Patents by Inventor Bryan S. Puckett
Bryan S. Puckett 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: 11057043Abstract: Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.Type: GrantFiled: July 13, 2020Date of Patent: July 6, 2021Assignee: ANALOG DEVICES, INC.Inventors: Ahmed Mohamed Abdelatty Ali, Bryan S. Puckett
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Publication number: 20200350921Abstract: Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.Type: ApplicationFiled: July 13, 2020Publication date: November 5, 2020Applicant: Analog Devices, Inc.Inventors: Ahmed Mohamed Abdelatty ALI, Bryan S. PUCKETT
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Patent number: 10763878Abstract: Background calibration techniques can effectively to correct for memory, kick-back, and order-dependent errors in interleaved switched-capacitor track-and-hold (T/H) circuits and amplifiers. The techniques calibrate for errors in both the track/sample phase and the hold-phase, and account for the effects of interleaving, buffer/amplifier sharing, incomplete resetting, incomplete settling, chopping, and randomization on the offset, gain, memory, and kick-back errors. Moreover, the techniques can account for order-dependent and state-dependent hold-phase non-linearities. By correcting for these errors, the proposed techniques improve the noise performance, linearity, gain/offset matching, frequency response (and bandwidth), and order-dependence errors. The techniques also help increase the speed (sample rate and bandwidth) and linearity of T/H circuits and amplifiers while simplifying the analog circuitry and clocking needed.Type: GrantFiled: March 25, 2019Date of Patent: September 1, 2020Assignee: ANALOG DEVICES, INC.Inventors: Ahmed Mohamed Abdelatty Ali, Paridhi Gulati, Bryan S. Puckett, Huseyin Dinc
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Patent number: 10715162Abstract: Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.Type: GrantFiled: February 1, 2019Date of Patent: July 14, 2020Assignee: ANALOG DEVICES, INC.Inventors: Ahmed Mohamed Abdelatty Ali, Bryan S. Puckett
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Publication number: 20190305791Abstract: Background calibration techniques can effectively to correct for memory, kick-back, and order-dependent errors in interleaved switched-capacitor track-and-hold (T/H) circuits and amplifiers. The techniques calibrate for errors in both the track/sample phase and the hold-phase, and account for the effects of interleaving, buffer/amplifier sharing, incomplete resetting, incomplete settling, chopping, and randomization on the offset, gain, memory, and kick-back errors. Moreover, the techniques can account for order-dependent and state-dependent hold-phase non-linearities. By correcting for these errors, the proposed techniques improve the noise performance, linearity, gain/offset matching, frequency response (and bandwidth), and order-dependence errors. The techniques also help increase the speed (sample rate and bandwidth) and linearity of T/H circuits and amplifiers while simplifying the analog circuitry and clocking needed.Type: ApplicationFiled: March 25, 2019Publication date: October 3, 2019Applicant: Analog Devices, Inc.Inventors: Ahmed Mohamed Abdelatty ALI, Paridhi GULATI, Bryan S. PUCKETT, Huseyin DINC
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Publication number: 20190273505Abstract: Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.Type: ApplicationFiled: February 1, 2019Publication date: September 5, 2019Applicant: Analog Devices, Inc.Inventors: Ahmed Mohamed Abdelatty ALI, Bryan S. PUCKETT
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Patent number: 9577616Abstract: An exemplary level shifter includes a clock level shifter configured to generate a level shifted clock signal from an input clock signal; and a switched capacitor logic controller coupled to the clock level shifter. The switched capacitor logic controller is configured to steer the level shifted clock signal based on a data signal and the input clock signal, providing a level shifted version of the data signal.Type: GrantFiled: January 19, 2015Date of Patent: February 21, 2017Assignee: ANALOG DEVICES, INC.Inventors: Ralph D. Moore, Bryan S. Puckett, Brad P. Jeffries
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Publication number: 20160211832Abstract: An exemplary level shifter includes a clock level shifter configured to generate a level shifted clock signal from an input clock signal; and a switched capacitor logic controller coupled to the clock level shifter. The switched capacitor logic controller is configured to steer the level shifted clock signal based on a data signal and the input clock signal, providing a level shifted version of the data signal.Type: ApplicationFiled: January 19, 2015Publication date: July 21, 2016Applicant: ANALOG DEVICES, INC.Inventors: Ralph D. Moore, Bryan S. Puckett, Brad P. Jeffries
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Patent number: 6822519Abstract: Synthesizer structures and alignment methods are provided that facilitate quadrature demodulation. The structures are realized with phase-locked loops that include half-rate frequency dividers to provide loop output signals with a wide range of output frequencies and with frequency dividers that provide quadrature signals in response to the output signals. The structures include controllers that direct alignment methods which lock a VCO to a reference signal from a reference frequency divider to thereby provide the output signals.Type: GrantFiled: February 10, 2003Date of Patent: November 23, 2004Assignee: Analog Devices, Inc.Inventors: Carl W. Moreland, Bryan S. Puckett