A very high speed bandpass continous time sigma delta modulator for RF receiver front end a d conversion
A very high speed bandpass continous time sigma delta modulator for RF receiver front end a d conversion
... suggestions for future work Chapter Sigma Delta Modulator – An Overview In this chapter, the basic concepts involved in analog-to-digital conversion and in a Sigma- Delta modulator has an ADC are looked ... translation, channel filtering, and quadrature demodulation are done in DSP This ADC should have a high dynamic range, high linearity and large bandwidth at RF frequencies Since the sampling rate ... continuous -time bandpass fs/4 Sigma- Delta modulator is discussed followed by development and simulation of an ideal model in MATLAB Simulink Chapter explains the different non idealities such as loop delay,...
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Low pass sigma delta modulator for high temperature operation
... demand of high temperature circuits, this work presents a switched capacitor based high temperature low pass ΣΔ modulator Chapter introduces the fundamentals of A/D conversion and the operational ... of ΣΔ modulator Chapter studies the high temperature issues which may affect the circuit performance Some effective high temperature design techniques are introduced to minimize the high temperature ... Integrator Operation Principle 44 4.4.2 Non-ideality due to finite gain of amplifier 48 Chapter Design of High Temperature ΣΔ Modulator 49 5.1 Review of Previously Published High Temperature...
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bài giảng-vhdl - Very High speed integrated circuit Description Language
... Bài giảng Thiết Kế Hệ Thống Số Phần VHDL VHDL Very High speed integrated circuit Description Language I CẤU TRÚC CỦA MỘT THIẾT KẾ DÙNG NGÔN NGỮ VHDL Ghi - ... A - (A / B) *B Kết toán tử MOD biểu toán hạng thứ hai, xác định sau: A mod B = A - B * N Sau ví dụ sử dụng toán tử mod rem: mod kết = 3; (-7 ) rem kết = -3 ; mod (-4 ) kết = -1 ; (-7 ) mod (-4 ) ... std_logic_vector (N-1 DOWNTO 0); Reset, clock : IN std_logic; Q : OUT std_logic_vector (N-1 DOWNTO 0); END regn; ARCHITECTURE behavior OF regn IS BEGIN GV: Nguyễn Trọng Hải Trang 33 Bài giảng Thiết...
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Báo cáo hóa học: " Cosine-Modulated Multitone for Very-High-Speed Digital Subscriber Lines" potx
... Development for Digital Subscriber Lines Systems, Macmillan, Indianapolis, Ind, USA, 1998 L Lin and B Farhang-Boroujeny [4] T Starr, J M Cioffi, and P J Silverman, Understanding Digital Subscriber ... techniques for very high speed digital subscriber lines,” IEEE Communications Magazine, vol 38, no 5, pp 98–104, 2000 [23] G Cherubini, E Eleftheriou, and S Olcer, “Filtered multitone modulation for ... system performance and complexity Moreover, for a given pair of M and m, the system performance is affected by the choice of the CMFB prototype filter An important parameter that affects the performance...
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lecture about Very High Speed Integrated Circuit
... Verilog : VHDL , Verilog : VHDL: , Verilog - â 2007 - . VHDL? VHSIC (Very High Speed Integrated Circuit) Hardware Description Language 10 â 2007 - . VHDL 1980 - U.S Department ... (DOD) Funded a Project to Create a Standard Hardware Description Language Under the Very High Speed Integrated Circuit (VHSIC) Program 1987 - the Institute of Electrical and Electronics Engineers ... is time range fs to time 'high; impure function now return delay_length; subtype natural is integer range to integer 'high; subtype positive is integer range to integer 'high; type string is array...
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Bandpass electromechanical sigma delta modulator
... consideration is to place the center frequency Chapter Bandpass Sigma- Delta Modulators 15 Bandpass M Im z =1 Re Lowpass M Bandpass M Figure 2.12 Lowpass-to -bandpass transformation at frequencies which ... Chapter Bandpass Sigma- Delta Modulators 27 2.2 Review of Bandpass Ms Bandpass M is seen as a good candidate for IF digitization After the concept was proposed in 1989 [6], the first monolithic bandpass ... 1.1 Bandpass ADC for IF Digitization .3 1.2 Motivation and Scope .4 1.3 Organization of the Thesis Chapter Bandpass Sigma- Delta Modulators 2.1 Fundamentals of Sigma- Delta...
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Micromechanical resonator based bandpass sigma delta modulator
... micromechanical resonators in bandpass Σ∆ modulator design The design of a newly proposed 2nd-order bandpass Σ∆ modulator based on micromechanical resonator is presented The micromechanical resonator ... MICROMECHANICAL RESONATORS 28 RESONATOR MODEL 32 SENSING CIRCUITS 35 MICROMECHANICAL RESONATOR VERSUS LC AND GMC RESONATORS 36 CHAPTER BANDPASS SIGMA- DELTA MODULATOR BASED ON MICROMECHANICAL ... micromechanical resonator is a good candidate to replace LC and GmC resonators in continuous-time bandpass Σ∆ modulators 36 Chapter Bandpass Sigma- Delta Modulator Based on Micromechanical Resonator...
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Báo cáo hóa học: " Multistage Quadrature Sigma-Delta Modulators for Reconfigurable Multi-Band Analog-Digital Interface in Cognitive Radio Devices" pot
... al.: Multistage Quadrature Sigma-Delta Modulators for Reconfigurable Multi-Band Analog-Digital Interface in Cognitive Radio Devices EURASIP Journal on Wireless Communications and Networking 2011 ... discussed in more detail in Section In the following subsections, multi-band and multistage principles will be presented These are important concepts, considering reconfigurability in the A/D interface ... parameterization of multi-band transfer functions are given in Section 2.2 Multistage Quadrature ΣΔ ADC Multistage ΣΔ modulators have been introduced to improve resolution, e.g., in case of wideband information...
