Electrostatic transducer, driving circuit of capacitive...

Details Electrostatic transducer, driving circuit of capacitive... Electrostatic transducer, driving circuit of capacitive...

2011-03-01

2011-03-01

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic loudspeaker

C381S191000, C381S111000, C381S306000

Reexamination Certificate

active

07899197

ABSTRACT:
Provided is an electrostatic transducer which is driven by a boosted driving signal by boosting a modulated signal obtained by modulating a carrier wave with an acoustic signal in an audio frequency band, the transducer including: an output transformer T which connects the electrostatic transducer to a secondary side winding thereof in parallel and boosts the modulated signal; and a resistor R and a coupling capacitance C1connected in series to a primary side winding of the output transformer T, wherein a circuit constant of a primary side circuit of the output transformer T including a serial circuit of the resistor R and the coupling capacitance C1and a circuit constant of a secondary side circuit of the output transformer including a self-inductance L2and a load capacitance CL of the secondary side winding of the output transformer T are set such that a resonance frequency f0of a circuit formed by the self-inductance L2of the secondary side winding of the output transformer T and the load capacitance CL(F) of the electrostatic transducer is matched or approximately matched to a carrier wave frequency fc of the electrostatic transducer.

REFERENCES:
patent: 2262406 (1941-11-01), Rath
patent: 3007046 (1961-10-01), Schultz
patent: 2005/0149338 (2005-07-01), Fukui
patent: 61-289800 (1986-12-01), None
patent: 01-160199 (1989-06-01), None
patent: 06-209499 (1994-07-01), None
patent: 2001-086587 (2001-03-01), None

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