analogue to digital converter

... reference levels is the focus of this paper In order to obtain samples efficiently, the levels need to be appropriately assigned in the analog -to- digital converter (ADC) When they are not within the amplitude ... comparator associated with that level changes its output, then its corresponding digital trigger identifies the change and sends the information to the digital circuitry that controls the comparator’s ... Two methods of tracking input to implement DSA (a) All comparators are turned on once every μ seconds, and the approximated input xmμ is send to the digital circuit to evaluate DSA (b) A low-rate...

Ngày tải lên: 22/06/2014, 01:20

... the digital modulation sequences, as in (36), is preferable from a noise perspective CONCLUSION In this paper, a new general formulation of analog -to- digital converters using parallel ΣΔ-modulators ... analog to digital converter, ” in Proceedings of the IEEE Vehicular Technology Conference, vol 4, September 2002 [18] A Blad, H Johansson, and P L¨ wenborg, “A general formulao tion of analog -to- digital ... signal input -to- output relation of the system is analyzed Conditions for the system to be free from nonlinear distortion (i.e., free from aliasing) are stated In Section 3, the sensitivity to channel...

Ngày tải lên: 22/06/2014, 19:20

... detail s MOTOROLA 1-3 SECTION Conventional Analog -to- Digital Converters “Most A/D converters can be classified into two groups according to the sampling rate criteria: Nyquist rate converters ... 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 ... Nyquist A/D converters requires a flat response with no phase distortion over the frequency band of interest (e.g., 20 kHz in digital audio applications) To prevent signal distortion due to aliasing,...

Ngày tải lên: 04/07/2014, 07:24

... literal into W linker to select SFR bank set PORTB data latches to set PORTD data latches to set PORTE data latches to move literal into W set PORTA data latches to move literal into W set PORTC ... adc_temph ; ; ; ; ; move adc_result LSB into W save W into temp register move adc_result MSB into W save W into temp register return from subroutine ; ; ; ; linker to select GPR bank initialize table ... into W linker to select SFR bank set baud rate for 9600 @ 4MHz move literal into W ; Delay for ~ 150mS Delay_150mS movlw banksel movwf outer movlw movwf inner decf btfss goto decf btfss goto...

Ngày tải lên: 11/01/2016, 11:34

... correlated noise, i.e distortion created by the converter itself With delta-sigma analog -to- digital converters, there is a subset of this distortion referred to as idle tones These idle tones are a by-product ... ModulatorCH0(OFF); ON, OFF Modulator output setting for CH0 ModulatorCH1(OFF); ON, OFF Modulator output setting for CH1 WidthCH1(24); Note 1: An 8-bit wide unsigned integer is passed to SetOSR ... delta-sigma modulator These tones limit the performance of the spurious free dynamic range of the device, increase the harmonic distortion, and overall reduce the signal-tonoise and distortion level...

Ngày tải lên: 11/01/2016, 16:55

... Referring to Figure 9, VREF source impedence ≈ R However, smaller R increases current consumption Since VREF is used to charge capacitor arrays inside the A/D converter and the holding capacitor, ... hold type A/D converters, the analog input has a switch (typically a FET switch in CMOS) which is opened for a short duration to capture the analog input voltage onto an on-chip capacitor Conversion ... is the time required to charge the on-chip holding capacitor to the same value as is on the analog input pin The sampling time depends on the magnitude of the holding capacitor and the source impedance...

Ngày tải lên: 11/01/2016, 11:50

... The author, publisher, and distributors disclaim all liability and responsibility to any person or entity with respect to any loss or damage caused, or alleged to be caused, directly or indirectly, ... in personal injury or damage to property The material in this book is intended solely as a teaching aid, and is not represented to be an appropriate or safe solution to any particular problem For ... Be sure to visit the book’s website at: www.DSPguide.com The Scientist and Engineer's Guide to Digital Signal Processing Second Edition by Steven W...

Ngày tải lên: 13/09/2012, 10:21

... 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 filters can be stored on ... generated by sampling it A typical example of a digital lowpass filter is shown in Figure 1.15 The output of the digital filter is next fed to a digital -to- analog converter (DAC) as shown in Figure 1.17 ... 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 briefly discussed earlier in this...

