| 摘要 |
A Hybrid feedback Controlled Oscillation Modulator (HCOM) is disclosed, having a 1st feedback path from the output voltage of the switching stage and a second feedback path from the filter output, the two feedback paths being superposed to provide a weighted state feedback signal. The state feedback path signal is subtracted from the input signal to form an error signal, the error signal filtered by a forward path compensation block B(s), closing the loop by feeding the pulse modulator, the loop having a transfer function such that self-oscillation can be established in the closed loop system. In an example embodiment, the first feedback path has a low pass characteristic and the second feedback path lead characteristic, the first feedback path being weighted by a weighting factorβ. Further embodiments include a pure passive realization without a forward path device and the application of 3rd feedback loops to enhance global amplifier performance. |
