A precise 90° quadrature OTA-C oscillator tunable in the 50-130-MHz range.
Bernabé Linares-BarrancoTeresa Serrano-GotarredonaJ. Ramos-MartosJ. Ceballos-CáaceresJ. M. Mora-MerchanAlejandro Linares-BarrancoPublished in: IEEE Trans. Circuits Syst. I Regul. Pap. (2004)