Three-phase digital-signal generator sweeps frequency

摘要

Many power ICs use frequency jitter, which spreads a con-rntrol signal's spectrum, to control EMI (electromagnetic interference). If you need to add frequency jitter to power ICs that control three-phase signals, you can use an FPGA and the code in this Design Idea, The digital three-phase signal sweeps over a 20-kHz range of 100 to 120 kHz and back in 40 steps in 500 msec(Figure 1).