In modern VLSI circuit design, there are four fundamental technologies that support the whole chi... more In modern VLSI circuit design, there are four fundamental technologies that support the whole chip design superstructure: (1) processor technology, (2) memory technology, (3) analog technology, and (4) clock technology. Processor technology focuses on the task of computation. Analog technology deals with systems of time-continuous multilevel signals, in contrast to the time-discrete two levels of digital signals. Memory technology specializes in storing and retrieving information at a fast pace and in large amounts. Unlike the other three technologies, the clock circuit is traditionally not used for processing information since it deals with “time”. The role of the clock signal is in voltage-level-based approach and time-based approach. In the voltage-level-based case, the clock signal is only used for marking the information. In the time-based approach, a clock is used both for marking the information and defining the window.In modern VLSI circuit design, there are four fundamental technologies that support the whole chip design superstructure: (1) processor technology, (2) memory technology, (3) analog technology, and (4) clock technology. Processor technology focuses on the task of computation. Analog technology deals with systems of time-continuous multilevel signals, in contrast to the time-discrete two levels of digital signals. Memory technology specializes in storing and retrieving information at a fast pace and in large amounts. Unlike the other three technologies, the clock circuit is traditionally not used for processing information since it deals with “time”. The role of the clock signal is in voltage-level-based approach and time-based approach. In the voltage-level-based case, the clock signal is only used for marking the information. In the time-based approach, a clock is used both for marking the information and defining the window.Controlled Vocabulary Termsanalogue circuits; clocks; memory architecture; Neuromorphics; program processorsanalogue circuits; clocks; memory architecture; Neuromorphics; program processors
2009 IEEE International Symposium on Circuits and Systems, 2009
A frequency synthesizer architecture with a wide tuning range and reduced fractional spurs is pre... more A frequency synthesizer architecture with a wide tuning range and reduced fractional spurs is presented. The proposed topology includes a Sigma-Delta fractional-N synthesizer and an integer flying-adder architecture. Compared to the conventional Sigma-Delta fractional-N frequency synthesizer, this approach has much wider tuning range. Compared to the fractional flying-adder frequency synthesizer, the proposed approach can achieve the same frequency resolution with reduced fractional spurs and alleviates the constraints on the adder design in the flying-adder architecture.
2008 Chinese Control and Decision Conference, 2008
Automatic designing of both architecture and parameters of an artificial neural network is an imp... more Automatic designing of both architecture and parameters of an artificial neural network is an important problem. This paper introduces a new approach for designing artificial neural networks using multi expression programming (MEP-NN). The approach employs the multi expression programming to evolve the architecture and the parameters encoded in the neural network simultaneously. Based on the predefined instruction sets, a MEP-NN
In modern VLSI circuit design, there are four fundamental technologies that support the whole chi... more In modern VLSI circuit design, there are four fundamental technologies that support the whole chip design superstructure: (1) processor technology, (2) memory technology, (3) analog technology, and (4) clock technology. Processor technology focuses on the task of computation. Analog technology deals with systems of time-continuous multilevel signals, in contrast to the time-discrete two levels of digital signals. Memory technology specializes in storing and retrieving information at a fast pace and in large amounts. Unlike the other three technologies, the clock circuit is traditionally not used for processing information since it deals with “time”. The role of the clock signal is in voltage-level-based approach and time-based approach. In the voltage-level-based case, the clock signal is only used for marking the information. In the time-based approach, a clock is used both for marking the information and defining the window.In modern VLSI circuit design, there are four fundamental technologies that support the whole chip design superstructure: (1) processor technology, (2) memory technology, (3) analog technology, and (4) clock technology. Processor technology focuses on the task of computation. Analog technology deals with systems of time-continuous multilevel signals, in contrast to the time-discrete two levels of digital signals. Memory technology specializes in storing and retrieving information at a fast pace and in large amounts. Unlike the other three technologies, the clock circuit is traditionally not used for processing information since it deals with “time”. The role of the clock signal is in voltage-level-based approach and time-based approach. In the voltage-level-based case, the clock signal is only used for marking the information. In the time-based approach, a clock is used both for marking the information and defining the window.Controlled Vocabulary Termsanalogue circuits; clocks; memory architecture; Neuromorphics; program processorsanalogue circuits; clocks; memory architecture; Neuromorphics; program processors
2009 IEEE International Symposium on Circuits and Systems, 2009
A frequency synthesizer architecture with a wide tuning range and reduced fractional spurs is pre... more A frequency synthesizer architecture with a wide tuning range and reduced fractional spurs is presented. The proposed topology includes a Sigma-Delta fractional-N synthesizer and an integer flying-adder architecture. Compared to the conventional Sigma-Delta fractional-N frequency synthesizer, this approach has much wider tuning range. Compared to the fractional flying-adder frequency synthesizer, the proposed approach can achieve the same frequency resolution with reduced fractional spurs and alleviates the constraints on the adder design in the flying-adder architecture.
2008 Chinese Control and Decision Conference, 2008
Automatic designing of both architecture and parameters of an artificial neural network is an imp... more Automatic designing of both architecture and parameters of an artificial neural network is an important problem. This paper introduces a new approach for designing artificial neural networks using multi expression programming (MEP-NN). The approach employs the multi expression programming to evolve the architecture and the parameters encoded in the neural network simultaneously. Based on the predefined instruction sets, a MEP-NN
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Papers by Liming Xiu