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
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
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 […]

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

on 08.01.2014 at 13:28 by 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
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. […]

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

on 24.05.2013 at 11:43 by 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 […]