Audio apparatus

Details Audio apparatus Audio apparatus

2008-07-27

2011-12-06

Fulk, Steven J (Department: 2891)

Electrical audio signal processing systems and devices

With amplifier

C381S097000

Reexamination Certificate

active

08073161

ABSTRACT:
An audio apparatus includes an input, a first resistor, a first capacitor, an amplifier, a second resistor, a second capacitor, and an output. The input is used for inputting audio signals. The first resistor and the amplifier are serially connected to the input; wherein the first resistor is connected to the inverting input of the amplifier and the non-inverting input of the amplifier is connected to ground. The first capacitor has one end connected to a node between the first resistor and the inverting input of the amplifier, the other end connected to ground. The second resistor has one end connected to a node between the first resistor and the inverting input of the amplifier, the other end connected to the output of the amplifier. The second capacitor is connected between the inverting input and the output of the amplifier. The output is connected to the output of the amplifier, for outputting the audio signals after processing.

REFERENCES:
patent: 4368435 (1983-01-01), Bloy
patent: 4400583 (1983-08-01), Bloy
patent: 5339363 (1994-08-01), Fosgate
patent: 6232833 (2001-05-01), Pullen
patent: 6272328 (2001-08-01), Nguyen et al.
patent: 6680645 (2004-01-01), Greitschus et al.
patent: 7102557 (2006-09-01), Frith

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