| 摘要 |
This high fidelity audio amplifier with very low distortion and high efficiency (10) includes: 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) having very high linearity and low output impedance, capable of 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 ten times lower than the modulus of the impedance of the load (16) capable of 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 representative signal of the current provided 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 representative signal of the current provided at the output by the reference voltage generator (18) are capable of ensuring linear control of the power voltage generator (20). |
