发明名称 |
Low power, low noise, 3-level, H-bridge output coding for hearing aid applications |
摘要 |
A hearing aid (5) has a SIGMADELTA delta modulator (26) that receives an input data stream (18) and produces a SIGMADELTA modulated output data stream, having three states {+1,0,-1}. An H-bridge (28) receives the SIGMADELTA modulated output data stream and produces an output signal for delivery to an associated acoustic transducer (24). A circuit (30) is provided between the SIGMADELTA modulator (26) and the H-bridge (28) to force the SIGMADELTA modulated data stream to return to a zero state as part of each non-zero output period in the SIGMADELTA modulated data stream. A differential oscillator (34) having a differential oscillator output signal clocks a differential latch (32) to provide a differentially latched output to the H-bridge (28).
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申请公布号 |
US2003081803(A1) |
申请公布日期 |
2003.05.01 |
申请号 |
US20010682909 |
申请日期 |
2001.10.31 |
申请人 |
PETILLI EUGENE M.;HOCHSCHILD JAMES R. |
发明人 |
PETILLI EUGENE M.;HOCHSCHILD JAMES R. |
分类号 |
H03K7/08;H04R25/00;(IPC1-7):H04R25/00 |
主分类号 |
H03K7/08 |
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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