| 摘要 |
A switching circuit useful in a binary demand feedback DC converter having multiple DC outputs which are all independently regulated using a binary on/off technique is disclosed. A comparator associated with each output compares the voltage at a given output with a reference voltage for the respective given output and generates a first signal the moment the output voltage exceeds the reference voltage. Responding immediately to the first signal a switch opens the converter transformer secondary winding associated with that output from a rectifier and filter. The voltage at that output is determined by the voltage across a capacitor in the filter and the capacitor commences discharging to be below the reference voltage at which time the first signal ceases and the switch reconnects the secondary winding to the rectifier and filter to recommence charging the filter capacitor. A logic OR gate having its inputs connected to all comparators senses the first signal from any one of the comparators and provides a signal that operates a second switch that disconnects a binary switch controller from the converter transformer primary winding until there are no first signals present at the input of the OR gate.
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