发明名称 |
CLASS D HEARING AID AMPLIFIER |
摘要 |
<p>A sub-miniature power amplifier for hearing aids configured to be completely selfcontained and to fit within the user's ear features a Class D amplifier stage providing a peak-to-peak output voltage greater than the power supply voltage. By configuring all signal elements as digital units, circuit balance is readily maintained. A substantial economy of battery drain is achieved while preserving a low value of distortion at low signal levels. Oscillator frequency is governed by a single resistance element. The amplifier and an optional efficiency-improving inductor can be accommodated entirely within the residual volume of the motor chamber of a state-of-the-art earphone housing. Pulse feedback networks are provided to achieve positive stable latching of each output pulse throughout its duration without producing significant pulse duration distortions.</p> |
申请公布号 |
CA1250362(A) |
申请公布日期 |
1989.02.21 |
申请号 |
CA19860509272 |
申请日期 |
1986.05.15 |
申请人 |
INDUSTRIAL RESEARCH PRODUCTS, INC. |
发明人 |
KILLION, MEAD C. |
分类号 |
H04R25/04;H03F3/217;H03K3/354;H04R25/00;(IPC1-7):H03F3/217 |
主分类号 |
H04R25/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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