Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2006-07-28
2008-12-09
Pascal, Robert (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S20700P
Reexamination Certificate
active
07463089
ABSTRACT:
A fully differential class D amplifier is provided. The class D amplifier includes an active amplifier in the feedback path of the modulator. In one embodiment, the class D amplifier includes a fully differential amplifier as an input buffer, in which a supply-independent reference voltage is used as the common mode voltage of the output of the fully differential amplifier. In one embodiment, the class D amplifier includes a pulse width modulation circuit that includes rail-to-rail comparators.
REFERENCES:
patent: 6507223 (2003-01-01), Felder
patent: 6937091 (2005-08-01), Tanaka et al.
U.S. Appl. No. 11/460,931, filed Jul. 28, 2006, Sumant Bapat et al.
LM4871 Boomer, “3W Audio Power Amplifier with Shutdown Mode,” National Semiconductor Corporation, pp. 1-16, Jan. 2003.
LM4671 Boomer, “Filterless High Efficiency 2.5W Switching Audio Amplifier,” National Semiconductor Corporation, pp. 1-18, Mar. 2005.
Bapat Sumant
Bhatt Ansuya
Heithoff Christopher B.
Singh Raminder Jit
Darby & Darby PC
Gaffney Matthew M.
National Semiconductor Corporation
Nguyen Kheim D
Pascal Robert
LandOfFree
Class D audio power amplifier for mobile applications 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 audio power amplifier for mobile applications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Class D audio power amplifier for mobile applications will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4046842