公开(公告)号：WO2017081571A1

公开(公告)日：2017-05-18

申请号：PCT/IB2016/056412

申请日：2016-10-25

Applicant: ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Inventor： ROMEO, Giovanni

IPC: H03F3/187 ,  H03F3/45 ,  H03F1/56 ,  H04R3/00

CPC classification number: H03F3/187 ,  H03F1/56 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/321 ,  H03F2200/387 ,  H03F2200/435 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2203/45138 ,  H04R3/002 ,  H04R3/007 ,  H04R2400/00

Abstract: The invention relates to a device (12) for amplifying audio signals, comprising an amplifier (121) adapted to receive a first signal as input and to output a second signal capable of powering a loudspeaker (R L ), control means (122) configured for detecting the current and voltage of the second signal and for controlling said amplifier on the basis of the voltage of the first signal and of selection information (k) that allows selecting whether the amplifier (121) is also driven on the basis of the voltage or current of the second signal, tuning means (123) configured for changing the output impedance of the device (12) so that, when the first audio signal has constant frequency and voltage, the voltage of the second signal will be independent of the selection information (k) used by the control means for controlling said amplifier (121).

Abstract translation: 本发明涉及一种用于放大音频信号的设备（12），包括适于接收作为输入的第一信号的放大器（121）并且输出能够为扬声器（R 1）供电的第二信号， （122），其被配置用于检测第二信号的电流和电压，并且用于基于第一信号的电压和选择信息（k）来控制所述放大器，所述选择信息（k）允许选择 根据第二信号的电压或电流来驱动放大器（121）;调谐装置（123），其被配置用于改变装置（12）的输出阻抗，使得当第一音频信号具有恒定的频率 和电压，第二信号的电压将独立于用于控制所述放大器（121）的控制装置所使用的选择信息（k）。