This disclosure describes systems and methods for a ventilator-derived CPAP system that mimics the flow and/or pressure oscillations or fluctuations of the B-CPAP system creating a breath type referred to herein as a mimicked-bubble-CPAP (M-CPAP) mode. Further, the disclosure describes systems and methods for delivery of other breath types with flow and/or pressure oscillations or fluctuations that mimic the oscillation observed during ventilation with the B-CPAP system, referred to herein as adjusted breath types.