| 摘要 |
<p>An electrostatic loudspeaker electrode (14, fig 1) comprises one or more annular conducting regions 22-1...22-N and a conducting central region 20 electrically isolated from each other. The delay line circuit 60 comprises a plurality of sections, each section arranged to produce a voltage for a respective one of the annular conducting regions 22-1...22-N of the electrode. Each section of the delay line includes an inductor and for each section an output connection with the corresponding respective annular conducting region 22-1...22-N of the electrode (14) is taken from a tapped point, for example a centre tapped point, of the inductor. One or more of the sections may further comprise a capacitor. Also a drive circuit 50, comprising two such delay line circuits 60, is disclosed for driving an electrostatic loudspeaker (1), in which inductors in respective sections of the delay line may share a common core..</p> |