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Báo cáo hóa học: " Audio watermarking robust against D/A and A/D conversions" pptx
... Histogram-based audio watermarking against time-scale modification and cropping attacks IEEE Trans Multimedia 9(7):1357–11372 (2007) 20 S Xiang, HJ Kim, J Huang, Audio watermarking robust against time-scale ... IEEE Trans Speech Audio Process 11(4):381–386 (2003) doi:10.1109/TSA.2003.812145 doi:10.1186/1687-6180-2011-3 Cite this article as: Xiang: Audio watermarking robust against D/A and A/D conversions ... Data embedding in audio using time-scale modification IEEE Trans Speech Audio Process 13(3):432–440 (2005) 17 W Li, X Xue, Content based localized robust audio watermarking robust against time scale...
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Báo cáo hóa học: " Research Article Modified Polar Sigma-Delta Transmitter for Multiradio Applications" pptx
... V1.6.1 [14] M L S Penaloza, G Baudoin, and M Villegas, “Analysis of a modified polar sigma-delta transmitter architecture for multiradio applications,” in Proceedings of the 18th International Conference ... Architecture of a polar ΣΔ transmitter with RF recombination [6] ρ Digital ΣΔ φ(t) Digital DAC x(t) PLL φ (t) PA cos (wc t + φ (t)) Figure 3: Architecture of the modified polar ΣΔ transmitter From ... cos (φ) PLL sin φ + − PA Digital Figure 1: Architecture of a polar ΣΔ transmitter with baseband recombination Polar ΣΔ Architectures for Multi-Radio Applications ρ(t) = (zI (t))2 + zQ (t) ρ DAC...
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A STUDY ON SOLUBILIZATION OF EXCESS SLUDGE BY HIGH SPEED ROTARY DISK PROCESS
... the solubilization of excess sludge by high speed rotary disk process This method is a kind of physical treatment The excess sludge from final sedimentation tank in wastewater treatment plant was ... 813-818 Hasegawa, S., Miura, M., Katsura, K (1997) Solubilization of organic sewage by thermophilic bacteria Journal of Japan Sewage Works Association, Vol.34, No.408, 76-82 Imaoka, T., Hatano, K., ... inorganic materials such as sand; 6) type of surface materials of disk ACKNOWLEDGMENT The authors wish to thank Mr Hirofumi NAGATA for his great cooperation and the TAKAHASHI Foundation for providing...
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Tài liệu Báo cáo khoa học: "A HARDWARE ALGORITHM FOR HIGH SPEED MORPHEME EXTRACTION AND ITS IMPLEMENTATION" pptx
... section, can realize this strategy 3.1 A HARDWARE ALGORITHM FOR MORPHEME EXTRACTION FUNDAMENTAL ARCHITECTURE A new hardware algorithm for the morpheme extraction, which was designed with the strategy ... Search Method (Knuth,197S) CONCLUSION This paper proposes a new hardware algorithm for high speed morpheme extraction, and also describes its implementation on a specific machine This machine, MEX.I, ... character has M candidates, the worst case time complexity for sequential morpheme extraction algorithms is O(MN) On the other hand, the above proposed algorithm (Fukushima's algorithm) has the...
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Đề tài " Approximating a bandlimited function using very coarsely quantized data: A family of stable sigma-delta modulators of arbitrary order " pptx
... Annals of Mathematics, 158 (2003), 679–710 Approximating a bandlimited function using very coarsely quantized data: A family of stable sigma-delta modulators of arbitrary order By Ingrid Daubechies ... DEVORE , Approximating a bandlimited function using very coarsely quantized data: Improved error estimates in sigma-delta modulation, J Amer Math Soc., to appear ¨ ¨ C S Gunturk, J C Lagarias, and ... both cases, one can prove that there exists a bounded set Aa ⊂ R2 so that if |xn | ≤ a for all n, and (u0 , v0 ) ∈ Aa , then (un , ) ∈ Aa for all n ∈ N; see [19] APPROXIMATING A BANDLIMITED FUNCTION...
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Báo cáo khoa học: Thermosynechoccus elongatus DpsA binds Zn(II) at a unique three histidine-containing ferroxidase center and utilizes O2 as iron oxidant with very high efficiency, unlike the typical Dps proteins ppt
... elongatus DpsA Fig S2 Thermal denaturation of Dps- Te and DpsATe Fig S3 Iron oxidation kinetics of DpsA- Te as a function of temperature Fig S4 Sedimentation velocity of Dps- Te and DpsATe before and ... The unusual Thermosynechoccus elongatus DpsA F Alaleona et al UV and gamma irradiation, and acid and base shock [3] Furthermore, it was established that the DNAbinding capacity is shared ... in absorbance at 350 nm and analytical ultracentrifugation experiments indicated that all of the iron added was oxidized and incorporated Thus, the sedimentation coefficient, s20,w, of apoDpsA-Te...
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Báo cáo khoa học: "A High-Speed Large-Capacity Dictionary System" docx
... hence more dictionary entries, than would otherwise be necessary.) Every word token in a text is a vestigand at the time it is being looked up Simple System Let us begin considering the dictionary ... in terms of the simplest type of organization, in which the machine dictionary is set up very much like an ordinary printed dictionary, except that stems themselves are used as headings, rather ... Now, for a dictionary of adequate size, the exposition list itself is much too large to be in core storage at one time; it may comprise about 70 to 90 per cent of the volume of the dictionary...
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