目前国产高频宽带扫频仪的对数放大器性能还有待提高。
The properties of domestic high-frequency broadband sweeper, for instance, the dynamic range, logarithmic accuracy, flatness and log linear, still need to be improved.
仪器采用吸光光度法测量原理，在测量方法上避免了模拟对数放大与运算；
With the measurement principle of spectrophotometry, the analyzer calculates absorbency by software . avoiding the mathematical formulas of logarithmic ratio amplifiers.
介绍了大动态连续检波式对数放大器(SDLA)的设计方法、工作原理和结构。
A successive detection logarithmic amplifier (SDLA) is described, with regard to its operational principle and structure.
在液闪计数装置中采用这种对数放大器实现了对一些放射性核素活度的绝对测量。
Using this amplifier in a liquid scintillation counting device, absolute measurements of the activity of some radionuclides have been realized.
详细叙述了对数放大器的性能、特性，介绍了几种主要的对数放大器类型及其工作原理。
Major types of the log amplifier and their theory of operation are discussed. The development of log amplifiers abroad is examined.
设计了两种用于生化分析仪器的对数放大电路，通过实验得出了对数放大电路的数学表达式。
Two kinds of logarithmic ratio amplifiers used for biochemical analyzers were designed and the mathematical formulas of the amplifiers were derived through experiments.
该视频对数放大器是在自制单片ic基础上混合集成，单片IC采用PN结隔离双极工艺制作。
This video log amplifier is based on a monolithic IC, which is fabricated using PN junction isolation bipolar process by SISC, and all peripheral devices are integrated using hybrid IC process.
结合对数放大器自身的特性，介绍了此电路在BPM系统中的组成，工作原理，试验结果和参数的测量方法。
According to log amplifier's characters, we introduce the structure, principal, experiment results and measurement of the parameters of the circuit in BPM.
在比较器和受控放大器之间接上一个对数放大器，就可以使增益控制特性为指数函数的AGC系统严格线性化。
It is also demonstrated that the AGC systems with exponential gain control characteristic may strictly be transformed into a linear system by using any logarithmic amplifier.
介绍了对数放大器的基本概念以及利用AD 8313对数放大器集成芯片研制的实用宽带、大动态范围、高精度对数放大器模块。
This paper introduces a basic conception of logarithm amplifier and a useful logarithmic amplifier using the chip of AD8313 that has a wide bandwidth, high dynamic range and high accuracy.
其他的一些改善这个问题的工作包括在传统胶卷上使用超灵敏的化学感光物质，或者对数码相机的光电传感器捕捉到的信号进行放大。
Workarounds include the use of extra-sensitive chemicals in traditional films, or amplification of signals captured by the photoelectronic light sensors of digital cameras.
介绍基于PSPICE电路分析程序的自动优化设计系统及其在对数视频放大器设计中的应用和实验结果。
The automatic optimal design system is based on the circuit analysis software-PSPICE. In application, a video log amplifier is designed and the results are presented.
一种适用于ask接收器中的双极型对数中频放大器，具有接收信号强度指示的功能(RSSI)。
A bipolar logarithmic intermediate-frequency (if) amplifier with received signal strength indicator (RSSI) circuit for ASK Receiver is presented.
用迭代法对数字图像经过插值放大后产生的模糊问题进行了研究。
We study the problem of blurring of digital images after interpolation and enlargement by using the iteration method.
本文介绍一种快对数电荷放大器。
论文的第四章给出CARM放大器数值模拟模型，对数值模拟过程中的参量计算，程序流程图做了详细的论述；
The forth chapter introduces the Numerical simulation model of coaxial-waveguide CARM amplifier, gives out parameters computation, and procession flow charts.
给出了快对数电荷放大器动态测量范围的测量方法以及采用这种对数电荷放大器的液闪计数装置对放射性溶液活度绝对测量的测量结果。
A method for measuring the dynamic range of the fast logarithmic charge amplifier is described. Finally, the results of absolute measurement of the activity of...
给出了快对数电荷放大器动态测量范围的测量方法以及采用这种对数电荷放大器的液闪计数装置对放射性溶液活度绝对测量的测量结果。
A method for measuring the dynamic range of the fast logarithmic charge amplifier is described. Finally, the results of absolute measurement of the activity of...
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