Patents by Inventor Marios C. Papaefthymiou
Marios C. Papaefthymiou 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: 9041451Abstract: A resonant clock distribution network architecture is proposed that enables a resonant clock network to track the impact of parameter variations on the insertion delay of a conventional clock distribution network, thus limiting clock skew between the two networks and yielding increased performance. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: GrantFiled: December 13, 2012Date of Patent: May 26, 2015Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8659338Abstract: A resonant clock distribution network architecture is proposed that uses clock drivers of programmable size and reference clocks of programmable duty cycle to achieve a target clock rise time and clock amplitude with low energy consumption when operating in any one of multiple clock frequencies in resonant or non-resonant mode. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: GrantFiled: October 12, 2010Date of Patent: February 25, 2014Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Publication number: 20140015585Abstract: A resonant clock distribution network architecture is proposed that enables a resonant clock network to track the impact of parameter variations on the insertion delay of a conventional clock distribution network, thus limiting clock skew between the two networks and yielding increased performance. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: ApplicationFiled: December 13, 2012Publication date: January 16, 2014Applicant: CYCLOS SEMICONDUCTOR, INC.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8593183Abstract: An architecture for controlling the clock waveform characteristics, including but not limited to the clock amplitude and clock rise and/or fall times, of resonant clock distribution networks is proposed. This architecture relies on controlling the size of clock drivers and the duty cycles of reference clocks. It is targeted at resonant clock distribution networks and allows for the adjustment of resonant clock waveform characteristics with no need to route an additional power grid. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: GrantFiled: October 12, 2010Date of Patent: November 26, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8502569Abstract: An architecture for resonant clock distribution networks is proposed. The proposed architecture allows for the energy-efficient operation of the resonant clock distribution network in conventional mode, so that it meets target specifications for the clock waveform. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to at-speed testing and to binning of semiconductor devices according to achievable performance levels.Type: GrantFiled: October 12, 2010Date of Patent: August 6, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8461873Abstract: A clock and data distribution network is proposed that distributes clock and data signals without buffers, thus achieving very low jitter, skew, loose timing requirements, and energy consumption. Such network uses resonant drivers and is generally applicable to architectures for programmable logic devices (PLDs) such as field programmable gate arrays (FPGAs), as well as other semiconductor devices with multiple clock networks operating at various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, applications specific integrated circuits (ASICs), and Systems-on-a-Chip (SOCs).Type: GrantFiled: May 9, 2011Date of Patent: June 11, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Alexander T. Ishii, Marios C. Papaefthymiou
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Patent number: 8400192Abstract: An architecture for resonant clock distribution networks is proposed. This architecture allows for the energy-efficient operation of a resonant clock distribution network at multiple clock frequencies through the deployment of flip-flops that can be selectively enabled. The proposed architecture is primarily targeted at the design of resonant clock networks with integrated inductors and exhibits no inductor overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.Type: GrantFiled: October 12, 2010Date of Patent: March 19, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8368450Abstract: An inductor architecture for resonant clock distribution networks is proposed. This architecture allows for the adjustment of the natural frequency of a resonant clock distribution network, so that it achieves energy-efficient operation at multiple clock frequencies. The proposed architecture is primarily targeted at the design of integrated inductors and exhibits relatively low area overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.Type: GrantFiled: October 12, 2010Date of Patent: February 5, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8362811Abstract: A resonant clock distribution network architecture is proposed that is capable of single-step operation through the use of selective control in the resonant clock drivers and the deployment of flip-flops that require the clock to remain stable for a sufficiently long time between any two consecutive state updates. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: GrantFiled: October 12, 2010Date of Patent: January 29, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8358163Abstract: A resonant clock distribution network architecture is proposed that enables a resonant clock network to track the impact of parameter variations on the insertion delay of a conventional clock distribution network, thus limiting clock skew between the two networks and yielding increased performance. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: GrantFiled: October 12, 2010Date of Patent: January 22, 2013Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8339209Abstract: An inductor architecture for resonant clock distribution networks is described. This architecture allows for the adjustment of the natural frequency of a resonant clock distribution network, so that it achieves energy-efficient operation at multiple clock frequencies. The proposed architecture exhibits no inductor overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.Type: GrantFiled: October 12, 2010Date of Patent: December 25, 2012Assignee: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 8289063Abstract: Disclosed herein is a digital system that includes a distribution network having a path to carry a reference clock and an adjustable delay element disposed along the path, and first and second clock domains coupled to the distribution network to receive the reference clock and configured to be driven by respective clock waveforms, each of which has a frequency in common with the reference clock. The digital system further includes a phase detector coupled to the first and second clock domains to generate a phase difference signal based on the clock waveforms, and a control circuit coupled to the phase detector and configured to adjust the adjustable delay element based on the phase difference signal.Type: GrantFiled: May 18, 2011Date of Patent: October 16, 2012Assignee: The Regents of the University of MichiganInventors: Juang-Ying Chueh, Jerry Kao, Visvesh Sathe, Marios C. Papaefthymiou, Conrad Ziesler
