analog data to digital signal conversion ppt

... removed with a digital low-pass filter. After conversion to an analog signal through a DAC, a simple RC network is all that is required to produce the final voice signal. Multirate data conversion ... method for digital -to -analog conversion is to pull the samples from memory and convert them into an impulse train. This is The Scientist and Engineer's Guide to Digital Signal Processing60 pass ... the analog signal contains frequencies greater than one-half the sampling rate, that is, we have proven the sampling theorem. Digital -to -Analog Conversion In theory, the simplest method for digital -to- analog...

Ngày tải lên: 31/03/2014, 22:20

... 35 The Sampling Theorem 39 Digital -to -Analog Conversion 44 Analog Filters for Data Conversion 48 Selecting the Antialias Filter 55 Multirate Data Conversion 58 Single Bit Data Conversion 60 Chapter ... Continuous Signal Processing 243 DIGITAL FILTERS Chapter 14. Introduction to Digital Filters 261 Chapter 15. Moving Average Filters 277 Chapter 16. Windowed-Sinc Filters 285 Chapter 17. Custom Filters ... this book. If you do not wish to be bound by the above, you may return this book to the publisher for a full refund. The Scientist and Engineer's Guide to Digital Signal Processing Second Edition by Steven...

Ngày tải lên: 13/09/2012, 10:21

... can be considered a bandlimited signal. It is this signal that is sampled and converted to a discrete-time signal and coded to a digital signal by the analog- to- digital converter (ADC) that was ... sinusoidal signal, which is a continuous-time signal, and a discrete-time signal. We dis- cussed the basic procedure followed to sample and quantize an analog signal ANALOG AND DIGITAL SIGNAL PROCESSING 25 different ... ability to compress the data by a significant factor and receive the input signal at lower cost and very good quality. To point out the power of digital signal processing theory and the digital signal...

Ngày tải lên: 13/09/2012, 10:21

... ability to compress the data by a significant factor and receive the input signal at lower cost and very good quality. To point out the power of digital signal processing theory and the digital signal ... manufacture of analog filters, we may have to tune each of them to correct for manufacturing tolerances, but there is no such need to test the accuracy of the wordlength in digital filters. Data on digital ... the phone to the BTS in the next cell, which may offer a stronger signal. If no such cell is nearby, the caller is cut off (i.e., will not be able to receive or to send ANALOG AND DIGITAL SIGNAL...

Ngày tải lên: 29/09/2013, 21:20

... processes to produce other processes. The intentional operation on a signal produced by one process, an “input signal, ” to produce a new signal, an “output signal, ” is generally referred to as signal ... a digital link, noise in the digital link can cause errors in reconstructed bits, the bits can then be used to reconstruct the original signal within some fidelity. All of these operations on signals ... are virtually buried in noise added to them on route and in the front end amplifiers of the powerful receivers used to retrieve the signals. By suitably preparing the signals prior to transmission, by suitable filtering...

Ngày tải lên: 16/01/2014, 16:33

... REAL-TIME DIGITAL SIGNAL PROCESSING 1 Introduction to Real-Time Digital Signal Processing Signals can be divided into three categories ± continuous-time (analog) signals, discrete-time signals, and digital ... the signal is zero except at the sampling instants t  nT. In order to represent an analog signal xt by a discrete-time signal xnT accurately, two conditions must be met: 1. The analog signal, ... `discrete-time' and `digital& apos; inter- changeably. Digital signal processing (DSP) is concerned with the digital representation of signals and the use of digital hardware to analyze, modify,...

Ngày tải lên: 18/01/2014, 20:20

... programming data. Prior to the actual programming operation, the write data must be loaded into the panel write latches. The data to be programmed into the panel is loaded in sequential order into the ... instructions store either a trun- cated (SAC) or rounded (SAC.R) version of the contents of the target accumulator to data memory via the X bus (subject to data saturation, see Section 2.4.2.4 Data Space ... & Table Data Access Control Block Stack Control Logic Loop Control Logic Data LatchData Latch Y Data (1 Kbyte) RAM X Data (1 Kbyte) RAM Address Latch Address Latch Control Signals to Various...

Ngày tải lên: 06/03/2014, 22:20

... (referred to hereafter as an information coefficient) comparing either the logically combined vectors or individual vec- tors A or B with vector C, conditioned on the infor- mation available in vector ... suc- cessfully to other types of genomic data? We analyzed logical relationships within microarray expression data, with attention to identifying logical combinations of proteins that led directly to the ... has previously been shown to be under-expressed in amelo- blastoma tumors while CDK5R2 has been implicated in mediating apoptosis in human glioblastoma multi- form cells. Together these observations...

Ngày tải lên: 07/03/2014, 21:20

... filers is intended to permit companies to plan and implement their data tagging with the benefit of the experience of year one filers. It also is intended to enable us to monitor implementation ... information to companies and investors, and that mandated interactive data use would provide the incentives to drive sufficient investment in software to enable widespread adoption of interactive data. 100 ... data to cause them to reflect the same information. 226 2. Use of Technology to Detect Errors Complete, accurate, and reliable financial statements and other disclosures are essential to...

Ngày tải lên: 29/03/2014, 18:20

Ngày tải lên: 28/06/2014, 06:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

Ngày tải lên: 03/07/2014, 14:20

... to an analog signal for people to hear. The process to convert digital signals to analog signals is completed by a DAC. The most commonly used technique to convert digital signals to analog signals ... into FIGURE 3.4: Quantization. ANALOG- TO- DIGITAL CONVERSION 55 3.3.2 Integration The integration technique uses an integrator, a comparator, and a controller to convert analog signals to digital ... microcontroller MSB LSB Comparators 2.5 v 1/2 1/4 1/8 1/2 n Adder Quantized Analog Signal Scalar Multipliers FIGURE 3.11: A summation method to convert a digital signal into a quantized analog signal. Comparators are...

Ngày tải lên: 29/09/2013, 20:20