Posts in Category MFLI

Webinar Summary – Boost Your SPM Applications: From Kelvin Probe to Time-Resolved Measurements

on 19.10.2020 at 17:03 by Romain Stomp on Blog of Romain Stomp
Following up on the webinar dedicated to Kelvin Probe Force Microscopy (KPFM) techniques, I’d like to post a short summary in this blog as well as answers to most questions raised during this event. The recording of this webinar can […]

The many applications of the MF-MD Multi-Demodulator option

on 24.08.2020 at 09:08 by Jelena on Blog of Jelena Trbovic
During my research days, lock-in amplifiers were a standard fixture in a transport measurement setup, and there were many of them. Each lock-in measured one signal in the experiment. Adding more lock-in amplifiers in the setup was the only way […]

Nanostructure Transport Characterization Webinar

on 25.05.2020 at 11:31 by Jelena on Blog of Jelena Trbovic
First of all thank you everyone for attending the Nanostructure Transport Characterization Webinar! It was my first Webinar and it was an amazing experience for the whole team. We got a lot of questions and in this blog I will […]

Sensor Characterization and Control

on 25.05.2020 at 08:00 by kivanc on Blog of Kivanç Esat
Sensors come with different flavors. They can be inertial devices for motion detection; can be based on photosensitive materials; can be absorbing surrounding molecules to detect their concentration, and so on. Developments in micromachining and micro/nanoelectromechanical system (MEMS/NEMS) technologies lead to miniaturization and low power consumption. Hence, multiple sensors […]

DC I-V Sweeps on the MFIA

on 10.01.2020 at 09:07 by Tim Ashworth on Blog of Tim Ashworth
Characterizing the impedance of components and materials with the MFIA is done by necessity with an AC signal. However, the MFIA and MFLI can also take DC measurements. This blog post shows how easy it is to take DC measurements, […]

A deep dive into data acquisition with the DAQ tool

on 25.11.2019 at 14:21 by moritz on Blog of Moritz Kirste
Introduction Looking at the heart of experimental science you will find data acquisition. Why? Because even the most perfectly conceived experiment is worth nothing if nobody acquires, analyzes and stores data for further analysis and reproduction of results. Despite its […]

Synchronization of Multiple MFLI Lock-in Amplifiers by MDS

on 16.09.2019 at 00:00 by Mehdi on Blog of Mehdi Alem
Introduction  Multi-channel signal generation and detection are indispensable in many applications such as multi-qubit quantum computing and multi-sensor systems. Synchronization of signal channels comes to the equation when the temporal sequence of events is of interest, especially for fast physical […]

Frequency-Domain Response of Lock-in Filters

on 19.03.2019 at 18:10 by Mehdi on Blog of Mehdi Alem
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 […]

How to Demodulate Multi-frequency Signals such as AM, FM and PM

on 20.03.2018 at 13:26 by Mehdi on Blog of Mehdi Alem
Introduction  When analyzing signals with multiple frequency components, it is important to measure the amplitude and phase of each frequency component accurately so that a change in the characteristics of one component does not affect the measurement of another frequency component. There […]

Kramers–Kronig Test Applied to Impedance Measurements of Electrical Circuits

on 25.09.2017 at 06:57 by Mehdi on Blog of Mehdi Alem
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 […]

SPM Users’ Meeting in Mainz

on 21.07.2017 at 15:08 by Romain Stomp on Blog of Romain Stomp
It was an honor and privilege to host our first SPM Users’ Meeting in Mainz this year, in the group of Prof. Angelika Kuehnle. This 2-day gathering was a time for intense knowledge sharing among Zurich Instruments’ Users with invited […]

Noise Analysis of Signal Components

on 29.03.2017 at 13:57 by Mehdi on Blog of Mehdi Alem
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 […]

Fast auto-approach with MFLI Threshold Unit to control stepper motor

on 22.02.2017 at 11:19 by Romain Stomp on Blog of Romain Stomp
In many applications where the distance between two objects need to be reduced to a predefined gap, the ability to control a stepper motor with clear stop conditions from different sensors is of high practical interest. Such functionality can be […]

Time-Domain Response of Lock-in Filters

on 09.02.2017 at 08:36 by Mehdi on Blog of Mehdi Alem
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 on Blog of Mehdi Alem
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 […]