Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Reexamination Certificate
2004-10-08
2009-12-08
Le, Huyen D (Department: 2614)
Electrical audio signal processing systems and devices
Circuitry combined with specific type microphone or loudspeaker
C381S355000, C341S143000, C341S155000, C341S159000
Reexamination Certificate
active
07630504
ABSTRACT:
The invention relates to a digital microphone comprising an integral analog-to-digital converter based on a multi-level quantizer in cascade with a digital signal converter which is adapted to provide a single-bit output signal. Digital microphones in accordance with the invention are particularly well adapted for use in mobile terminals and compact portable communication equipment such as mobile or cellular phones, headsets, hearing prostheses etc.
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Epcos AG
Le Huyen D
Nixon & Peabody LLP
Robinson Ryan C
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