Method and apparatus to reduce communication device peak current

A method and apparatus to reduce communication device peak current for alert tones are disclosed. A portable device may include a processor coupled to a transceiver, a current limit trigger circuit, and an alert tone current limit controller. The transceiver may be configured to process an audio sig...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Syed Isa Syed Idrus, Wai Mun Lee, Muhamad Noorazuan Fakhir Md Dali, Yee Boon Fu, Peter J. Bartels
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A method and apparatus to reduce communication device peak current for alert tones are disclosed. A portable device may include a processor coupled to a transceiver, a current limit trigger circuit, and an alert tone current limit controller. The transceiver may be configured to process an audio signal representing an alert tone. The processor may be configured to determine whether the transceiver is in a transmit state and whether an audio volume level setting exceeds a threshold. In response, the current limit trigger circuit may be configured to activate the alert tone current limit controller that may include a voltage scale controller configured to generate a reduced audio signal by adjusting a peak-to-peak amplitude of the audio signal representing the alert tone and an alert tone amplitude modulator configured to generate an adjusted audio signal by restricting the maximum amplitude of the reduced audio signal.