Method and digital control oscillator for sinusoidal and cosine signal generator
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[0063] The present invention provides a method for generating sine and cosine signals, generates an angle sequence, and performs phase truncation on the generated angle; splits the phase truncated angle into two bits including the highest address, and removes the high address bit of the highest address two bits, Low address bits; calculate the sign of the sine and cosine signal corresponding to the angle by calculating the two bits of the highest address; query the π / 2 sine table and π / 2 cosine table by removing the high address bits of the highest address to get the corresponding sine and cosine values , and the trigonometric function corresponding to the lower address bit is equivalent to the value of the lower address bit; by the value of the sine and cosine value and the lower address bit, the sine and cosine of the angle is obtained by using the finite term Taylor series expansion of the trigonometric function value; the sine-cosine signal of the angle is obtained from the...
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