pdf viewer in c# code project : How to paste picture on pdf control software system azure winforms web page console slyp1710-part1290

High Speed Analog Design and Application Seminar
3-1
Texas Instruments
Section 3
Useful Things to Know about
High-Speed A/D Converters
How to paste picture on pdf - copy, paste, cut PDF images in C#.net, ASP.NET, MVC, Ajax, WinForms, WPF
Detailed tutorial for copying, pasting, and cutting image in PDF page using C# class code
how to copy pictures from a pdf file; how to copy a picture from a pdf
How to paste picture on pdf - VB.NET PDF copy, paste image library: copy, paste, cut PDF images in vb.net, ASP.NET, MVC, Ajax, WinForms, WPF
VB.NET Tutorial for How to Cut or Copy an Image from One Page and Paste to Another
copy picture from pdf reader; how to copy a pdf image into a word document
High Speed Analog Design and Application Seminar
3-2
Texas Instruments
Agenda
ɿ
Understanding the ADC Input
ɿ
Working with the ADC Input
ɿ
ADC References
ɿ
Clock Considerations
ɿ
ADC’s Digital Data Outputs
Appendix:
• HS-ADC Testing
- Bench Test Setup and Equipment
• 
Pipeline Architecture, Basic Overview
Today’s High-Speed A/D converter feature a wide dynamic range at very high
sampling rates. In order to preserve and utilize this wide dynamic range, careful
attention must be given to the details of applying the A/D converter. The designer
will find a lot of useful application information and circuit suggestions in the
product data sheets. While the datasheets focus on model specific information,
however, it typically does not go into the details that would help particularly the
inexperienced designer to gain a fundamental understanding of high-speed A/D
converter. This section of  the seminar is designed to review some of the relevant
fundamentals in and around High-Speed Pipeline ADCs.
C# PDF insert image Library: insert images into PDF in C#.net, ASP
How to Insert & Add Image, Picture or Logo on PDF Page Using C#.NET. Import graphic picture, digital photo, signature and logo into PDF document.
cut and paste image from pdf; how to copy an image from a pdf file
VB.NET PDF insert image library: insert images into PDF in vb.net
project. Import graphic picture, digital photo, signature and logo into PDF document. Add images to any selected PDF page in VB.NET.
copy image from pdf preview; how to copy picture from pdf file
High Speed Analog Design and Application Seminar
3-3
Texas Instruments
High-Speed A/D Converter
ɿ
Sampling rate, Fs >10Msps
ɿ
Almost always ‘Pipeline’ ADCs
ɿ
Monolithic CMOS Devices
ɿ
Single-Supply (analog, digital)
ɿ
Integrated S&H -> ADS
ɿ
Internal Reference
ɿ
Low-Voltage, Single-Ended Logic Outputs
(LVCMOS, typ. +3.3V, +1.8V)
ɿ
Emphasis on Dynamic Performance
The term ‘High-Speed’ can be found in combination with a lot of different product
lines. For this presentation it is used for A/D converter with a sampling or clock
rate of more than 10Msps. Such converter are in most cases based on the
‘pipeline’ architecture (see Appendix for more details on the principals of Pipeline
ADCs), and fabricated using a sub-micron CMOS process. Some converter
model designed for very-low power consumption operate on only 1.8V supplies, a
result of a 0.18um process used. Most such ADCs are single-supply components,
which poses certain restrictions on their operating conditions, a topic that will be
looked at throughout this presentation. Based on switched capacitor techniques,
High-Speed ADCs typically have a build-in Sample&Hold circuit, as well as
internal references. The use of external reference is in most cases an available
option. The supplies of the converter is usually such that it provides a dedicated
output driver supply pin. This allows the digital outputs to be interfaced to a
variety of logic families. Most High-Speed A/D converter are designed to achieve
a certain, high level of dynamic performance, i.e. in terms of SFDR and SNR. It
should be noted that in order to meet those ac-performances dc accuracy is
typically compromised. For example, gain and offset error are often in the percent
range.
C# PDF remove image library: remove, delete images from PDF in C#.
