Amplification Circuit and Hearing Aid
AssigneeEtymotic Research, Inc.
InventorsWilliam A. Johnson, Mead C. Killion
Life of this patent
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Abstract
Certain embodiments of the present technology provide improved amplification circuits and hearing aids that can utilize such amplification circuits. In an embodiment, for example, an amplification circuit includes: a first sub circuit configured to create a voltage drop when a supply voltage is above a first voltage; and a second sub circuit configured to create a reverse voltage drop when the supply voltage is below a second voltage, wherein the first and second sub circuits operate to maintain idling current within a range. Certain embodiments of the present technology also provide hearing aids that include removable dampers.
Claims23
An amplification circuit comprising:
- a first sub circuit configured to create a voltage drop when a supply voltage is above a first voltage;
- and
- a second sub circuit configured to create a reverse voltage drop when the supply voltage is below a second voltage,
- wherein the first and second sub circuits operate to maintain idling current within a range.
A method for maintaining idling current of an amplification circuit within a range, the method comprising:
- creating a voltage drop when a supply voltage is above a first voltage;
- and
- creating a reverse voltage drop when the supply voltage is below a second voltage.
A hearing aid comprising:
- a housing;
- a microphone configured to convert ambient sound into electrical signals;
- an amplification circuit configured to process electrical signals received from the microphone;
- a receiver configured to convert processed signals received from the amplification circuit into sound;
- and
- a removable damper configured to smooth the frequency response of sound provided by the receiver.
Dependencies are inferred from the claim text.