Single-stage fully recycling folded cascode OTA for switched-capacitor circuits

A single-stage multi-path operational transconductance amplifier (OTA) is presented. The proposed amplifier uses the transconductance enhancing technique in an upgraded folded cascode (FC) amplifier. It significantly improves the DC gain, unity-gain bandwidth and slew rate compared with previous FC...

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Bibliographic Details
Published in:Electronics letters 2015-06, Vol.51 (13), p.977-979
Main Author: Akbari, M
Format: Article
Language:English
Subjects:
Amplification
Bandwidth
Circuits
Circuits and systems
CMOS integrated circuits
CMOS technology
complementary metal‐oxide semiconductor
DC gain
Gain
gain 59.1 dB
Metal oxide semiconductors
Noise levels
Operational amplifiers
power consumption
Semiconductors
single‐stage fully recycling folded cascode OTA
single‐stage multipath operational transconductance amplifier
size 90 nm
slew rate
switched capacitor networks
switched‐capacitor circuits
transconductance enhancing technique
unity‐gain bandwidth
upgraded folded cascode amplifier
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Description
Summary:A single-stage multi-path operational transconductance amplifier (OTA) is presented. The proposed amplifier uses the transconductance enhancing technique in an upgraded folded cascode (FC) amplifier. It significantly improves the DC gain, unity-gain bandwidth and slew rate compared with previous FC amplifiers with the same power consumption. Simulation results in 90 nm complementary metal-oxide semiconductor (CMOS) technology show that the proposed OTA achieves a 59.1 dB DC gain and a gain bandwidth of 650 MHz, which makes it suitable for fast-settling switched-capacitor circuits.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2015.1053