| 摘要 |
<p>A floating, constant power, battery feed circuit wherein a single transformer is used to perform the functions of battery feed and audio coupling, AC feedback is used to control the dynamic output impedance of the circuit. To achieve a constant dynamic output impedance, the amount of AC feedback is controlled by the DC output voltage, which in turn depends on the loop resistance. To achieve a constant audio gain from the switching network to the load, the audio signal from the switching network is multiplied by a signal representing the DC output voltage.</p> |
