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EnglishThis paper presents a low-power, area-efficient three-stage CMOS Operational Transconductance Amplifier (OTA) suitable for very large capacitive loads, CL. A single Miller capacitor and an inverting current buffer embedded in the input stage are exploited to implement the frequency compensation network. Additional feed-forward path and a slew rate enhancer are also utilized to improve the large-signal transient response. Detailed small-signal analysis reveals that the proposed one does not exhibit an upper limit of drivable CL. The OTA is fabricated in a standard 0.35-μm technology and occupies 0.0027 mm² of die area. Under 1.4-V supply and 6.36-μA quiescent current consumption, it provides a DC gain greater than 110 dB and is stable for any CL larger than 5 nF. Comparison with the state of the art shows remarkable improvement of both small-and large-signal performance.
| Titolo: | High-Performance Three-Stage Single-Miller CMOS OTA with no Upper Limit of CL |
| Autori interni: | |
| Data di pubblicazione: | 2018 |
| Rivista: | |
| Handle: | http://hdl.handle.net/20.500.11769/316475 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/20.500.11769/316475
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