{"ID":2885302,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2508.05499","arxiv_id":"2508.05499","title":"0.6-V, uW-Power 4-Stage OTA with Minimal Components and 100X Load Range","abstract":"A four-stage operational transconductance amplifier (OTA) for ultra-low-power applications is introduced in this paper. The proposed circuit inclusive of frequency compensation requires minimal transistor count and passives, overcoming the traditionally difficult compensation of 4-stage OTAs and bringing it back to the simplicity of 3-stage OTAs. At the same time, the proposed circuit achieves high power efficiency, as evidenced by the \u003e3.7X (\u003e11.3X) improvement in the large-signal (small-signal) power efficiency figure of merit FOML (FOMS), compared to prior 4-stage OTAs (sub-1 V multi-stage OTAs). Thanks to the lower sensitivity of the phase margin to the load capacitance, the proposed OTA remains stable under a wide range of loads (double-sided as in any 3-4-stage OTA), achieving a max/min ratio of the load capacitance of \u003e100X.","short_abstract":"A four-stage operational transconductance amplifier (OTA) for ultra-low-power applications is introduced in this paper. The proposed circuit inclusive of frequency compensation requires minimal transistor count and passives, overcoming the traditionally difficult compensation of 4-stage OTAs and bringing it back to the...","url_abs":"https://arxiv.org/abs/2508.05499","url_pdf":"https://arxiv.org/pdf/2508.05499v1","authors":"[\"M. Privitera\",\"A. D. Grasso\",\"A. Ballo\",\"M. Alioto\"]","published":"2025-08-07T15:35:14Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}