A Compensation Technique for Two-Stage Differential OTAs

Summary, in English

In this paper a frequency compensation method for operational transconductance amplifiers is proposed, which poses no power overhead compared to Miller compensation, while improving the 3dB bandwidth, the unity gain frequency and the slew rate. The technique employees positive feedback to introduce an extra left half plane zero to cancel a pole.The phase margin shows good robustness against process and temperature variations. The proposed technique poses no design constraints on the transconductance or capacitor values which makes it attractive for low power applications with low area overhead.

• Författare: Mohammed Abdulaziz; Markus Törmänen; Henrik Sjöland
• Avdelning/ar: Institutionen för elektro- och informationsteknik; ELLIIT: the Linköping-Lund initiative on IT and mobile communication
• Publiceringsår: 2014
• Språk: Engelska
• Sidor: 594-598
• Publikation/Tidskrift/Serie: IEEE Transactions on Circuits and Systems II: Express Briefs
• Volym: 61
• Issue: 8
• Länkar: http://dx.doi.org/10.1109/TCSII.2014.2327475
• Dokumenttyp: Artikel i tidskrift
• Förlag: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Nyckelord: operational amplifier; low power electronics; active filter; low pass filter; CMOS technology; RF receivers.
• Status: Published
• Projekt: EIT_DARE Digitally-Assisted Radio Evolution
• Forskningsgrupp: Analog RF
• ISBN/ISSN/Övrigt: ISSN: 1549-7747