The reduction of the pulses contributes to suppression of power source harmonics.

Provided is an alternating current-direct current converting apparatus which can improve a power factor by suppressing a harmonic current at low cost.

The device also includes a harmonic suppression layer 110 at a boundary of the BOX layer 104 and the high-resistivity silicon layer 102.

The use of a film capacitor improves the power factor of the circuit, helps to eliminate the introduction of harmonics into the AC voltage source, and helps in mitigating EMI.

At low tuning frequencies, all available mixers are programmed with unique coefficients and driven by different LO clock phases to achieve maximum harmonic suppression.