getting into pcb layout

... First, in this era of monitors with ever larger resolution, the icons on our screens have been getting ever smaller and harder to see Second, Apple thinks its Mac OS X icons look really cool...

Ngày tải lên: 17/10/2013, 18:15

... Google Catalogs search results Understanding Froogle’s Index and Search Results Getting into Froogle resembles getting into Google’s Web index Two methods are at your disposal: ߜ Let Froogle find ... crawler (The setting turns Yahoo! Store product information into something similar to a Froogle data feed, which I describe Chapter 14: Getting into Froogle and Google Catalogs in the next section.) ... product type, Chapter 14: Getting into Froogle and Google Catalogs name, description, price, and a photograph if there is one Then Froogle ranks the page, places the product into a category of the...

Ngày tải lên: 24/10/2013, 08:20

... interaction First things first New sites must get into Google and then work to raise their profiles Getting into Google really means getting into the Google index, which is a database of Web ... before getting into the site Google does not like pointing its searchers to splash pages In fact, these tedious welcome mats are bad site design by any standard, even if you Chapter 2: Getting into ... depths, and formulas by Chapter 2: Getting into Google which the company chooses crawl targets To a large extent, targets are determined by automatic processes built into the spider’s programming,...

Ngày tải lên: 24/10/2013, 08:20

... Princeton, you will almost definitely get into Yale Law School If you score 9.2 on the MCAT and graduate with a 3.4 in music, you will almost definitely not get into Johns Hopkins Medical School On ... have a 710 is reasonably meaningless and shows you to be focused on the wrong things Of course, getting a 720 after previously scoring a 670 may greatly help your candidacy While most schools ... could be a major liability The AWA score is not important for most applicants, and is not factored into the overall GMAT score anyway In some cases, the actual text of the AWA section might be compared...

Ngày tải lên: 23/03/2014, 17:21

... evaluating the impact of media strategies for research at country and international levels 13 Getting into the Kitchen: Media strategies for research Introduction Local television crew in Comoros ... South African researcher, the media can help research become linked to policy processes by getting you into the kitchen, being part of the soup-making”.1 This paper explores the roles the media ... Director, University of Western Cape Programme for Land and Agrarian Studies, December 2004 Getting into the Kitchen: Media strategies for research Linking research, policy and publics Villagers...

Ngày tải lên: 24/03/2014, 02:20

Ngày tải lên: 06/05/2014, 09:16

... PCB Layout Software There are many PCB Layout software packages available For this tutorial, I will be using Protel DXP Protel DXP 2004 Orcad Layout Eagle Layout Editor Express PCB PADS ... Notice when you highlight a part, Protel shows both the schematic layout (top right) and the PCB layout (bottom right) Schematic Layout- Placing Parts PIC18F452-E/P : 40 pin DIP package, DIP’s ... Libraries (Cont.) From the Library folder, go to the PCB folder, this folder contains PCB footprint libraries Adding Libraries (Cont.) From the PCB folder, add Chip Capacitor Chip Resistor Crystal...

Ngày tải lên: 12/07/2014, 02:21

... and PCB Layout Guidelines for QFN Packages Appendix I: Detailed PCB Layout Figure 12 shows the PCB top layer of a suggested board layout of soldered pads for QFN packages This suggested board layout ... Soldered Pads for QFN Package (PCB top layer) 11 Assembly and PCB Layout Guidelines for QFN Packages Figure 13 shows the PCB lower layer of the suggested board layout ØTH LW1 ØVL LW2 LV LV LW1 ... Packages, Reduced Thermal Pad (PCB top layer) 12 Assembly and PCB Layout Guidelines for QFN Packages Figure 15 shows the PCB lower layer of the suggested board layout with reduced thermal pad...

Ngày tải lên: 08/08/2014, 12:22

... meters d in mm PCB Trace Resistance inch 1.3µV 10µA • inch (7 mil) trace of 1/2 oz copper with 10μA of current => voltage drop of 1.3μV • LSBs (298nV) at 24 bits! PCB Inductance PCB: Inductance ... 0.5mm This wire has 105nH of inductance H H PCB Capacitance • Two Cu plates with PCB material dielectric • Two 10 mil traces on a multi layer PCB, 10 mil between layers A = 0.25 mm x 0.25 mm ... 10 mil = 0.25 mm PCB Vias Component: Vias Purpose: Interconnect traces on different layers Problem: Inductance and Capacitance 0.4mm (0.0157”) via with 1.6mm (0.063”) thick PCB has ≈ 1.2nH 1.6mm...

Ngày tải lên: 08/08/2014, 13:20

... Conducted Emissions Coupling Medium: Radiated Emissions Radiated Noise: Long Traces • Trace going into 10-bit or 12-bit ADC input is longer than a few inches Emitted Noise Analog receptors: electromagnetic ... Low-speed: offset shift, RF noise High-speed: linear and non-linear amplification Converters EMI aliased into passband offset shift Regulators offset shift in output voltage a Loop – the path current follows...

