Patents by Inventor Deepak Pancholi
Deepak Pancholi 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).
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Patent number: 9627954Abstract: A buck power converter creates a desired output voltage from a greater input voltage with higher efficiency than linear regulators or charge pumps. For compact-size and cost sensitive products, the use of the buck power converter is hindered mainly because of lack of physical space and increases in the cost of the passive components like the inductor and capacitor. Techniques are presented to reduce the sizes of the passive components so that they can be integrated on-chip or in-package or on board. A signal converter in the buck power converter determines the duty cycle of a switching control signal. The switching control signal would ordinarily have driven a power switching circuit that provides current to the inductor in the buck power converter. The signal converter outputs a modified (multiphase) switching control signal that includes multiple separated on-periods that taken together approximate the duty cycle of the switching control signal while maintaining the same control loop frequency.Type: GrantFiled: June 6, 2011Date of Patent: April 18, 2017Assignee: SanDisk Technologies LLCInventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 9438164Abstract: A method for calibrating an oscillator in an electronic device and an electronic device configured for calibration are provided. Multiple signals are sent to the electronic device from another electronic device, such as from a host device. With knowledge of the time interval between the multiple signals, the electronic device may calibrate the oscillator in the electronic device. For example, the electronic device may be a USB-compliant electronic device. The USB-compliant electronic device may receive Start of Frame (SoF) signals from a host device, which in one USB implementation is received at 1 mSec intervals. The USB-compliant electronic device may count the output of the oscillator between receipt of different SoF signals in order to determine the frequency of the oscillator at different oscillator settings.Type: GrantFiled: November 14, 2014Date of Patent: September 6, 2016Assignee: SanDisk Technologies LLCInventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 9406346Abstract: An apparatus includes a first semiconductor device including a NAND flash memory core. The apparatus also includes a second semiconductor device including periphery circuitry associated with the NAND flash memory core.Type: GrantFiled: September 28, 2011Date of Patent: August 2, 2016Assignee: SANDISK TECHNOLOGIES LLCInventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9397669Abstract: A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be used to obtain data to calibrate both the oscillator and the temperature sensor. One of the distinct temperatures may comprise an ambient temperature, and a second distinct temperature may comprise a heated temperature greater than the ambient temperature. The electronic device (or a calibration device separate from the electronic device) may receive the readings from the oscillator and the temperature sensor at the two distinct temperatures in the same temperature cycle, and may determine an oscillator correction factor and a temperature sensor correction factor.Type: GrantFiled: April 6, 2015Date of Patent: July 19, 2016Assignee: SanDisk Technologies LLCInventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 9385587Abstract: A controlled start-up circuit mechanism in a linear voltage regulator can handle a higher supply voltage at start-up and limits the voltage seen at the devices to be lower than the maximum allowed operation voltage. The circuit may regulate voltage for operating a device coupled to a host when the host supply exceeds that necessary for device operation. The controlled start-up mechanism handles a sudden ramp up or spike of supply voltage relative to the device's operational voltage.Type: GrantFiled: May 20, 2013Date of Patent: July 5, 2016Assignee: SanDisk Technologies LLCInventors: Deepak Pancholi, Bhavin Odedara, Rohit Reddy
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Patent number: 9218852Abstract: An apparatus includes a first semiconductor device including a memory core. The apparatus also includes a second semiconductor device including periphery circuitry associated with the memory core. The second semiconductor device includes a second serializer/deserializer communication interface coupled to a first serializer/deserializer communication interface of a memory controller.Type: GrantFiled: September 28, 2011Date of Patent: December 22, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9209240Abstract: A capacitor from a Metal-Oxide-Metal (“MoM”) process may include a plurality of metal layers arranged with different design structures. The metal layers may be connected with vias. The metal layers may include wires, such as rows and/or fingers that are arranged for maximizing capacitance between adjacent fingers, as well as between fingers of different metal layers. As the spacing of the fingers is increased, the reliability, yield of final product, and ease of manufacturing both increase. The capacitor increases the spacing of wires/fingers while either maintaining or improving the capacitance per unit area.Type: GrantFiled: February 21, 2013Date of Patent: December 8, 2015Assignee: SanDisk Technologies Inc.Inventors: Santhosh Kumar, Smitha Naganna, Deepak Pancholi
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Publication number: 20150341038Abstract: A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be used to obtain data to calibrate both the oscillator and the temperature sensor. One of the distinct temperatures may comprise an ambient temperature, and a second distinct temperature may comprise a heated temperature greater than the ambient temperature. The electronic device (or a calibration device separate from the electronic device) may receive the readings from the oscillator and the temperature sensor at the two distinct temperatures in the same temperature cycle, and may determine an oscillator correction factor and a temperature sensor correction factor.Type: ApplicationFiled: April 6, 2015Publication date: November 26, 2015Inventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 9177609Abstract: An apparatus includes a first memory die including a first memory core, a second memory die including a second memory core, and a periphery die coupled to the first memory die and to the second memory die. The periphery die includes periphery circuitry corresponding to the first memory core and periphery circuitry corresponding to the second memory core. The periphery die is responsive to a memory controller and configured to initiate a first memory operation at the first memory core and a second memory operation at the second memory core.Type: GrantFiled: September 28, 2011Date of Patent: November 3, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9177610Abstract: An apparatus includes a semiconductor device including a three-dimensional (3D) memory. The 3D memory includes multiple memory cells arranged in multiple physical levels above a substrate. The 3D memory includes circuitry associated with operation of the multiple memory cells and includes a differential signaling