Patents by Inventor Yasuo Satoh
Yasuo Satoh 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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Publication number: 20240250675Abstract: An apparatus according to some embodiments comprises: a first clock path including a first duty-cycle adjuster that adjusts a duty cycle of a first input clock signal, a second clock path including a second duty-cycle adjuster that adjusts a duty cycle of a second input clock signal having a different phase from the first input clock signal; and a control circuit configured to detect longest one or shortest one of first, second, third, and fourth time periods to generate a control signal. The first, second, third and fourth time periods are defined by phase differences between rising edges and falling edges of the first and second input clock signals.Type: ApplicationFiled: April 2, 2024Publication date: July 25, 2024Applicant: MICRON TECHNOLOGY, INC.Inventor: Yasuo Satoh
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Patent number: 11973506Abstract: Disclosed herein is an apparatus that includes a clock generator configured to generate first to fourth clock signals based on an input clock signal, a first duty-cycle detector configured to output a first signal responsive to a comparison between information produced based on the first and second clock signals and based on the third and fourth clock signals, a second duty-cycle detector configured to output a second signal responsive to a comparison between information produced based on the first and fourth clock signals and based on the second and third clock signals, a third duty-cycle detector configured to output a third signal responsive to a comparison between information produced based on the first and third clock signals and based on the second and fourth clock signals, and a duty-cycle adjuster configured to adjust a duty-cycle of the input clock signal responsive to the first to third signals.Type: GrantFiled: June 21, 2022Date of Patent: April 30, 2024Assignee: MICRON TECHNOLOGY, INC.Inventor: Yasuo Satoh
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Publication number: 20230412161Abstract: Disclosed herein is an apparatus that includes a clock generator configured to generate first to fourth clock signals based on an input clock signal, a first duty-cycle detector configured to output a first signal responsive to a comparison between information produced based on the first and second clock signals and based on the third and fourth clock signals, a second duty-cycle detector configured to output a second signal responsive to a comparison between information produced based on the first and fourth clock signals and based on the second and third clock signals, a third duty-cycle detector configured to output a third signal responsive to a comparison between information produced based on the first and third clock signals and based on the second and fourth clock signals, and a duty-cycle adjuster configured to adjust a duty-cycle of the input clock signal responsive to the first to third signals.Type: ApplicationFiled: June 21, 2022Publication date: December 21, 2023Applicant: MICRON TECHNOLOGY, INC.Inventor: Yasuo Satoh
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Patent number: 11843385Abstract: Disclosed herein is an apparatus that includes: a first input node supplied with a first clock signal; a first clock path configured to output a delayed first clock signal, the first clock path including first and second delay elements coupled in series; a second clock path configured to output additional delayed first clock signal, the second clock path including third and fourth delay elements coupled in series; a first mixer circuit configured to interpolate the delayed first clock signal and the additional delayed first clock signal to reproduce an adjusted clock signal as the first clock signal; and a control circuit configured to control delay amounts of the first, second, third, and fourth delay elements with first, second, third, and fourth codes different from one another.Type: GrantFiled: July 5, 2022Date of Patent: December 12, 2023Assignee: Micron Technology, Inc.Inventor: Yasuo Satoh
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Patent number: 11742017Abstract: Apparatuses and methods for adjusting a phase mixer circuit are disclosed. An example method includes providing data values stored by a plurality of first registers and a plurality of second registers. The method includes: during a first mode of operation, receiving the data values by groups of first registers of the plurality of the first registers and holding the data values by the plurality of second registers; during a second mode of operation, inverting a data value by one first register of the plurality of first registers at a time and holding the data values by the plurality of second registers; and during a third mode of operation, either inverting the data value by one first register of the plurality of first registers while holding the data values by the plurality of second registers or inverting a data value by one second register of the plurality of second registers while holding the data values by the plurality of first registers.Type: GrantFiled: March 21, 2022Date of Patent: August 29, 2023Inventor: Yasuo Satoh
