Patents by Inventor Maziar Tavakoli Dastjerdi

Maziar Tavakoli Dastjerdi 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).

  • Ultra-low-power pulse oximeter implemented with an energy-efficient photoreceptor
    Patent number: 8242429
    Abstract: An energy-efficient photoreceptor apparatus and a transimpedance amplifier apparatus having high energy-efficiency and low power consumption of which are achieved through multiple distributed gain amplification stages, adaptive loop gain control circuitry and unilateralization, thereby enabling fast and precise performance over a wide range of input-current levels. The high-energy efficiency, robust feedback stability and performance of the present invention can be utilized to achieve sub-milliwatt pulse oximeters and may be employed in other current-to-voltage amplification and conversion applications. The use of analog processing on the outputs of the photoreceptor apparatus also helps lower the overall power of pulse oximeters.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: August 14, 2012
    Inventors: Rahul Sarpeshkar, Maziar Tavakoli Dastjerdi
  • Ultra-low-power pulse oximeter implemented with an energy-efficient photoreceptor
    Publication number: 20090163784
    Abstract: An energy-efficient photoreceptor apparatus and a transimpedance amplifier apparatus having high energy-efficiency and low power consumption of which are achieved through multiple distributed gain amplification stages, adaptive loop gain control circuitry and unilateralization, thereby enabling fast and precise performance over a wide range of input-current levels. The high-energy efficiency, robust feedback stability and performance of the present invention can be utilized to achieve sub-milliwatt pulse oximeters and may be employed in other current-to-voltage amplification and conversion applications. The use of analog processing on the outputs of the photoreceptor apparatus also helps lower the overall power of pulse oximeters.
    Type: Application
    Filed: September 24, 2007
    Publication date: June 25, 2009
    Applicant: Competitve Technologies, Inc.
    Inventors: Rahul Sarpeshkar, Maziar Tavakoli Dastjerdi
  • Method to control the output common mode in a differential OPAMP with rail-to-rail input stage
    Patent number: 7532072
    Abstract: A differential amplifier with a rail-to-rail input stage includes a feedback circuit that maintains the output common mode voltage of the amplifier within a narrow range of an externally supplied value. To reduce harmonic distortions and to further stabilize the output common mode voltage of the amplifier, current is controllably drawn from a biasing circuit coupled to an intermediate stage of the amplifier. Optionally, to reduce harmonic distortions and to further stabilize the output common mode voltage of the amplifier, current is controllably supplied to the intermediate stage of the amplifier.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: May 12, 2009
    Assignee: Linear Technology Corporation
    Inventors: Maziar Tavakoli Dastjerdi, Kristiaan B. Lokere