| 摘要 |
<p>The circuit controls the on and off switching of transistors in switched mode power supplies by rectangular pulses fed over transformers. A control circuit determines the voltage-time area of a switching pulse in the transformer initiated by the leading edge of the rectangular pulse. The next rectangular pulse edge generates through switches a further switching pulse of the same voltage-time area, but of the opposite polarity. Switching elements connect the transformer to a first voltage source when the first leading edge appears and to a second voltage source when the second edge occurs.</p> |
