A Compensation Technique for Two-Stage Differential OTAs

Mohammed Abdulaziz; Markus Törmänen; Henrik Sjöland

doi:10.1109/TCSII.2014.2327475

A Compensation Technique for Two-Stage Differential OTAs

Mohammed Abdulaziz, Markus Törmänen, Henrik Sjöland

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	594-598
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	61
Issue number	8
DOIs	https://doi.org/10.1109/TCSII.2014.2327475
Publication status	Published - 2014

Subject classification (UKÄ)

Electrical Engineering, Electronic Engineering, Information Engineering

Free keywords

operational amplifier
low power electronics
active filter
low pass filter
CMOS technology
RF receivers.

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10.1109/TCSII.2014.2327475

Cite this

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title = "A Compensation Technique for Two-Stage Differential OTAs",

abstract = "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.",

keywords = "operational amplifier, low power electronics, active filter, low pass filter, CMOS technology, RF receivers.",

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AU - Törmänen, Markus

AU - Sjöland, Henrik

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AB - 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.

KW - operational amplifier

KW - low power electronics

KW - active filter

KW - low pass filter

KW - CMOS technology

KW - RF receivers.

U2 - 10.1109/TCSII.2014.2327475

DO - 10.1109/TCSII.2014.2327475

M3 - Article

SN - 1549-7747

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JO - IEEE Transactions on Circuits and Systems II: Express Briefs

JF - IEEE Transactions on Circuits and Systems II: Express Briefs

IS - 8

ER -

A Compensation Technique for Two-Stage Differential OTAs

Abstract

Subject classification (UKÄ)

Free keywords

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