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Luigi Lombardi, Gianvito Matarrese and Cristoforo Marzocca
The quartz tuning fork used as an acoustic sensor in quartz-enhanced photo-acoustic spectroscopy gas detection systems is usually read out by means of a transimpedance preamplifier based on a low-noise operational amplifier closed in a feedback loop. The...
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Zaiyuan Wang, Jiehao Wang, Fan Li, Yuhang Li, Long Tian and Qiang Liu
We present a low-intensity noise single-frequency Yb-doped all-fiber amplifier oriented to space-borne gravitational wave detection. Relative intensity noise (RIN) below -70 dBc/Hz @ 1 mHz~1 Hz was achieved by virtue of feedback-loop-based intensity nois...
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Andrea Ballo, Alfio Dario Grasso and Salvatore Pennisi
This work presents a two-stage operational transconductance amplifier suitable for sub-1 V operation. This characteristic is achieved thanks to the adoption of a bulk-driven non-tailed differential pair. Local positive feedback is exploited to boost the ...
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Israel Corbacho, Juan M. Carrillo, José L. Ausín, Miguel Á. Domínguez, Raquel Pérez-Aloe and J. Francisco Duque-Carrillo
The implementation of a fully-differential (FD) instrumentation amplifier (IA), based on indirect current feedback (ICF) and aimed to electrical impedance measurements in an Internet of Things (IoT) biomedical scenario, is presented. The IA consists of t...
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Diaaeldin Abdelrahman, Christopher Williams, Odile Liboiron-Ladouceur and Glenn E. R. Cowan
To mitigate the trade-off between gain and bandwidth of CMOS multistage amplifiers, a receiver front-end (FE) that employs a high-gain narrowband transimpedance amplifier (TIA) followed by an equalizing main amplifier (EMA) is proposed. The EMA provides ...
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Anindita Paul, Jaime Ramirez-Angulo, Héctor Vázquez-Leal, Jesús Huerta-Chua and Alejandro Diaz-Sanchez
A highly power-efficient, fully differential Miller op-amp with accurately controlled output quiescent current is introduced. The op-amp can drive both capacitive and resistive load due to the presence of the auxiliary amplifier. This amplifier helps to ...
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Agata Romanova and Vaidotas Barzdenas
The work reports on the development of a detailed noise current model for a low-noise capacitive feedback transimpedance amplifier (TIA) in CMOS. The proposed TIA circuit implements the programmable-gain using an array of discretely controlled feedback c...
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San-Fu Wang, Hua-Pin Chen, Yitsen Ku and Yi-Fang Li
This paper proposes a high-input impedance voltage-mode (VM) multifunction biquad filter which employs three current-feedback amplifiers (CFAs), three resistors, and two grounded capacitors. The proposed VM multifunction biquad filter has single-input an...
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Andrea Ballo, Salvatore Pennisi and Giuseppe Scotti
A two-stage CMOS transconductance amplifier based on the inverter topology, suitable for very low supply voltages and exhibiting rail-to-rail output capability is presented. The solution consists of the cascade of a noninverting and an inverting stage, b...
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Anindita Paul, Mario Renteria-Pinon, Jaime Ramirez-Angulo, Ricardo Bolaños-Pérez, Héctor Vázquez-Leal, Jesús Huerta-Chua and Alejandro Diaz-Sánchez
An approach to implement single-ended power-efficient static class-AB Miller op-amps with symmetrical and significantly enhanced slew-rate and accurately controlled output quiescent current is introduced. The proposed op-amp can drive a wide range of res...
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