| 摘要 |
The slew rate of switching circuits, e.g. for DC to DC converters, is controlled without unduly sacrificing total switching time, by providing a weaker switching transistor in parallel with each stronger main switching transistor. Switching of the weaker transistor is controlled so as to have a slower slew rate in transitions between switch states than transitions of the main transistor. The main transistor switches at a fast rate for efficiency, but the slower transition by the weaker transistor provides a more gradual transition of the voltage at the desired switching node, so as to reduce EMI and/or input supply noise.
|
