CMOS Current Amplifiers
Springer Science & Business Media, Feb 28, 1999 - Technology & Engineering - 159 pages
CMOS Current Amplifiers presents design strategies for high performance current amplifiers based on CMOS technology. After an introduction to various architectures of operational amplifiers, the operating principles of the current amplifier are outlined. This book provides the reader with simple and compact design equations for use in a pencil and paper design and the following simulation step.
Chapter 1 introduces the general aspects of current amplifiers. After a preliminary classification of operational amplifiers, ideal blocks and models are discussed for different architectures and a first high-level comparison is made between traditional amplifiers and current amplifiers. Analysis and examples of basic circuits, as well as signal processing applications involving current amplifiers, are also given. Non-idealities and second- order effects causing limitations in performance are then discussed and evaluated. Chapter 2 focuses on low-drive current amplifiers. Several design examples for current conveyors and class A current amplifiers are discussed in detail and design equations are presented for the main performance parameters, which allows a good trade-off between requirements. High-performance solutions for high bandwidth and low voltage capability are also considered, and, finally, current comparators with progressively enhanced performance are reported and analyzed critically. Chapter 3 deals with current amplifiers for off-chip loads. Several class AB current-mode output stages are discussed and design strategies which improve performance are presented. A detailed analysis of non-ideal effect is carried out with particular emphasis on linearity. Design examples are given and circuit arrangements for further developments are included.
CMOS Current Amplifiers serves as an excellent reference for researchers and professionals of analog IC design, and may also be used as an advanced text on current amplifiers.
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A/D Converters achieved Analog Integrated Circuits applications architecture aspect ratios bias current capacitance capacitor cascode CCII CCII+ CFOA channel-length modulation circuit in Fig Circuits and Signal Circuits and Systems class AB closed-loop gain CMOS Current compensation circuit current amplifier current comparator Current Conveyor current follower current mirrors current output stage current source Current-Mode Electronics Letters equivalent circuit feedback amplifier Filters frequency compensation frequency response fully differential harmonic distortion IEEE IEEE Trans implemented input and output input current input resistance input stage ISBN linearity load loop gain mismatches noise current offset compensation offset voltage op-amp open-loop gain Operational Amplifier output current output resistance parameters quiescent current resistors schematic shown in Fig Signal Processing simulated slew rate Solid-State Circuits solution ss Fig switch terminal X topology transconductance gain transconductance stage transistor aspect ratios Translinear transresistance amplifier unity-gain configuration VFCOA voltage amplifier voltage follower voltage-mode