DEVICE TO SWITCH RESERVE POWER SUPPLY SOURCE Russian patent published in 2012 - IPC H02J9/06 

FIELD: electricity.

SUBSTANCE: device comprises a switching transistor (4), the base of which via the second resistor (8) is connected to the point of connection of negative outputs of both power supply sources, to which another output of the first resistor (7) is connected, at the same time an emitter of a control transistor (6) is connected to the positive output of the main power supply source (1), a collector - to the base of the switching transistor (4), the emitter of which is connected to the positive output of the reserve power supply source (3), and its collector - to the appropriate output of the load (5).

EFFECT: higher device reliability, reduced power consumption, and expansion of the application field.

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