Composite Second Generation Current Conveyor Based Tunable MOS-C Quadrature Sinusoidal Oscillator Design and Comparative Performance Analysis

摘要

In this paper, a new voltage mode tunable MOS-C quadrature sinusoidal oscillator circuit employing composite second-generation current conveyor (CCCII) is presented. The proposed topology employs two CCCII and four grounded components. CCCII is implemented by using two CCIIs as sub-circuit. This implementation technique makes it possible to employ the circuit by commercially available integrated circuits that can be used as current conveyor such as AD844. The validity of the proposed circuit is verified by PSPICE simulation program. Simulation is performed for both CMOS based CCCII using MOSIS 0.35 μm process parameters and AD844 based CCCII using the Spice Macromodel parameters of AD844. It is seen that the simulation results agree well with the theoretical analysis and the proposed circuit achieves a good THD performance. The resistors used in the circuit are implemented by using MOS transistors. So, the proposed circuit is fully integrable and oscillation frequency can be tuned by external MOS gate voltages. Also, a comparative performance analysis is performed for the two circuits employing CCII and CCCII which are belong to the same topology. It is stated that employing CCCII improve the circuit performance significantly when compared to the same topology employing CCII for both CMOS and AD844 based implementations.