Dissertations / Theses on the topic 'Pass Transistor Logic (PTL)'
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Garg, Rajesh. "Generalized buffering of pass transistor logic (PTL) stages using Boolean division and don't cares." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5906.
Full textRagavan, Rengarajan. "Reconfigurable FSM for Ultra-Low Power Wireless Sensor Network Nodes." Thesis, Linköpings universitet, Elektroniska komponenter, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-100121.
Full textVaradharajan, Swetha. "Digital and Analog Applications of Double Gate Mosfets." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1132759182.
Full textHenry, Michael B. "Emerging Power-Gating Techniques for Low Power Digital Circuits." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/29627.
Full textPh. D.
Tsai, Ming-Yu, and 蔡明諭. "An Efficient Hybrid CMOS/PTL (Pass-Transistor-Logic) Synthesizer and Its Applications to the Design of Arithmetic Units and 3D Graphics Processors." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/09027930047814983581.
Full text國立中山大學
資訊工程學系研究所
98
The mainstream of current VLSI design and logic synthesis is based on traditional CMOS logic circuits. However, in the past two decades, various new logic circuit design styles based on pass-transistor logic (PTL) have been proposed. Compared with CMOS circuits, these PTL-based circuits are claimed to have better results in area, speed, and power in some particular applications, such as adder and multiplier designs. Since most current automatic logic synthesis tools (such as Synopsys Design Compiler) are based on conventional CMOS standard cell library, the corresponding logic minimization for CMOS logic cannot be directly employed to generate efficient PTL circuits. In this dissertation, we develop two novel PTL synthesizers that can efficiently generate PTL-based circuits. One is based on pure PTL cells; the other mixes CMOS and PTL cells in the standard cell library to achieve better performance in area, speed, and power. Since PTL-based circuits are constructed by only a few basic PTL cells, the layouts in PTL cells can be easily updated to design large SoC systems as the process technology migrates rapidly in current Nano technology era. The proposed PTL logic synthesis flows employ the popular Synopsys Design Compiler (DC) to perform logic translation and minimization based on the standard cell library composed of PTL and CMOS cells, thus, the PTL design flow can be easily embedded in the standard cell-based ASIC design flow. In this dissertation, we also discuss PTL-based designs of some fundamental hardware components. Furthermore, the proposed PTL cell library is used to synthesize large processor systems in applications of computer arithmetic and 3D graphics.
WANG, JIA-LONG, and 王家龍. "Area-optimal pass transistor logic minimization." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/79027637899409777660.
Full textChen, Shi Zong, and 陳世宗. "Sirup: single rail up-down pass-transistor-logic." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/65632113048817408437.
Full textHsu, Chih-Cheng, and 許志成. "Automatic Optimization in Pass-Transistor-Based Logic Synthesizer." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/86877104888035726165.
Full text國立中山大學
資訊工程學系研究所
88
In this thesis, An automatic optimization logic synthesizer in pass-transistor-based is developed for logic mapping of the combinational circuits. The format of inputs is Boolean functions with expression of sum of product and we can input several functions for hardware sharing at the same time. Depending the difference of circuits, we use the RC delay model to do optimization for both area and speed performance. The final, output is Verilog gate-level code and HSPICE netlist that provide Verilog-in for automatic place-and-route and simulation. It only needs little executing time for searching the best result and we can quickly gate it.
VEN-CHIEH, HSIEH, and 謝文傑. "A New Logic Synthesis and Optimization Procedure Using Pass-Transistor Logic." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/96660896455884414515.
Full text淡江大學
電機工程學系
88
At logic design level, a proper choice of a circuit style for implementing combinational logic is very important. Many kinds of logic styles using pass-transistor circuit have been proposed with the objective to improve the performance of static CMOS logic. And the advantages present by pass-transistor logic have been proved in many cases from 2-input XOR gate to Multiplier. But when compares to classical NAND/NOR or some other simple logic gate, functions can be realized with better performance and smaller area by using static CMOS logic. The result a logic style may provide high performance only in some specific logic functions may confuse someone in logic style selecting. So a formulation of universal rules for optimal logic style, which provide high performance for arbitrary logic function, is needed. Moreover, the static CMOS logic network structure can be seems as a special case of the pass-transistor logic network that pass variables are only power lines. Thus, it is possible to develop a new logic style combine the advantages of both static CMOS logic and pass-transistor logic for arbitrary logic function and high performance applications. The objective of this work is to propose a new logic circuit synthesis and optimization procedure for arbitrary logic function implementation. Follow the synthesis and optimization procedures, a high performance new circuit which is low power consumption, low power-delay product, area efficient and high robustness against transistor downsizing and voltage scaling will produced.
