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Titolo:
THE VARIABLE GAIN BOOTSTRAP ACTIVE LOAD - A NEW APPROACH TO AMPLIFIERVOLTAGE GAIN ENHANCEMENT AND CONTROL
Autore:
VISOCCHI PM; TAYLOR JT; BETTS AK; HAIGH DG;
Indirizzi:
UNIV LONDON UNIV COLL,DEPT ELECTR & ELECT ENGN LONDON WC1E 7JE ENGLAND
Titolo Testata:
IEEE transactions on circuits and systems. 1, Fundamental theory andapplications
fascicolo: 7, volume: 40, anno: 1993,
pagine: 440 - 448
SICI:
1057-7122(1993)40:7<440:TVGBAL>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECISION FILTERING APPLICATIONS; GAAS; DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
P.M. Visocchi et al., "THE VARIABLE GAIN BOOTSTRAP ACTIVE LOAD - A NEW APPROACH TO AMPLIFIERVOLTAGE GAIN ENHANCEMENT AND CONTROL", IEEE transactions on circuits and systems. 1, Fundamental theory andapplications, 40(7), 1993, pp. 440-448

Abstract

This paper describes a novel technique for obtaining controllable, high-voltage gain in amplifier circuits where current mirrors and cascading techniques cannot be used. An example of this is in high-frequencydesign where suitable complementary devices are generally not available. Although the method was originally intended for use in the design of operational transconductance amplifiers (OTA's) implemented in GaAsMESFET technology for use in high-precision filtering applications, it can be applied to other types of gain stage and implemented in othertechnologies. For example, using the new technique, controllable gains in excess of 40 dB can be obtained using standard GaAs MESFET technology without reliance on device width ratioing or on early saturation. The application of the OTA design in an integrated continuous-time bandpass filter chip is presented with encouraging preliminary results.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 07:48:23