| 摘要 |
<p>An isolation amplifier employs feedback to accurately amplify an input signal (Sin) while maintaining electrical isolation between the input and output signals (Sout). The isolation amplifier consists of an amplitude modulator, an isolation transformer (101), having a pair of matched secondary windings, a peak-detector output circuit, and a matching peak-detector feedback circuit. The isolation transformer (101) couples an amplitude-modulated signal to both peak detector circuits while maintaining electrical isolation. The output from the feedback circuit is fed back to the amplitude modulator, so that the amplitude-modulated signal represents the difference between the input to the amplifier and the feedback signal.</p> |
