Posts in Category Lock-in Amplifier

Deep Level Transient Spectroscopy Using HF2LI Lock-in Amplifier

on 23.05.2015 at 10:58 by James Wei on Blog of James Wei
Co-author and main contributor: Dr. Antonio Braga Introduction A very small concentration of lattice point defects, or simply defects, such as vacancies, impurities, dislocations, grain boundaries or cavities, are responsible for creating many different properties in semiconductors. Defects play a crucial […]

Measuring the I-V Characteristic of PN Junction Devices with HF2LI Lock-in Amplifier

on 13.05.2015 at 09:24 by James Wei on Blog of James Wei
Co-author and main contributor: Dr. Antonio Braga Introduction The p-n junction is the fundamental building block of semiconductor material electronics device such as transistors, diodes, sensors, laser, light emitting diodes, as well as solar cells. If one wants to know […]

Sideband Analysis with Lock-in Amplifiers

on 27.02.2014 at 20:10 by Sadik on Blog of Sadik Hafizovic
When a sinusoidal waveform is periodically modulated in either amplitude or frequency sidebands are generated as a result of this carrier modulation. These sidebands can be measured using a lock-in amplifier. Zurich Instruments lock-in amplifiers (HF2LI and UHFLI) can measure […]

What it Takes for High-Speed AFM Measurements

on 19.02.2014 at 14:06 by Romain Stomp on Blog of Romain Stomp
Typically for biological and catalysis applications, time matters! And AFM images that record in 10 minutes or more are not acceptable. We often receive inquiries about what constitutes a complete solution for ‘fast AFM’ and what Zurich Instruments can offer […]

Taking Your Microfluidics EIS Measurement to the Ultra-High Frequency Domain

on 08.01.2014 at 13:28 by James Wei on Blog of James Wei
Introduction The HF2IS Impedance Spectroscope from Zurich Instruments is a versatile tool suitable for label-free electrical impedance spectroscopy (EIS) of single cells in the domain of cell counting and discrimination. The high frequency range, from DC to 50 MHz, and the […]

Square Wave and Sawtooth Wave Generation with HF2LI Lock-in Amplifier

on 13.12.2013 at 09:52 by James Wei on Blog of James Wei
Normally, HF2LI users only generate sinusoidal waveforms with the HF2LI lock-in amplifiers. The HF2LI can also generate square and sawtooth waves, although this is not a supported feature. This blog will go through the setups necessary for doing just that. […]

Top 10 Ways to Improve Your Lock-in Amplifier Measurement

on 08.11.2013 at 10:55 by Sadik on Blog of Sadik Hafizovic
Meanwhile I have helped so many people working with lock-in amplifiers with a handful of generally applicable Tricks, that I’d like to share them in a compact compilation. Certainly they apply to the Zurich Instruments HF2LI Lock-in Amplifier and to […]

DC Offsets Measurement with the HF2LI Lock-in Amplifier

on 04.10.2013 at 11:55 by Romain Stomp on Blog of Romain Stomp
At first thought, DC measurements might be outside the scope of standard lock-in amplifiers. With the HF2LI one has several tools to monitor and record the DC offset while measuring the modulated signal. In practice, many customers need to record […]

Operate HF2LI dual-channel lock-in amplifier with one reference frequency

on 24.05.2013 at 11:43 by James Wei on Blog of James Wei
This blog quickly described how to synchronize the lock-in reference for both lock-in channels of HF2LI lock-in amplifier. HF2LI lock-in amplifier comes with two independent lock-in channels which offers HF2LI users substantially more flexibility compared to the single lock-in setup. With […]

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