Effect of Positive Capacitive Feedback on the OTA Response

Effect of Positive Capacitive Feedback on the OTA Response

This paper presents a new method to decrease the distance of the poles situated in two different nodes of an amplifier by using a positive feedback capacitor. The method can be used in various situations such as shaping the frequency response to help compensating of an OTA or suppressing the effect...

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Bibliographische Detailangaben
Hauptverfasser: Aminzadeh, H., Radiom, S.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Capacitors
compensation
Degradation
Differential amplifiers
Feedback circuits
Feedback loop
Frequency response
GBW
Negative feedback
Operational amplifiers
Positive feedback
Radiofrequency amplifiers
Strontium
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Beschreibung
Zusammenfassung:This paper presents a new method to decrease the distance of the poles situated in two different nodes of an amplifier by using a positive feedback capacitor. The method can be used in various situations such as shaping the frequency response to help compensating of an OTA or suppressing the effect of some poles in a fully differential multistage amplifier to increase its GBW. The technique seems to be functional with any type of two stage and multistage op-amps and is usually very easy to implement.
ISSN:2159-1660
DOI:10.1109/ICM.2005.1590044