Electroacoustic transducer with built in transducer circuit
View Patent ↗In an electroacoustic transducer ( 1 ), an annular shaped magnet system ( 14 ) is provided, enclosing an inner space ( 22 ), in which inner space ( 22 ) an integrated circuit ( 31 ) is accommodated, with the aid of which integrated circuit ( 31 ) an electrical signal to be sent to a moving coil ( 29 ) of transducer ( 1 ) can be amplified.
1. An electroacoustic transducer
with a transducer axis and
comprising a membrane, which membrane is arranged perpendicular to the transducer axis so as to be oscillatory, wherein the membrane includes an intermediate area adjacent to a U-shaped peripheral area and an annular securing area adjacent to the intermediate area, and a central area located within the annular securing area, said central area serves for sound generation, and
comprising a magnet system, which magnet system is equipped with two magnet-system components, which magnet-system components bound an air gap, and
comprising a moving coil, which moving coil is, in part, arranged in the air gap and is connected to the membrane, and
comprising a circuit module, which circuit module is equipped with a circuit frame and one single circuit component which forms a transducer circuit, the one single circuit component mounted on the circuit frame, the one single circuit component being an integrated circuit connected to the circuit frame,
wherein the magnet system is arranged in an annular shape and encloses an inner space, which inner space is accessible from outside the magnet system during production of the transducer and before the circuit module is mounted, and
wherein the at least one circuit component is arranged on a first carrier surface of the circuit frame which first carrier surface faces the membrane, and in the inner space of the magnet system.
2. An electroacoustic transducer as claimed in claim 1 , wherein the integrated circuit is embedded in a plastic jacket and wherein two connection contacts are provided on the plastic jacket, each of which connection contacts is connected to a moving-coil contact.
3. An electroacoustic transducer as claimed in claim 1 , wherein four connecting contacts, each having the shape of an annular sector, are provided on a second carrier surface of the circuit frame which second carrier surface faces away from the membrane.
4. An electroacoustic transducer as claimed in claim 1 , wherein the circuit module is of a design that can be removed without separate tools.
5. An electroacoustic transducer as claimed in claim 1 , wherein the transducer has a pot-shaped housing wherein, in the direction of the transducer axis, its height has a value between 2.0 mm and 5.0 mm and its diameter perpendicular to the direction of the transducer axis has a value between 6.0 mm and 20.0 mm.