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NDS356AP Suppliers

EMC measurement and classification purposes

In Electronic Infomation Category: E | on November 24,2011

Electromagnetic compatibility measurement is to identify the source of interference, interference channels and NDS356AP datasheet and the degree of interference, the use of shielding, filtering, grounding and NDS356AP price and other measures to suppress electromagnetic interference, coupling to eliminate or reduce interference, enhance immunity sensitive circuits. a wide range of electromagnetic interference, electromagnetic interference with a different spectrum and NDS356AP suppliers and different routes of transmission, the suppression of different measures should be taken. In a large number of components within the system are in a small space, the distance between the wires between the components and the close, the electromagnetic field generated by the coupling can be seen as near-field. Line characteristics change with frequency, the frequency ...

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FORK () function to understand

In Electronic Infomation Category: F | on December 12,2010

Of: Wang Shanshan, China Qingyuan see embedded Lecturer. just contact for Unix / Linux operating system, Linux, people who write multi-process, fork is one of the most difficult concept to understand: it once it returns two values. First we look at the next fork function prototype: # i nclude # i nclude ; pid_t fork (void); return value: negative: If the error, then fork () returns -1, this time not to create a new process. The initial process is still running. zero: the child process, fork () returns 0 positive: in the negative process, fork () returns the child process is PID Secondly, we look at how to create a child process using fork. boilerplate code to create the child process is as follows: pid_t child; if ((child = fork ()) / * error handling * / e...

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