Title :
The differential difference operational floating amplifier: a new block for analog signal processing in MOS technology
Author :
Mahmoud, Soliman A. ; Soliman, Ahmed M.
Author_Institution :
Dept. of Electron. & Commun. Eng., Cairo Univ., Giza, Egypt
fDate :
1/1/1998 12:00:00 AM
Abstract :
A wide-range differential difference operational floating amplifier (DDOFA) is introduced. The DDOFA is a new block useful for continuous-time analog signal processing. The DDOFA is realized using a differential difference transconductor with large signal handling capability and a single input differential output current op-amp. The DDOFA forces two differential voltages to the same value and provides two balanced output currents. This brief presents a CMOS realization of the DDOFA, and some of its applications are provided, such as a voltage-to-current converter, MOS-grounded and floating resistors, a MOS multiplier/divider cell, a differential integrator, a continuous-time MOS-C filter, a MOS-C current oscillator, and a MOS-C floating inductor. Simulation results for the DDOFA circuit and its applications are given
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; continuous time systems; differential amplifiers; operational amplifiers; CMOS technology; DDOFA circuit simulation; MOS multiplier/divider cell; MOS-C current oscillator; MOS-C floating inductor; MOS-grounded resistor; continuous-time MOS-C filter; continuous-time analog signal processing; differential difference operational floating amplifier; differential integrator; floating resistor; opamp; transconductor; voltage-to-current converter; Circuit simulation; Differential amplifiers; Filters; Inductors; Operational amplifiers; Resistors; Signal processing; Transconductors; Voltage; Voltage-controlled oscillators;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
