Patent ID: 7158646

Claim:
An audio signal derived bias supply for use with an electrostatic loudspeaker having at least two stators and a diaphragm, comprising: (a) at least one transformer, adapted to receive an audio signal, and having a primary winding, and primary connection taps; (b) a secondary winding, magnetically coupled to the primary winding, having at least three secondary connection taps including a center tap, wherein the at least two stators are connected to at least two secondary connection taps that are main audio output taps; (c) a bias circuit, connected to at least three secondary connection taps, having a bias return to the center tap, wherein the bias circuit biases the diaphragm, the bias circuit further comprising: (i) at least one rectification unit with at least two rectifiers; and (ii) at least one voltage limiter, coupled to the rectifier.