Embodiments of the present invention provide a power supply apparatus and method, and a user equipment. A second transmission signal is received at the common port and is routed through the signal routing assembly delivered to output of the signal routing assembly. The corresponding resources are then released. A method may be implemented that skips or drops periodic pulses without apparently changing the frequency of the pulses. Influencing of the multi-step transmission by the electric machine is taken into account in the setting of the engagement point of the friction clutch. Within the through channel is a microchannel part having a filtering portion and a decompression portion wherein filtering and decompression of the passing refrigerant can be performed generally at the same time.