×

Power supply with increased dynamic range

  • US 4,302,717 A
  • Filed: 02/04/1980
  • Issued: 11/24/1981
  • Est. Priority Date: 02/04/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A power supply circuit for converting an alternating current at an input frequency into an output signal at an output voltage/current level different from the input voltage/current level of the alternating current, a voltage/current source supplying the alternating current which alternately switches flow between a pair of current-flow directions opposite to each other, the circuit comprising:

  • means responsive to a feedback signal for generating a first signal at a first frequency at least one order of magnitude greater than the input frequency;

    a switching transistor which alternately switches on and off at the first frequency in response to the first signal, the transistor having a pair of current-flow electrodes;

    means for directing the alternating current in a single current-flow direction through the current-flow electrodes when the transistor is on and for directing current flowing through the current-flow electrodes back to its original current-flow direction of the pair of current-flow directions, the means for directing substantially not directing current to the current-flow electrodes when the transistor is off, the first signal thereby being impressed on the alternating current to define a second signal;

    means, serially coupled between the voltage/current source and the means for directing, for rectifying the second signal and for averaging it with respect to time to produce the output signal therefrom; and

    feedback means responsive to the output signal for producing the feedback signal to provide feedback regulation of the output signal.

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