Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate
2005-03-30
2010-11-16
Mei, Xu (Department: 2614)
Electrical audio signal processing systems and devices
Circuitry combined with specific type microphone or loudspeaker
With electrostatic microphone
C381S111000, C381S122000, C330S297000
Reexamination Certificate
active
07835531
ABSTRACT:
A microphone system includes a microphone capsule, an audio amplifier and microphone electronics. A phantom power supply provides power to the audio amplifier and the microphone electronics through cable conductors. The microphone system includes a power supply that provides a supply voltage to the microphone electronics, a polarization voltage to the microphone capsule and a supply voltage to the audio amplifier. The power supply includes a constant current generator. The constant current generator operates as a constant current sink for the phantom power supply.
REFERENCES:
patent: 2493819 (1950-01-01), Harry
patent: 3508016 (1970-04-01), Godfrey
patent: 3707091 (1972-12-01), Morris et al.
patent: 4541112 (1985-09-01), Kern
patent: 4543665 (1985-09-01), Sotelo et al.
patent: 4622692 (1986-11-01), Cole
patent: 4893240 (1990-01-01), Karkouti
patent: 5459283 (1995-10-01), Birdwell, Jr.
patent: 5577129 (1996-11-01), Ehara
patent: 5610988 (1997-03-01), Miyahara
patent: 6007228 (1999-12-01), Agarwal et al.
patent: 6198405 (2001-03-01), Andersson et al.
patent: 6236262 (2001-05-01), Mellot
patent: 6427015 (2002-07-01), Backram et al.
patent: 6792121 (2004-09-01), Koyama et al.
patent: 7024155 (2006-04-01), Gosieski, Jr.
patent: 7295675 (2007-11-01), Akino et al.
patent: 20 20 739 (1971-11-01), None
patent: 21 26 385 (1971-12-01), None
patent: 39 33 870 (1991-04-01), None
patent: 39 33 870 (1991-04-01), None
patent: 0 096 778 (1983-05-01), None
patent: 0 096 778 (1983-12-01), None
patent: 0 794 686 (1997-09-01), None
European Search Report for Application No. 04 45 0075.9 dated Jan. 20, 2005.
European Search Report for Application No. 04 45 0074.2 dated Feb. 23, 2005.
AKG Acoustics GmbH
Mei Xu
LandOfFree
Microphone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microphone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microphone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4188727