| 摘要 |
<p>The invention relates to a high fidelity audio amplifier having very low distortion and high efficiency (10) comprising: an input (12) for an audio signal to be amplified and an output (14) for feeding a load (16) with the amplified audio signal; a reference voltage generator (18) with high linearity and low output impedance, suitable for receiving as an input the musical signal to be amplified; a power voltage generator (20) the output of which is connected to the output of the reference voltage generator (18), through a coupling impedance (22) the modulus of which is at least 10 times lower than the modulus of the impedance of the load (16) suitable for being fed by the output (14) of the amplifier; and means (28A, 28B, 30, 32) for inputting, at the input of the power voltage generator (20), a signal representing the current supplied at the output by the reference voltage generator (18). The means (28A, 28B, 30, 32) for inputting, at the input of the power voltage generator (20), a signal representing the current supplied at the output by the reference voltage generator (18) comprise a proportional-integral-derivative controller (32).</p> |
