Abstract: An architecture for supplying air to a high-pressure compressor (140) of an auxiliary gas generator (14) from a pressurized cabin (12) of an aircraft, comprising: a load compressor (16, 52) rotationally driven by a common rotation shaft (146) providing a mechanical coupling between the high-pressure compressor and a high-pressure turbine (144) of the auxiliary gas generator and supplied by an outside air intake (18, 58); a first regulation valve (22) assembled at the outlet of the load compressor to control all or part of the air flow delivered by the load compressor; a second regulation valve (22) assembled at the outlet of the pressurized cabin to control the air flow drawn from inside the pressurized cabin; a mixer (24) receiving the outputs of the first and second regulation valves to add the air drawn from inside the pressurized cabin to all or part of the air delivered by the load compressor; and a third regulation valve (26) assembled at the outlet of the mixer to control the air flow injected into the