Patents by Inventor Steve Chi

Steve Chi 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: 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: 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