DEVICE FOR RESERVE POWER SUPPLY Russian patent published in 2013 - IPC H02J9/04 

FIELD: electricity.

SUBSTANCE: device comprises the main (1) and reserve (4) sources of supply, by negative outputs connected to one output of a load (2), and to its other output via the first diode via the first diode a positive pole is connected from the main source of supply, and also a transistor of p-n-p type (5), the base of which is connected via a resistor with negative poles of sources and via the second diode - with an anode of the first diode, differing by the fact that the positive pole of the reserve source of supply via the emitter-collector transition of the transistor is connected with the cathode of the first diode.

EFFECT: reduced consumption in a reserve supply mode, higher reliability of a device, simplified circuit solution.

2 dwg