Hearing aid device with an output amplifier having a...

Details Hearing aid device with an output amplifier having a... Hearing aid device with an output amplifier having a...

2007-04-17

2007-04-17

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000, C341S118000

Reexamination Certificate

active

11355664

ABSTRACT:
In a digital hearing aid device with an output amplifier having a sigma-delta modulator, the output transducer has a high current consumption even when no output signal perceivable as an acoustic output signal is generated. A linear digital filtering in connection with the sigma-delta modulation reduces the number of the high-frequency edges in the (typically) pulse-density-modulated output signal.

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