Patent ID: 7822214
Filing Date: 2010-10-26
Classification: H03G,H04R

Abstract:
1. An audio reproduction circuit comprising: a pair of channel power driver stages each having a corresponding channel driver output; a stereo transducer circuit having first and second transducers for transforming associated channel electrical signals to audible sound, wherein said first and second transducers are connected in series by commonly connected terminals of opposing polarity, and wherein the commonly connected terminals are further coupled through a capacitor to a DC supply point of said pair of power driver stages; and a pair of audio signal processing circuits, each associated with one of said pair of channel power driver stages and having an output coupled to an input of the associated channel power driver stage and an input for receiving a corresponding one of a pair of channel signals, wherein said audio signal processing circuits increase a difference between said pair of corresponding channel signals and provide signals with said increased difference to said channel power driver stages, wherein said pair of audio signal processing circuits increase said difference more for lower-frequency components of said corresponding channel signals than for higher-frequency components of said corresponding channel signals, according to a frequency-dependent characteristic of said difference increase, and wherein said frequency-dependent characteristic is substantially equal to an inverse of a frequency-dependent reduction in a separation of said associated channel electrical signals rendered by said first and second transducers due to a frequency-dependent impedance of said capacitor.