The differential difference operational floating amplifier: a newblock for analog signal processing in MOS technology

摘要

A wide-range differential difference operational floatingnamplifier (DDOFA) is introduced. The DDOFA is a new block useful forncontinuous-time analog signal processing. The DDOFA is realized using andifferential difference transconductor with large signal handlingncapability and a single input differential output current op-amp. ThenDDOFA forces two differential voltages to the same value and providesntwo balanced output currents. This brief presents a CMOS realization ofnthe DDOFA, and some of its applications are provided, such as anvoltage-to-current converter, MOS-grounded and floating resistors, a MOSnmultiplier/divider cell, a differential integrator, a continuous-timenMOS-C filter, a MOS-C current oscillator, and a MOS-C floating inductor.nSimulation results for the DDOFA circuit and its applications are given