Patents by Inventor Prasad PONNADA

Prasad PONNADA 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).

  • Measurement circuitry for evaluating a resistance of a resistive gas sensor
    Patent number: 11199516
    Abstract: A measurement circuitry (MC) for evaluating a resistance of a resistive gas sensor (GS) comprises a first current path (P1), wherein a first logarithmic compression circuit (LC1) is arranged in the first current path (P1). A reference resistor (Rreference) and a second logarithmic compression circuit (LC2) is arranged in a second current path (P2) of the measurement circuitry (MC). A voltage generator (VG) provides a fixed voltage excitation for the resistive gas sensor (GS) and the reference resistor (Rreference). A first current (I1) received from the resistive gas sensor (GS) flows from the gas sensor (GS) via the first current path (P1) into the first logarithmic compression circuit (LC1). An evaluation circuit (EC) determines the resistance (Rs) of the resistive gas sensor (GS) in dependence on a first and second output signal (Ve1, Ve2) of the first and the second logarithmic compression circuit (LC1, LC2).
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: December 14, 2021
    Assignee: AMS INTERNATIONAL AG
    Inventors: Rohit Ranganathan, Sanjeev Praphulla Chandra Nyshadham, Krishna Kanth Avalur, Ravi Kumar Adusumalli, Prasad Ponnada
  • MEASUREMENT CIRCUITRY FOR EVALUATING A RESISTANCE OF A RESISTIVE GAS SENSOR
    Publication number: 20200033284
    Abstract: A measurement circuitry (MC) for evaluating a resistance of a resistive gas sensor (GS) comprises a first current path (P1), wherein a first logarithmic compression circuit (LC1) is arranged in the first current path (P1). A reference resistor (Rreference) and a second logarithmic compression circuit (LC2) is arranged in a second current path (P2) of the measurement circuitry (MC). A voltage generator (VG) provides a fixed voltage excitation for the resistive gas sensor (GS) and the reference resistor (Rreference). A first current (I1) received from the resistive gas sensor (GS) flows from the gas sensor (GS) via the first current path (P1) into the first logarithmic compression circuit (LC1). An evaluation circuit (EC) determines the resistance (Rs) of the resistive gas sensor (GS) in dependence on a first and second output signal (Ve1, Ve2) of the first and the second logarithmic compression circuit (LC1, LC2).
    Type: Application
    Filed: September 6, 2017
    Publication date: January 30, 2020
    Inventors: Rohit RANGANATHAN, Sanjeev Praphulla Chandra NYSHADHAM, Krishna Kanth AVALUR, Ravi Kumar ADUSUMALLI, Prasad PONNADA