Patents

Graphene Devices and Integration

  1. A. Polley, A. Venugopal, L. Colombo, R. R. Doering, “Low offset Graphene Hall sensor,” U. S. Patent: 10,001,529B2, grant date June 19, 2018. [Link]
  2. A. Polley, A. Venugopal, L. Colombo, R. R. Doering, “Low noise Graphene Hall sensors, systems and methods of making and using same,” U.S. Patent: 10,069,065, grant date September 04, 2018. [Link]
  3. A. Venugopal, A. Polley, L. Colombo, “Integration of Graphene and Boron Nitride hetero-structure device over semiconductor layer,” U. S. Patent: 10,304,967, grant date May 28, 2019. [Link]
  4. B. Haroun, A. Polley, S. Ramaswamy, “Amplification using ambipolar Hall effect in graphene,” US patent: 11415643 B2, grant date August 16, 2022. [Link]

Low-power & Smart Sensing Systems & PhotoPlethysmography

  1. A. Polley, A. Sharma, S. M. Ramaswamy, S. Narayanan, “Transmitter architecture for photoplethysmography systems,” U.S. Patent: 10,187,940, grant date January 22, 2019. [Link]
  2. A. Polley, A. Sharma, S. B. Lee, S. Narayanan, S. M. Ramaswamy, “Methods and Apparatus for Reducing Noise, Power and Settling Time in Multi-Modal Analog Multiplexed Data Acquisition Systems,” U.S. Patent: 9,667,289, grant date May 30, 2017. [Link]
  3. S. Narayanan, S. M. Ramaswamy, A. Polley, A. Sharma, ‘Exploiting Constructive Interference from Ambient Conditions,” U.S. Patent: 9,615,427B1, grant date April. 4, 2017. [Link]
  4. S. Narayanan, S. M. Ramaswamy, A. Polley, A. Sharma, ‘Sensor with low power model based feature extractor,” U.S. Patent: 9,397,685 B1, grant date July. 19, 2016. [Link]
  5. A. Sharma, S. M. Ramaswamy, S. Narayanan, A. Polley, S. B. Lee, W. Li, ‘Optical receiver chain for components of a photoplethysmograph signal,” U.S. Patent: 9,717,426, grant date August 1, 2017. [Link]
  6. S. Narayanan, S. M. Ramaswamy, A. Sharma, A. Polley, ‘Baseline compensation system,” US Patent: 9,742,420B2, grant date August 22, 2017. [Link]
  7. A. Sharma, S. B. Lee, S. M. Ramaswamy, S. Narayanan, A. Polley, ‘Calibrated SAR ADC having a reduced size,” U.S. Patent: 9,319,059 B1, grant date April. 4, 2016. [Link]
  8. A. Sharma, S. B. Lee, S. M. Ramaswamy, S. Narayanan, A. Polley, ‘Dual comparator-based error correction scheme for analog-to-digital converters,” U.S. Patent: 9,148,159 B1, grant date Sept. 17, 2015. [Link]

Magnetic Sensing & Current Sensing Systems

  1. A. Polley, R. M. Rosenquist, T. L. Sculley, “Removal of higher order magnetic interference in magnetic field based current sensors,” U. S. Patent: 10,082,527, grant date Sept. 25, 2018. [Link]
  2. A. Polley, S. M. Ramaswamy, T. L. Sculley, “Fluxgate-based Current Sensor,” U. S. Patent: 9,778,288B2, grant date October 03, 2017. [Link]
  3. A. Polley, R. M. Rosenquist, T. L. Sculley, “Closed-Loop Device Calibration Using a Wideband Signal,” U. S. Patent: 9,810,759B2, grant date November 07, 2017. [Link]
  4. G. Thiagarajan, A. Polley, T. L. Sculley, “Methods and apparatus for magnetic sensor with integrated calibration mechanism,” U. S. Patent: 9,778,327B2, grant date October 3, 2017. [Link]
  5. A. Polley, S. M. Ramaswamy, B. S. Haroun, R. Mukhopadhyay, “High bandwidth Hall sensor,” US patent: 10,197,638, grant date Feb 5, 2019. [Link]
  6. A. Polley, S. M. Ramaswamy, B. S. Haroun, R. Mukhopadhyay, “Transimpedance amplifier-based reduction of Hall sensor parasitic impedance,” US patent: 10,041,811B2, grant date August 07, 2018. [Link]
  7. A. Polley, S. M. Ramaswamy, B. S. Haroun, “Magnetic field-based current measurement,” US patent: 10598700, grant date March 24, 2020. [Link]
  8. A. Polley, S. M. Ramaswamy, B. S. Haroun, “Calibration of Hall device sensitivity using an auxiliary Hall device,” US patent: 10698066, grant date June 30, 2020. [Link]

Sensing Systems in magnetic Hard-Disk-Drive

  1. A. Polley, P. Pandey, B. Bloodworth, “Analog front end for proximity sensing of tunneling current,” U.S. Patent: 8896950 B1, grant date Nov. 25, 2014. [Link]
  2. A. Polley, “MOS resistor apparatus and methods,” U.S. Patent: 8710904, grant date April 29, 2014. [Link]
  3. A. Polley, R. Mukhopadhyay, R. Sharifi, M. A. Wolfe, “Proximity Sensing System,” U.S. Patent: 8 369 190 B2, grant date Feb. 5, 2013. [Link]