Chen, Jian-Hung, and 陳建宏. "Low Power and High Speed Logic Synthesis with Pass Transistor Logic." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/59671970997835239984.
Full text國立中山大學
資訊工程學系研究所
89
In this thesis, a pass-transistor logic synthesizer is developed for logic mapping of any combinational circuits based on only two types of cells: 2-to-1 multiplexors and inverters. The input contains several sum-of-product Boolean function expressions. Our synthesizer will consider the hardware sharing among these Boolean functions in order to save area. The output of our synthesizer is pass-transistor-based circuits with optimized transistor width in terms of user-specified speed and power performance measurement. During optimization, the Elmore RC delay model is used to estimate the critical path delay and the power is characterized by the switching of all the internal nodes. The final outputs are HSPICE netlists and Verilog gate-level code that allow more detailed timing simulation and automatic placement-routing.
Teng-Yuan, Lin, and 林鼎源. "Analysis and Applications of Pass-Transistor/ CMOS Collaborated Logic." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/09404824821994602851.
Full text大同工學院
電機工程研究所
86
This thesis focuses on the analysis and application of PCCL. The PCCL is especially used in low-power VLSI and a universal gate. We try to implement a set of logic functions and discuss the waveforms attenuated by pass-transistors. We discuss the technique improved by inverter-restoring and the waveform can be restored to at 500 MHz operation frequency. We try to replace the level-restoring circuit of PCCL by inverter-latch one. Finally, we don't implement by BDD, but implement by AND and OR gates of convWe simulate the critical-path waveform by HSPICE. The process parameters adopt the UMC 0.5 process for education. In the fixed process, The result of power-delay-product improves to nearly 1/3 compared with CMOS logic-style in high process.
Cho, Hamm-Min, and 卓瀚民. "Mixing Pass-Transistor Logic with CMOS Logic for Low-Power Cell- Based Designs." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/83489899657484360995.
Full text國立中正大學
電機工程學系
86
Owing to the demand of the portable products small area and low- power are the main considerations in cell-based IC design. In this thesis we try to propose a methodology to combine pass- transistor logic and complementary CMOS logic to reduce power consumption. We first identify the types of logic functions suited for each individual logic style. Then we replace certain complementary CMOS cells in the cell library with pass- transistor cells. The modified cell library is used in conjunction with a logic restructuring algorithm to promote the use of pass-transistor logic in general combinational circuit. Empirical results using MCNC LGSynth'91 benchmark circuits show that an average of 13.48% power reduction can be attained through the use of the proposed method.
Tsai, Cheng-Hsuan, and 蔡政軒. "Design of Hybrid CMOS/Pass-Transistor-Logic Standard Cell Library." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/55551706681576129798.
Full text國立中山大學
資訊工程學系研究所
98
The mainstream of current VLSI design and logic synthesis is based on traditional CMOS logic circuits. However, various new logic circuit design styles based on pass-transistor logic (PTL) have been proposed. The advantage of PTL is higher speed, smaller area and lower power for some particular circuits such as XOR. Since most current automatic logic synthesis tools (such as Synopsys Design Compiler) are based on conventional CMOS standard cell library, the corresponding logic minimization for CMOS logic cannot be directly employed to generate efficient PTL circuits. In this thesis, we develop a novel PTL synthesizer that can efficiently generate PTL-based circuits. We proposed a new synthesis method (hybrid PTL/CMOS Library design) that has multiple driving strengths and multiple threshold voltages to achieve better performance in area, speed, and power. Since PTL-based circuits are constructed by only a few basic PTL cells, the layouts in PTL cells can be easily updated as the process technology migrates rapidly in current Nano technology era. The proposed PTL logic synthesis flow employs the popular Synopsys Design Compiler (DC) to perform logic translation and minimization based on the standard cell library composed of PTL and CMOS logic cells. Thus, the PTL design flow can be easily embedded in the standard cell-based ASIC design flow.
