Passive frequency compensation for high gain‐bandwidth and high slew‐rate two‐stage OTA | Zendy

Mirvakili A. | Zendy; Koomson V.J. | Zendy

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Passive frequency compensation for high gain‐bandwidth and high slew‐rate two‐stage OTA

Author(s) -

Mirvakili A.,

Koomson V.J.

Publication year - 2014

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2014.0473

Subject(s) - slew rate , bandwidth (computing) , frequency compensation , stage (stratigraphy) , compensation (psychology) , electronic engineering , materials science , engineering , electrical engineering , telecommunications , amplifier , voltage , geology , psychology , paleontology , psychoanalysis

A passive frequency compensation method is presented for the first time, which can be applied to two/multi‐stage operational transconductance amplifier (OTA) designs, to achieve high gain‐bandwidth (GBW) and high slew‐rate with no increase in the overall power consumption. A nulling resistor with series compensating capacitor is applied in the first stage and extends the GBW by introducing a left‐hand‐plane (LHP) zero. This design is implemented in a 0.18 μm CMOS process and the measured results show a GBW of 100 MHz and average SR of 60 V/μs with a power consumption of 1.7 mW. A high figure of merit (FoM) of 94.7 GHz pF V/μs/mA is achieved.

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