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Publication number: 20110215854Abstract: Disclosed herein is a digital system that includes a distribution network having a path to carry a reference clock and an adjustable delay element disposed along the path, and first and second clock domains coupled to the distribution network to receive the reference clock and configured to be driven by respective clock waveforms, each of which has a frequency in common with the reference clock. The digital system further includes a phase detector coupled to the first and second clock domains to generate a phase difference signal based on the clock waveforms, and a control circuit coupled to the phase detector and configured to adjust the adjustable delay element based on the phase difference signal.Type: ApplicationFiled: May 18, 2011Publication date: September 8, 2011Applicant: The Regents of the University of MichiganInventors: Juang-Ying Chueh, Jerry Kao, Visvesh Sathe, Marios C. Papaefthymiou, Conrad Ziesler
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Publication number: 20110210761Abstract: A clock and data distribution network is proposed that distributes clock and data signals without buffers, thus achieving very low jitter, skew, loose timing requirements, and energy consumption. Such network uses resonant drivers and is generally applicable to architectures for programmable logic devices (PLDs) such as field programmable gate arrays (FPGAs), as well as other semiconductor devices with multiple clock networks operating at various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, applications specific integrated circuits (ASICs), and Systems-on-a-Chip (SOCs).Type: ApplicationFiled: May 9, 2011Publication date: September 1, 2011Inventors: Alexander T. Ishii, Marios C. Papaefthymiou
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Patent number: 7973565Abstract: A clock and data distribution network is proposed that distributes clock and data signals without buffers, thus achieving very low jitter, skew, loose timing requirements, and energy consumption. Such network uses resonant drivers and is generally applicable to architectures for programmable logic devices (PLDs) such as field programmable gate arrays (FPGAs), as well as other semiconductor devices with multiple clock networks operating at various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, applications specific integrated circuits (ASICs), and Systems-on-a-Chip (SOCs).Type: GrantFiled: May 21, 2008Date of Patent: July 5, 2011Assignee: Cyclos Semiconductor, Inc.Inventors: Alexander Ishii, Marios C. Papaefthymiou
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Publication number: 20110140753Abstract: A resonant clock distribution network architecture is proposed that uses clock drivers of programmable size and reference clocks of programmable duty cycle to achieve a target clock rise time and clock amplitude with low energy consumption when operating in any one of multiple clock frequencies in resonant or non-resonant mode. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: ApplicationFiled: October 12, 2010Publication date: June 16, 2011Applicant: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Patent number: 7956664Abstract: Disclosed herein is a digital system that includes a distribution network having a path to carry a reference clock and an adjustable delay element disposed along the path, and first and second clock domains coupled to the distribution network to receive the reference clock and configured to be driven by respective clock waveforms, each of which has a frequency in common with the reference clock. The digital system further includes a phase detector coupled to the first and second clock domains to generate a phase difference signal based on the clock waveforms, and a control circuit coupled to the phase detector and configured to adjust the adjustable delay element based on the phase difference signal.Type: GrantFiled: December 3, 2007Date of Patent: June 7, 2011Assignee: The Regents of the University of MichiganInventors: Juang-Ying Chueh, Jerry Kao, Visvesh Sathe, Marios C. Papaefthymiou, Conrad Ziesler
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Publication number: 20110090019Abstract: An architecture for resonant clock distribution networks is proposed. This architecture allows for the energy-efficient operation of a resonant clock distribution network at multiple clock frequencies through the deployment of flip-flops that can be selectively enabled. The proposed architecture is primarily targeted at the design of resonant clock networks with integrated inductors and exhibits no inductor overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.Type: ApplicationFiled: October 12, 2010Publication date: April 21, 2011Applicant: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Publication number: 20110090018Abstract: An inductor architecture for resonant clock distribution networks is proposed. This architecture allows for the adjustment of the natural frequency of a resonant clock distribution network, so that it achieves energy-efficient operation at multiple clock frequencies. The proposed architecture is primarily targeted at the design of integrated inductors and exhibits relatively low area overheads. Such an architecture is generally applicable to semiconductor devices with multiple clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs. Moreover, it is applicable to the binning of semiconductor devices according to achievable performance levels.Type: ApplicationFiled: October 12, 2010Publication date: April 21, 2011Applicant: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii
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Publication number: 20110084773Abstract: A resonant clock distribution network architecture is proposed that is capable of single-step operation through the use of selective control in the resonant clock drivers and the deployment of flip-flops that require the clock to remain stable for a sufficiently long time between any two consecutive state updates. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.Type: ApplicationFiled: October 12, 2010Publication date: April 14, 2011Applicant: Cyclos Semiconductor, Inc.Inventors: Marios C. Papaefthymiou, Alexander Ishii