Step-Up Circuit Stepwise Current Control for Induction Noise

The patent segments the single large current change into multiple smaller current changes by introducing intermediate current thresholds. Instead of switching directly from zero to the final target current value, the switching element progresses through multiple intermediate current levels (first intermediate threshold, second intermediate threshold, etc.), thereby reducing the rate of current change (di/dt) and minimizing electromagnetic induction effects in each transition stage.

The patent applies preliminary action by pre-establishing multiple intermediate current thresholds before the final target current value is reached. These intermediate thresholds are set in advance to guide the gradual current increase, ensuring that the system prepares for controlled transitions and avoids sudden large current fluctuations that would cause harmful electromagnetic induction.

The patent divides the rapid current increase into multiple controlled stages by setting intermediate current thresholds. Each stage increases the current by a smaller amount at a controlled rate, maintaining faster overall response compared to traditional methods while avoiding the harmful voltage spikes caused by single-step rapid current changes.

The patent implements periodic action through repeated switching cycles between the intermediate current thresholds and the target current value. The switching element oscillates between these thresholds, progressively building up the current to the final value through controlled periodic transitions, which reduces electromagnetic induction effects while maintaining response speed.

The patent segments the rapid current decrease during shutdown into multiple smaller drops by introducing intermediate current thresholds for reduction. Instead of dropping the current from the final target value directly to zero, the system decreases through intermediate thresholds (first intermediate threshold, second intermediate threshold, etc.), reducing the rate of current change and minimizing electromagnetic induction effects while maintaining shutdown speed.

The patent applies preliminary action by pre-establishing intermediate current thresholds for reduction before shutdown begins. These thresholds guide the controlled current decrease, ensuring that the system prepares for gradual current reduction and avoids sudden large current drops that would cause harmful voltage changes in signal lines.