A positive airway pressure apparatus (10) comprising: a flow generator (30) coupled to an administration device, wherein the flow generator (30) produces a pressurized gas for the administration device； a controller (80) having a control signal input (90) and configured to produce an output signal that drives the flow generator (30)； a pressure sensor (50) configured to detect the pressure in the positive airway pressure apparatus (10), in which the pressure sensor (50) provides an input signal from the pressure sensor (60) representing the pressure towards the controller (80)； and a feedback loop coupled to the controller (80) and providing a feedback signal (120) to the controller (80), wherein the controller (80) includes a sum component (70) to add three separate signals in order of providing an input added to the controller (80), in which the three separate signals consist of the control signal input (90), the feedback signal (120), and the pressure sensor input signal (60), wherein the sum component comprises three separate inputs corresponding to each of the three separate signals, in which the feedback signal (120) is positive in polarity and the pressure signal (60) has a negative polarity, in which the The source of the feedback signal (120) is between an output of the sum component (70) and an input in the flow generator (30), in which the controller (80) is configured to regulate the pressure by increasing the pressurized gas du During inspiration and reducing the pressurized gas during expiration, thus presenting a negative pressure impedance, and in which the apparatus (80) does not comprise an additional flow sensor device.Un aparato de presión positiva de vía de aire (10) que comprende: un generador de flujo (30) acoplado a un dispositivo de administración, en que el generador de flujo (30) produce un gas a presión para el dispositivo de administración； un controlador (80) que tiene una entrada de señal de control (90) y configurado para producir una
