Esparza Alfaro, FermínPennisi, SalvatorePalumbo, GaetanoLópez Martín, Antonio2019-11-202019-11-202014F. Esparza-Alfaro, S. Pennisi, G. Palumbo and A. J. Lopez-Martin, "Low-Power Class-AB CMOS Voltage Feedback Current Operational Amplifier With Tunable Gain and Bandwidth," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 61, no. 8, pp. 574-578, Aug. 2014. doi: 10.1109/TCSII.2014.23273901549-774710.1109/TCSII.2014.2327390https://academica-e.unavarra.es/handle/2454/35409A CMOS class AB variable gain Voltage Feedback Current Operational Amplifier (VFCOA) is presented. The implementation is based on class AB second generation current conveyors and exploits an electronically tunable transistorized feedback network. The circuit combines high linearity, low power consumption and variable gain range from 0 to 24 dB with nearly constant bandwidth, tunable from 1 to 3 MHz. A prototype has been fabricated in a 0.5-um technology and occupies a total area of 0.127 mm2. The VFCOA operates using a 3.3-V supply with static power consumption of 280.5 uW. Measurements for maximum gain configuration show a dynamic range (1% THD@300kHz) of 87.5 dB and a THD lower than -40dB for an output current 23 times the bias current.5 p.application/pdfeng© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.CMOS analog integrated circuitsVoltage feedback operational amplifierCurrent modeClass ABCurrent amplifierArtículo / ArtikuluaAcceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess