| 摘要 |
In an apparatus, a control signal is generated in response to a comparison between a reference signal REF and a feedback signal FB. Then, charge is provided to first and second low pass filters (LPFs 202-1, 202-2). The first and second LPFs have first and second bandwidths, respectively, and the second bandwidth is greater than the first bandwidth. First and second gains are then applied by amplifiers 204-1, 204-2 to the outputs from the first and second LPFs, respectively, so as to generate first and second voltages, respectively. The first gain is also greater than the second gain. The feedback signal is then generated by a summer 206 from the sum of the first and second voltages. |
