A low power consumption, high-speed and wide division ratio range programmable frequency divider designed in 0.18 um SiGe process is presented. the circuit consists of 4/5 dual-modulus prescaler, 5-bit subtraction cou...
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ISBN:
(纸本)9781728189789
A low power consumption, high-speed and wide division ratio range programmable frequency divider designed in 0.18 um SiGe process is presented. the circuit consists of 4/5 dual-modulus prescaler, 5-bit subtraction counter and control logic. the combination of D flip-flops and logic gates effectively reduces the transmission delay and improves the operating frequency of the dual-modulus prescaler. the pulse counter and the swallow counter are merged into one, which reduces the chip area. A novel control logic is adopted to reduce the minimum frequency division ratio by allowing the S value equal to 0. the whole frequency divider is composed of TSPC (true-single-phase-clocked) D flip-flops and complementary CMOS logic gates without static power consumption. the simulation results indicate that the programmable frequency divider has a 4.7 GHz maximum operating frequency, and achieves a continuous division ratio range from 16 to 159, with a power consumption of 5.9 mA at 1.8 V supply voltage at the maximum operating frequency.
In the search for a fuzzy logic equivalent of the FPGA, the authors have developed the design for a programmable fuzzy logic controller chip which can accept up to 4 inputs, provide up to 12 programmable membership fu...
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Conventional reconfigurable architectures, e.g., Field-programmable Gate Array (FPGA), are confronted withthe inflexibility of the on-chip local memory architecture and the scarce memory resource, which result in the...
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ISBN:
(纸本)9781665423144
Conventional reconfigurable architectures, e.g., Field-programmable Gate Array (FPGA), are confronted withthe inflexibility of the on-chip local memory architecture and the scarce memory resource, which result in the inflexibility to deal withthe current memory-thirsty data-intensive applications. Emerging nonvolatile devices, such as resistive random-access memory (RRAM), can operate in a logic-in-memory way, i.e., they can act as both a nonvolatile memory element and a switch, and thus, have the potential to provide higher flexibility and data processing ability. We propose a field-programmablelogic-in-memory architecture based on RRAM technology, which is a two-dimensional tile array, where each tile is an RRAM-based crossbar array and can be remolded into three basic modes including logic, interconnect and memory. We further develop a specific adaptive algorithm for placement and routing, which can well exploit the logic-in-memory architecture characteristics. Comparing with traditional FPGAs, our architecture shows 1.9x lower power consumption, 2.8x lower delay, and 5.6x higher performance.
Because of its advantages of the short design turnaround time and the convenience and low cost in integrated circuit prototyping and verification. the field programmable gate array (FPGA) has been widely utilized in m...
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ISBN:
(纸本)078037889X
Because of its advantages of the short design turnaround time and the convenience and low cost in integrated circuit prototyping and verification. the field programmable gate array (FPGA) has been widely utilized in many fields of electronic design. In this paper, a technology mapping algorithm for FPGA with MUX-LUT mixed architecture is presented. this algorithm, FMAP, is used in a design-aided software system for FPGA, which is developed specifically for ail FPGA chip. FDP, with MUX-LUT mixed architecture. the bench marking result of technology mapping for FDP by FMAP is compared to the result of the Xilinx series by their design system. the result is also presented in this paper.
A Synthetic Aperture Radar (SAR) is built around a physical matrix of independent Transmit & Receive Modules (TRM). Each TRM has several parameters to be controlled to attain optimal performance and to compensate ...
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ISBN:
(纸本)9781424419920
A Synthetic Aperture Radar (SAR) is built around a physical matrix of independent Transmit & Receive Modules (TRM). Each TRM has several parameters to be controlled to attain optimal performance and to compensate production dispersion and operation drift, and for calibration of the complete TR chain. the SAR is an instrument of the SAOCOM Low Earth Orbit satellite, which will be launched on 2010. It has 105 TRM, organized in 21 tiles, each one containing 5 TRM and a redundant controller. this paper presents the project and implementation of the redundant controller, based around a space qualified antifuse FPGA. this device was chosen after evaluation of SRAM, FLASH and antifuse technologies, and special considerations have been taken to reduce components count, minimize power consumption, cost, weight, and improve reliability.
the IEC 61131-3 standard defines a common framework for programming PLCs (programmablelogic Controllers), which includes the complete definition of four programming languages and a state machine definition language. ...
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ISBN:
(纸本)9781424408504
the IEC 61131-3 standard defines a common framework for programming PLCs (programmablelogic Controllers), which includes the complete definition of four programming languages and a state machine definition language. Industrial PLC vendors are slowly offering support for this standard, however small inconsistencies remain between their implementations, transferring programs between vendors is almost impossible due to different rile formats, and licenses are generally too expensive to allow students do install these commercial solutions on their own computers. To this end, the authors have developed an Integrated Development Environment (IDE) for the IEC 61131-3 framework, which is being offered to the general public under the GNU Public License (GPL). the IDE consists of a Graphical User Interface (GUI) and a backend compiler. Using the GUI the user may develop programs in any of the four programming languages, as well as the state machine definition language. the backend compiler is used to convert these programs into equivalent C++ programs which may later be compiled and executed on various platforms.
Many well - established manufacturers today find themselves using two or three different brands of programmablelogic controllers. these controllers are usually networked for greater flexibility. However, as most cont...
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Many well - established manufacturers today find themselves using two or three different brands of programmablelogic controllers. these controllers are usually networked for greater flexibility. However, as most controllers are designed to communicate only with others of the same brand, each brand requires its own network. the parallel protocol discussed in this paper is designed to provide high speed data transfer between networks of different brands of controllers regardless of architecture.
the principle of wind turbine generator (WTG) and its control system based on programmablelogic controller (PLC) are presented. the wind energy is converted into electric energy by WTG. Because of the uncertainties o...
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ISBN:
(纸本)1424404487
the principle of wind turbine generator (WTG) and its control system based on programmablelogic controller (PLC) are presented. the wind energy is converted into electric energy by WTG. Because of the uncertainties of the speed, the direction of the wind, and the large inertia of the wind turbine of WTG, reliable control strategies are adopted to assure the WTG to run normally under serious conditions. According to the special requirement of the control system of 55kW WTG, a gate method is used to get the precise measurement of the generator's speed. the generator can be merged into or disengaged from the power system safely by the control system. the crosswind protection of the wind turbine and casting loose automatically are also realized. the practical running results show that the control system is reliable.
In this paper, a new realization for logic functions, namely Reversible programmablelogic Array (RPLA), has been proposed. the proposed realization has the advantage of regularity as compared to the existing non-PLA ...
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In the following work, a project for compiler that maps program loops onto a processor withprogrammable accelerator is presented. the processor withprogrammable architecture could be a system on a chip containing re...
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In the following work, a project for compiler that maps program loops onto a processor withprogrammable accelerator is presented. the processor withprogrammable architecture could be a system on a chip containing regular computational cores as well as a programmable circuit. A classification of loops according to information dependencies is suggested. For each loop class, the possibility and method for automatic organization of hardware support with an FPGA are examined. the compiler under study differs from the regular ones for the presence of a converter from C to the hardware description language as well as a driver library for data transfer between a CPU and accelerator.
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