单片机防酒后驾驶控制系统相关英文及翻译.doc

英文原文
Data Converters
The current upsurge in the use of digital processing techniques ,brought about by developments in very large scale integration, has forced the role of the interface elements between analog and digital systems to the forefront of attention. Data converters are these interface elements. Although they were once regarded by electronics engineers as expensive, rather specialized pieces of equipment , they are now monplace . They are available as self-contained functional units, in both modular and low cost integrated circuit from . No one with an interest in modern electronic instrumentation techniques can afford tube without a sound knowledge and understanding of the operation, capabilities and limitations of these devices.
USEFULNESS OF CONVERTERS
In many of the real world systems studied by scientists and engineers the system parameters are continuously changing quantities (analog variables)and when electronic measurement techniques are used data is derived in analog form as the electrical output signal of a transducer .It is perfectly possible to process ,manipulate and store analog data using a purely analog electronic system : negative feedback techniques can make analog systems perform very precisely. [1]However , the accuracy of a purely analog system is often not usable because of the difficulty of rending , recording and interpreting anal