| 主权项 |
1. A method for regulating an adaptive rail-voltage in an audio amplifier, the method comprising,
receiving a digital audio signal by a Digital Signal Processing module, converting the digital audio signal to an analog audio signal and feeding the analog audio signal into the audio amplifier; in the Digital Signal Processing module detecting the level of the digital audio signal and based on the digital audio signal level analyzing the rail-voltage requirement for the audio amplifier to amplify the analog audio signal without voltage clipping; in accordance with the rail voltage requirements sending a control signal from the Digital Signal Processing module to a Power Supply Unit, the control signal causing adjustment of the rail voltage in the audio amplifier by the Power Supply Unit; delaying the digital audio signal by the Digital Signal Processing module prior to transforming and feeding it into the audio amplifier for amplification, wherein the delay is of a first predetermined time length (S_delay) sufficiently long for the Power Supply Unit to stabilize the rail voltage after adjustment of the rail voltage to an increased level; delaying an adjustment of the of the rail voltage to a reduced level, as a consequence of the detection of a reduced level of the digital audio signal, by a second predetermined time length (S_Hold) of 1 to 5 seconds in order to reduce the number of adjustments of the rail voltage. |
