Póvoa, R.Lourenço, N.Martins, R.Canelas, A.Horta, N.Goes, J.2025-02-182025-02-182018-11R. Póvoa, N. Lourenço, R. Martins, A. Canelas, N. Horta and J. Goes, "Single-Stage OTA Biased by Voltage-Combiners With Enhanced Performance Using Current Starving," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 65, no. 11, pp. 1599-1603http://hdl.handle.net/10400.26/54461This brief presents an improved single-stage amplifier biased by voltage-combiners, through the proper usage of current starving. The topology designed and fabricated shows an enhancement of the low-frequency gain, an improvement in the establishing time due to enhanced gain-bandwidth product, and a high improvement of the energy efficiency. The circuit was optimized using AIDA-C, a state-of-the-art multi-objective multi-constraint analog IC sizing and optimization tool, and simulation results demonstrate that a gain above 60 dB and a figure-of-merit over 900 MHz×pF/mA are acquirable with this circuit, using the UMC 130-nm technology design kit. The circuit was fabricated and experimentally measured, presenting a gain of 58 dB with a figure-of-merit of 1102 MHz×pF/mA, for a 3.3 V supply source.engjournal article10.1109/TCSII.2017.2777533