Patents by Inventor Ryan Barnhill
Ryan Barnhill 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: 12627273Abstract: One aspect can provide a direct current (DC) feedback circuit. The DC feedback circuit can include a gain path, a first feedback capacitor coupled, in parallel, to the gain path, and an input resistor coupled to an input of the gain path and the first feedback capacitor. The gain path can include an input stage with a pair of transconductance amplifiers, a gain stage with one or more amplifiers, and an output stage with at least one negative feedback amplifier.Type: GrantFiled: October 28, 2022Date of Patent: May 12, 2026Assignee: Hewlett Packard Enterprise Development LPInventors: Ryan Barnhill, Jacquelyn Mary Ingemi, Michael James Marshall, James S. Ignowski
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Patent number: 12132492Abstract: A frontend circuit of a time-interleaved ADC is provided. The frontend circuit can include a track-and-hold circuit to sample an analog input signal to the ADC, a sub-ADC circuit to convert the sampled analog input signal to a digital output signal, and a source-follower circuit. An input of the source-follower circuit can be coupled to an output of the track-and-hold circuit, and an output of the source-follower circuit can be coupled to an input of the sub-ADC circuit. The source-follower circuit is to provide buffering between the track-and-hold circuit and the sub-ADC circuit. The circuit further includes a common-mode-adjusting circuit to dynamically adjust common-mode settings of the time-interleaved ADC. While adjusting the common-mode settings, the common-mode-adjusting circuit can adjust, separately, an input common-mode voltage of the track-and-hold circuit and an input common-mode voltage of the sub-ADC circuit based on current Process, Voltage, and Temperature (PVT) conditions.Type: GrantFiled: December 14, 2022Date of Patent: October 29, 2024Assignee: Hewlett Packard Enterprise Development LPInventors: Dacheng Zhou, Peter Tsugio Kurahashi, Ryan Barnhill, Michael James Marshall
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Publication number: 20240204789Abstract: A frontend circuit of a time-interleaved ADC is provided. The frontend circuit can include a track-and-hold circuit to sample an analog input signal to the ADC, a sub-ADC circuit to convert the sampled analog input signal to a digital output signal, and a source-follower circuit. An input of the source-follower circuit can be coupled to an output of the track-and-hold circuit, and an output of the source-follower circuit can be coupled to an input of the sub-ADC circuit. The source-follower circuit is to provide buffering between the track-and-hold circuit and the sub-ADC circuit. The circuit further includes a common-mode-adjusting circuit to dynamically adjust common-mode settings of the time-interleaved ADC. While adjusting the common-mode settings, the common-mode-adjusting circuit can adjust, separately, an input common-mode voltage of the track-and-hold circuit and an input common-mode voltage of the sub-ADC circuit based on current Process, Voltage, and Temperature (PVT) conditions.Type: ApplicationFiled: December 14, 2022Publication date: June 20, 2024Inventors: Dacheng Zhou, Peter Tsugio Kurahashi, Ryan Barnhill, Michael James Marshall
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Publication number: 20240146264Abstract: One aspect can provide a direct current (DC) feedback circuit. The DC feedback circuit can include a gain path, a first feedback capacitor coupled, in parallel, to the gain path, and an input resistor coupled to an input of the gain path and the first feedback capacitor. The gain path can include an input stage with a pair of transconductance amplifiers, a gain stage with one or more amplifiers, and an output stage with at least one negative feedback amplifier.Type: ApplicationFiled: October 28, 2022Publication date: May 2, 2024Inventors: Ryan Barnhill, Jacquelyn Mary Ingemi, Michael James Marshall, James S. Ignowski
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Patent number: 11201607Abstract: Examples disclosed herein relate to set-reset (SR) latch circuits and methods for manufacturing the same. In some of the disclosed examples, a SR latch circuit includes an inverter storage loop for storing state information and a set of p-channel field-effect transistors (PFETs) for control circuitry. The PFETs may include first and second PFETs connected to a first node of the inverter storage loop, and third and fourth PFETs connected to a second node of the inverter storage loop. Gate terminals of the first and fourth PFETs may be connected to a first control input, and gate terminals of the second and third PFETs may be connected to a second control input.Type: GrantFiled: September 4, 2018Date of Patent: December 14, 2021Assignee: Hewlett Packard Enterprise Development LPInventors: Christopher Allan Poirier, Ryan Barnhill, Dacheng Zhou
