...程控放大器(Programmable Gain Amplifier,PGA)是指可以通过程序或指令控制而改变其增益等性能的放大器,PGA的基本形式是由运算放大器和模拟开关控制的电阻网络组成。
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A programmable gain amplifier is built using the low-power operational amplifier and potentiometer to adapt large amplitude variation of vortex signal. A special power supply module is designed to provide enough current for the meter with two-wires.
采用数字频谱分析与模拟带通滤波器组相结合的方式,既最大程度地滤除信号中混杂的噪声,提高测量精度,又保证低功耗工作;采用低功耗运放和数字电位器组成程控放大器,解决涡街传感器输出信号强度变化大的问题;采用独特的电源设计,为仪表两线制工作提供足够的电流。
参考来源 - 低功耗、两线制涡街流量计数字信号处理系统研制·2,447,543篇论文数据,部分数据来源于NoteExpress
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.
该系统是以微型计算机为主,由脉搏传感器,程控放大器和多功能数据采集器组成。
The system is composed of microcomputer, sensor of pulse, program-control amplifier and data sampler.
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.
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