Patents by Inventor Rajiv Shrikant Mantri

Rajiv Shrikant Mantri 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).

  • Mitigating the effects of signal overload in analog front-end circuits used in image sensing systems
    Patent number: 9185314
    Abstract: Output voltage of a charge-to-voltage converter used in an image sensing system is compared with one or more thresholds to determine if the output voltage exceeds predetermined threshold levels. If the output voltage exceeds one or more of the threshold levels, the input terminal of the charge-to-voltage converter is connected to a reference voltage to prevent the charge-to-voltage converter from saturating. Problems that could be caused due to overload of the voltage-to-charge converter are obviated. In an embodiment, the charge-to-voltage converter is implemented by an operational amplifier (OPAMP). A pair of comparators compares the output of the OPAMP with corresponding threshold voltages. The result of the comparison is used to generate a signal for connecting the input of the OPAMP to the reference voltage, thereby preventing saturation of the OPAMP.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 10, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajiv Shrikant Mantri, Nagesh Surendranath
  • MITIGATING THE EFFECTS OF SIGNAL OVERLOAD IN ANALOG FRONT-END CIRCUITS USED IN IMAGE SENSING SYSTEMS
    Publication number: 20130113461
    Abstract: Output voltage of a charge-to-voltage converter used in an image sensing system is compared with one or more thresholds to determine if the output voltage exceeds predetermined threshold levels. If the output voltage exceeds one or more of the threshold levels, the input terminal of the charge-to-voltage converter is connected to a reference voltage to prevent the charge-to-voltage converter from saturating. Problems that could be caused due to overload of the voltage-to-charge converter are obviated. In an embodiment, the charge-to-voltage converter is implemented by an operational amplifier (OPAMP). A pair of comparators compares the output of the OPAMP with corresponding threshold voltages. The result of the comparison is used to generate a signal for connecting the input of the OPAMP to the reference voltage, thereby preventing saturation of the OPAMP.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 9, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajiv Shrikant Mantri, Nagesh Surendranath
  • Generating a waveform having one signal level periodically and different signal levels in other durations
    Patent number: 6906563
    Abstract: Generating a waveform having one signal level periodically and different signal levels in other durations. Two input signals are received, one having a desired constant level and another having desired signal levels. The desired output waveform is generated by selecting one of the two input signals. As a result, the output waveform may be generated to have (transitions) with high frequency even if the signal levels between adjacent portions are substantially different. Such waveforms are useful to test CDS (correlated double sampling) samplers.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: June 14, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Rajiv Shrikant Mantri, Vineet Mishra, Vinod Paliakara, Asif Soyebali Surti