Microphone amplification arrangement and integrated circuit...

Details Microphone amplification arrangement and integrated circuit... Microphone amplification arrangement and integrated circuit...

2005-07-21

2011-12-27

Bryant, Kiesha (Department: 2891)

Electrical audio signal processing systems and devices

With amplifier

C381S118000

Reexamination Certificate

active

08085954

ABSTRACT:
A microphone amplifier arrangement comprises at least one microphone input connected to a dual output microphone pre-amplifier having an input resistance comprising a first resistance and a second resistance in a first voltage-to-voltage mode of operation, and only the second resistance in a second current-to-voltage mode of operation. A first output is operably coupled to a first feedback path comprising a V2V feedback resistor; and a second output is operably coupled to a second feedback path comprising an I2V feedback resistor. In this manner, the microphone amplifier arrangement is arranged to support both a V2V microphone amplifier and a low-noise I2V microphone amplifier.

REFERENCES:
patent: 2342822 (1944-02-01), Rumpel
patent: 4110692 (1978-08-01), Pradal et al.
patent: 5202918 (1993-04-01), White et al.
patent: 5218642 (1993-06-01), Chin-Fa
patent: 2006/0044961 (2006-03-01), Jin
patent: 2006/0261892 (2006-11-01), Sutardja
patent: 0756374 (1997-01-01), None

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