A Current-mode Phase-shifted Multicarrier PWM based on Commercially Available IC

This research presents a current-mode phase-shifted multicarrier PWM circuit designed by the commercially available ICs (LM13700 and AD844) and grounded capacitor of a current-mode multi-phase triangular wave generator and a current-mode comparator circuit. An external DC current can electrically control the amplitude of the output signal. Experimental results confirm the theoretical analysis. The maximum error of amplitude is 1.33%. Moreover, the amplitude is independent of temperature.