Second Order Current-mode Quadrature Oscillators Using OTAs

摘要

This article presents new current-mode quadrature oscillator circuits using OTA which are designed from block diagram. The proposed circuits consist of three OTAs and two grounded capacitors. The circuits have high output impedance appropriate for cascade connection application in current mode technique which is capable to directly drive load. The oscillators use only grounded capacitor which is very appropriate for further development into an integrated circuit. In addition, the condition of oscillation can be adjusted orthogonally from the frequency of oscillation. The results of PSPICE simulation program are corresponding to the theoretical analysis.%W artykule opisano nowy prądowy generator wykorzystujący OTA - operacyjny transkonduktancyjny wzmacniacz. Układ składa się z trzech wzmacniaczy I dwóch uziemionych kondensatorów. Obwód ma dużą impedancję wyjściową.