The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Chris H Kim - One of the best experts on this subject based on the ideXlab platform.
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on chip supply noise regulation using a low power digital switched Decoupling Capacitor circuit
IEEE Journal of Solid-state Circuits, 2009Co-Authors: Hanyong Eom, Chris H KimAbstract:On-chip resonant supply noise in the mid-frequency range (i.e., 50-300 MHz) has been identified as the dominant supply noise component in modern microprocessors. To overcome the limited efficiency of conventional Decoupling Capacitors in reducing the resonant supply noise, this paper proposes a low-power digital switched Decoupling Capacitor circuit. By adaptively switching the connectivity of decaps according to the measured supply noise, the amount of charge provided by the decaps is dramatically boosted leading to an increased damping of the on-chip supply network. Analysis on the charge transfer during the switching events shows a 6-13X boost of effective decap value. Simulations verify the enhanced noise Decoupling performance as well as the effective suppression of the first-droop noise. A 0.13 mum test chip including an on-chip resonance generation circuit and on-chip supply noise sensors was built to demonstrate the proposed switched decap circuit. Measurements confirm an 11X boost in effective decap value and a 9.8 dB suppression in supply noise using the proposed circuit. Compared with previous analog techniques, the proposed digital implementation achieves a 91% reduction in quiescent power consumption with improved tolerance to process-voltage-temperature (PVT) variation and tuning capability for obtaining the optimal switching threshold.
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a switched Decoupling Capacitor circuit for on chip supply resonance damping
Symposium on VLSI Circuits, 2007Co-Authors: Hanyong Eom, Chris H KimAbstract:A low power switched Decoupling Capacitor circuit is proposed to suppress on-chip resonant supply noise. Compared to previous analog techniques, the proposed digital implementation achieves a 9X reduction in quiescent power with improved tolerance to PVT variation and tuning capability for optimal switching threshold. Measurements from a 0.13 mum test chip show an 11X boost in effective decap value and a 9.8 dB suppression in resonant supply noise by using the proposed circuit.
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distributed active Decoupling Capacitors for on chip supply noise cancellation in digital vlsi circuits
Symposium on VLSI Circuits, 2006Co-Authors: Ramesh Harjani, Chris H KimAbstract:A distributed active Decoupling Capacitor (decap) circuit is proposed to suppress the on-chip power supply noise in digital VLSI circuits. Effectiveness on suppressing local supply noise is verified from a 0.18mum test chip using multiple on-chip supply noise generators and supply noise sensors. Measurements show 4-11times boost in decap value over conventional passive decaps for frequencies up to 1 Hz. Decap area reduction of 40% is achieved
Issa Batarseh - One of the best experts on this subject based on the ideXlab platform.
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a review of power Decoupling techniques for microinverters with three different Decoupling Capacitor locations in pv systems
IEEE Transactions on Power Electronics, 2013Co-Authors: Haibing Hu, Souhib Harb, Issa Batarseh, Nasser Kutkut, Z J ShenAbstract:The reliability of the microinverter is a very important feature that will determine the reliability of the ac-module photovoltaic (PV) system. Recently, many topologies and techniques have been proposed to improve its reliability. This paper presents a thorough study for different power Decoupling techniques in single-phase microinverters for grid-tie PV applications. These power Decoupling techniques are categorized into three groups in terms of the Decoupling Capacitor locations: 1) PV-side Decoupling; 2) dc-link Decoupling; and 3) ac-side Decoupling. Various techniques and topologies are presented, compared, and scrutinized in scope of the size of Decoupling Capacitor, efficiency, and control complexity. Also, a systematic performance comparison is presented for potential power Decoupling topologies and techniques.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
Haibing Hu - One of the best experts on this subject based on the ideXlab platform.
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a review of power Decoupling techniques for microinverters with three different Decoupling Capacitor locations in pv systems
IEEE Transactions on Power Electronics, 2013Co-Authors: Haibing Hu, Souhib Harb, Issa Batarseh, Nasser Kutkut, Z J ShenAbstract:The reliability of the microinverter is a very important feature that will determine the reliability of the ac-module photovoltaic (PV) system. Recently, many topologies and techniques have been proposed to improve its reliability. This paper presents a thorough study for different power Decoupling techniques in single-phase microinverters for grid-tie PV applications. These power Decoupling techniques are categorized into three groups in terms of the Decoupling Capacitor locations: 1) PV-side Decoupling; 2) dc-link Decoupling; and 3) ac-side Decoupling. Various techniques and topologies are presented, compared, and scrutinized in scope of the size of Decoupling Capacitor, efficiency, and control complexity. Also, a systematic performance comparison is presented for potential power Decoupling topologies and techniques.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
Z J Shen - One of the best experts on this subject based on the ideXlab platform.
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a review of power Decoupling techniques for microinverters with three different Decoupling Capacitor locations in pv systems
IEEE Transactions on Power Electronics, 2013Co-Authors: Haibing Hu, Souhib Harb, Issa Batarseh, Nasser Kutkut, Z J ShenAbstract:The reliability of the microinverter is a very important feature that will determine the reliability of the ac-module photovoltaic (PV) system. Recently, many topologies and techniques have been proposed to improve its reliability. This paper presents a thorough study for different power Decoupling techniques in single-phase microinverters for grid-tie PV applications. These power Decoupling techniques are categorized into three groups in terms of the Decoupling Capacitor locations: 1) PV-side Decoupling; 2) dc-link Decoupling; and 3) ac-side Decoupling. Various techniques and topologies are presented, compared, and scrutinized in scope of the size of Decoupling Capacitor, efficiency, and control complexity. Also, a systematic performance comparison is presented for potential power Decoupling topologies and techniques.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
Souhib Harb - One of the best experts on this subject based on the ideXlab platform.
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a review of power Decoupling techniques for microinverters with three different Decoupling Capacitor locations in pv systems
IEEE Transactions on Power Electronics, 2013Co-Authors: Haibing Hu, Souhib Harb, Issa Batarseh, Nasser Kutkut, Z J ShenAbstract:The reliability of the microinverter is a very important feature that will determine the reliability of the ac-module photovoltaic (PV) system. Recently, many topologies and techniques have been proposed to improve its reliability. This paper presents a thorough study for different power Decoupling techniques in single-phase microinverters for grid-tie PV applications. These power Decoupling techniques are categorized into three groups in terms of the Decoupling Capacitor locations: 1) PV-side Decoupling; 2) dc-link Decoupling; and 3) ac-side Decoupling. Various techniques and topologies are presented, compared, and scrutinized in scope of the size of Decoupling Capacitor, efficiency, and control complexity. Also, a systematic performance comparison is presented for potential power Decoupling topologies and techniques.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
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a three port flyback for pv microinverter applications with power pulsation Decoupling capability
IEEE Transactions on Power Electronics, 2012Co-Authors: Haibing Hu, Souhib Harb, Xiang Fang, Z J Shen, Dehua Zhang, Qian Zhang, Issa BatarsehAbstract:A novel single-stage photovoltaic (PV) microinverter with power Decoupling capability is proposed in this paper. The proposed topology is based on three-port flyback with one port dedicated to power Decoupling function so as to reduce the Decoupling capacitance, thus allowing for long lifetime film Capacitor to be used. Operation principle is analyzed in details. Key design considerations, including key parameter selections, predictive control strategy, and the dc voltage balance control across the power Decoupling Capacitor, are given in this paper. A 100-W microinverter prototype is built to verify the proposed topology. Experimental results show the proposed topology can achieve power Decoupling, while maintaining good efficiency.
