Results 41 to 50 of about 9,665 (208)

Low Noise Balanced Homodyne Detector for Quantum Noise Measurement

IEEE Access, 2022
The research of quantum noise in the interaction of laser and atoms plays a critical role in quantum optical experiments. The measurement of quantum noise is mainly based on the balanced homodyne detection method.
Shubo Lang, Shicheng Zhang, Xiaolin Li, Yueping Niu, Shangqing Gong   +4 more
doaj   +1 more source

Differential Bloch Oscillating Transistor Pair

, 2013
We examine a Bloch Oscillating Transistor pair as a differential stage for cryogenic low-noise measurements. Using two oppositely biased, nearly symmetric Bloch Oscillating Transistors, we measured the sum and difference signals in the current gain and ...
Hakonen, Pertti J., Hassel, Juha, Puska, Antti, Sarkar, Jayanta   +3 more
core   +1 more source

Development of a multistage laser frequency stabilization for an interferometric gravitational-wave detector [PDF]

, 2003
Laser frequency stabilization is essential for interferometric gravitational-wave detectors to attain their target sensitivity. We have designed a multistage laser frequency stabilization system which has been applied in the development of the TAMA 300 ...
Barton, Mark A., Nagano, Shigeo
core   +1 more source

CMRR-Bandwidth Extension Technique for CMOS Differential Amplifiers [PDF]

AEU - International Journal of Electronics and Communications, 2014
An exemplary design demonstrates how to extend the common-mode rejection ratio (CMRR) bandwidth of a CMOS differential amplifier. The design presented uses MOSFETs with a channel length of 180nm. A novel circuit technique is employed that partially compensates for the output capacitance of the tail current sink, thereby more than quadrupling the CMRR ...
Ben-Esmael, M, Hart, B, Hayatleh, K
openaire   +3 more sources

Stress, Personality, Attachment, and Coping Strategies During the COVID-19 Pandemic: The STERACOVID Prospective Cohort Study Protocol

Frontiers in Psychiatry, 2022
BackgroundDue to the lockdown linked to the COVID-19 pandemic, the French National Authority for Health has recommended reinforced follow-up of psychiatric patients, with particular attention to people over 65 years.
Arlette Edjolo, Arlette Edjolo, Jean-Michel Dorey, Mathieu Herrmann, Catherine Perrot, Cécile Lebrun-Givois, Aurélie Buisson, Hanane El Haouari, Bernard Laurent, Bernard Laurent, Elodie Pongan, Isabelle Rouch, Isabelle Rouch, Isabelle Rouch   +13 more
doaj   +1 more source

Versatile Wideband Balanced Detector for Quantum Optical Homodyne Tomography

, 2011
We present a comprehensive theory and an easy to follow method for the design and construction of a wideband homodyne detector for time-domain quantum measurements.
A. MacRae, A.I. Lvovsky, Aichele, Appel, Bachor, Bimbard, Chi, E. Barrios, E. Cairns, E.H. Huntington, Federov, Haderka, Hansen, Huisman, Lobino, Lvovsky, Neergaard-Nielsen, Neergaard-Nielsen, Okubo, R. Kumar, Sasaki, Vogel, Yuen, Zavatta   +23 more
core   +1 more source

High CMRR CMOS current operational amplifier

Electronics Letters, 1994
A CMOS realisation of a current operational amplifier operating under 3 V supply voltage is presented. The proposed implementation provides very high common-mode rejection. Results of HSPICE simulation show a high open loop current gain of 67 dB, a gain-bandwidth product of ~100 MHz and a common-mode rejection ratio of 150 dB.
E. Abou-Allam, E.I. El-Masry
openaire   +1 more source

A neural probe with up to 966 electrodes and up to 384 configurable channels in 0.13 μm SOI CMOS [PDF]

, 2017
In vivo recording of neural action-potential and local-field-potential signals requires the use of high-resolution penetrating probes. Several international initiatives to better understand the brain are driving technology efforts towards maximizing the ...
Andrei, Alexandru, Ballini, Marco, Mitra, Srinjoy, Mora Lopez, Carolina, Musa, Silke, Putzeys, Jan, Raducanu, Bogdan Cristian, Rochus, Veronique, Severi, Simone, Van Helleputte, Nick, Van Hoof, Chris, Vandebriel, Roeland, Wang, Shiwei, Yazicioglu, Refet Firat   +13 more
core   +1 more source

CMRR analysis of instrumentation amplifiers

Electronics Letters, 1983
A set of the simple and practical expressions for the CMRR of instrumentation amplifiers (IAs) based on 2, 3 and 4 opamps is given. These equations take into account not only mismatch of determined resistors but also the limited value of the CMRR of op-amps used. The derived equations are very useful for tolerance analysis which is shown on the example
openaire   +1 more source

Low-voltage high CMRR OTA for electrophysiological measurements [PDF]

2009 IEEE International Symposium on Circuits and Systems, 2009
With the advent of miniaturised sensors for various engineering and medical applications there is an increased demand of low-power, low-voltage analog building blocks like opamps and OTAs. Degradation of certain amplifier characteristics with supply voltage is a major concern for low-voltage design and often poses contradictory requirement.
Mitra, S, Zele, R, Etienne-Cummings, R
openaire   +1 more source