The amplifier input is a voltage proportional to the photocurrent signal produced by a photodiode, which is irradiated by a modulated light beam at the same chopper frequency.
放大器输入为电压信号，与光敏二极管产生的光电流信号成比例。调制光柱以断路器同样的频率照射光敏二极管。
This paper describes a method of suppressing correlation jamming at the frequency of reference signal which cannot be suppressed by lock-in amplifier and Boxcar integrator.
锁定放大器和取样积分器都不能抑制与参考信号同频率的干扰。本文提出了一种能抑制这种干扰的方法。
This article introduces a technology of time amplifier based on frequency converter. It can be used for phase detection of sine period signal or determination of time delay.
本文介绍一种基于频率变换的时间放大技术，可用于正弦周期信号的相位精确测量或延迟时间测量。
The mix-lookin detection technique for high frequency signal measurement with low frequency look-in amplifier is presented.
本文提出一种利用低频锁相放大器测量高频信号的混频-锁相检测技术。
A new evaluation approach for the in-band nonlinear distortion, which is formed by the orthogonal frequency division multiplex (OFDM) signal passing through the high power amplifier, is presented.
提出了研究正交频分复用(OFDM)信号通过高功率放大器产生的带内非线性畸变的一种新方法。
A bipolar logarithmic intermediate-frequency (if) amplifier with received signal strength indicator (RSSI) circuit for ASK Receiver is 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)。
Each of them is composed of high frequency amplifier, intermediate frequency amplifier and sampling, digital phase uprightness intersector, DDS and the S band signal inspirator for the transmitter.
接收机的每个通道都由高频放大器、中频放大、中频采样、数字正交器组成，另外还有DDS信号产生和频率激励源用来形成雷达发射机所需的S波段脉冲调制激励信号。
The results show that this amplifier has a good amplification effect on the pulse signal at a low repetition frequency.
结果表明，本脉冲光纤放大器对低频脉冲信号有很好的放大效果。
During signal processing, choosing low noise, high-precision, low-power amplifier AD620 as a pre-amplifier, and high-and low-pass filter and the frequency notch filter removal of interfering signals.
在信号处理中选用具有低噪声、高精度、低功耗放大器ad620作为前置放大器，并以高、低通滤波器和工频陷波器清除干扰信号。
During signal processing, choosing low noise, high-precision, low-power amplifier AD620 as a pre-amplifier, and high-and low-pass filter and the frequency notch filter removal of interfering signals.
在信号处理中选用具有低噪声、高精度、低功耗放大器ad620作为前置放大器，并以高、低通滤波器和工频陷波器清除干扰信号。
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