Ngày tải lên: 13/09/2012, 10:21

... in digital audio processing Human voice is converted to a digital signal, modified, processed, and converted back to an analog signal for people to hear The process to convert digital signals to ... implementation ANALOG -TO- DIGITAL CONVERSION 3.3.2 Integration The integration technique uses an integrator, a comparator, and a controller to convert analog signals to digital signals A sampled ... from −5VDC to + VDC The input to the ADC ranges from to VDC The box with constant K maps the output range of the input transducer to the input range of the converter Naturally, we need to multiply...

Ngày tải lên: 29/09/2013, 20:20

... 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 filters can be stored on ... generated by sampling it A typical example of a digital lowpass filter is shown in Figure 1.15 The output of the digital filter is next fed to a digital -to- analog converter (DAC) as shown in Figure 1.17 ... 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 briefly discussed earlier in this...

Ngày tải lên: 29/09/2013, 21:20

... Dashboard Factory Factory Exchange 2000 Server Exchange 2000 Server Digital Digital Dashboard Dashboard Factory Factory Digital Dashboard Store (Contains Web Parts) Digital Dashboard Store (Contains ... dashboard logic tier Digital Digital Dashboard Dashboard Factory Factory SQL Server 7.0 SQL Server 7.0 Digital Digital Dashboard Dashboard Factory Factory Digital Dashboard Store (Contains Web ... Protocol (HTTP) and WebDAV protocols 21 22 Module 1: Introduction to Digital Dashboards Introduction to the Digital Dashboard Storage Tier Slide Objective To present the digital dashboard storage...

Ngày tải lên: 19/10/2013, 02:15

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Ngày tải lên: 29/10/2013, 09:46

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Ngày tải lên: 21/01/2014, 00:20

... applied to an analog -to- digital converter (A/D) circuit where the sampled analog signal is converted to a digitally coded signal The digital signal is then applied to c 1999 by CRC Press LLC the digital ... Press LLC 5.4 Analog -to- Digital Converter Architectures The analog -to- digital (A/D) converter, also known as an ADC, encodes an analog signal into a digital word Conventional converters work by ... variations of process parameters 5.3 Digital -to- Analog Converter Architecture The digital -to- analog (D/A) converter, also known as a DAC, decodes a digital word into a discrete analog level Depending...

Ngày tải lên: 27/01/2014, 03:20

... start/end to match the content that it is joined to within the script This stops the system having to re-sync to the new frame rate/resolution and saves you having to douse the projector to cover ... film information kept automatically up to date and film synopses and show times clearly displayed to customers, allowing them to book online The website also allows customers to become members and ... challenge to even squeeze the CP2000 projector into, and as you can see from the picture top right, there is no space to gain access to the equipment rack where the Server would normally be located To...

Ngày tải lên: 19/02/2014, 10:20

... digital Brief Encounter and had hit the problem of having to get an additional 35mm print for Penguins, so as to be able to move it to another screen The need to move a print to another auditorium ... Projector Any projector that uses digital technology to create the image Performance levels vary from table top designs for offices, large ‘rental and staging’ projectors, right through to digital ... Arts Alliance are to be applauded and encouraged to continue to roll out the digital net work as quickly as possible in order to make the UK a digital nation As though on cue to acknowledge the...

Ngày tải lên: 19/02/2014, 10:20

... with Topics 1-50 (title field), AP8889 with Topics 101-150 (title field) and WSJ9092 with Topics 201-250 (description field) All the collections are stemmed, and stop words are removed, prior to retrieval ... them automatically from predicate-argument structures and a dependency parse We will use this space to perform query expansion in IR, a task that aims to find additional words related to original ... by a row vector and a column vector that capture the information before and after the word, respectively In some applications, direction sensitivity is ignored to obtain a single vector representation...

Ngày tải lên: 20/02/2014, 04:20

... Feature Get to know Corel Painter X Create an Auto-Painting Set Corel Painter X up to the hard work The Auto-Painting option is a handy tool to get to know because it allows you to test out effects ... slider to something high like 80% Hit the Play button and watch as brushstrokes are applied to the photo Bring detail back to your images by using the Restoration tools incredible feature automatically ... many ways to sign the painting We’re going to use the Text tool and use a font to sign the painting Go to Window>Show Layers Add a layer and go to the toolbox and click the ‘T’ icon At the top of...

Ngày tải lên: 27/02/2014, 15:48