A DTMOS-based power efficient recycling folded cascode operational transconductance amplifier
The focus of the present study is on a recycling folded cascode (RFC) operational transconductance amplifier (OTA) in which the transconductance, as well as the slew rate of OTA, are enhanced. RFC OTA, proposed in this study, is employed using a Dynamic Threshold Voltage MOSFET (DTMOS) based differe...
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| Veröffentlicht in: | Analog integrated circuits and signal processing 2021-04, Vol.107 (1), p.227-238 |
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| container_title | Analog integrated circuits and signal processing |
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| creator | Khade, Amitkumar S. Musale, Sandeep Suryawanshi, Ravikant Vyas, Vibha |
| description | The focus of the present study is on a recycling folded cascode (RFC) operational transconductance amplifier (OTA) in which the transconductance, as well as the slew rate of OTA, are enhanced. RFC OTA, proposed in this study, is employed using a Dynamic Threshold Voltage MOSFET (DTMOS) based differential pair with class AB operation. To achieve class AB operation, an adaptive biasing technique comprising a flip voltage follower is used which boosts the dynamic current and gain-bandwidth product of OTA. Conventional current mirrors are replaced with source degenerated non-linear current mirrors to achieve a better slew rate. The conventional and proposed RFC structures are designed and simulated in a standard 180 nm CMOS process at 1 V supply voltage. The proposed RFC OTA demonstrates a significant enhancement in the performance parameter as 11 dB improvement in the gain as well as 290% more GBW and achieves a slew rate that is nine times better compared to the conventional RFC. |
| doi_str_mv | 10.1007/s10470-021-01809-y |
| format | Article |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Circuits and Systems CMOS Current mirrors Electrical Engineering Engineering Mixed Signal Letter MOSFETs Operational amplifiers Recycling Signal,Image and Speech Processing Slew rate Threshold voltage Transconductance |
| title | A DTMOS-based power efficient recycling folded cascode operational transconductance amplifier |
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