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Noise Analysis of Signal Components

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

RF Reflectometry Measurements of Quantum Dots

on 20.02.2017 at 16:11 by brunok on Blog of Bruno Küng
diamonds
Introduction Characterizing semiconductor spin qubits with radio-frequency (RF) reflectometry offers a speed advantage over low-frequency conductance measurements thanks to insensitivity to 1/f noise. In this blog post, the measurements of Josip Kukučka and his colleagues working at the Nanoelectronics group at […]

Compensating delay-induced phase shifts for high-frequency resonators

on 20.02.2017 at 14:31 by Romain Stomp on Blog of Romain Stomp
Phase-Locked Loop (PLL) or other PID controllers on nano-mechanical resonators rely on clean phase signals that exhibit large slope, or significant phase shift, around the resonance frequency. For really high-frequency NEMS and opto-mechanical systems above a few tens or hundreds […]

Time-Domain Response of Lock-in Filters

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

Characterizing High-Q 100 pF Capacitors with the Zurich Instruments MFIA

on 30.01.2017 at 09:30 by Tim on Blog of Tim Ashworth
Introduction In the last impedance blog post we discussed how the MFIA could be used to investigate 3000 F capacitors, here we turn to the other end of the spectrum to investigate 100 pF capacitors. Specifically, this blog post looks at […]

The Nyquist Diagram for Electrical Circuits

on 11.01.2017 at 07:10 by Mehdi on Blog of Mehdi Alem
nyqadmmes
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. When dealing with electric circuits, the transfer function is the immittance of the circuit, i.e. […]

Workshop on Nanomechanics – Montpellier, France

on 09.12.2016 at 11:24 by Romain Stomp on Blog of Romain Stomp
df1-map
This workshop organized with CNRS customers in Montpellier among the RéMiSoL network (Réseau des Microscopies à Sondes Locales) focused on all aspects of contact mechanics at the nanoscale and in particular using resonant contact AFM mode (CR-AFM). Contact Resonance tracking measures the […]

Using the MFIA Impedance Analyzer to characterize the ESR of a Super-capacitor

on 01.11.2016 at 10:14 by Tim on Blog of Tim Ashworth
Introduction Super-capacitors are very useful devices providing power for applications ranging from SRAM to high-speed trains. The energy density is 10 – 100 times higher than that of standard (electrolytic) capacitors. And although they have a lower energy density than […]

Frequency Response Measurement with Chirps and Leakage-Free FFT

on 28.10.2016 at 16:08 by brunok on Blog of Bruno Küng
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Introduction This post explains how to measure the frequency response of a component or system with high spectral resolution in a minimum amount of time. Rather than sweeping the frequency and recording each spectral point individually, the approach presented here is […]

LabOne Imaging: Software Trigger’s new Grid Mode

on 27.09.2016 at 11:32 by Daniel on Blog of Daniel Wright
An image obtained using SW Trigger's Grid Mode.
In LabOne Release 16.04 the Software Trigger receives a powerful extension, Grid Mode, which organises the triggered data in a 2-D matrix allowing image construction direct from LabOne. This blog explains how this new functionality works and describes its most […]

Low Noise Digitizer und Lock-in Verstärker

on 29.07.2016 at 13:27 by Marco Brunner on Blog of Marco Brunner
Zurich Instruments setzt mit der Digitizer Option für den MFLI Lock-in Verstärker einen neuen Meilenstein bei Messungen im mittleren und niedrigen Frequenzbereich. Strom- und Spannungssignale werden mit einer Abtastrate von 60 MSa/s und einer Signalbandbreite von 7 MHz digitalisiert. Aussergewöhnlich […]

Working with LabOne Software Trigger Data in Matlab

on 18.04.2016 at 10:42 by Daniel on Blog of Daniel Wright
TriggeredDemodulatorSamples
LabOne’s Software (SW) Trigger allows the user to save bursts of instrument signals (e.g. its demodulator samples or a PID controller’s error value) when a specified trigger condition is met. The SW Trigger works much in the same way as […]

Better Amplitude Accuracy with MFLI Analog Adder

on 07.03.2016 at 17:47 by brunok on Blog of Bruno Küng
Many lock-in applications use a drive signal consisting of a small AC excitation voltage and larger DC offset voltage, for example differential conductance (dI/dV) measurements. Users of the MFLI Lock-in amplifier have the choice between two methods to generate such a signal: […]

LabOne for HF2: using digital lines as trigger sources

on 03.02.2016 at 11:39 by Romain Stomp on Blog of Romain Stomp
Trigger accuracy
Since LabOne 15.11 release and onward, accessible from our download area, all HF2LI users with the enabled HF2LI-WEB option can now benefit from the latest software developments that were previously reserved for the UHFLI. One tool that is now totally new for this […]