Figure 1.The error between the ideal and the generated
waves when the used correction method is: (a) no
correction, (b) reset at every N cycles, (c) reset at
every N/4 cycles, (d) one extra coefficient pair, (e)
reset at every N/4 cycles and one extra coefficient
pair, (f) two extra coefficients pairs, (g) reset at
every N/4 cycles and two extra coefficients pairs.