cga hole in one

point is very important, design must consider the 3. Line-to-outline line spacing 0.508mm Two. via vias (commonly known as conductive holes) 1. minimum aperture: 0.3mm (12mil) 2. Minimum Vias (VIA) aperture not Less than 0.3mm (12mil), the pad can not be less than 6mil (0.153mm), preferably greater than 8mil (0.2mm) Large is not limited (see Figure 3) This point is very important, design must consider 3. Vias (VIA) hole-to-

NAT is called symmetricNAT, the latter called Cone.Nat. We expect that our NAT is the second, hehe, if your NAT happens to be the first one, then there is likely to be a lot of peer software failure. (Fortunately, the vast majority of Nat now belongs to the latter, namely coneNAT) Well, we see that with NAT, it's easy to connect a computer to a subnet (NAT is equivalent to Transparent, Subnets and extranet computers do not need to know the NAT situation. However, it is difficult for an exter

99se, pads/dxp and Gerber ). 1) It should be noted that the high-edition Board, such as dxo2004, or a later version should not be converted to the 99se version, resulting in less copper skin. 2) (important) if you use dxp2004, ad6.9, and Ad series design software, convert it into a gerber file and submit it to us, otherwise, the Board may be useless because of an error in the isolation ring caused by version compatibility! The design of the inner layer with the main panel is not affected. Multi

cross and must bypass the independent path), only early circuits use such boards. Double-sided boards)Both sides of the circuit board are wired. However, to use the wires on both sides, you must have a proper circuit connection between the two sides. The bridge between these circuits is called a guide hole (). The guide hole is a small hole on the PCB that is

, the need to maintain the thickness of the plate in 0.6, 0.7mm or more, while the top point, basic in 1mm or more. Because the plate is thin, not only make the plate more easily deformed, but also more easily with the internal hardware resonance, causing more noise. 　　The line space. For now, the back line design has become almost standard design (only a few manufacturers are still adhering to the traditional ...), many entry-level products are also configured on the back line desig

Implementation characteristics of binary stack Structural:The heap is a fully binary tree: a completely filled tree with elements from left to right filled in from the lower level Sequence of the heapThe minimum of the minimum heap is on the root, and each child heap also satisfies the parent node is not greater than the child node Basic heap Operations Insert (insertion) Add a hole in the next available location

combination of two single laminates, each of which has electronic components and cables. Sometimes you need to connect one side of the single line to the other side of the board, this is through the guide hole (). The guide hole is a small hole on the PCB that is filled with or coated with metal. It can be connected to both sides of the wire. Currently, many com

three major technical elements of electronic products, SMT process is an important link in the process technology. In SMT process, the rationality of PCB design is more concerned about the SMT manufacturers, but also the key factors affecting product quality. Some designers do not pay much attention to product manufacturability, that as long as the circuit design no problem can be, so the design of the product can not only poor manufacturing, but also need to continue to change the process, res

current.IR Receiver Head CGA (controllable gain amplification circuit)Provides the main gain of the entire module (50-80db), can accept instructions to change the gain, is controlled by AGC (automatic gain control).BF (band-pass filter)According to the frequency domain characteristic of the signal to eliminate the jamming means, can eliminate the interference signal from various interference sources;The width of the pass band is 4KHz;The optimal valu

the main menu. You can also use the user option to manually set hard disk parameters. You must enter cyls, heads, precomp, landz, sectorxs ), mode and other parameters. The hard disk size is automatically generated after the above parameter settings. (2) available display types: accept/VGA (selected for the metric, VGA, Sega, sv ga, and PGA display adapter) and CGA 40 (CGA display card, 40 columns), cga80

use the user option to manually set hard disk parameters. You must enter cyls, heads, precomp, landz, sectorxs ), mode and other parameters. The hard disk size is automatically generated after the above parameter settings. (2) available display types: accept/VGA (selected for the metric, VGA, Sega, sv ga, and PGA display adapter) and CGA 40 (CGA display card, 40 columns), cga80 (

system has a table that records which memory is available and which memory is occupied. At first, all memory is available to the user process, so it can be used as a large chunk of available memory, called a hole (hole), when the new process needs memory, to find a hole large enough for the process, and if found, can allocate the required memory from the

} Calculation (AB) f1+: Set X (0) =ab Calculates x (1): Scans the function dependencies in the F1, finds the function dependencies of the left part AB or AB, because such a function dependency cannot be found. So there is x (1) =x (0) =ab, and the algorithm terminates. (AB) f1+= AB does not contain C, so ab→c is not a redundant function dependency and cannot be removed from the F1. b Set Cg→b as redundant function dependencies, then remove Cg→b, get: F2={ab→c,d→e,d→g,c→a,be→c,bc→d,cg→d,acd→b,ce→

level '; 1 PGA Summary 2 SGA Summary 4 UGA Summary 8 Current Call (CGA) Summary User Call (CGA) Summary Large Call (LGA) Summary 1025 PGA Content 2050 SGA Content 4100 UGA Content 8200 Current Call content 16400 User Call Content 32800 Large Call Content 7). Sub Heap Prior to Oracle version 9.0.1 ALTER session SET EVENTS ' immediate trace name heapdump_addr level n '; If n is a subheap address, dumps the

The adapter mode is to convert an interface of a class to another interface that the customer wants, so that those classes that cannot work together due to incompatibility of the interface can work together. I don't know if you have used the adapter mode in daily coding, but the working mode of the adapter is very common in our life. This article uses the oldest but most representative example to explain. Now there is an electrical appliance worth 1000 yuan working under a 3-

Original Title: problems encountered in powerpcb Reprinted from: http://www.emsym.com/blog/ Emsym angxin Technology 1. Questions about the virtual outer frame of the passing hole: As shown in: The outer frame refers to the gap between the via and other devices. The size can be set in design rule. The size of the isolation ring between the copper skin and the hole is the distance between t

after the communication between the parties.5. The same type of cartridge components should be placed in the X or Y direction in one Direction. The same type of polar discrete components also strive to be consistent in the X or Y direction for easy production and inspection.6. Heating elements should be generally distributed evenly, in order to facilitate the cooling of the single board and the whole machine, in addition to temperature sensing components outside the temperature-sensitive device

Dip pad Making:1. Launch pad Designer.2.New a pad, take a name. Round through hole rectangular pad4_0r2_3cir1_5md, round through Hole square PAD4_0SQ2_4MD, round through hole round PAD5_0CIR3_0MD, circular through hole finger-shaped p2o4x1_4cirmd, finger-shaped through hole

Hot-bar reflow (molten Siena heat welding), the most common function is to use the heat of the melt has been printed on the electronic printing circuit (PCB) on the Siena paste, in order to connect two separate parts of the electronic components, the most commonly seen is the software line (FPB) welding on the electronic printing circuit (PCB).Since the heat of the Hot-bar is the only source of heat, when the heat pressure is in the soft line (FPC) , it is necessary to transmit heat downward to

not receive, the NAT type of a is port-restricted type.Tips:a after the message will start listening to the port, and set the time-out period, to prevent infinite blocking, but also each time the detection of more than one UDP packet.Four, Penetration MethodPenetrating there 4 method of:(1) Direct communication(2) piercing through (hole punching)(3) Reverse traversal (reverse)(4) Port prediction (ports prediction)For illustrative purposes, we assume