Patents by Inventor Khin Htoo

Khin Htoo 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: 10726910
    Abstract: Disclosed is a device including a sinking circuit to sink current from an output node and a driver circuit coupled to the sinking circuit. The driver circuit includes complementary differential pairs to receive a voltage at the output node and generate a control signal according to the received voltage. The sinking circuit is configured to change the current from the output node according to the control signal.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: July 28, 2020
    Assignee: SanDisk Technologies LLC
    Inventors: Albert Chang, Khin Htoo, Matt Chen
  • Patent number: 10529386
    Abstract: Disclosed is a device including a distributed controller and a common controller. The distributed controller includes a first circuit to generate an output voltage according to a control signal. The common controller includes a common feedback loop coupled to the distributed controller. The common feedback loop includes an amplifier circuit to generate the control signal, and a second circuit coupled to the amplifier circuit. The second circuit replicates the first circuit and stabilizes the control signal.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: January 7, 2020
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Albert Chang, Sung-En Wang, Khin Htoo, Supraja Sundaresan, Matt Chen
  • Patent number: 10424358
    Abstract: Disclosed is a device including a selected distributed driver, a first feedback control circuit, and a second feedback control circuit. The first feedback control circuit is coupled to the selected distributed driver. The first feedback control circuit is configured to maintain an output of the selected distributed driver within a first predetermined range. The second feedback control circuit is selectively coupled to the selected distributed driver and is configured to maintain the output of the selected distributed driver to be within a second predetermined range. The second predetermined range is within the first predetermined range.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: September 24, 2019
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Supraja Sundaresan, Sung-en Wang, Khin Htoo, Primit Modi
  • Publication number: 20180358057
    Abstract: Disclosed is a device including a distributed controller and a common controller. The distributed controller includes a first circuit to generate an output voltage according to a control signal. The common controller includes a common feedback loop coupled to the distributed controller. The common feedback loop includes an amplifier circuit to generate the control signal, and a second circuit coupled to the amplifier circuit. The second circuit replicates the first circuit and stabilizes the control signal.
    Type: Application
    Filed: January 25, 2018
    Publication date: December 13, 2018
    Inventors: Albert CHANG, Sung-En WANG, Khin HTOO, Supraja SUNDARESAN, Matt CHEN
  • Publication number: 20180358069
    Abstract: Disclosed is a device including a selected distributed driver, a first feedback control circuit, and a second feedback control circuit. The first feedback control circuit is coupled to the selected distributed driver. The first feedback control circuit is configured to maintain an output of the selected distributed driver within a first predetermined range. The second feedback control circuit is selectively coupled to the selected distributed driver and is configured to maintain the output of the selected distributed driver to be within a second predetermined range. The second predetermined range is within the first predetermined range.
    Type: Application
    Filed: January 12, 2018
    Publication date: December 13, 2018
    Inventors: Supraja SUNDARESAN, Sung-en WANG, Khin HTOO, Primit MODI
  • Publication number: 20180358087
    Abstract: Disclosed is a device including a sinking circuit to sink current from an output node and a driver circuit coupled to the sinking circuit. The driver circuit includes complimentary differential pairs to receive a voltage at the output node and generate a control signal according to the received voltage. The sinking circuit is configured to change the current from the output node according to the control signal.
    Type: Application
    Filed: January 18, 2018
    Publication date: December 13, 2018
    Inventors: Albert CHANG, Khin HTOO, Matt CHEN
  • Patent number: 8537593
    Abstract: A circuit for supplying a high voltage to load is described. An example of such a circuit could be used in the peripheral circuitry of a non-volatile memory device for supplying a program voltage from a charge pump to a selected word line. The circuit includes a charge pump that generates the high voltage and decoding circuitry that is connected to receive this high voltage and selectively apply it to a load. The decoding circuitry receives the high voltage through a switch, where the switch is of a variable resistance that progressively passes the high voltage in response to a control signal. In a particular example, the switch includes a transistor connected between the charge pump and the decoding circuitry, where the control gate of the transistor is connected to the output of a second charge pump that is connected to receive the high voltage and a settable clock signal as its inputs.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: September 17, 2013
    Assignee: SanDisk Technologies Inc.