interface.Type: GrantFiled: April 7, 2014Date of Patent: November 3, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9177612Abstract: An apparatus includes a semiconductor device that includes a multi-ported three-dimensional (3D) memory. The multi-ported 3D memory includes multiple memory cells arranged in multiple physical levels above a substrate. The multi-ported 3D memory includes circuitry associated with operation of the multiple memory cells.Type: GrantFiled: April 7, 2014Date of Patent: November 3, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9177611Abstract: An apparatus includes a first semiconductor device including a three-dimensional (3D) memory. The 3D memory includes multiple memory cells arranged in multiple physical levels above a substrate. The 3D memory further includes circuitry associated with operation of the multiple memory cells. The apparatus includes a second semiconductor device coupled to the first semiconductor device. The second semiconductor device includes a charge pump, and the 3D memory does not include a charge pump.Type: GrantFiled: April 7, 2014Date of Patent: November 3, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9148157Abstract: Tuning circuitry may include a controller that is configured to determine a phase difference for a pair of signals generated at different points in a master delay line of a master-slave delay locked loop (DLL) circuit. One of signals of the pair may be communicated through a slave delay line of the master-slave DLL circuit before the phase difference is determined. A programming delay value used to set a phase delay of the slave delay line may be adjusted or tuned based on the phase difference.Type: GrantFiled: August 18, 2014Date of Patent: September 29, 2015Assignee: SanDisk Technologies Inc.Inventors: Bhavin Odedara, Deepak Pancholi, Vishal Rustagi
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Patent number: 9142261Abstract: An apparatus includes a semiconductor device that includes a three-dimensional (3D) memory. The 3D memory includes multiple memory cells arranged in multiple physical levels above a substrate. The 3D memory includes circuitry associated with operation of the multiple memory cells and includes a serializer/deserializer interface.Type: GrantFiled: April 7, 2014Date of Patent: September 22, 2015Assignee: SANDISK TECHNOLOGIES INC.Inventors: Manuel Antonio D'Abreu, Stephen Skala, Dimitris Pantelakis, Radhakrishnan Nair, Deepak Pancholi
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Patent number: 9098101Abstract: A proposed inrush control circuit may work in the presence of supply noise. A linear regulator in bypass mode may be designed for inrush current control, but may be susceptible to irregularities from increased supply noise. The circuit may include a splitting of the bypass power MOS that are switched on with some delay during the power on to control the initial power-on inrush current.Type: GrantFiled: February 21, 2013Date of Patent: August 4, 2015Assignee: SanDisk Technologies Inc.Inventors: Prasad Naidu, Deepak Pancholi
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Publication number: 20150214965Abstract: Tuning circuitry may include a controller that is configured to determine a phase difference for a pair of signals generated at different points in a master delay line of a master-slave delay locked loop (DLL) circuit. One of signals of the pair may be communicated through a slave delay line of the master-slave DLL circuit before the phase difference is determined. A programming delay value used to set a phase delay of the slave delay line may be adjusted or tuned based on the phase difference.Type: ApplicationFiled: August 18, 2014Publication date: July 30, 2015Inventors: Bhavin Odedara, Deepak Pancholi, Vishal Rustagi
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Publication number: 20150188491Abstract: A method for calibrating an oscillator in an electronic device and an electronic device configured for calibration are provided. Multiple signals are sent to the electronic device from another electronic device, such as from a host device. With knowledge of the time interval between the multiple signals, the electronic device may calibrate the oscillator in the electronic device. For example, the electronic device may be a USB-compliant electronic device. The USB-compliant electronic device may receive Start of Frame (SoF) signals from a host device, which in one USB implementation is received at 1 mSec intervals. The USB-compliant electronic device may count the output of the oscillator between receipt of different SoF signals in order to determine the frequency of the oscillator at different oscillator settings.Type: ApplicationFiled: November 14, 2014Publication date: July 2, 2015Applicant: SanDisk Technologies Inc.Inventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 9000856Abstract: A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be used to obtain data to calibrate both the oscillator and the temperature sensor. One of the distinct temperatures may comprise an ambient temperature, and a second distinct temperature may comprise a heated temperature greater than the ambient temperature. The electronic device (or a calibration device separate from the electronic device) may receive the readings from the oscillator and the temperature sensor at the two distinct temperatures in the same temperature cycle, and may determine an oscillator correction factor and a temperature sensor correction factor.Type: GrantFiled: July 11, 2014Date of Patent: April 7, 2015Assignee: SanDisk Technologies Inc.Inventors: Deepak Pancholi, Bhavin Odedara
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Patent number: 8862967Abstract: A method may be performed at a data storage device that includes a memory and a controller. The method includes providing user data to a variable-bit error correction coding (ECC) encoder. The ECC encoder generates a first set of parity bits. A first number of parity bits in the first set of parity bits is determined based on stored counts of read errors. The method also includes storing the user data and the first set of parity bits to a memory of the data storage device.Type: GrantFiled: April 19, 2012Date of Patent: October 14, 2014Assignee: Sandisk Technologies Inc.Inventors: Deepak Pancholi, Manuel Antonio D'Abreu, Radhakrishnan Nair, Stephen Skala
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Patent number: 8856712Abstract: A flip-flop operating with standard threshold voltage MOS devices as compared with high threshold voltage MOS devices may have improved speed performance, but greater leakage current. Likewise, a flip-flop operating with high threshold voltage MOS devices may reduce the leakage current and have better power efficiency, but decreased speed and performance. An optimized flip-flop may include a combination of standard threshold voltage MOS devices and high threshold voltage MOS devices. The optimized flip-flop may have less leakage during stand-by mode as compared to a flip-flop with standard threshold voltage MOS devices. In addition, the optimized flip-flop may have better performance and speed as compared to a flip-flop with high threshold voltage MOS devices.Type: GrantFiled: October 24, 2012Date of Patent: October 7, 2014Assignee: SanDisk Technologies Inc.Inventors: Deepak Pancholi, Srikanth Bojja, Bhavin Odedara