Amplifiers – Miscellaneous – Amplifier protection means
Reexamination Certificate
2007-07-10
2007-07-10
Nguyen, Patricia (Department: 2817)
Amplifiers
Miscellaneous
Amplifier protection means
C330S251000
Reexamination Certificate
active
11170440
ABSTRACT:
A Class D amplifier receives an input signal and comprises a crossing detector and a signal generator that generates first and second periodic signals. Each period of the first periodic signal comprises first and second intervals, and each period of the second periodic signal comprises third and fourth intervals. The first periodic signal monotonically increases during the first interval and monotonically decreases during the second interval, the second periodic signal monotonically decreases during the third interval and monotonically increases during the fourth interval. The first and third intervals are substantially aligned, and the second and fourth intervals are substantially aligned. The crossing detector generates a first transition signal when a voltage of the first periodic signal or second periodic signal transitions in a first direction across a voltage of the input signal.
REFERENCES:
patent: 4404511 (1983-09-01), Nola
patent: 4415862 (1983-11-01), Kunugi
patent: 4584566 (1986-04-01), Arcara
patent: 4791341 (1988-12-01), Brown et al.
patent: 5077539 (1991-12-01), Howatt
patent: 5204809 (1993-04-01), Andersen
patent: 5479337 (1995-12-01), Voigt
patent: 5617058 (1997-04-01), Adrian et al.
patent: 6049473 (2000-04-01), Jang et al.
patent: 6348781 (2002-02-01), Midya et al.
patent: 6362986 (2002-03-01), Schultz et al.
patent: 6430220 (2002-08-01), Determan
patent: 6552607 (2003-04-01), Danielson
patent: 6847257 (2005-01-01), Edwards et al.
patent: 6922101 (2005-07-01), Bayko
patent: 0564490 (2001-04-01), None
patent: WO 92/12572 (1992-07-01), None
patent: WO 97/18626 (1997-05-01), None
patent: WO 02/25817 (2002-03-01), None
patent: WO 03/043184 (2003-05-01), None
Nielsen K., “Parallel Phase Shifted Carrier Pulse Width Modulation (PSCPWM)- A Novel Approach To Switching Power Amplifier Design.” Journal Of The Audio Engineering Society, Audio Engineering Society, Mar. 22, 1997:1-26.
Official Communication from the European Patent Office dated Dec. 15, 2005 for Application No. 04 011 557.8 - 2215; 4 pages.
Marvell World Trade Ltd.
Nguyen Patricia
LandOfFree
Class D amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Class D amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Class D amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3786794