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 [...

Ngày tải lên: 11/09/2015, 14:38

... 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 fre...

Ngày tải lên: 26/09/2015, 10:51

... 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...

Ngày tải lên: 26/11/2015, 12:15

... 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...

Ngày tải lên: 05/03/2014, 23:20

... 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...

Ngày tải lên: 20/06/2014, 22:20

... 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 mi...

Ngày tải lên: 12/10/2015, 17:36

... 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...

Ngày tải lên: 21/06/2014, 11:20

... noise in each of the inputs, then the power spectral density (PSD) of each input would be QT (·): Ternary quantizer 1-bit Multi-bit Figure 1: The structure of a first-order ternary sigma-delta modulator ... paper, ternary arithmetic processing modules are proposed, and an attempt is made to provide a measure of the accuracy of these systems This is done by determining the...

Ngày tải lên: 21/06/2014, 22:20

... (ICASSP ’01), vol 4, pp 2621–2624, Salt Lake City, Utah, USA, May 2001 [6] M A Aldajani and A H Sayed, “Stability and performance analysis of an adaptive sigma-delta modulator,” IEEE Transactions ... Processing, vol 2007, Article ID 16286, pages, 2007 [8] G S Tombras and C A Karybakas, “New adaptation algorithm for a two-digit adaptive delta modulation system, ” Internati...

Ngày tải lên: 22/06/2014, 19:20

... San Francisco, Calif, USA, February 2002 J Koh, K Muhammad, B Staszewski, G Gomez, and B Horoun, A sigma-delta ADC with a built -in anti-aliasing filter for Bluetooth receiver in 13 0nm digital ... ADC helps distributing the AGC function between the ADC and the intermediate frequency SIGMA-DELTA ADC DESIGN FIR antialiasing filter and decimation The diagram...

Ngày tải lên: 22/06/2014, 22:20

... that by using the full-rate demodulator, approximately an SNR gain of 15 dB could be obtained FPGA IMPLEMENTATION OF KALMAN LOWPASS FILTER To get insight into hardware implementation of Kalman ... pk is the output of the modulator in Figure 1(b), and qk is obtained by integrating pk Taking the quantization noise variance σ = 1/12, and using the initial conditions shown...

Ngày tải lên: 22/06/2014, 23:20

... Motorola Digital Signal Processors Principles of Sigma- Delta Modulation for Analog- toDigital Converters by Sangil Park, Ph D Strategic Applications Digital Signal Processor Operation MOTOROLA ... Block Diagram of Signa -Delta Modulation The name Sigma- Delta modulator comes from putting the integrator (sigma) in front of the delta modulator Sometimes, the Σ−∆ modul...

Ngày tải lên: 04/07/2014, 07:24

... việc chuyển đổi số tới antenna [3] 1.2 Các bớc để đo sai số tần số Tính khả thi thích nghi làm cho kiến trúc có tính hiệu quả, phơng pháp để đo truyền sai số tần số điều chế số đơn kênh cho hệ ... điều chế ADC deltasigma để đo lỗi tần số truyền điều chế số đơn kênh, phơng pháp đợc đánh giá cao coi công cụ cho ngành thiết bị...

Ngày tải lên: 08/05/2015, 16:03

... nhau, kỹ thu t âm số, truyền hình số Cấu tạo ADC Sigma - Delta Bộ điều chế ΣΔ Bộ lọc số Bộ giảm tốc (Decimation) ADC ΣΔ ADC Sigma - Delta Hình 1: Sơ đồ khối ADC Sigma - Delta ADC Sigma - Delta Hình ... Contents Giới thiệu ADC Sigma - Delta ADC Sigma - Delta Ưu nhược điểm Kết luận Giới thiệu ADC Sigma - Delta Đây...

Ngày tải lên: 24/07/2015, 22:26

... are introduced and followed by the basic background knowledge about the class D power amplifier 2.1 Background of Audio Power Amplifier Audio power amplifier is an electronic device that produces ... the power amplifier and the specifications of building blocks are determined A single-stage 4th-order fully feedforward Sigma- Delta modulator is adopted to modulate th...

Ngày tải lên: 16/10/2015, 15:38