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Patent number: 11196593Abstract: One embodiment can provide a sampler for a decision feedback equalizer (DFE). The sampler can include a comparator comprising a resolver and a plurality of amplifiers coupled to the resolver. The plurality of amplifiers are to receive an input signal and one or more feedback signals, and the plurality of amplifiers are coupled to each other in parallel, thereby facilitating a summation of the input signal and the one or more feedback signals. The comparator is to generate an output based on the summation of the input signals and the one or more feedback signals. The sampler can further include an inverter to invert the output of the comparator. The inverted output of the inverter is sent to a tap-1 amplifier to generate a tap-1 feedback signal to be sent to the comparator at a next unit interval (UI).Type: GrantFiled: July 30, 2020Date of Patent: December 7, 2021Assignee: Hewlett Packard Enterprise Development LPInventors: Dacheng Zhou, Daniel Alan Berkram, Ryan Barnhill
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Patent number: 10389342Abstract: A comparator includes a resolver controlled by a resolver clock signal and a differential amplifier controlled by a sampling clock signal. The resolver clock signal and the sampling clock signal are such that amplification at the differential amplifier during the reset phase of the resolver clock signal and the reset phase of the sampling clock signal begins during the resolving phase of the resolver.Type: GrantFiled: June 28, 2017Date of Patent: August 20, 2019Assignee: Hewlett Packard Enterprise Development LPInventors: Dacheng Zhou, Daniel Alan Berkram, Ryan Barnhill, Christopher Allan Poirier, Christopher Wilson
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Publication number: 20190007037Abstract: A comparator includes a resolver controlled by a resolver clock signal and a differential amplifier controlled by a sampling clock signal. The resolver clock signal and the sampling clock signal are such that amplification at the differential amplifier during the reset phase of the resolver clock signal and the reset phase of the sampling clock signal begins during the resolving phase of the resolver.Type: ApplicationFiled: June 28, 2017Publication date: January 3, 2019Inventors: Dacheng Zhou, Daniel Alan Berkram, Ryan Barnhill, Christopher Allan Poirier, Christopher Wilson
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Publication number: 20180375501Abstract: Examples disclosed herein relate to set-reset (SR) latch circuits and methods for manufacturing the same. In some of the disclosed examples, a SR latch circuit includes an inverter storage loop for storing state information and a set of p-channel field-effect transistors (PFETs) for control circuitry. The PFETs may include first and second PFETs connected to a first node of the inverter storage loop, and third and fourth PFETs connected to a second node of the inverter storage loop. Gate terminals of the first and fourth PFETs may be connected to a first control input, and gate terminals of the second and third PFETs may be connected to a second control input.Type: ApplicationFiled: September 4, 2018Publication date: December 27, 2018Inventors: Christopher Allan Poirier, Ryan Barnhill, Dacheng Zhou
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Patent number: 10075150Abstract: Examples disclosed herein relate to set-reset (SR) latch circuits and methods for manufacturing the same. In some of the disclosed examples, a SR latch circuit includes an inverter storage loop for storing state information and a set of p-channel field-effect transistors (PFETs) for control circuitry. The PFETs may include first and second PFETs connected to a first node of the inverter storage loop, and third and fourth PFETs connected to a second node of the inverter storage loop. Gate terminals of the first and fourth PFETs may be connected to a first control input, and gate terminals of the second and third PFETs may be connected to a second control input.Type: GrantFiled: August 3, 2016Date of Patent: September 11, 2018Assignee: Hewlett Packard Enterprise Development LPInventors: Christopher Allan Poirier, Ryan Barnhill, Dacheng Zhou
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Publication number: 20180041199Abstract: Examples disclosed herein relate to set-reset (SR) latch circuits and methods for manufacturing the same. In some of the disclosed examples, a SR latch circuit includes an inverter storage loop for storing state information and a set of p-channel field-effect transistors (PFETs) for control circuitry. The PFETs may include first and second PFETs connected to a first node of the inverter storage loop, and third and fourth PFETs connected to a second node of the inverter storage loop. Gate terminals of the first and fourth PFETs may be connected to a first control input, and gate terminals of the second and third PFETs may be connected to a second control input.Type: ApplicationFiled: August 3, 2016Publication date: February 8, 2018Inventors: Christopher Allan Poirier, Ryan Barnhill, Dacheng Zhou