| 摘要 |
<p>The electronic apparatus comprises an amplifier (30) functioning in class D with an input (32) for receiving an electrical supply. There is a circuit for measuring the electrical power applied to that input. There is also a variable power supply (35) controlled by the measuring circuit, in order to regulate the transmitted power. The circuit for the variable power supply (35) contains a decoupling circuit (50), and is provided with a control input. Th variable power supply circuit (35) is controlled by measuring a current obtained by the subtractor circuit (40) connected to a comparator (37), with an input from a reference voltage generator (38).</p> |
