Wide amplitude linear voltage-stabilized source special for optical fibre equipment

The utility model relates to a dedicated wide-linear power supply of an optical fiber device with stabilized voltage, which comprises a transformer and extracts a control signal from a secondary winding of the transformer so as to implement automatic switching, and the utility model is characterized in that the whole power supply is constituted by the secondary winding of the transformer connected with a switch circuit and a sampling circuit, and the sampling circuit is connected with the switch circuit through a control circuit, the switch circuit is connected with a regulator. The stabilized voltage of the utility model has wide working range and can be used for automatic detecting and circuit optimization controlling, and does not interfere a transmitted signal in an automatic switching process, the utility model has simplified processes of installation, debug and maintenance, and is a dedicated wide-linear power supply of the optical fiber device with the stabilized voltage which is convenient in use, reliable in whole and good in stability.