; determine the second replica includes an interference signal based on a reference current; and generate an interference alert signal in response to determining the second replica includes the interference signal; and an auxiliary component configured to generate an output based on the differential current and the interference alert signal.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: August 27, 2019
    Assignee: Synaptics Incorporated
    Inventors: Kevin Fronczak, Eric Bohannon
  • Publication number: 20190238091
    Abstract: An oscillator circuit is disclosed. The oscillator circuit includes: oscillator transistors including gates; adjustment transistors coupled to the gates; a differential output coupled to the oscillator transistors; a switch configured to set an oscillation frequency of the differential output by driving: a first current including a first portion of a main current through at least one of the oscillator transistors; and a second current including a second portion of the main current through at least one of the adjustment transistors; a first set of auxiliary current sources configured to adjust a temperature coefficient of the oscillator circuit by driving a first set of auxiliary currents through the oscillator transistors; and a second set of auxiliary current sources configured to maintain the oscillation frequency of the differential output by driving, in response to driving the first set of auxiliary currents, a second set of auxiliary currents though the adjustment transistors.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 1, 2019
    Inventors: Andrew Jabrucki, Eric Bohannon, Kevin Fronczak
  • Patent number: 10360428
    Abstract: An input device for capacitive sensing includes: a plurality of transmitter electrodes and a plurality of receiver electrodes. The input device is configured to: operate in a first mode by driving sensing signals onto each of the transmitter electrodes and receiving separate detected signals corresponding to each of the plurality of receiver electrodes; and operate in a second mode by driving a common sensing signal onto a plurality of the transmitter electrodes and receiving a common detected signal corresponding to at least one receiver electrode selected from the plurality of receiver electrodes.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: July 23, 2019
    Assignee: Synaptics Incorporated
    Inventors: Eric Bohannon, Mark Pude, Jeffrey Lillie
  • Publication number: 20190196629
    Abstract: An input device may include various sensor electrodes that define various sensor pixels. The input device may further include a processing system coupled to the sensor electrodes. The processing system may obtain a first resulting signal and a second resulting signal from the sensor electrodes. The processing system may determine, using the first resulting signal, an in-phase estimate of a phase delay at a sensor pixel among the sensor pixels. The processing system may determine, using the second resulting signal, a quadrature estimate of the phase delay at the sensor pixel. The processing system may determine, based at least in part on the in-phase estimate and the quadrature estimate, a phase baseline estimate of the sensor pixels.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 27, 2019
    Inventors: Petr Shepelev, Eric Bohannon
  • Publication number: 20190107917
    Abstract: An input device associated with a sensing region is disclosed. The input device includes: a first sensor electrode associated with the sensing region and configured to propagate a resulting signal; an first auxiliary component configured to generate an output using a scaled signal; and a first impedance ratio-based current conveyor coupled to the first sensor electrode and including: a staging circuit configured to generate an input signal using the resulting signal and a ratio of a first impedance to a second impedance; and a set of current mirrors configured to generate the scaled signal from the input signal.
    Type: Application
    Filed: October 10, 2017
    Publication date: April 11, 2019
    Applicant: Synaptics Incorporated
    Inventor: Eric Bohannon
  • Publication number: 20190064974
    Abstract: An input device associated with a sensing region is provided. The input device includes: a sensor electrode configured to receive a resulting signal associated with the sensing region; an auxiliary component configured to generate an output based on a differential current; a mixer circuit coupled to the sensor electrode and including: a current conveyor configured to generate a replica of the resulting signal; and a switch array, in series with the replica and the differential current, and configured to generate the differential current by demodulating the replica of the resulting signal.
    Type: Application
    Filed: August 24, 2017
    Publication date: February 28, 2019
    Inventors: Kevin Fronczak, Eric Bohannon
  • Publication number: 20190068189
    Abstract: A method of capacitive sensing may include transmitting a first sensing signal along a first transmitter electrode among various transmitter electrodes of an input device. The method may further include obtaining, using various receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode. The method may further include obtaining a second resulting signal from a second transmitter electrode among the transmitter electrodes. The method may further include determining, using the second resulting signal, interference along the second transmitter electrode. The method may further include adjusting, using the interference along the second transmitter electrode, the first resulting signal to produce an adjusted resulting signal. The method may further include determining, using the adjusted resulting signal, positional information regarding a location of an input object in a sensing region of the input device.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 28, 2019
    Inventors: Eric Bohannon, Steve Lo
  • Publication number: 20190018998
    Abstract: A hybrid capacitive and optical fingerprint sensor system includes: capacitive sensor electrodes; an optical image sensor having a plurality of image sensor pixels; light conditioning elements, configured to condition light from a sensing region of the hybrid capacitive and optical fingerprint sensor for detection by the optical image sensor; and a processing system having one or more controllers, configured to operate the capacitive sensor electrodes in a low-power mode of operation for the hybrid capacitive and optical fingerprint sensor, and to operate the optical image sensor to acquire an image from the sensing region of the hybrid capacitive and optical fingerprint sensor.
    Type: Application
    Filed: September 6, 2018
    Publication date: January 17, 2019
    Inventors: Jeffrey S. Lillie, Mark Pude, Eric Bohannon, Eric Moule, Erik Jonathon Thompson, Patrick Smith, Lynn Kern
  • Publication number: 20190005290
    Abstract: An input device for capacitive sensing includes: a plurality of transmitter electrodes and a plurality of receiver electrodes. The input device is configured to: operate in a first mode by driving sensing signals onto each of the transmitter electrodes and receiving separate detected signals corresponding to each of the plurality of receiver electrodes; and operate in a second mode by driving a common sensing signal onto a plurality of the transmitter electrodes and receiving a common detected signal corresponding to at least one receiver electrode selected from the plurality of receiver electrodes.
    Type: Application
    Filed: June 28, 2017
    Publication date: January 3, 2019
    Inventors: Eric Bohannon, Mark Pude, Jeffrey Lillie
  • Publication number: 20180348954
    Abstract: In a method of capacitive sensing, continuous time demodulation of a resulting signal received from a capacitive sensor is performed. The resulting signal measured is as a result of a modulated signal driven for capacitive sensing. An input object interaction is detected using the resulting signal. Responsive to detection of the input object interaction, a mixing signal is phase-shifted.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 6, 2018
    Inventors: Eric Bohannon, Nooreldin Amer, Giri Mehta, Marshall Bell
  • Patent number: 10102411
    Abstract: A hybrid capacitive and optical fingerprint sensor system includes: capacitive sensor electrodes; an optical image sensor having a plurality of image sensor pixels; light conditioning elements, configured to condition light from a sensing region of the hybrid capacitive and optical fingerprint sensor for detection by the optical image sensor; and a processing system having one or more controllers, configured to operate the capacitive sensor electrodes in a low-power mode of operation for the hybrid capacitive and optical fingerprint sensor, and to operate the optical image sensor to acquire an image from the sensing region of the hybrid capacitive and optical fingerprint sensor.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: October 16, 2018
    Assignee: Synaptics Incorporated
    Inventors: Jeffrey S. Lillie, Mark Pude, Eric Bohannon, Eric Moule, Erik Jonathon Thompson, Patrick Smith, Lynn Kern