Low-spurious sinusoidal signal generator based on multi-point compensation scheme
A sine signal and generator technology, applied in the field of signal processing, can solve the problems of low D/A conversion rate and low D/A effective number of digits, and achieve the effect of meeting application requirements
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[0062] The present invention is specifically described as follows in conjunction with specific embodiments:
[0063] For the defects in the prior art, it is necessary to find a signal whose fundamental wave is very small and does not affect the fundamental wave component of the original digitally synthesized sine wave signal after being superimposed, and other harmonics are as close as possible to those of the original digitally synthesized sine wave signal The harmonic components are the same (including amplitude and phase), and the two signals are subtracted and added to cancel.
[0064] According to the digitally synthesized sine wave signal function f(t) of formula (2), the most ideal offset function can be obtained as:
[0065]
[0066] exist interval, there are:
[0067]
[0068] The waveform of ξ(t) is shown as image 3 shown.
[0069] If another D / A truncated step signal is used to simulate ξ(t), its waveform is as follows Figure 4 shown.
[0070] At this t...
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