×

Power supply for cellular communication stations

  • US 5,731,693 A
  • Filed: 10/23/1996
  • Issued: 03/24/1998
  • Est. Priority Date: 10/23/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a system for supplying a DC voltage to a load, such system having an AC-to-DC converter, adapted to receive an AC line input, for normally supplying a regulated DC output to the load, and a backup system for supplying DC power to the load during AC power interruption, the improvement comprising the backup system including:

  • a backup battery producing a DC output voltage;

    a differential DC-to-DC converter having a power input connected in parallel with the battery for receiving power therefrom and an output connected in series with the battery, the battery voltage and said differential DC-to-DC converter output supplying an aggregate voltage to the load;

    a sensing circuit for measuring the aggregate voltage supplied to the load and for sending a control signal to the differential DC-to-DC converter, the differential DC-to-DC converter adjusting the voltage of its output based on the control signal for maintaining the aggregate output voltage at a predetermined value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×