scholarly journals Front-End Amplifiers for Tuning Forks in Quartz Enhanced PhotoAcoustic Spectroscopy

2020 ◽  
Vol 10 (8) ◽  
pp. 2947 ◽  
Author(s):  
Giansergio Menduni ◽  
Angelo Sampaolo ◽  
Pietro Patimisco ◽  
Marilena Giglio ◽  
Stefano Dello Russo ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Ambient Air ◽  
Input Voltage ◽  
Transimpedance Amplifier ◽  
Differential Input ◽  
Fully Differential ◽  
Front End ◽  
Differential Voltage ◽  
Voltage Amplifier ◽  
Tuning Forks

A study of the front-end electronics for quartz tuning forks (QTFs) employed as optoacoustic transducers in quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing is reported. Voltage amplifier-based electronics is proposed as an alternative to the transimpedance amplifier commonly employed in QEPAS experiments. The possibility to use differential input/output configurations with respect to a single-ended configuration has also been investigated. Four different architectures have been realized and tested: a single-ended transimpedance amplifier, a differential output transimpedance amplifier, a differential input voltage amplifier and a fully differential voltage amplifier. All of these amplifiers were implemented in a QEPAS sensor operating in the mid-IR spectral range. Water vapor in ambient air has been selected as the target gas species for the amplifiers testing and validation. The signal-to-noise ratio (SNR) measured for the different configurations has been used to compare the performances of the proposed architectures. We demonstrated that the fully differential voltage amplifier allows for a nearly doubled SNR with respect to the typically used single-ended transimpedance amplifier.

Fully-Integrated 6H-SiC JFET Amplifiers for High-Temperature Sensing

2010 ◽  
Vol 645-648 ◽  
pp. 1107-1110
Author(s):  
Amita Patil ◽  
Xiao An Fu ◽  
Mehran Mehregany ◽  
Steven Garverick
Keyword(s):  
Room Temperature ◽  
Low Frequency ◽  
Open Loop ◽  
Single Stage ◽  
Transimpedance Amplifier ◽  
Gain Bandwidth ◽  
Fully Integrated ◽  
Differential Voltage ◽  
Gain Variation ◽  
Voltage Amplifier

Fully monolithic, transimpedance and differential voltage amplifiers are reported in this paper based on 6H-SiC, n-channel, depletion-mode JFETs. The single-stage transimpedance amplifier has a low-frequency gain of ~222 kΩ at room temperature, with ~2% gain matching for copies on a 6-mm x 6-mm die. The transimpedance gain is set by an integrated resistor and is ~1.1 MΩ at 450oC. The single-stage, differential voltage amplifier has a typical gain-bandwidth of ~2.8 MHz at 600oC and a typical open-loop voltage gain of ~35.8 dB at 25oC, with less than 1-dB gain variation from 25-600oC.

scholarly journals Grid Integrated Solar Energy Conversion System Using Super-Lift Converter

2018 ◽  
Vol 7 (2.24) ◽  
pp. 177
Author(s):  
Elangovan P ◽  
Kamatchi . ◽  
Nandhini . ◽  
Kamaatchi Devi ◽  
Kokila .
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Solar Energy Conversion ◽  
Input Voltage ◽  
Power Losses ◽  
Unity Power Factor ◽  
Pv System ◽  
Front End ◽  
Current Input ◽  
Energy Conversion System

Grid integrated photovoltaic (PV) system is capable of maximizing solar energy conversion by minimizing power losses. Conventionally, the grid integrated PV system uses boost or buck-boost DC-DC converters in the DC link for lifting up the PV output. Also, a separate complex circuit is used for active power compensation in the grid end. This paper proposes an advanced DC-DC converter by name Super-Lift Converter (SLC) in the DC link of grid integrated PV system. Unlike the conventional DC-DC converters, the proposed converter lifts up the DC link voltage thrice that of the input voltage. In addition, the proposed SLC is regulated using a PI controlled active front end (AFE) topology, which results in operation of unity power factor at grid end. The suggested system is simulated using MATLAB software. The presented results such as grid end voltage and current, input and output power of SLC and DC link voltage validates the effectiveness of the developed system.  

scholarly journals RF Transimpedance Amplifier for CATV Applications over PON

2017 ◽  
Vol 5 ◽  
Author(s):  
Guillermo Royo ◽  
Carlos Sánchez-Azqueta ◽  
Concepción Aldea ◽  
Santiago Celma
Keyword(s):  
Communication Systems ◽  
Gain Control ◽  
Cmos Technology ◽  
Transimpedance Amplifier ◽  
Control Range ◽  
Fully Differential ◽  
Rf Signals ◽  
Input Range ◽  
Transimpedance Gain

In this work, we present a fully differential transimpedance amplifier (TIA) with controllable transimpedance for use in RF overlay downstream communication systems. The transimpedance amplifier has been designed in a standard 180-nm CMOS technology and it is intended for 47 MHz to 870 MHz subcarrier multiplexed RF signals. It performs a 18 dBΩ transimpedance gain control range for extended optical input range from -6 dBm up to +2 dBm.

Excess noise measurement in avalanche photodiodes using a transimpedance amplifier front-end

2006 ◽  
Vol 17 (7) ◽  
pp. 1941-1946 ◽  
Author(s):  
K S Lau ◽  
C H Tan ◽  
B K Ng ◽  
K F Li ◽  
R C Tozer ◽  
...  
Keyword(s):  
Avalanche Photodiodes ◽  
Noise Measurement ◽  
Excess Noise ◽  
Transimpedance Amplifier ◽  
Front End
Sign in / Sign up

Export Citation Format

Share Document