摘要 |
Circuits, devices and methods are provided, such as an amplifier (e.g., a voltage regulator) that includes a feedback circuit that supplies negative feedback through a feedback path. One such feedback path includes a capacitance coupled in series with a“one-way”isolation circuit through which a feedback signal is coupled. The“one-way”isolation circuit may allow the feedback signal to be coupled from a“downstream”node, such as an output node, to an“upstream”node, such as a node at which an error signal is generated to provide negative feedback. However, the“one-way”isolation circuit may substantially prevent variations in the voltage at the upstream node from being coupled to the capacitance in the isolation circuit. As a result, the voltage at the upstream node may quickly change since charging and discharging of the capacitance responsive to voltage variations at the upstream node may be avoided. |