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Patent number: 11705896Abstract: Apparatuses and methods of DLL measurement initialization are disclosed. An example apparatus includes: a clock enable circuit that provides a first clock signal having a half frequency of an input clock signal and second clock signals having a quarter frequency of the input clock signal; a coarse delay that provides the first clock signal with a coarse delay; a fine delay that provides the first clock signal with the coarse delay and a fine delay as an output clock signal; a model delay having a feedback delay equivalent to a sum of delays of an input stage and an output stage, and provides a feedback signal that is the output clock signal with the feedback delay; and a measurement initialization circuit that performs measurement initialization. The measurement initialization circuit includes synchronizers that receive the feedback signal and the second clock signals, and provide a stop signal to the coarse delay.Type: GrantFiled: December 2, 2021Date of Patent: July 18, 2023Assignee: Micron Technology, Inc.Inventor: Yasuo Satoh
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Patent number: 11705888Abstract: A memory device includes a terminal calibration circuit having at least one of a pull-down circuit or a pull-up circuit used in calibrating an impedance of a data bus termination. The memory device also includes a reference calibration circuit configured to generate a calibration current. The terminal calibration circuit can be configured to program an impedance of the least one of a pull-down circuit or a pull-up circuit based on the calibration current.Type: GrantFiled: November 2, 2020Date of Patent: July 18, 2023Assignee: Micron Technology, Inc.Inventors: Yasuo Satoh, Hiroki Takahashi, Shuichi Tsukada, Yuan He
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Patent number: 11676650Abstract: A semiconductor device may include a delay locked loop (DLL) control circuit coupled to an update trigger generator and a DLL update circuit. The DLL control circuit may receive an update trigger signal and an internal refresh signal and configured to activate the DLL update circuit responsive to an update trigger in the update trigger signal and deactivate the DLL update circuit responsive to an active internal refresh signal. The DLL update circuit may perform DLL update to one or more memory cell arrays when activated and not perform DLL update to the memory cell arrays when deactivated. The DLL control circuit may reactivate the DLL update circuit once the internal refresh signal becomes inactive. In other scenarios, once the DLL update circuit is deactivated, the DLL update circuit stays deactivated until the next update trigger in the update trigger signal.Type: GrantFiled: June 29, 2021Date of Patent: June 13, 2023Assignee: Micron Technology, Inc.Inventors: Kazutaka Miyano, Yasuo Satoh, Kenji Mae
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Publication number: 20230179192Abstract: Apparatuses and methods of DLL measurement initialization are disclosed. An example apparatus includes: a clock enable circuit that provides a first clock signal having a half frequency of an input clock signal and second clock signals having a quarter frequency of the input clock signal; a coarse delay that provides the first clock signal with a coarse delay; a fine delay that provides the first clock signal with the coarse delay and a fine delay as an output clock signal; a model delay having a feedback delay equivalent to a sum of delays of an input stage and an output stage, and provides a feedback signal that is the output clock signal with the feedback delay; and a measurement initialization circuit that performs measurement initialization. The measurement initialization circuit includes synchronizers that receive the feedback signal and the second clock signals, and provide a stop signal to the coarse delay.Type: ApplicationFiled: December 2, 2021Publication date: June 8, 2023Applicant: MICRON TECHNOLOGY, INC.Inventor: YASUO SATOH
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Patent number: 11646073Abstract: Some embodiments include an integrated assembly having a deck over a base, and having memory cells supported by the deck. Each of the memory cells includes a capacitive unit and a transistor. The individual capacitive units of the memory cells each have a storage node electrode, a plate electrode, and a capacitor dielectric material between the storage node electrode and the plate electrode. A reference-voltage-generator includes resistive units supported by the deck. The resistive units are similar to the memory cells but include interconnecting units in place of the capacitive units. The interconnecting units of some adjacent resistive units are shorted to one another.Type: GrantFiled: April 13, 2022Date of Patent: May 9, 2023Assignee: Micron Technology, Inc.Inventors: Hyunui Lee, Takamasa Suzuki, Yasuo Satoh, Yuan He
