The presented oscillator is capable of producing two
quadrature sinusoids. However, in order to obtain the
absolute periodicity, the possible discrete frequencies are
restricted to be rational. The system is fully programmable,and thus the frequency spacing can be easily
changed. According to the simulations, the produced
sinusoidal waves have low spurious components, high
number of samples per cycle, and they can be synthesized
in a wide frequency range.