    Inventors: Jonathan Hoang Huynh, Feng Pan, Khin Htoo
  • Patent number: 8514628
    Abstract: A charge pump system uses a dynamic switching approach, where the pump connections are independent of the load for each output. One large pump is designed to be shared between all of the outputs for use during the ramp up during recovery, with each output level also have one designated pump to maintain its level when under regulation. Each small pump is designed with capability that can maintain its output at its regulation level. Each of these pumps can be tailored to the corresponding output level, such as the number of stages being higher in the pump to supply the higher output level. The large pump unit is constructed to be ample to provide sufficient drive to be able to assist in the ramp up phase for all of the outputs and has as many switches needed to connect the pump with all the needed outputs.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: August 20, 2013
    Assignee: SanDisk Technologies Inc.
    Inventors: Qui Vi Nguyen, Khin Htoo, Jonathan Huynh
  • Publication number: 20130077411
    Abstract: A charge pump system uses a dynamic switching approach, where the pump connections are independent of the load for each output. One large pump is designed to be shared between all of the outputs for use during the ramp up during recovery, with each output level also have one designated pump to maintain its level when under regulation. Each small pump is designed with capability that can maintain its output at its regulation level. Each of these pumps can be tailored to the corresponding output level, such as the number of stages being higher in the pump to supply the higher output level. The large pump unit is constructed to be ample to provide sufficient drive to be able to assist in the ramp up phase for all of the outputs and has as many switches needed to connect the pump with all the needed outputs.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 28, 2013
    Inventors: Qui Vi Nguyen, Khin Htoo, Jonathan Huynh
  • Patent number: 8339183
    Abstract: A charge pump circuit for generating an output voltage is described. Charge pump circuits typically have two branches. As the clocks supplying the branches of a charge pump circuit alternate, the output of each branch will alternately provide an output voltage, which are then combined to form the pump output. The techniques described here allow charge to be transferred between the two branches, so that as the capacitor of one branch discharges, it is used to charge up the capacitor in the other branch. An exemplary embodiment using a voltage doubler-type of circuit, with the charge transfer between the branches accomplished using a switch controller by a boosted version of the clock signal, which is provided by a one-sided voltage doubler.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: December 25, 2012
    Assignee: SanDisk Technologies Inc.
    Inventors: Khin Htoo, Feng Pan, Byungki Woo, Trung Pham, Yuxin Wang
  • Publication number: 20120275225
    Abstract: A circuit for supplying a high voltage to load is described. An example of such a circuit could be used in the peripheral circuitry of a non-volatile memory device for supplying a program voltage from a charge pump to a selected word line. The circuit includes a charge pump that generates the high voltage and decoding circuitry that is connected to receive this high voltage and selectively apply it to a load. The decoding circuitry receives the high voltage through a switch, where the switch is of a variable resistance that progressively passes the high voltage in response to a control signal. In a particular example, the switch includes a transistor connected between the charge pump and the decoding circuitry, where the control gate of the transistor is connected to the output of a second charge pump that is connected to receive the high voltage and a settable clock signal as its inputs.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Inventors: Jonathan Hoang Huynh, Feng Pan, Khin Htoo
  • Patent number: 8228739
    Abstract: A circuit and corresponding method for providing a reference voltage are presented. The circuit includes a current source having a magnitude with positive temperature correlation connected to a node, and a diode element connected between the node and ground, where the reference voltage is provided from the node. The circuit also includes a variable resistance connected to receive an input indicative of the circuit temperature and through which the diode element is connected to the node. The value of the variable resistance is adjusted based upon the circuit temperature input. The circuit is useful for application as a peripheral circuitry, such as on a flash or other non-volatile memory and other circuits requiring an on-chip reference voltage source.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: July 24, 2012
    Assignee: SanDisk Technologies Inc.