Chien, Hung-Chun, and 簡鴻駿. "A Full Adder Realized by Bootstrapped Pass Transistor Logic Structure." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33594552186358259766.
Full text南台科技大學
電子工程系
95
We use ALU broadly in VLSI such as Digital Signal Processor (DSP), Image Processor, and Microprocessor. Adder, subtractor, and multiplicer, which are included full adder, are the most common operation units in ALU. We can use software to do most calculation but not use hardware. The most basic circuit doing calculation in the computer is binary adder. For example, we can use of addition to do subtracting, continuous adding to do multiplication, and continuous subtracting to do division. Thus, adder is very important in the ALU and also can influence the performance of system. VLSI design has already entering into a portable SOC century, so low power consumption has become an important problem. We proposed three brand new full adders which is low power and realized in Bootstrapped Pass Transistor Logic. We also design a new XOR-XNOR, used in our full adder, which can generate full swing signal at the same time. We proposed 8 kinds of full adder and all of them are realized in 4 bit ripple carry adder. We also use Hspice to simulate the performance of the circuit and also tapeout our circuit in TSMC 0.35μm Mixed-Signal 2P4M Polycide 3.3/5V process. After comparing with other circuit, we can find that our circuit is low power and high speed.
Li, Yu-Cheng, and 李育晟. "Low Power Divider Design Using Pass Transistor Logic Circuit Scheme." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24911630754490373033.
Full text朝陽科技大學
資訊與通訊系
104
An increasing demand of communication mobile, the demand for larger data transmission and operation speed has grown significantly over time. It forces the system to process at a faster operation speed, and function more efficiently. However, it could translate into issues that involve higher power consumption and over-heating. As a result, suppressing and controlling the operation power at a higher operation frequency has become a crucial subject of study. Universal communication system involves high-speed dividers and it is primarily scheme in TSPC (True-Single-Phase-Clocking) and E-TSPC (Extend- True-Single-Phase). There are underlying flaws in these two scheme designs. TSPC scheme is not able to operate at high speed. On the other hand, E-TSPC scheme consumes higher power consumption at lower operation frequency due to DC power consumption problem. In this work, we proposed a low power divider design. This design adopts Pass Transistor Logic style (PTL) scheme, it effectively lowers the circuit complexity as well as power consumption of the design and achieves better power-delay-product (PDP) performance. We also presented a novel simulation method to measure the performances of the circuits more accurately. According to the results, in comparison with the traditional TSPC and E-TSPC, the proposed method is more suitable for lower power applications. Finally, the chip measured results did claims proposed design.
Yang, Yuling. "Design of high performance multiple-input pass-transistor-logic XOR circuits." Thesis, 2003. http://spectrum.library.concordia.ca/2129/1/MQ77726.pdf.
Full textLiu, Yi-Yu, and 劉一宇. "Low Power Driven Pass Transistor Logic Synthesis by Binary Decision Diagrams." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/11833238090918998559.
Full text國立清華大學
資訊工程學系
88
In this paper, we present methods to synthesize low power Pass Transistor Logic (PTL) cell. Given that the power consumption of a PTL cell includes power consumed at the gate terminal and source/drain capacitance when current flows from power/ground to output, we will translate finding a low power PTL cell to finding an OBDD with some defined cost function. This cost function includes the minimization of occurrence of variables with high transition probability and the minimization of the expected path length of an OBDD. To compute the cost function efficiently, three methods will be proposed to calculate the expected path length of Ordered Binary Decision Diagrams (OBDD).
Chen, Dai-Yen, and 陳達彥. "Logic/Circuit Synthesizer Based on Low-Complexity Pass-Transistor Cell Library." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/15156757388339666671.
Full text國立中山大學
資訊工程研究所
87
In this thesis, A pass-transistor-based cell library containing four types of cells is designed and the corresponding logic/circuit synthesizer is developed for logic mapping of any combinational and dynamic circuits. There are four driven capability selects for each type of cells. The format of input is Boolean functions with expressions of sum of product and we can input several functions for hardware sharing at the same time. It provides several optional modes such as high density、high performance、dynamic logic circuit, etc. . It also does optimization for both area and speed performance. The final, output is Verilog gate-level code and HSPICE netlist that provide Verilog-in for automatic place-and-route and simulation. Due to the small number of cells in library, it is easy to migrate to a new process technology.
