Patents by Inventor Yogendra Champaklal Shah

Yogendra Champaklal Shah 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: 6788668
    Abstract: In one embodiment, the present invention is a method for conserving power supplied to a linear feedback shift register (LFSR) long code (LC) generator, the method including steps of operating the LC generator during pre-assigned time slots; shutting off the LC generator during standby periods between the pre-assigned time slots; and priming starting states of the LC generator for synchronization with pre-assigned time slots following a standby period. This embodiment of the present invention enables power to be removed from the LFSR LC generator as well as the LFSR clock. Because the accuracy of the LFSR clock is usually derived from a system master transistor-controlled crystal oscillator (TCXO), and because the LFSR clock operates at a relatively high rate, the TCXO can also be powered down to conserve power. A low frequency, low power clock source can then be used instead of the higher powered clock source and TCXO to maintain operation of the mobile during the mobile sleep state.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: September 7, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Yogendra Champaklal Shah, Reza Aghazadeh-Alavi, Karim Nassiri Toussi, Sharad D. Sambhwani
  • Patent number: 6532222
    Abstract: Demodulator assignment logic is provided that confirms the presence and quality of a multipath before assigning a parallel demodulator to that multipath. Multipath presence and quality are confirmed when at least two power measurements of a multipath at least equal a selectable power threshold. Before permitting demodulated data from an assigned demodulator to be processed, demodulator assignment logic further reconfirms the presence and quality of a multipath via another more reliable power measurement that at least equals another selectable power threshold.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: March 11, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Kiran Meghashyam Rege, Krishna Balachandran, Kirk Kuokuang Chang, Zhendong Cao, Abdulkadir Dinc, Yogendra Champaklal Shah