And in the design of analogue parts, programmable gain amplifying and programmable filtering are applied. Programmable amplifying improves some drawbacks, which are produced by traditional hand switch to adjust gain.
并且在模拟部分设计中，采用了程控放大和程控抗混滤波技术，从而改善了传统电荷放大器运用手动切换进行增益调节所存在的不可克服的缺点，并且能够根据所输入的频率参数变化程控的选择相应的截止频率，更好的滤除高频干扰。
参考来源 - 低频振动下机械故障诊断技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
采用程控放大器对音量进行宽范围控制，提供了具体硬件电路并指出了软件构成方法。
A way of controlling the voice volume in a wide range with program-control amplifier, the hardware circuit and constructing method of software are given.
各单元电路设计时，从整个测量系统误差的角度分析设计低噪音前置放大器、程控放大器、线性精密检波器等单元电路。
For every circuit unit, mainly analyzing and designing the low-noise preamplifier, rule control amplifier and linearity precision detector unit circuit and so on.
系统以DSP为控制核心，可自动识别并适应不同的电压和电流等级，采用程控放大、变化采样频率以获得优化的阵列测试效果。
The tester with DSP core could get excellent results by judging and adopting the different value of voltage and current, programmed amplifying and changing the frequency of sample.
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