Shirin Pourashraf, Jaime Ramírez-Angulo, Antonio J. López-Martín, Ramón González Carvajal, José M. Algueta Miguel. An Op-Amp Approach for Bandpass VGAs With Constant Bandwidth. IEEE Trans. on Circuits and Systems, 65-II(9):1144-1148, 2018. [doi]
Abstract is missing.