Self-biased amplifier device for an electrecret microphone

Details Self-biased amplifier device for an electrecret microphone Self-biased amplifier device for an electrecret microphone

2008-11-20

2011-11-22

Thai, Luan C (Department: 2891)

Electrical audio signal processing systems and devices

With amplifier

C381S122000, C381S121000

Reexamination Certificate

active

08064622

ABSTRACT:
A self-biased electrecret microphone amplifier with phantom biasing is using only standard devices implemented in a digital Complementary Metal Oxide Semiconductor (CMOS) process. The stable gain is provided open loop with a self-biased linear transconductance amplifier device that does not require large external components for filtering.

REFERENCES:
patent: 6160450 (2000-12-01), Eschauzier et al.
patent: 6456155 (2002-09-01), Takai
patent: 6788143 (2004-09-01), Chen
patent: 6888408 (2005-05-01), Furst et al.

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