Support removing vector image, graphic picture, digital photo, scanned remove a specific image from PDF document page. Able to cut and paste image into another
how to copy pictures from pdf in; paste picture to pdf
VB.NET PDF remove image library: remove, delete images from PDF in
C#.NET PDF pages extract, copy, paste, C#.NET Support removing vector image, graphic picture, digital photo, scanned or all image objects from PDF document in
copy and paste image from pdf to pdf; how to cut an image out of a pdf
High Speed Analog Design and Application Seminar
3-4
Texas Instruments
Understanding the ADC Input
C# HTML5 Viewer: Deployment on ASP.NET MVC
Open Global asax.cs, you can find the functions shown below. Creating a Home folder under Views according to config in picture above. RasterEdge.XDoc.PDF.dll.
copy paste picture pdf; how to cut a picture out of a pdf
C# HTML5 Viewer: Deployment on IIS
Copy according dll files listed below under RasterEdge.DocImagSDK/Bin directory and paste to Xdoc.HTML5 RasterEdge.XDoc.PDF.HTML5Editor.dll. (see picture).
copy image from pdf to word; how to copy pdf image to jpg
High Speed Analog Design and Application Seminar
3-5
Texas Instruments
Understanding the ADC Input
What’s the nature of the inputs?
ɿ
Differential Inputs
ɿ
Looking into a S&H
ɿ
Switched Cap Inputs
ɿ
Dynamic Input Impedance
ɿ
Effectively ‘Capacitive’ Load
What are the ac and dc constraints?
ɿ
Full-Scale Input Range (FSR in Vp-p)
ɿ
DC-Input Common-mode Voltage (V
CM
)
ɿ
Analog Input Bandwidth
IN
IN
ADC
+Vs
Typically, a particular high-speed ADC model is selected based on its sampling speed and
dynamic performance at certain frequencies or over a bandwidth of interest. For the system
designer this selection process is not always easy. Often the system requirements are unique
and the relevant information can not directly be extracted from the product datasheet
Extrapolating the achievable performance bears some risk and to minimize the possible error
sources the designer must pay careful attention to the issue of the ‘interface’. The
considerations on the interface include an understanding of the input of the ADC – what effect
it will have on the driving source and it’s constraints.
The signal inputs to the ADC are typically differential, which has a number of advantages, and
will be discussed throughout the presentations. What the driving source sees is the input stage
Sample&Hold amplifier, who’s architecture employs switched capacitors. Here, switches are
typically connected directly to the input pins and switching transients occur as a function of the
clock. Consequently, the input impedance is neither constant nor just resistive, but dynamic
and highly capacitive in nature.
The full-scale input range of the ADC is usually determined by the internal references. Note
that there will be a significant difference in the required signal amplitude between differential
and single-ended input configurations; typically a factor of two. In either case, most high-speed
ADCs require their inputs to be biased up to a defined common-mode voltage. It is usually
around half the supply voltage, and can be adjusted within a range without too much trade-off
in performance.
One other consideration that comes into play particularly for undersampling or IF-sampling
applications is the ‘Analog Input Bandwidth’ of the ADC.
C# Raster - Modify Image Palette in C#.NET
& pages edit, C#.NET PDF pages extract, copy, paste, C#.NET VB.NET How-to, VB.NET PDF, VB.NET Word, VB is used to reduce the size of the picture, especially in
paste picture into pdf; cut and paste pdf image
C# Word - Document Processing in C#.NET
Open(docFilePath); //Get the main ducument IDocument doc = document.GetDocument(); //Document clone IDocument doc0 = doc.Clone(); //Get all picture in document
how to copy an image from a pdf in; how to cut pdf image
High Speed Analog Design and Application Seminar
3-6
Texas Instruments
Interfacing the input signal differentially to the high-speed ADCs is usually the
recommended configuration as it leads to the highest achievable dynamic
performance. Most ADCs are specified based on the differential input configuration.
Compared to single-ended, differential inputs require two signals that are
180degrees out of phase, but each of the two signal requires only half the signal
amplitude. This is essential as it typically translates into reduced distortion from the
driving source. Differential signaling also leads to a significant reduction in even-
order harmonics. This is desirable since the second harmonic is often dominant and
higher order harmonics can be filtered more easily. Furthermore, common-mode
noise can be greatly suppressed.
Most high-speed ADCs designed for 3V to 5V power supplies operate with a full-
scale input range of about 2Vp-p. This typically represents a good compromise
between the achievable signal-to-noise ratio (SNR), and the distortion performance
(THD, SFDR). Depending on the application, optimizations towards one or the other
can be made, but will also affect the requirements for the driver circuit.
