SELF-OSCILLATING SWITCHING REGULATOR WITH FREQUENCY REGULATION THROUGH HYSTERETIC CONTROL OF THE SWITCHING CONTROL TRIGGER CIRCUIT

摘要

A self-oscillating switching mode regulator is frequency regulated by directly controlling the hysteresis of the switching control circuit in the voltage control feedback loop. The switching control circuit includes a hysteretic bistable trigger circuit whose hysteresis width defined by its upper and lower triggering levels may be widened or narrowed about some mean signal level in response to a frequency error signal.