Voltage differencing current conveyor based linearly controllable quadrature oscillators

This paper presents two new applications of modified version of the voltage differencing current conveyor (VDCC) active device in electronically linearly controllable quadrature oscillators. In this particular case, VDCC element is modified in such a way that it uses electronically adjustable current gain controlled independently in each of output current branches of this device. Brief Spice simulation tests based on emulators of VDCC employing commercially available subparts and including system for amplitude stabilization are also presented. Results confirmed expected behavior.