Power limiter configuration for audio signals
Example embodiments provide a process that includes one or more of receiving an audio signal at a feedback compressor circuit, determining how much to attenuate the audio signal when a power level of the audio signal exceeds a threshold power level, combining the audio signal with an auxiliary attenuation signal from an auxiliary attenuation source and a compressed attenuation signal from the feedback compressor circuit to create a combination signal, and generating an audio output signal of the feedback compressor circuit based on the combination signal.
1. A method comprising:
receiving an audio signal at a feedback compressor circuit;
combining the audio signal with an auxiliary attenuation signal from an auxiliary attenuation source and a compressed attenuation signal from the feedback compressor circuit to create a combination signal; and
generating an audio output signal of the feedback compressor circuit based on the combination signal;
wherein a feedback signal is provided to a low pass filter (LPF) to combine the audio signal with the auxiliary attenuation signal and the compressed attenuation signal to create the combination signal, and wherein the combination signal is combined with the audio signal to generate the audio output signal.
2. The method of claim 1 , wherein the auxiliary attenuation signal comprises a composite of attenuation signals received from a plurality of sensors.
3. The method of claim 2 , wherein the composite of attenuation signals comprises one or more of an excessive heat signal, an excessive output current signal and a power supply voltage sag signal.
4. The method of claim 1 , wherein the combining the audio signal with the auxiliary attenuation signal comprises one or more of multiplying the audio signal by the auxiliary attenuation signal, and converting the auxiliary attenuation signal to the log domain and adding the auxiliary attenuation signal to the compressed attenuation signal.
5. The method of claim 1 , comprising:
filtering the audio output signal via the LPF.
6. The method of claim 5 , comprising:
providing the feedback signal to the LPF prior to combining the auxiliary attenuation signal and the compressed attenuation signal.
7. An apparatus comprising:
a receiver configured to receive an audio signal at a feedback compressor circuit;
a processor configured to
combine the audio signal with an auxiliary attenuation signal from an auxiliary attenuation source and a compressed attenuation signal from the feedback compressor circuit to create a combination signal; and
generate an audio output signal of the feedback compressor circuit based on the combination signal;
wherein a feedback signal is provided to a low pass filter (LPF) to combine the audio signal with the auxiliary attenuation signal and the compressed attenuation signal to create the combination signal, and wherein the combination signal is combined with the audio signal to generate the audio output signal.
8. The apparatus of claim 7 , wherein the auxiliary attenuation signal comprises a composite of attenuation signals received from a plurality of sensors.
9. The apparatus of claim 8 , wherein the composite of attenuation signals comprises one or more of an excessive heat signal, an excessive output current signal and a power supply voltage sag signal.
10. The apparatus of claim 7 , wherein the processor combines the audio signal with the auxiliary attenuation signal by being further configured to perform one or more of multiply the audio signal by the auxiliary attenuation signal, and convert the auxiliary attenuation signal to the log domain and add the auxiliary attenuation signal to the compressed attenuation signal.
11. The apparatus of claim 7 , wherein the processor is further configured to filter the audio output signal via the LPF.
12. The apparatus of claim 11 , wherein the processor is further configured to provide the feedback signal to the LPF prior to the auxiliary attenuation signal and the compressed attenuation signal being combined.
13. A gate array configured to perform:
receiving an audio signal at a feedback compressor circuit;
combining the audio signal with an auxiliary attenuation signal from an auxiliary attenuation source and a compressed attenuation signal from the feedback compressor circuit to create a combination signal; and
generating an audio output signal of the feedback compressor circuit based on the combination signal;
wherein a feedback signal is provided to a low pass filter (LPF) to combine the audio signal with the auxiliary attenuation signal and the compressed attenuation signal to create the combination signal, and wherein the combination signal is combined with the audio signal to generate the audio output signal.
14. The gate array of claim 13 , wherein the auxiliary attenuation signal comprises a composite of attenuation signals received from a plurality of sensors.
15. The gate array of claim 14 , wherein the composite of attenuation signals comprises one or more of an excessive heat signal, an excessive output current signal and a power supply voltage sag signal.
16. The gate array of claim 13 , wherein the combining the audio signal with the auxiliary attenuation signal comprises one or more of multiplying the audio signal by the auxiliary attenuation signal, and converting the auxiliary attenuation signal to the log domain and adding the auxiliary attenuation signal to the compressed attenuation signal.
17. The gate array of claim 13 , wherein the gate array is further configured to perform:
filtering the audio output signal via the LPF.
18. The gate array of claim 17 , wherein the gate array is further configured to perform:
providing the feedback signal to the LPF prior to combining the auxiliary attenuation signal and the compressed attenuation signal.