Patent ID: 9671848
Date: 2017-06-06
CPC Classifications: G06F,H04L

Claim:
1. A redundant power supply circuit comprising: a port detection circuit connected to a plurality of power over Ethernet (POE) ports, the port detection circuit detecting and outputting a plurality of ready signals according to a plurality of power signals output by the plurality of POE ports; a fixed state detection circuit outputting first control signals according to a predetermined voltage signal of a network device; a voltage conversion circuit connected between the plurality of POE ports and the network device, the voltage conversion circuit converting the plurality of power signals into driving voltage signals to drive the network device; and a control circuit receiving the first control signals from the fixed state detection circuit, and the plurality of ready signals from the port detection circuit, the control circuit generating and sending enable signals to the voltage conversion circuit according to the first control signals and the plurality of ready signals; wherein the voltage conversion circuit determines whether the plurality of power signals are converted into the driving voltage signals according to whether the voltage conversion circuit receives the enable signal from the control circuit.