A while ago a friend said they had a project in which there was a process circuit for ESD protection. I couldn't understand it at the time. But then the more I see the more I understand. Now share with you. is also a contribution to high-tech. The right of the regulator diode plays the role of the control voltage, when the regulator diode conduction, will be in its high over a current, the current through the resistance below, will cause the voltage o
Bav99/ESD Interference or discharge damage circuit/interface Protection Circuit
Bav99 is designed for the purpose of ESD. It is afraid that the signal line is vulnerable to ESD Interference or discharge damage the circuit. Because these interfaces are interconnected with each other, it is afraid that the received signal has large static electricity.
When several
1, first open Photoshop software, a new larger layer, this is the new 1920x1200 pixel layer:
2, then create a new layer 1, choose the default black and white color, click the "filter" → "rendering" → "Clouds, cloud effect is not satisfactory words can be more than a few times:
3, click "Filter" → "pixel" → "Mosaic", set unit 50, click OK.
4, click "Filter" → "fuzzy" → "radial blur", the number 15, scaling, the best quality:
5, click "Fil
Welcome to the Bestcoder-every Saturday night (with rice!) )Euler circuitTime limit:2000/1000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 10544 Accepted Submission (s): 3845Problem description is a loop that does not leave the pen on the paper, but only once per side of the picture, and can return to the starting point. Now given a diagram, ask if there is a Euler circuit?The input test inputs contain several test ca
test once, unexpectedly started, and also passed the self-test into the desktop. After repeated tests found that, as long as the connection to the power supply, the computer can not start.
Fault analysis: The author suspected that the auxiliary power supply circuit of the video card has short circuit. But there is no multimeter on hand and no second graphics card, in order to verify this inference, the au
Http://www.elecfans.com/dianzichangshi/200805269451.htmlHigh-impedance state: is neither higher nor low, if the high impedance state and then input the next level of the circuit, no impact on the lower circuit, and not the same, if using a multimeter is likely to be high level also may be low level, with the things that follow it fixed.Tri-State output gate Circuit
Written in front of the knowledge:Boolean cast:Except for Nan, null, "", Undefined, 0, function, which are false, the others are true;About conversion, and so I'll write another one, dedicated to string, int, and Boolean conversions.symbols for short-circuit operations: | | ! or with non-the principle of short-circuit operation: when there are more than one expression, the value of the expression on the rig
usually + 5 V; VSS is grounded, Which is 0 V. HighIt is regarded as the logic "1", and the range of the level value is 65% ~ of VDD ~ VDD (or VDD-1.5V ~ VDD) Low LevelIt is regarded as "0" and must not exceed 35% or 0 ~ of the VDD ~ 1.5 V. + 1.5v ~ + 3.5v should be regarded as an uncertain level. Avoid uncertain levels in hardware design. In recent years, with the development of sub-micron technology, the power supply of single chip microcomputer is declining. Low Power Supply voltage
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=1878" Concept "Euler circuit: If there is such a path in Figure g, so that it passes through each edge of the G once, it is said that the path is a Eulerian path . If the path is a circle, it is called a Euler (Euler) loop .The topic is an no-show diagram:the necessary and sufficient conditions for the existence of the Euler circuit in the non-graphAn un
Bitwise AND short circuit and difference:
Both bitwise AND logical operators, both sides can be Int or boolean expressions. When both sides are int, the number on both sides of the operator must be converted to the binary number before calculation. The short circuit and () must be a Boolean expression. Example:
What is the value of 12 5? A: 12 is converted to 1100 (the first four digits are omitted)
15199 km of the cargo carrier circuit and 15199 of the cargo carrier circuit in Cities in China
15199 km of the cargo carrier circuit in 34 Chinese cities
Find the longitude and latitude of 34 Chinese cities on the internet, calculate the sphere distance between cities, create a nearby connected graph, and use the touch hole Backtracking Method to Calculate the
The difference between logic short-circuit in Java is that logic needs to judge the two conditions on the left and right of the symbol, and the short-circuit If the symbol is true on the left, it will be judged right; if The symbol left is false, then go else.eg. Public classDemo { Public Static voidmain (String [] args) {intA = 4; intb = 3; intc = 0; if(A//ErrorSystem.out.println ("Nihaoma"); }Else
Euler circuitFrom one point onwards, the edges of the graph pass through once, then back to the starting point, so that the path is the Euler loop.It's a Euro-pull loop.Euler Loop DeterminationBut what kind of diagram is there in the euro-pull circuit?Euler loops are divided into both the graph and the non-graphic two types:
The direction graph: a little in the figure is equal to the degree of the degree
No map: The number of degrees in a
Http://zhidao.baidu.com/link?url=DW5c3ozc4FLxbEMuaYWWTKXYZFvMQP9Jj2MCggqO0ifgK9sRWZL42azUPjMGwvWNDIg2ZUis4ueUCJrspgC79qThe potential of a point is related to the reference point, and the voltage (the potential difference of two points is independent of the reference point), at a point where the voltage of the 2 point is determined, the potential of one spot is raised and the potential of the other point is raised automatically. This is like standing on the shoulders of giants is a truth.The feat
I. Reverse Amplifier
A reversed-phase amplifier circuit built with a 741 chip:
Relationship between output voltage and input voltage:
Output Waveform and Input Waveform:
Ii. Voltage follower
The same phase amplifier built using 741:
Relationship between output voltage and input voltage:
Output Waveform and Input Waveform: (the Input Waveform is vertically translated)
3. Same phase amplifier
The following voltage follower is built with 741:
Relati
I-V (current-voltage) converter with V-I (voltage current) converter 1, basic I-V Converter
Relationship between output voltage and input current:
Key points:
L r represents the conversion sensitivity here. High sensitivity requires a large resistance, while a large resistance is generally less accurate.
L r can make the impedance in a more general sense, also with capacitance, Inductance
L used in photoelectric Detectors2, high sensitivity I-V Converter
High sensitivity I-V converter
%========================================================% Shortest path matrix algorithm, Floyd algorithm% targeted: Program budget, can find out the shortest possible between the short (minimum cost, etc.)%========================================================function D=zuiduanjulijuzhen (quanzhijuzhen)N=length (Quanzhijuzhen);D=quanzhijuzhen;M=1;While MFor I=1:nFor J=1:nIf D (i,j) >d (i,m) +d (M,J)D (i,j) =d (i,m) +d (M,J);EndEndEndm=m+1;EndD%================================================
is a bit long.AC Code: ProgramZht;varN,M,I,P,MAX,TN,X,Y,S:LONGINT;D,BH:Array[0.. -] ofLongint;a:Array[0.. -] ofLONGINT;MAP1,MAP2:Array[0.. -,0.. -] ofLongint;procedureDFS1 (x:longint);varI:longint;begin fori:=1 toN Do ifMap1[x,i]>0 Then beginDec (map1[x,i]); Dec (map1[i,x]); DFS1 (i) ;End; Inc (TN); A[TN]:=x;End;procedureDFS2 (x:longint);varI:longint;begin fori:=1 toN Do ifMap2[x,i]>0 Then beginDec (map2[x,i]); Dec (map2[i,x]); DFS2 (i) ;End; Inc (TN); A[TN]:=x;End;procedureChuli1;varK:long
, after learning these, you look at the high-speed signal theory (in fact, in the electromagnetic compatibility),Introductory book: There are foreign textbooks, with foreign, feel that they make up the book more close to the actual projectThe practice of getting started: It's best to have basic instrumentation, basic devices, breadboard--or simulationSoftware Multisim (highly recommended) or PSpiceThen more internet, go to the forum, or some study site, of course, if you can search foreign or do
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