Design of low power sub-threshold two-stage CMOS OTAs using different compensation techniques
Fecha
2018Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Trabajo Fin de Máster/Master Amaierako Lana
Impacto
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nodoi-noplumx
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Resumen
In this current final master thesis, different compensation techniques will be studied,
simulated and compared in CMOS amplifiers. Specifically, these techniques will be applied in twostage
Operational Transconductance Amplifiers (OTAs). Due to the presence of both stages, the
compensation techniques will be required to maintain the stability of the system. Another important
aspect to conside ...
[++]
In this current final master thesis, different compensation techniques will be studied,
simulated and compared in CMOS amplifiers. Specifically, these techniques will be applied in twostage
Operational Transconductance Amplifiers (OTAs). Due to the presence of both stages, the
compensation techniques will be required to maintain the stability of the system. Another important
aspect to consider is the inversion mode used. The circuit will be designed using the sub-threshold
mode to obtain a low voltage-low power system. Using these compensation techniques with the
transistors operating in the sub-threshold mode, two OTAs will be designed. One of them will be
based in a Class-A amplifier, and the another in a Class-AB amplifier which uses the Quasi Floating-
Gate (QFG) transistor technique. The objective is to compare them by some Figures of Merits (FOM),
and relate them to different aspects of the system such as consumption, bandwidth, phase margin or
slew rate. Finally, an optimal configuration will be found by these FOM. [--]
Materias
Analog CMOS integrated circuits,
Operational transconductance amplifier (OTA),
Sub-threshold,
Frequency compensation,
Two-stage amplifier,
Figure of merit (FOM),
Optimization,
Class-A and Class-AB amplifiers,
Quasi floating-gate (QFG)
Titulación
Máster Universitario en Ingeniería de Telecomunicación por la Universidad Pública de Navarra /
Nafarroako Unibertsitate Publikoko Unibertsitate Masterra Telekomunikazio Ingeniaritzan