Phase compensation of the three op amp instrumentation amplifier

The frequency stability of the popular 3 op-amp instrumentation amplifier is discussed. It is shown that the two input stage amplifiers of the conventional circuit should be compensated for unity gain. A simple modification to the circuit that allows the use of uncom-pensated amplifiers is demonstra...

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Veröffentlicht in:	IEEE transactions on instrumentation and measurement 1987-09, Vol.IM-36 (3), p.842-844
1. Verfasser:	White, D. Rod
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Metrology, measurements and laboratory procedures Noise Noise measurement Operational amplifiers Other topics in metrology, measurements and laboratory procedures Phase measurement Phase shifters Physics Radio frequency Rotors
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Beschreibung
Zusammenfassung:	The frequency stability of the popular 3 op-amp instrumentation amplifier is discussed. It is shown that the two input stage amplifiers of the conventional circuit should be compensated for unity gain. A simple modification to the circuit that allows the use of uncom-pensated amplifiers is demonstrated.
ISSN:	0018-9456 1557-9662
DOI:	10.1109/TIM.1987.6312800