Transmission facility for a hearing apparatus with film conductor shielding and naturally shielded coil

• US 8,379,898 B2
• Filed: 09/04/2008
• Issued: 02/19/2013
• Est. Priority Date: 09/07/2007
• Status: Active Grant

• Current Assignee: Sivantos Pte. Ltd. (WS Audiology A/S)
• Original Assignee: Siemens Medical Instruments Pte Ltd (WS Audiology A/S)
• Inventors: Nikles, Peter, Rckerl, Gottfried, Schtzle, Ulrich
• Primary Examiner(s): Ni, Suhan
• Application Number:
  US12/231,665
• Publication Number:
  US 20090067649A1
• Time in Patent Office: 1,629 Days
• Field of Search: 381/312, 381314-316, 381/331, 607 55- 57, 379/52, 379/55.1, 379/430
• US Class Current: 381/331
• CPC Class Codes: H01Q 1/273 Adaptation for carrying or wearing by persons or animals
• CPC Class Codes: H04R 1/10 Earpieces; Attachments therefor ; Earphones; Monophonic headphones H04R1/28 takes precedence; stereophonic headphones H04R5/033
• CPC Class Codes: H04R 2225/49 Reducing the effects of electromagnetic noise on the functioning of hearing aids, by, e.g. shielding, signal processing adaptation, selective (de)activation of electronic parts in hearing aid
• CPC Class Codes: H04R 2225/51 Aspects of antennas or their circuitry in or for hearing aids
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones
• CPC Class Codes: H04R 25/554 using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Abstract

Hearing apparatuses with transmission facilities for the wireless transmission are to be miniaturized further. A transmission facility for a hearing apparatus and in particular a hearing device with an oscillating circuit including a capacitor and a coil as well as an electrical line is provided in or to the oscillating circuit, with the electrical line having a shielding. The electrical line includes a film conductor with a signal line and shielding line, the shielding capacitance of which is connected in parallel to the capacitor of the oscillating circuit. The shielding capacitance can be used together with the capacitance of the capacitor in a targeted fashion as an oscillating circuit capacitance. In this way, the parasitic shielding capacitance is used as a wanted capacitance. As the shielding capacitance of the film conductor is only subjected to minimal fluctuations, it only requires a small tuning capacitor for tuning the oscillating circuit.

Claims

1. A transmission unit for a hearing apparatus, comprising:

an oscillating circuit comprising a capacitor and a coil;

an electrical supply line arranged in the oscillating circuit comprising a film conductor;

a signal line arranged in the electrical supply line; and

a shielding line arranged in the electrical supply line comprising a shielding capacitance connected in parallel to the capacitor to form an oscillating circuit capacitance,

wherein a variable tuning capacitor integrated in a semiconductor chip is connected to the capacitor.

2. The transmission unit as claimed in claim 1, wherein the coil comprises a natural shielding formed by a wire winding.

3. The transmission unit as claimed in claim 2, wherein the wire winding comprises a first wire end and a second wire end.

4. The transmission unit as claimed in claim 3, wherein the wire winding is formed in one layer in an axial direction starting at the first wire end.

5. The transmission unit as claimed in claim 4, wherein a wire section on the second wire end is guided as a shield directly over the wire winding opposite to the axial direction.

6. The transmission unit as claimed in claim 5, wherein the wire section is wound with fewer windings than the wire winding.

7. The transmission unit as claimed in claim 1, wherein the signal line and the shielding line are short-circuited at one end of the electrical supply line.

8. The transmission unit as claimed in claim 1, wherein the film conductor comprises a conductor layer for the signal line and the shielding line.

9. The transmission unit as claimed in claim 8, wherein the conductor layer is laterally discontinued.

10. The transmission unit as claimed in claim 1, wherein the film conductor comprises a plurality of conductor layers for the signal line and the shielding line.