Patents by Inventor Sanjay R. Vinekar

Sanjay R. Vinekar 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).

  • Patent number: 6031431
    Abstract: Methods and apparatus for implementing digital modulators and programmable interpolation circuits used in such modulators are described. In one embodiment a modulator is implemented using an programmable interpolator which performs both pulse shaping and interpolation functions followed by a mixer which, in turn, is followed by a band shifting interpolator which operates at a fixed interpolation rate. By using the programmable interpolator/Nyquist filter of the present invention, multiple input sampling frequencies can be supported with the need to make the band shifting interpolator programmable. In addition, pulse shaping and interpolation operations are combined leading to a more efficient overall modulator design.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: February 29, 2000
    Assignee: Hitachi America, Ltd.
    Inventor: Sanjay R. Vinekar
  • Patent number: 5581310
    Abstract: An architecture for a memory with a wide word, e.g. n-byte, width particularly suited for use as a high definition video frame store memory (80), and an accompanying organization for storing pixel data therein to facilitate efficient block and raster access therefrom. Specifically, the memory relies on storing n-byte wide words (n=(m.sub.1 .times.m.sub.2)) across m.sub.2 independent m.sub.1 -byte wide memory segments, with pre-defined positional offsets between respective m.sub.1 -byte words (203)("nibbles") stored in successive memory segments. All these segments are simultaneously accessed on a read or write basis. During a memory write operation, all the nibbles in an n-byte wide input word are appropriately shuffled to yield the proper inter-segment offsets prior to being written into the memory as a collective n-byte memory write word. During a read operation, all the nibbles read from memory in a collective n-byte memory read word are appropriately shuffled to yield an n-byte output word.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: December 3, 1996
    Assignee: Hitachi America, Ltd.
    Inventors: Sanjay R. Vinekar, Lawrence A. Pearlstein, Michael A. Plotnick, Joseph E. Augenbraun
  • Patent number: 4536794
    Abstract: A television receiver incorporates synchronizing circuitry which provides different synchronizing characteristics to accommodate different program sources. Illustratively, for receivers having vertical countdown circuits, normal broadcast signal reception causes the vertical synchronizing window to be narrow and the AFC circuits to operate normally. When the video signals originate from a nonbroadcast source, such as a video tape recorder or a video disc player, the synchronizing window is caused to be wide and the AFC circuit speed is increased. The appropriate receiver synchronizing characteristic is selected in response to the selected channel input.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: August 20, 1985
    Assignee: RCA Corporation
    Inventors: Ronald E. Fernsler, Sanjay R. Vinekar
  • Patent number: 4410907
    Abstract: A pulse generator for a television receiver produces keying pulses during the video signal back porch interval in order to energize burst gate and brightness control circuitry. The pulse generator is triggered by horizontal sync pulses under strong, noise-free video signal conditions. As the quality of the video signal and the horizontal sync pulses deteriorate due to noise or a weakening signal, the pulse generator is triggered by horizontal retrace pulse in order to provide keying pulses under all video signal conditions.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: October 18, 1983
    Assignee: RCA Corporation
    Inventors: Sanjay R. Vinekar, James Hettiger, Karl L. Friedline