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Publication number: 20220301610Abstract: Some embodiments include an integrated assembly having a memory region with memory cells and sense/access lines configured for addressing the memory cells, and having a reference-voltage-generator proximate to the memory region. The reference-voltage-generator includes resistive units configured substantially identically to the sense/access lines. Some embodiments include an integrated assembly having a memory region with memory cells, digit lines and wordlines. Each of the memory cells is uniquely addressed with one of the wordlines in combination with one of the digit lines. The wordlines are coupled with driver circuitry and the digit lines are coupled with sensing circuitry. A reference-voltage-generator is proximate to the memory region. The reference-voltage-generator includes resistive units configured substantially identically to the wordlines and/or includes resistive units configured substantially identically to the digit lines.Type: ApplicationFiled: March 17, 2021Publication date: September 22, 2022Applicant: Micron Technology, Inc.Inventors: Takamasa Suzuki, Yasuo Satoh, Yuan He, Hyunui Lee
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Patent number: 11443788Abstract: Some embodiments include an integrated assembly having a memory region with memory cells and sense/access lines configured for addressing the memory cells, and having a reference-voltage-generator proximate to the memory region. The reference-voltage-generator includes resistive units configured substantially identically to the sense/access lines. Some embodiments include an integrated assembly having a memory region with memory cells, digit lines and wordlines. Each of the memory cells is uniquely addressed with one of the wordlines in combination with one of the digit lines. The wordlines are coupled with driver circuitry and the digit lines are coupled with sensing circuitry. A reference-voltage-generator is proximate to the memory region. The reference-voltage-generator includes resistive units configured substantially identically to the wordlines and/or includes resistive units configured substantially identically to the digit lines.Type: GrantFiled: March 17, 2021Date of Patent: September 13, 2022Assignee: Micron Technology, Inc.Inventors: Takamasa Suzuki, Yasuo Satoh, Yuan He, Hyunui Lee
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Publication number: 20220246193Abstract: Some embodiments include an integrated assembly having a deck over a base, and having memory cells supported by the deck. Each of the memory cells includes a capacitive unit and a transistor. The individual capacitive units of the memory cells each have a storage node electrode, a plate electrode, and a capacitor dielectric material between the storage node electrode and the plate electrode. A reference-voltage-generator includes resistive units supported by the deck. The resistive units are similar to the memory cells but include interconnecting units in place of the capacitive units. The interconnecting units of some adjacent resistive units are shorted to one another.Type: ApplicationFiled: April 13, 2022Publication date: August 4, 2022Applicant: Micron Technology, Inc.Inventors: Hyunui Lee, Takamasa Suzuki, Yasuo Satoh, Yuan He
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Patent number: 11398816Abstract: Apparatuses and methods for adjusting a phase mixer circuit are disclosed. An example apparatus includes a shift register that includes a plurality of registers coupled in series to one another. The plurality of registers are grouped into a first group of registers and a second group of registers. The first group of registers includes first and second registers. The second group of registers includes a third register. The first and second registers of the first group of registers are configured to receive in common an output of the third register of the second group of registers so that both the first and second registers store the output of the third register responsive to a shift clock.Type: GrantFiled: June 21, 2021Date of Patent: July 26, 2022Assignee: Micron Technology, Inc.Inventor: Yasuo Satoh
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Patent number: 11398266Abstract: Embodiments include an integrated assembly having a deck over a base, and having memory cells supported by the deck. Each of the memory cells includes a capacitive unit and a transistor. The individual capacitive units of the memory cells each have a storage node electrode, a plate electrode, and a capacitor dielectric material between the storage node electrode and the plate electrode. A reference-voltage-generator includes resistive units supported by the deck. The resistive units are similar to the memory cells but include interconnecting units in place of the capacitive units. The interconnecting units of some adjacent resistive units are shorted to one another.Type: GrantFiled: January 8, 2021Date of Patent: July 26, 2022Assignee: Micron Technology, Inc.Inventors: Hyunui Lee, Takamasa Suzuki, Yasuo Satoh, Yuan He
