介绍了集中式数字燃油测量系统的总体结构，分析了前端单元的功能及其设计原则。

This paper briefly introduces the structure of the centralized fuel measurement system, analyzes the functions and principles of design of the front-unit, and accomplishes the detailed design.

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正交偶极子阵列声波测井仪中前端信号采集和处理单元大量使用了VCVS有源滤波器。

VCVS active filters are greatly used in front signal acquisition and processing unit of the Cross Multipole Array Acousticlog tool.

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前端设备：一种把一些通信线路与计算机系统联接起来的传输控制单元。

Front-end device: a transmission control unit that links a number of communication lines to a computer system.

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