Ngày tải lên: 08/08/2014, 13:20

... long loops PCB Capacitance : E-Field PCB Trace C = w • L • eo • e r pF d d L dV I = C amps dt w= L= d= eo = er = w (typ 0.003mm) PCB Cross-Section thickness of PCB trace length of PCB trace distance ... trace distance between the two PCB traces dielectric constant of air = 8.85 X 10-12 F/m dielectric constant of substrate coating relative to air PCB Capacitive Coupling PCB Trace Voltage IN d L dV ... coupling Signals are in phase PCB Coupling Noise Reduction w • L • eo • e r • Decrease “L” or Increase “d” d • Put Ground Guard Between Traces Guard Trace C = pF PCB Trace Voltage IN d L dV I...

Ngày tải lên: 08/08/2014, 13:20

... in return path • Will have a change in impedance with this configuration 2-Layer PCB showing Current Density of PCB trace and Single Return Path Via Controlled Impedance Vias • • • Better Solution ... Current Density Area Flow at vias Improved impedance – reduces reflections 2-Layer PCB showing Current Density of PCB trace and Multiple Return Path Vias Split Grounds Split Ground Connected Under...

Ngày tải lên: 08/08/2014, 13:20

... (pH, etc) • Come from layout as well as contamination of the board or IC packaging Guard Rings-Circuit Guard Rings - PCB OPA129 Summary • Optimize the Signal Chain at the PCB • Take steps to minimize: ... Ground Plane overlap No Split ADS1232REF Layout: Top Digital Analog Power ADS1232REF Layout: Bottom 48 Enemy #4: Thermal Instability • Component placement • Parasitic ... SBAA052, http://focus.ti.com/lit/an/sbaa052/sbaa052.pdf • Ott, H W., "Partitioning and Layout of a Mixed-Signal PCB" , Printed Circuit Design, June 2001, pp 8-11 : http://www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf...

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 14/08/2014, 21:21

... present the finished product, he might just (gasp!) change his mind Getting the red out digitally When a subject looks directly into the camera and the camera-mounted flash fires, the result is ... (much like protecting the rest of the image with masking tape) In this chapter, you read about getting ready to make changes to your image rather than actually making those changes You can isolate ... adjustments to working with Photoshop’s creative filters to simply copying them so you can paste them into another image I discuss “taping the glass” first by making selections and then by using masks...

Ngày tải lên: 27/08/2012, 14:35

... Illustrator and drag the picture clipping into the file Getting Paths from Photoshop into Illustrator You can only copy paths from Photoshop and paste them into Illustrator, raster objects not work ... Getting Photoshop Images Into Illustrator Method Advantages Disadvantages Using Adobe® Photoshop® 4.0 & Adobe® ... Photoshop files into a separate Illustrator file The paths will have no paint value and will have crop marks indicating the bounding box of the Photoshop file Paths copied and pasted into Illustrator...

Ngày tải lên: 21/12/2013, 20:15

... the article's publication Painting with print: Incorporating concepts of typographic and layout design into the text of legal writing documents Ruth Anne Robbins∗ I Introduction 109 A Persuasion ... Note: Because the topic of this article is how typography and layout affect the reception of written text, the article’s typography and layout conform with the author’s suggestions rather than adhering ... the argument to begin with the macro concepts before moving into the micro issues This article varies that approach for good reason All layout maxims derive from the legibility studies, and thus,...

Ngày tải lên: 21/02/2014, 05:20

... some p a r t i c u l a r r e s t r i c t i o n s for its nondeterministic behaviour, t h a t put into effect syntaxbased d y n a m i c disambiguation 1) the SEXP arc allows for a t r a n s i t ... lexicon ( t h e r e is nothing particularly i n t e r e s t i n g in t h a t , so we s h a l l not go into detail here); b) flexible idioms; these idioms a r e C o m p a r i n g to t h e c r i t e r ... lnterlisp-D and runs on a Xerox 1186 The idiom recognition ability was e a s i l y i n t e g r a t e d into t h e s y s t e m The performance is very satisfying, in particular with regard to the flexibility...

Ngày tải lên: 08/03/2014, 18:20

... it as a MNL file for Layout Start Layout and select a PCB technology template (.TCH file) Save the Layout project as a MAX project file Use Layout to import the MNL netlist into the MAX file Make ... Function of OrCAD Layout in the PCB Design Process .11 Design Files Created by Layout 14 Layout format files (.MAX) 14 Postprocess (Gerber) files .14 PCB assembly layers ... need to when you are working in Layout Designing the PCB with Layout Starting Layout and importing the netlist Now you will use the netlist to route a board using Layout Begin by clicking the Windows...

Ngày tải lên: 07/04/2014, 22:14

... i U X How to look real Before designing, check out the party! Here’s how to transform a dull layout into an energetic expression of the real event Before The Kentucky Mine Summer Concert Series ... project no energy, no musicality and no sense of place That’s because the designer was thinking layout and missed the event Here’s how to get all of that good stuff in KENTUCKY MINE AMPHITHEATER ... line regains its weight Dates and times are stacked tightly in a more readable typeface and shoved into the open space, resulting in a massive block SUMMER CONCERT SERIES SUMMER CONCERT every friday,...

Ngày tải lên: 01/03/2016, 22:19