Patent ID: 7224728
Filing Date: 2007-05-29
Classification: H03M

Abstract:
1. A pulse width modulator for converting a pulse code modulated data train to produce a pulse width modulation signal, comprising: a first unit for calculating, from a first sample value and a second sample value adjacent to each other in said pulse code modulated data train, a weighting factor W taking on a larger value as said first sample value and said second sample value take on large positive values; a second unit for interpolating said first sample value and said second sample value with said weighting factor to determine a linearly interpolated value; and a third unit for producing a pulse width modulation signal in accordance with said linearly interpolated value, wherein said second unit determines said linearly interpolated value Xp through following computational processing, in accordance with said first sample value X 1 , said second sample value X 2 , and said weighting factor W.