A, multifrequency range digital sinusoidal oscillator with high resolution and uniform frequency spacing
Mohammad M. Al-Ibrahim · IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing · 2001
In this work, a high-resolution and multifrequency range complex digital sinusoidal oscillator with uniform frequency spacing is proposed and its performance is evaluated. The proposed oscillator structure is capable of generating both the real and imaginary components of a complex exponential digital signal. The proposed oscillator utilizes two integrators with adjustable gains and two multipliers and can be implemented on already available digital signal processors. The frequency resolution of the proposed oscillator is shown to be adjustable and is superior to that of the direct-form digital oscillator. Simulation results are presented to verify the analysis and demonstrate the quality of the generated sinusoids measured in terms of total harmonic distortion.