Variable frequency sinusoidal oscillators based on CCII/sup +/

Construction of classes of circuit-independent chaotic oscillators using passive-only nonlinear devices

“…1(a) and characterized by having a separate parallel branch supplied by a current from a first-order active network. A large number of classical as well as new sinusoidal oscillators with this structure can be found in the literature [23]- [26]. The parallel network is usually known as the timing network.…”

“…4(a) characterized by having a separate series network, which is also a common feature in many oscillators [23]- [26]. This series network can either be driven by a current , generally given by (3), or by a voltage generally given as .…”

Realization of Sinusoidal Oscillators Using CCs

“…Out of the three circuits derived systematically by Martinez et al [35], through a formulation based upon two integrator loop biquadratic general structure, the two circuits which appear to be the better than the remaining ones are shown here in Fig. 7.20.…”

An Example of Easy Synthesis of Active Filter and Oscillator using Signal Flowgraph Modification and Controllable Current Conveyors

“…There have been published oscillator circuits with the conveyors CCII which are based on single active block and four or five passive elements [40,43,50]. Furthermore circuits with two active blocks and four or six passive elements [36, 38-39, 41, 44-46, 48] and at the most with three CCII and eight passive elements [34,35,38,42,47,49] have been published. The circuits mentioned above were mostly verified through simulations at low frequencies only (kHz) where the use of these high-speed blocks is not substantiated.…”

“…Second example is quite interesting quadrature oscillator obtained by simple modification of the same SFG. Recently, many oscillator conceptions based on the current conveyors have been published, for example [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Some of these applications are not tunable [38, 41 and 42].…”