Posts in Category MATLAB

Noise Analysis of Signal Components

on 29.03.2017 at 13:57 by Mehdi
Introduction  In this post, the relation between the noise of signal amplitude and phase on one hand and the noise of in-phase and quadrature components of the signal on the other hand is investigated. We try to respond to the wrong […]

Time-Domain Response of Lock-in Filters

on 09.02.2017 at 08:36 by Mehdi
Introduction  The heart of a lock-in amplifier is a phase-sensitive detector which includes a signal mixer and a low-pass filter. In this post, we focus on the time response of the low-pass filters implemented in Zurich Instruments lock-in amplifiers including […]

The Nyquist Diagram for Electrical Circuits

on 11.01.2017 at 07:10 by Mehdi
Introduction The Nyquist diagram of a transfer function is a parametric plot of its imaginary part versus real part as the frequency sweeps in a certain range [1]. When dealing with electric circuits, the transfer function is the immittance [2] of the […]