| 摘要 |
A control circuit for, and method of, alternately controlling one of at least two controllable characteristics of a controlled circuit. The circuit includes: (1) a first control subcircuit having a first error amplifier for developing a first control signal as a function of a first controllable characteristic of the controlled circuit, (2) a second control subcircuit for developing a second control signal as a function of a second controllable characteristic of the controlled circuit, (3) an OR circuit for selecting which of the first control signal and the second control signal is to control the controlled circuit and (4) an overshoot limiting circuit for establishing a feedback loop around the first error amplifier as a function of a voltage present in the OR circuit while the second control signal controls the controlled circuit, the feedback loop preventing a saturation of the first error amplifier and thereby reducing a slew rate time delay when the first control signal is selected to control the controlled circuit.
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