Apparatus for current pulse generation in voltage down converters

摘要

A voltage converter circuit for an electronic device includes a transistor switch (140) for providing current pulses to a current input node. The transistor switch has a gate (128) and a turn-on threshold voltage. An adjustment circuit (114) provides a controlled voltage to the gate for turning on the transistor switch and the adjustment circuit includes a subcircuit for compensating for variations in the turn-on threshold voltage of the transistor switch. A timer (16) for enables the adjustment circuit for a preset period of time.