1) pre-amplify
前置级放大
1.
The pulse is collected by photoelectric-sensor,and it is converted into pulse voltage signal through the signal processing circuits of pre-amplifying,LPF,integral comparator and so on,then the pulse voltage signal inputs the single chip microcomputer which can calculate heart-rate and display.
利用光电传感器采集人体脉搏信号,经过前置级放大、滤波、积分比较等信号处理电路,将其转换成脉冲电压信号,再利用单片机对脉冲信号进行处理计算出心率并显示。
2) preamplifier stage
前置放大级
3) head amplifier
前置放大器，前级放大器
4) driver
[英]['draɪvə(r)] [美]['draɪvɚ]
末级前置放大器
5) Pre-amplification
前级放大
1.
Pre-amplification technology is adopted to expand the dynamic range of sampled data, thus improving the system dynamic range.
在给出多阶模拟AGC动态范围极值及影响因素基础上,提出了一种扩大系统动态范围的方法:引入前级放大技术以扩大采样数据动态范围,进而提高系统动态范围。
2.
Pre-amplification technology is adopted to expand the dynamic range of sampled data,thus improving the system dynamic range.
针对采样模块,引入前级放大技术扩大采样数据动态范围,进而提高系统整体动态范围;针对模拟AGC参考电平调整困难及差分比较运算的不足,引入数字电平比对技术,实现输出增益动态可调。
6) preamplifier
[英][pri:'æmplə,faiə] [美][pri'æmplə,faɪɚ]
前置放大
1.
In order to improve the sensitivity measurement of the trace gas concentration, proposed one kind of advanced design of photo-electricity detection of preamplifier circuit applied to this monitoring system, that is, the programmable gain preamplifier circuit of photo-electricity detection.
基于可调谐二极管激光吸收光谱(TDLAS)的痕量气体监测系统,为提高痕量气体浓度的高灵敏度测量,提出应用于此监测系统中的光电检测前置放大电路的一种改进设计,即程控增益光电检测前置放大电路。
2.
The keystones and difficulties during the design and realization of NMR preamplifier for Oil Well Logging System were analyzed.
根据微弱信号检测技术和电路低噪声设计基本原理,结合核磁信号本身信号强度微弱、噪声干扰严重等特性,以及核磁共振测井仪工作环境的特殊性,着重分析了在核磁共振测井仪前置放大器研制过程中其关键电路研制的重点和难点,并给出了相应的电路原理图。
3.
In this paper, problems and related technical measures about structure of acquisition system, preamplifier, power and earthing, which must be considered in designing foreside of high-speed data acquisition system, are discussed.
研究了关于高速数据采集系统前端设计时需考虑的结构、前置放大器、电源和接地等问题及其相应的技术措施,从而为设计高性能的高速数据采集系统提供参考。
补充资料：前置放大器
分子式：
CAS号：
性质：在核辐射探测装置中介于探测器和主放大器之间的单元。主要作用是收集来自探测器的微弱脉冲电流信号。有电压灵敏前置放大器和电荷灵敏前置放大器两类。
CAS号：
性质：在核辐射探测装置中介于探测器和主放大器之间的单元。主要作用是收集来自探测器的微弱脉冲电流信号。有电压灵敏前置放大器和电荷灵敏前置放大器两类。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条