Patent ID: 6816007
Filing Date: 2004-11-09
Classification: H03F

Abstract:
A dynamic rail controller for use with an audio amplifier disposed to receive a continuous input audio signal for amplification with an amplified output audio signal to be provided to a selected load with the amplifier being powered by a modulated rail voltage generated by a rail voltage modulator, said dynamic rail controller comprising:a frequency crossover disposed to receive and continuously monitor the input audio signal as received to identify one of a plurality of predefined audio frequency bands within which a frequency of the input audio signal fits and for the duration of the frequency of the input audio signal within each of said predefined audio frequency bands the frequency cross over generates a different continuous band identifying signal that corresponds to the audio frequency band in which the frequency of the audio input signal fits; and a plurality of switching devices each coupled to receive a different one of said continuous band identifying signals, and each switching device when a corresponding continuous band identifying signal is present, provides a signal having a level related to a desired compensation for the amplified output signal portions that fall within the corresponding frequency band.