A Capacitive Feedback 80 dBΩ 1.1 GHz CMOS Transimpedance Amplifier with Improved Biasing
In: 2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES), 2020-06-01
Online
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Zugriff:
The work presents the design of an area-efficient low-noise high-performance CMOS transimpedance amplifier for optical time-domain reflectometers. The proposed solution is based on a low-noise capacitive feedback structure and shows a gain of 83/80 dBΩ with the bandwidth reaching 1.1 GHz and average input-referred noise current density below $1.8 \mathrm{pA}/\sqrt{\mathrm{Hz}}$ in the presence of a 0.7 pF total input capacitance. The noise-efficient feedback structure allows addressing noise problem of conventional feed-forward or resistive feedback devices with the total power consumption around 21 mW while running at 1.8 V power supply. A more accurate design methodology is proposed based on explicit modeling of the biasing circuits and decoupling capacitor and modifications to the reference design are suggested including circuits for PMOS-based biasing and DC current elimination.
Titel: |
A Capacitive Feedback 80 dBΩ 1.1 GHz CMOS Transimpedance Amplifier with Improved Biasing
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Autor/in / Beteiligte Person: | Barzdenas, Vaidotas ; Romanova, Agata |
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Zeitschrift: | 2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES), 2020-06-01 |
Veröffentlichung: | IEEE, 2020 |
Medientyp: | unknown |
DOI: | 10.23919/mixdes49814.2020.9155724 |
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