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

Volume

45

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

148

Lastpage

158

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;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.659468

Filename

659468