In recent years, the rapidly growth of CMOS technology has evolved towards submicron and deep-submicron features. Due to smaller device sizes, and significant demand for low-power designs, the maximum allowable power supply voltage is restricted. So far, two solutions; clock boosting and switched opamp schemes have been proposed. The material...
Switched-capacitor (SC) circuits are commonly used for analog signal processing
because they can be used to realize precision filters and data converters on an
integrated circuit (IC). However, for high speed applications SC circuit operating
speeds are limited by the internally-compensated opamps found in SC integrators,
a common building block...
The most accurate method for performing analog signal processing in MOS
(metal-oxide-semiconductor) integrated circuits is through the use of switched-capacitor
circuits. A switched-capacitor circuit operates as a discrete-time signal
processor. These circuits have been used in a variety of applications, such as
filters, gain stages, voltage-controlled oscillators, and modulators.
Recently, switched capacitor DC/DC converters are extensively used in
portable electronic devices because they feature many advantages, such as high
efficiency, small package, low quiescent current, minimal external components and
In this thesis, two step-down switched capacitor DC/DC converters are
designed. One has the fixed output options 1.5V,...
To realize pipelined ADCs in deep-submicron processes, low voltage techniques
must be developed to work around problems created by limited supply voltages such as
the floating switch dead zone, reduced SNR, and reduced OpAmp performance.
This thesis analyzes standard and low voltage design issues for pipelined ADCs
and proposes a...
A comprehensive and scalable solution for high-performance switched capacitor amplification is presented. Central to this discussion is the concept of ring amplification. A ring amplifier is a small modular amplifier derived from a ring oscillator that naturally embodies all the essential elements of scalability. It can amplify with accurate rail-to-rail...
Analog-to-digital converters (ADCs) convert analog
continuous time signals into discrete time, digital format. One
precondition that must be met for conventional nyquist rate ADCs is
that the input signal must be suitably band-limited to an input
bandwidth less than the nyquist frequency. This mandates expensive
anti-alias filters which contribute to...
Pipelined analog to digital converters (ADCs) are very important building
blocks in many electronic systems such as high quality video systems, high
performance digital communication systems and high speed data acquisition systems.
The rapid development of these applications is driving the design of pipeline ADCs
towards higher speed, higher dynamic...
This dissertation presents a low-power high-resolution delta-sigma ADC. Two new architectural design techniques are proposed to reduce the power dissipation of the ADC. Compared to the conventional active adder, the direct charge transfer (DCT) adder greatly saves power by keeping the feedback factor of the active adder unity. However, the...
Recent advances in high density low cost RF and microwave three dimensional
integration technologies using LTCC(Low Temperature Cofired Ceramics),
laminate and other multilayer hybrid and integrated circuits have increased interest
in the design of embedded passive components such as inductors, capacitors and
filters. The purpose of this study is to...