    Inventors: Feng Pan, Yuxin Wang, Jonathan H. Huynh, Albert Chang, Khin Htoo, Qui Vi Nguyen
  • Publication number: 20110273227
    Abstract: A circuit and corresponding method for providing a reference voltage are presented. The circuit includes a current source having a magnitude with positive temperature correlation connected to a node, and a diode element connected between the node and ground, where the reference voltage is provided from the node. The circuit also includes a variable resistance connected to receive an input indicative of the circuit temperature and through which the diode element is connected to the node. The value of the variable resistance is adjusted based upon the circuit temperature input. The circuit is useful for application as a peripheral circuitry, such as on a flash or other non-volatile memory and other circuits requiring an on-chip reference voltage source.
    Type: Application
    Filed: July 18, 2011
    Publication date: November 10, 2011
    Inventors: Feng Pan, Yuxin Wang, Jonathan H. Huynh, Albert Chang, Khin Htoo, Qui Vi Nguyen
  • Patent number: 8004917
    Abstract: A circuit and corresponding method for providing a reference voltage are presented. The circuit includes a current source having a magnitude with positive temperature correlation connected to a node, and a diode element connected between the node and ground, where the node supplies the reference voltage. The circuit also includes a variable resistance connected to receive an input indicative of the circuit temperature and through which the diode element is connected to the node. The value of the variable resistance is adjusted based upon the circuit temperature input. The circuit is useful for application as a peripheral circuitry, such as on a flash or other non-volatile memory and other circuits requiring an on-chip reference voltage source.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: August 23, 2011
    Assignee: SanDisk Technologies Inc.
    Inventors: Feng Pan, Yuxin Wang, Jonathan H. Huynh, Albert Chang, Khin Htoo, Qui Vi Nguyen
  • Patent number: 7889575
    Abstract: Techniques and corresponding circuitry for deriving a supply a bias voltage for a memory cell array from a received reference voltage is presented. The circuit includes a voltage determination circuit, which is connected to receive the reference voltage and generate from it the bias voltage, a temperature sensing circuit, and a calibration circuit. The calibration circuit is connected to receive the bias voltage and to receive a temperature indication from the temperature sensing circuit and determine from the bias voltage and temperature indication a compensation factor that is supplied to the voltage determination circuit, which adjusts the bias voltage based upon the compensation factor.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: February 15, 2011
    Assignee: SanDisk Corporation
    Inventors: Yuxin Wang, Feng Pan, Byungki Woo, Trung Pham, Khin Htoo
  • Publication number: 20110018617
    Abstract: A charge pump circuit for generating an output voltage is described. Charge pump circuits typically have two branches. As the clocks supplying the branches of a charge pump circuit alternate, the output of each branch will alternately provide an output voltage, which are then combined to form the pump output. The techniques described here allow charge to be transferred between the two branches, so that as the capacitor of one branch discharges, it is used to charge up the capacitor in the other branch.
    Type: Application
    Filed: July 24, 2009
    Publication date: January 27, 2011
    Inventors: Khin Htoo, Feng Pan, Byungki Woo, Trung Pham, Yuxin Wang
  • Publication number: 20100074033
    Abstract: A circuit and corresponding method for providing a reference voltage are presented. The circuit includes a current source having a magnitude with positive temperature correlation connected to a node, and a diode element connected between the node and ground, where the reference voltage is provided from the node. The circuit also includes a variable resistance connected to receive an input indicative of the circuit temperature and through which the diode element is connected to the node. The value of the variable resistance is adjusted based upon the circuit temperature input. The circuit is useful for application as a peripheral circuitry, such as on a flash or other non-volatile memory and other circuits requiring an on-chip reference voltage source.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Inventors: Feng Pan, Yuxin Wang, Jonathan H. Huynh, Albert Chang, Khin Htoo, Qui Vi Nguyen
  • Publication number: 20100073069
    Abstract: Techniques and corresponding circuitry for deriving a supply a bias voltage for a memory cell array from a received reference voltage is presented. The circuit includes a voltage determination circuit, which is connected to receive the reference voltage and generate from it the bias voltage, a temperature sensing circuit, and a calibration circuit. The calibration circuit is connected to receive the bias voltage and to receive a temperature indication from the temperature sensing circuit and determine from the bias voltage and temperature indication a compensation factor that is supplied to the voltage determination circuit, which adjusts the bias voltage based upon the compensation factor.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Inventors: Yuxin Wang, Feng Pan, Byungki Woo, Trung Pham, Khin Htoo