Posts tagged Sweeper

Frequency-Domain Response of Lock-in Filters

on 19.03.2019 at 18:10 by Mehdi
Introduction  The response of a lock-in amplifier is characterized by the parameters of its low-pass filter (LPF), i.e. time constant and filter order. The temporal response of the LPF demonstrates the latency of measurement while its spectral response shows the […]

Kramers–Kronig Test Applied to Impedance Measurements of Electrical Circuits

on 25.09.2017 at 06:57 by Mehdi
Introduction  In this post, the Kramers-Kronig relations are used to verify the results of an impedance measurement experiment performed by the Zurich Instruments MFIA Impedance Analyzer or MFLI Lock-in Amplifier equipped with the MF-IA option. The Kramers-Kronig relations state that the real […]

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 […]

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 […]