Patent ID: 6166568
Filing Date: 2000-12-26
Classification: G06F,H03B

Abstract:
A digital oscillator for generating a first digital sinusoidal signal and a second digital sinusoidal signal, both signals having in common a predetermined oscillation frequency and a predetermined sampling frequency and having a phase difference of .pi./2 radians between them, the oscillator comprising:signal generating means for generating a third digital sinusoidal signal, wherein the signal generation means includes delay means;phase shifting means connected to the signal generating means for receiving the third digital sinusoidal signal and deriving a fourth digital sinusoidal signal, and for deriving a fifth digital sinusoidal signal from the third digital sinusoidal signal, the derived signals having a phase difference between them;orthogonalization means for producing the first digital sinusoidal signal and the second digital sinusoidal signals by forming predetermined linear combinations of the fourth digital sinusoidal signal and the fifth digital sinusoidal signal.