Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2011-08-09
2011-08-09
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
C330S20700P
Reexamination Certificate
active
07994857
ABSTRACT:
A switching amplifier including a voltage sensor circuit connected to a high voltage supply rail for measuring the power supply voltage. A current sensor circuit is connected to the high voltage supply rail for measuring the power supply current. An error amplifier is connected to the switching amplifier and receives one or more values based on the measurements taken by the voltage sensor and current sensor, and the error amplifier produces an error signal when a predetermined power limit is exceeded. A signal limiting circuit is connected to the error amplifier and the switching amplifier and limits the output power to rated power at any rated load impedance when the error amplifier produces the error signal. This switching amplifier is capable of automatically limiting output power at rated power into all rated load impedances, and dynamically reacts to the frequency-dependant impedance of a typical audio system.
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Albers Mark D.
Baker David Dean
Strickland James C.
Nguyen Khanh V
Rockford Corporation
Steptoe & Johnson LLP
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