本文针对增益为20～ 23倍的可编程阶码放大器AD5 2 6集成片，摆脱传统的设计方法，提出一种反馈式程控放大电路。
This paper introduces a special amplifying circuit which can vary the gain from 2 0 to 2 3 in allusion to AD526 chip, throwing out of the traditional method.
并以宽带电流反馈运算放大器为核心，辅以FET输入电路及程控电路构建了高速高输入阻抗可变增益放大电路。
Combined with wide band current feedback amplifier, FET input circuit and programmable circuit, variable gain amplification circuit with high speed and high input impedance is designed.
介绍了程控增益放大器三种电路实现方式，以及这几类电路在电声系统中的应用。
Three kinds of programmable gain amplifier circuit are introduced in this article. Their applications to electro-acoustic system are introduced, too.
设计了一个测量放大器电路，它由差动放大电路、共模抑制电路、双端单端转换电路和程控增益放大电路组成。
A measurement amplifier circuit is designed, which consists of circuits of differential amplifier, a common-mode rejection, double-end and single-end conversions and programmed gain amplifier.
用DAC芯片程控信号调理电路的放大倍数，提高了系统的测量范围。
By changing the amplification multiple through DAC signals, the measurement range of the system is improved.
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.
在电荷转换部分的灵敏电容的切换和输出放大级的增益切换电路的实现上提出了程控的方案；
Has proposed a programme-controlled scheme in the sensitivity throw-over of charge convert and gain throw-over of output amplifier;
程控放大器能够把这样的信号变换成与测量或控制电路相匹配的输入电压。
Programmed amplifier is able to convert these signals into input voltage which match with testing circuits.
程控放大器能够把这样的信号变换成与测量或控制电路相匹配的输入电压。
Programmed amplifier is able to convert these signals into input voltage which match with testing circuits.
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