Wen, Chia-Sheng, and 溫家聖. "Logic Synthesis of High-Performance Combinational Circuits Based on Pass-Transistor Cell Library." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/69965336703238055475.
Full text國立中山大學
資訊工程學系研究所
91
This thesis proposes a new variable-order prediction method to predict the Shannon expansion order during the BDD tree generator. Combining this method with the original minimum width method, we can generator a better BDD tree to be used in our pass-transistor logic synthesizer. Also we propose two partitioning methods to reduce the length of the critical paths. The first method can effectively reduce the critical path delay at the cost of much higher area cost. The second method explores the common factors in the Boolean functions to reduce the critical path delay with reasonably increased area cost. Furthermore, we discuss the methods of inserting regenerating inverters/buffers along the path in BDD tree by selecting inverter cells and MUX cells of proper driving strength to optimize the area/cost/power performance. Finally, the automatic layout generation is considered to produce the physical layout more efficiently compared with that using commericial automatic place-and-route tools.
Lu, Chih-hung, and 呂志宏. "A New Current-Sensing Complementary Pass-Transistor Logic for Low-Voltage Low-Power Applications." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/87368718272694349914.
Full text國立交通大學
電子研究所
83
In this thesis,we had developed a new circuit, it is called Current-Sensing Complementary Pass-Transistor Logic(CSCPTL). By applying the advantages of pass-transistor and the fast sensing characteristic in low voltage swing, the proposed new circuit has advantages on low-volateg low-power operation. As the portable personal computer and consu,er electronic system needs is getting critical, the new circuit has a fast operation speed under 1.2V supply voltage with compared to the complementary pass transistor logic(CPL), which is know to have the most potential in low-voltage low-power digital circuit design. The operational principles and fan-in characteristics are given and complex logic implementation capability and low-voltage driving ability are all given in this thesis. To be an example, the logic synthesis of the pass-transistor logic is also given in this thesis. To verify the circuit performance, an experimental chip fabricated by CIC, NSC in 0.8um SPDM CMOS process has been measured and the resulrs verifying the simulation results.
Liow, Yu-Yee, and 廖以義. "The Design of Low-Power Current-Sensing Complementary Pass- Transistor Logic and It's Application for Low-Voltage High-Speed Multiplier." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/49651992329882673659.
Full text淡江大學
電機工程學系
84
Recently, power dissipation is becoming an important constraint in portable e-lectronic systems. In this thesis, a new low-power current-sensing complement-ary pass-transistor logic (LCSCPTL) is proposed and analyzed. Since the curre-nt-sensing scheme can yield a faster sensing speed under small voltage swingthan the voltage-sensing scheme, the new logic circuit can be used in the low-voltage low-power digital system for high speed applications. It is shown thatthe LCSCPTL has an operation speed about 2.2 to 2.6 times faster than the CPL,which is known to have a great potential in low-voltage low-power digital app- lications. Moreover,the LCSCPTL has less power dissipation than the CPL. Thesefeatures make the LCSCPTL very promising in the applications of low-power low-voltage high-speed applications. The LCSCPTL can be operated at 1.2V withoutchanging the conventional 5V CMOS process. In order to verify the new circuitis practicable and exact.In this thesis,the LCSCPTL circuit is applied to imp-lement an 8bit x 8bit parallel multiplier. It uses the Baugh-Wooley algorithmto achieve 2's- complement multiplication. It's operation voltage is at 1.2V. The design of experimental chip is based upon the CMOS 0.8 um SPDM process of TSMC,which is provided by the Chip Implementation Center(CIC) of National Science Council (NSC). The chip design, simulation, layout, verification are included. The measurement results of the experimental chip of the LCSCPTL logic gates and the CPL logic gates are also shown. It consists with the simulation results.
Liao, Yi-Yi, and 廖以義. "The Design of Low-Power Current-Sensing Complementary Pass- Transistor Logic and It's Application for Low-Voltage High-Speed Multiplier." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/03087688244714051905.
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