Audio amplifier with output power limiter

Amplifier with a power supply for amplifying several audio signals, said amplifier comprising:

• a current sensing element for sensing a current in a current path of said power supply,
• a detecting circuit responsive to said current sensing element, and
• voltage reducing means for reducing the signal amplitude of at least one of said audio signals in response to said detecting circuit, wherein said voltage reducing means are arranged each between a preamplifier and a power amplifier.

Amplifier with a power supply for amplifying several audio signals, said amplifier comprising:

• a current sensing element for sensing a current in a current path of said power supply,
• a detecting circuit responsive to said current sensing element, and
• voltage reducing means for reducing the signal amplitude of at least one of said audio signals in response to said detecting circuit, wherein a positive and a negative voltage limit is applied to the signal path of said audio signals by said voltage reducing means, said voltage reducing means comprise resistors and diodes via which a positive and a negative supply voltage for said preamplifiers are coupled to said signal path, and said detection circuit is arranged such that in case the current in the current path of the power supply is above a predefined threshold, said supply voltages applied to said signal path are reduced in correspondence to the current in said current path.

Amplifier with a power supply for amplifying several audio signals, said amplifier comprising:

• a current sensing element for sensing a current in a current path of said power supply,
• a detecting circuit responsive to said current sensing element, and
• voltage reducing means for reducing the signal amplitude of at least one of said audio signals in response to said detecting circuit, wherein said current sensing element is a resistor for sensing the current in the current path of said power supply, and said detecting circuit is a voltage detection circuit in parallel to said resistor.

Amplifier with a power supply for amplifying several audio signals, said amplifier comprising:

• a current sensing element for sensing a current in a current path of said power supply,
• a detecting circuit responsive to said current sensing element, and
• voltage reducing means for reducing the signal amplitude of at least one of said audio signals in response to said detecting circuit, wherein said power supply comprises a supply voltage generation circuit for power amplifiers, and that said resistor is a current detecting resistor coupled between said supply voltage generation circuit and supply voltage inputs of said power amplifiers.

Amplifier with a power supply for amplifying several audio signals, said amplifier comprising:

• a current sensing element for sensing a current in a current path of said power supply,
• a detecting circuit responsive to said current sensing element, and
• voltage reducing means for reducing the signal amplitude of at least one of said audio signals in response to said detecting circuit, wherein the amplifier is a surround sound amplifier with several audio channels in parallel.