Patents by Inventor Ekram Bhuiyan

Ekram Bhuiyan 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: 11397460
    Abstract: For solid state drive (SSD) or other memory system formed of multiple memory dies, techniques are presented for operation in a standby mode with increased power savings. The memory dies are operable in a regular standby mode and in a low power standby mode. Based upon the amount of current each of the memory dies in the regular standby mode, when the device goes into standby the memory dies that draw higher amounts of current when in the regular standby mode are instead placed into the low power standby mode. The amount of current drawn by each of the memory die in the regular standby mode can be determined for each of the memory dies at die sort or as part of the memory test process, or can be determine by an assembled SSD itself.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: July 26, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Nian Niles Yang, Dmitry Vaysman, Ekram Bhuiyan
  • Publication number: 20200401207
    Abstract: For solid state drive (SSD) or other memory system formed of multiple memory dies, techniques are presented for operation in a standby mode with increased power savings. The memory dies are operable in a regular standby mode and in a low power standby mode. Based upon the amount of current each of the memory dies in the regular standby mode, when the device goes into standby the memory dies that draw higher amounts of current when in the regular standby mode are instead placed into the low power standby mode. The amount of current drawn by each of the memory die in the regular standby mode can be determined for each of the memory dies at die sort or as part of the memory test process, or can be determine by an assembled SSD itself.
    Type: Application
    Filed: June 20, 2019
    Publication date: December 24, 2020
    Applicant: Western Digital Technologies, Inc.
    Inventors: Nian Niles Yang, Dmitry Vaysman, Ekram Bhuiyan
  • Patent number: 10437472
    Abstract: A storage system and method for dynamic duty cycle correction are disclosed. In one embodiment, a controller of a storage system provides a clock signal to the memory, receives the clock signal back from the memory, monitors the duty cycle of the clock signal received back from the memory, and in response to the duty cycle of the clock signal received back from the memory not meeting a target value, adjusts the duty cycle of the clock signal provided to the memory so that the duty cycle of the clock signal received back from the memory better meets the target value. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: October 8, 2019
    Assignee: SanDisk Technologies LLC
    Inventors: Ekram Bhuiyan, Steve Chi
  • Publication number: 20170364276
    Abstract: A storage system and method for dynamic duty cycle correction are disclosed. In one embodiment, a controller of a storage system provides a clock signal to the memory, receives the clock signal back from the memory, monitors the duty cycle of the clock signal received back from the memory, and in response to the duty cycle of the clock signal received back from the memory not meeting a target value, adjusts the duty cycle of the clock signal provided to the memory so that the duty cycle of the clock signal received back from the memory better meets the target value. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.
    Type: Application
    Filed: June 21, 2016
    Publication date: December 21, 2017
    Applicant: SanDisk Technologies LLC
    Inventors: Ekram Bhuiyan, Steve Chi
  • Patent number: 9515648
    Abstract: A host power-on reset control circuit includes a comparator connected to receive both a divided version of a supply voltage and a reference voltage. The comparator generates and outputs a high digital state signal when the divided version of the supply voltage is at least as large as the reference voltage. The control circuit includes an output node connected to transmit a power-on reset control signal. The control circuit includes pulldown circuitry connected between the comparator output and the output node. The pulldown circuitry maintains the output node at a reset voltage level as the supply voltage rises to a host operational level, based on a signal present at the comparator output. The control circuit includes pullup circuitry connected between the supply voltage and the output node. The pullup circuitry maintains the output node at a non-reset voltage level after the supply voltage has risen to the host operational level.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: December 6, 2016
    Assignee: SanDisk Technologies LLC
    Inventors: Steve Chi, Ekram Bhuiyan
  • Publication number: 20160249422
    Abstract: A new type of light bulb is being invented, in which its power level (dimming) control circuit (FIG. 2) is integrated with the bulb. The desired power level can also be learned through the control logic (FIG. 3) integrated with bulb. The new invented bulb can be a compact fluorescent type 100 of bulb or a LED type of bulb 101. The invented bulb can be connected to an existing lamp holder (screw type) and people can change its power level (dimming) by only using the existing switch without any external circuit or device.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 25, 2016
    Inventors: Wen-Chau Wayne Hou, Gary Jun Liang Lin, Ekram Bhuiyan
  • Publication number: 20160249430
    Abstract: The invention is a new type of color bulb, in which its color control circuit is built inside or connected to the bulb itself. The desired bulb color can be controlled through a device inside the bulb. The new invented bulb can be a LED type of bulb or any electrical lighting device. The invented bulb can be connected into an existing bulb holder (screw type or any other kinds of connector) and people can change its color by only using the existing power switch without any external control circuit or device.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 25, 2016
    Inventors: Wen-Chau Wayne Hou, Gary JUN LIANG Lin, Ekram Bhuiyan
  • Publication number: 20110234268
    Abstract: A host power-on reset control circuit includes a comparator connected to receive both a divided version of a supply voltage and a reference voltage. The comparator generates and outputs a high digital state signal when the divided version of the supply voltage is at least as large as the reference voltage. The control circuit includes an output node connected to transmit a power-on reset control signal. The control circuit includes pulldown circuitry connected between the comparator output and the output node. The pulldown circuitry maintains the output node at a reset voltage level as the supply voltage rises to a host operational level, based on a signal present at the comparator output. The control circuit includes pullup circuitry connected between the supply voltage and the output node. The pullup circuitry maintains the output node at a non-reset voltage level after the supply voltage has risen to the host operational level.
    Type: Application
    Filed: March 26, 2010
    Publication date: September 29, 2011
    Applicant: SanDisk Corp.
    Inventors: Steve Chi, Ekram Bhuiyan
  • Publication number: 20110133710
    Abstract: Techniques are presented for reducing the DC voltage shift in a voltage regulator, particularly for high and ultra-high speed load switching operation. The regulator includes a power transistor, connected between an input supply voltage and an output node, and an error amplifier, having its output connected to control the gate of the output transistor, a first input connected to receive a reference voltage, and a second input connected to a feedback node. The regulator also includes a first resistance, connected between the feedback node and ground, and also a second resistance, a third resistance, and a first capacitance, where the feedback node is connected to the output node through a combination of the first capacitance in parallel with the second resistance and in series with the third resistance.
    Type: Application
    Filed: December 8, 2009
    Publication date: June 9, 2011
    Inventors: Deepak Pancholi, Ekram Bhuiyan, Steve Chi, Naidu Prasad, Bhavin Odedara