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Publication number: 20220230671Abstract: Apparatuses and methods for adjusting a phase mixer circuit are disclosed. An example method includes providing data values stored by a plurality of first registers and a plurality of second registers. The method includes: during a first mode of operation, receiving the data values by groups of first registers of the plurality of the first registers and holding the data values by the plurality of second registers; during a second mode of operation, inverting a data value by one first register of the plurality of first registers at a time and holding the data values by the plurality of second registers; and during a third mode of operation, either inverting the data value by one first register of the plurality of first registers while holding the data values by the plurality of second registers or inverting a data value by one second register of the plurality of second registers while holding the data values by the plurality of first registers.Type: ApplicationFiled: March 21, 2022Publication date: July 21, 2022Applicant: Micron Technology, Inc.Inventor: Yasuo Satoh
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Publication number: 20220223191Abstract: Embodiments include an integrated assembly having a deck over a base, and having memory cells supported by the deck. Each of the memory cells includes a capacitive unit and a transistor. The individual capacitive units of the memory cells each have a storage node electrode, a plate electrode, and a capacitor dielectric material between the storage node electrode and the plate electrode. A reference-voltage-generator includes resistive units supported by the deck. The resistive units are similar to the memory cells but include interconnecting units in place of the capacitive units. The interconnecting units of some adjacent resistive units are shorted to one another.Type: ApplicationFiled: January 8, 2021Publication date: July 14, 2022Applicant: Micron Technology, Inc.Inventors: Hyunui Lee, Takamasa Suzuki, Yasuo Satoh, Yuan He
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Patent number: 11282566Abstract: Apparatuses and methods for adjusting a phase mixer circuit are disclosed. An example method includes providing data values stored by a plurality of first registers and a plurality of second registers. The method includes: during a first mode of operation, receiving the data values by groups of first registers of the plurality of the first registers and holding the data values by the plurality of second registers; during a second mode of operation, inverting a data value by one first register of the plurality of first registers at a time and holding the data values by the plurality of second registers; and during a third mode of operation, either inverting the data value by one first register of the plurality of first registers while holding the data values by the plurality of second registers or inverting a data value by one second register of the plurality of second registers while holding the data values by the plurality of first registers.Type: GrantFiled: January 15, 2020Date of Patent: March 22, 2022Assignee: Micron Technology, Inc.Inventor: Yasuo Satoh
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Patent number: 11237579Abstract: In an example semiconductor device, the voltage/temperature conditions of the semiconductor device and associated calibration codes of multiple instances of ZQ calibrations are pre-stored in a register array. When a pre-stored voltage/temperature condition occurs again, ZQ calibration is not performed. Instead, the associated pre-stored calibration code is retrieved from the register array and provided to the IO circuit. When a voltage/temperature condition of the semiconductor device does not match any pre-stored voltage/temperature condition in the register array, a ZQ calibration is performed. When the ZQ calibration is performed, a register in the register array is selected according to an update policy and updated by the calibration code newly provided by the ZQ calibration along with the voltage/temperature condition at the time when the ZQ calibration is performed.Type: GrantFiled: August 6, 2020Date of Patent: February 1, 2022Assignee: Micron Technology, Inc.Inventors: Yuan He, Yasuo Satoh
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Publication number: 20210358541Abstract: A semiconductor device may include a delay locked loop (DLL) control circuit coupled to an update trigger generator and a DLL update circuit. The DLL control circuit may receive an update trigger signal and an internal refresh signal and configured to activate the DLL update circuit responsive to an update trigger in the update trigger signal and deactivate the DLL update circuit responsive to an active internal refresh signal. The DLL update circuit may perform DLL update to one or more memory cell arrays when activated and not perform DLL update to the memory cell arrays when deactivated. The DLL control circuit may reactivate the DLL update circuit once the internal refresh signal becomes inactive. In other scenarios, once the DLL update circuit is deactivated, the DLL update circuit stays deactivated until the next update trigger in the update trigger signal.Type: ApplicationFiled: June 29, 2021Publication date: November 18, 2021Applicant: Micron Technology, Inc.Inventors: Kazutaka Miyano, Yasuo Satoh, Kenji Mae