Patent ID: 8175294
Filing Date: 2012-05-08
Classification: H04R

Abstract:
1. An electrostatic loudspeaker system comprising: an electrically conductive front stator, an electrically conductive diaphragm, an electrically conductive back stator, one or several electrically isolated spacers to maintain a substantially controlled distance between said diaphragm and stators over their surface area, a first and second capacitor, a first and second resistor and a bias power supply, wherein: said stators have a substantially distributed open area to pass sound waves through, the front stator is connected to a safe reference potential, the first and second capacitors are connected in series between the front stator and the back stator, the diaphragm is connected through the first resistor to the junction of said first and second capacitors, the bias power supply is referenced to the front stator and provides a DC bias voltage through the second resistor to the junction of said first and second capacitors, the audio driver signal is supplied to the back stator, and the audio driver signal is supplied from a directly coupled single ended source referenced to said front stator, or by an indirectly coupled source by means of a transformer or any other indirect coupling method.