Patent ID: 6771121
Filing Date: 2004-08-03
Classification: H03F

Abstract:
A circuit to linearize the output pulses in a Class-D Amplifier, comprising:means to convert the input signal into PDM (Pulse Density Modulated) control pulses; means to define a value representing the actual voltage across the output load; means to integrate said value representing said actual voltage across the output load; means to define the output pulse area reference; means to further determine the optimized width of the power driver control pulses, based on said integrated value representing the actual voltage across said output load and said output pulse area reference; means to further generate the time-voltage-area corrected power driver control pulses; means for a Class-D power driver to drive voltage into an output load, controlled by said power driver control pulses; and means for an output load as the amplifier output's target.