ADC – Differential Input
Differential/Complementary Inputs
ɿ
Two Input Signals, Complementary
ɿ
½ Signal Swing compared to SE
ɿ
Reduces Even-Order Harmonics, compared to SE
ɿ
Improves Common-Mode Noise Rejection
ɿ
Full-Scale Input Range:
• Typically 2Vp-p span for best Distortion and Noise
trade-off
• Can include Rail-to-Rail Operation
Directly Affects Requirements for Driver Circuit
High Speed Analog Design and Application Seminar
3-7
Texas Instruments
Single-ended vs. Differential Signals
GND
V
Diff 
(p-p)
Vp+
V
CM
Vp-
IN
IN
A/D
2. Driving Differential Inputs Differentially 
+Vs
GND
More headroom
V
Diff 
(p-p)
IN
IN
1. Driving Differential Inputs Single-Ended
A/D
V
SE 
(p-p)
+Vs
Little headroom
V
CM
This slide shows the difference in required input signal amplitude between the
single-ended input configuration and the differential input configuration. It also
shows very clearly that for a given supply rail (+Vs) the differential signaling
approach leaves significantly more headroom – the distance between the peak
signal amplitude and the supply rail. Typically, as the signal amplitude
approaches the supply rail distortion from the driving source, as well as the ADC,
increases.
High Speed Analog Design and Application Seminar
3-8
Texas Instruments
Single-ended vs. Differential
Interface Tradeoffs
ɿ
Single-ended Inputs
ɷ Degraded dynamic performance (larger FSR)
ɷ Common-mode voltage and op amp headroom may
limit use for dc-coupling
ɷ May be best suited for Time Domain application
ɿ
Differential
ɷ Optimized performance due to lower FSR, Reduction
of even-order and common-mode components
ɷ Best for higher input frequencies (IFs)
ɷ More complex driver circuitry
This slide summarizes the key points between a single-ended and differential interface.
Even though the single-ended configuration has a number of draw backs it is still a viable
option for time domain based applications. For example, for a CCD imaging system the
emphasis is clearly on maximizing the signal-to-noise ratio and the increase in distortion
that may result can be accepted. A related point is whether or not the system requires dc-
or ac-coupling. Here, dc-coupling often places additional constraints on the interface
circuit implementation.
For almost all high-speed A/D converter it can be said that in most applications, using the
differential input configuration along with ac-coupling results in the best obtainable ADC
performance.
Some general observations:
The distortion and SFDR performance typically improves with smaller signal amplitudes.
The SNR performance typically improves with larger signal amplitudes.
The distortion and SFDR performance typically degrades as the input frequency increases.
The SNR typically degrades as well with higher input frequencies. This is often primarily
due to jitter having a higher impact. See the discussion on clock and jitter later in this
presentation.
High Speed Analog Design and Application Seminar
3-9
Texas Instruments
As mentioned before, one of the constraints that needs to be considered when
designing with high-speed ADCs is the input common-mode voltage requirement.
The internal reference of the A/D converter often includes a pin for the common-
mode voltage. This V
cm
pin can be used to provide the input biasing to the ADC. For
example, the V
cm
pin may be tied directly to the center tap of a transformer. In any
case, the V
cm
pin requires local high-frequency bypassing to shunt any clock feed
through to ground.
ADC – Input Common-Mode
Common-Mode Voltage Requirement
ɿ
Most A/D Converter use a Single-Supply
ɿ
Nominally at V
cm
= V
s
/2
ɿ
Requires the Analog Inputs to be Biased for
Optimum Performance
ɿ
Possible to adjust V
cm
within a certain Range while
maintaining acceptable Performance
ɿ
Requires Attention in DC-coupled Applications
• Matching V
cm
Levels between Driver and ADC
• Driver Headroom Issue
27
High Speed Analog Design and Application Seminar
3-10
Texas Instruments
AC Performance vs Common-Mode Voltage
Example of an ADC’s AC Performance over a range of
Input Common-Mode Voltage
50.0
60.0
70.0
80.0
90.0
0.25
0.75
1.25
1.75
2.25
Common Mode (V)
 (dB FS)
SFDR
SNR
Documents you may be interested
Documents you may be interested