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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 […]

How to Generate QAM Signaling with the HDAWG Arbitrary Waveform Generator

on 25.11.2019 at 12:24 by Mehdi on Blog of Mehdi Alem
Introduction  Digital modulation is extensively used in telecommunications, radar systems and quantum technologies. Corresponding to every analog modulation technique, i.e. amplitude modulation (AM), phase modulation (PM) and frequency modulation (FM), there is a digital version of signal modulation: amplitude-shift keying […]

Bioimpedance of a Muscle Contraction with the MFIA

on 22.11.2019 at 09:20 by Tim on Blog of Tim Ashworth
Impedance measurements of biological tissue are commonly used in bio-engineering and life sciences to assess the condition and composition of tissue in a non-invasive, reproducible way.  In addition, bio-impedance measurements, also known as bioelectrical impedance analysis (BIA) or electrical impedance […]

Pseudo-random number generator in the run time of AWGs

on 08.11.2019 at 14:34 by claudius on Blog of Claudius Riek
This post discusses ways to generate noise signals within a well-defined frequency range, amplitude, defined distribution (white, Gaussian, etc.), and minimal correlation using Arbitrary Waveform Generators (AWG). Sample-by-sample programming of the waveform leads to very well-defined properties, but the signal […]

AWG Precompensation for high-fidelity CZ gates in transmon qubits

on 02.11.2019 at 10:44 by Chunyan Shi on Blog of Chunyan
High quantum gate fidelity is essential for all quantum hardware platforms. Temporal sensitivity to flux noise and flux pulse distortion can pose major limitations to achieving high fidelity with repeatable two-qubit gates in transmon qubits. In recent publication, Rol et […]

使用MFIA阻抗分析仪进行自动化二维阻抗扫描

on 24.09.2019 at 11:05 by Meng on Blog of Meng Li
很多器件和材料的阻抗都受到频率和其它参数(例如DC偏置电压)的影响。为了能够完整的表征这些样品,我们需要一种能在两个维度下进行参数扫描的阻抗分析仪。通过使用LabOne自带的任意5个API之一,我们可以轻易控制MFIA阻抗分析仪(或者MFLI锁相放大器和MF-IA升级选件)来进行这种全面参数分析。本文将详细说明如何使用简短的Python 3.7的程序,进行多参数维度的阻抗扫描。

阻抗分析仪的基本精度是什么?

on 23.09.2019 at 08:25 by Meng on Blog of Meng Li
阻抗分析仪的精度是一个重要指标,它定义了器件或样品的实测阻抗和真值的区别大小。因为阻抗分析仪的精度会随着频率和阻抗大小而变化,因此我们使用一种能体现出仪器所能达到的最高精度的指标,即为基本精度,与此同时也能够对不同仪器做横向比较。MFIA阻抗分析仪的基本精度区间很宽,在1 Ohm到1 MOhm和 1 mHz到500 kHz范围内,MFIA可以达到0.05%的基本精度,这对表征不同器件和材料很有帮助。

Resonance enhancement: a tale of two data analysis methods

on 17.09.2019 at 11:37 by Romain Stomp on Blog of Romain Stomp
The Benefit and Challenge of using Resonance Enhancement Resonance enhancement technique is the fastlane toward raising signal well above the noise floor to increase signal-to-noise ratio (SNR) and dynamical range. Such an approach is common for Scanning Probe Microscopy (SPM) […]

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 […]

Are your parametric two-qubit gates limited by the driving AWG?

on 13.09.2019 at 14:39 by janb on Blog of Jan Benhelm
Noise PSD of Zurich Instruments HDAWG
No, is the short answer, if you are using a Zurich Instruments HDAWG. 😀 Here is why Parametrically modulated superconducting qubit gates (parametric gates) are usually accomplished by RF-modulation – typically several hundred MHz – of the flux through a […]

Reloading Data into LabOne Modules

on 29.08.2019 at 12:48 by Tim on Blog of Tim Ashworth
LabOne now supports reloading data into the LabOne Modules when using the HDF5 file format. Starting from LabOne 19.05, data acquired in modules such as the Sweeper, DAQ, Scope and Spectrum Analyzer, can now be reloaded into the same LabOne […]

What is the Basic Accuracy of an Impedance Analyzer?

on 29.08.2019 at 11:09 by Tim on Blog of Tim Ashworth
This blog explains the meaning of basic accuracy when referring to impedance analyzers. The accuracy of an impedance analyzer is a critical parameter that allows the user to know how close the measured impedance will be to the true impedance […]

Automated 2D Impedance Sweep on the MFIA

on 28.08.2019 at 15:43 by Meng on Blog of Meng Li
Many devices and materials exhibit an impedance which depends on both frequency and other parameters such as bias voltage. To fully characterize the impedance of these samples requires an impedance analyzer with the ability to sweep in two dimensions. The MFIA (and MFLI with MF-IA option) can be easily controlled via any of the five included APIs to open up the full parameter space of impedance analysis.This blog details a short script for Python 3.7 which demonstrates the ease in which multi-dimension impedance sweeps can be carried out.

Connect MFLI with External Signal Generator

on 26.07.2019 at 16:18 by Marco Brunner on Blog of Marco Brunner
This blog describes how to use an MFLI lock-in amplifier with an external reference frequency. The reference frequency comes from a signal generator Model 6221 from Keithley which is used to apply higher voltage pulses or sinusoidal signals on the […]

使用MFIA阻抗分析仪测量DC-Link电容器的低串联等效电阻(ESR)和低串联等效电感(ESL)

on 17.07.2019 at 14:59 by Meng on Blog of Meng Li
直流支撑电容器(DC-link 电容器)本身和接口的ESL和ESR对绝缘栅双极晶体管(IGBT)开关模组的性能有着很大的影响。当IGBT模组关闭时,瞬时产生的电压浪涌会储存在寄生电感之中。为了降低或者消除此电压浪涌的影响,设计低ESL的直流支撑电容器至关重要。在本文中,我们将使用MFIA阻抗分析仪和专用的低ESL阻抗测试夹具来验证标称的器件参数。在1 kHz到5 MHz的测试频率范围内,最低的串联等效电感(ESL)仅为9.5 nH (742 kHz),而最低的串联等效电阻(ESR)仅为0.7 mOhm (11 kHz)。