Patent ID: 7250740

Claim:
A method of generating pulse-width modulated waveforms through a first terminal and a second terminal, the method comprising: the step 1 of determining the cycle of a carrier wave for the waveforms, a first dead time value, and a second dead time value; the step 2 of determining the range of counting by a plurality of up-down counters according to the carrier-wave cycle, the first dead time value, and the second dead time value; the step 3 of counting in the range determined by the up-down counters in the step 2 ; the step 4 of comparing a value determined according to the carrier-wave cycle with a first count value of a first one of the up-down counters; the step 5 of comparing a value determined according to the carrier-wave cycle with a second count value of a second one of the up-down counters other than the first up-down counter; and the step 6 of generating the pulse-width modulated waveforms through the first and the second terminals according to the comparison in the steps 4 and 5 .