Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2006-01-20
2010-06-01
Mottola, Steven J (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
Reexamination Certificate
active
07728659
ABSTRACT:
A pulse-width modulation (PWM) amplifier comprises a feedback loop for reshaping the pulses of the PWM input signal to correct timing and amplitude errors in the class D output stage of the amplifier by means of an error correction signal. In such an amplifier the feedback loop gives a substantial amount of base-band noise when the pulse-period of the PWM input signal is not constant, which is especially the case when the PWM signal originates from a noise shaper. The invention reduces this noise by modifying the reshaping gain of the amplifier with a pulse-period proportional signal.
REFERENCES:
patent: 4600891 (1986-07-01), Taylor, Jr. et al.
patent: 5815581 (1998-09-01), Andersson
patent: 6107875 (2000-08-01), Pullen et al.
patent: 6404280 (2002-06-01), Jeng
patent: 6466087 (2002-10-01), Ruha
patent: 6504427 (2003-01-01), Midya et al.
patent: 6768779 (2004-07-01), Nielsen
patent: 2001/0043152 (2001-11-01), Kishida
patent: 2002/0180518 (2002-12-01), Midya et al.
patent: 2004/0066229 (2004-04-01), Taura et al.
patent: 1429454 (2004-06-01), None
patent: WO9844626 (1998-10-01), None
patent: WO9844626 (1998-10-01), None
patent: WO2004049560 (2004-06-01), None
patent: WO2004091096 (2004-10-01), None
Dooper Lutsen L. A. H.
Nuijten Petrus A. C. M.
Mottola Steven J
NXP B.V.
LandOfFree
Arrangement for amplifying a PWM input signal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement for amplifying a PWM input signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for amplifying a PWM input signal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4180136