Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic loudspeaker
Reexamination Certificate
2008-08-22
2011-11-22
Menz, Douglas (Department: 2891)
Electrical audio signal processing systems and devices
Circuitry combined with specific type microphone or loudspeaker
With electrostatic loudspeaker
C381S077000
Reexamination Certificate
active
08064620
ABSTRACT:
The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal, and mixing them by modulation; a digital to analog converter for converting the output of the digital modulation encoder to an analog signal; a transformer for adjusting the voltage amplitude of the analog signal; and a demodulator for demodulating the adjusted analog signal to driver a speaker.
REFERENCES:
patent: 2004/0013274 (2004-01-01), Bellan et al.
Guo Jwin-Yen
Huang Pei-Cheng
Liu Kuo-Chi
Menz Douglas
Richtek Technology Corporation R.O.C.
Tung & Associates
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