Dual-mode resistorless sinusoidal oscillator using single CCCDTA
This study proposes a new design for a resistorless second-order sinusoidal oscillator. The proposed circuit uses a single current-controlled current-differencing transconductance amplifier (CCCDTA) and two capacitors to perform the functions of a resistorless sinusoidal oscillator. The proposed oscillator provides a voltage output and a current output simultaneously, and can independently control the oscillation condition and oscillation frequency by using the separate bias currents of the CCCDTA. This study first introduces the CCCDTA and the related formulations of the proposed oscillator circuit, and then presents the non-ideal effects, sensitivity analyses, and design considerations of the proposed circuit. The proposed oscillator features a compact topology and dual-mode operation, including low active and passive sensitivities, and has high potential for integration because it is composed of a single CCCDTA and two capacitors. The HSPICE simulation results in this study confirm the feasibility of the new resistorless oscillator circuit.
sinusoidal oscillator current-controlled current-differencing transconductance amplifier (cccdta) dual-mode circuit resistorless circuit