1. Basic Concept: New Possibilities and Trends in Circuit Design for Analog Signal Processing2. Operational Transconductance Amplifiers (OTAs) and Their Applications3. Current Conveyors, Variants and Applications4. The operational transresistance ampli er (OTRA)5. FTFN: Four Terminal Floating Nullor6. Current Operational Amplifiers7. Current Feedback Operational Ampli ers, CFOA and Applications8. Active Only Circuits: Realizations of Current-Mode and Voltage-Mode Multifunction Filters without External Passive Elements9. MOS-Only and MOS-C Circuits: Fundamentals of MOS-Only and MOS-C Circuits10. Versatile active elements, structure and applications11. DTMOS-Based Ultra Low-Voltage Low-Power Circuit Design12. High-precision current-mode circuits based on the MOS-translinear principle