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Closed loop power controller

  • US 5,352,986 A
  • Filed: 01/22/1993
  • Issued: 10/04/1994
  • Est. Priority Date: 01/22/1993
  • Status: Expired due to Fees
First Claim
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1. A closed-loop system, having an input and an output, for controlling power comprising, means to sum an input signal with a derived output signal to produce a difference signal representative of the polarity of the difference between said input signal and said derived output signal,means for producing an asynchronous digital signal representative of the polarity of said difference signal, at least two switching networks, said switching networks having high energy outputs and being responsive to said asynchronous digital signal to reduce the level of said difference signal in a frequency band of interest at said means of producing the said asynchronous digital signal;

  • anda low-pass filter at least of the third order between said high energy outputs and said means of producing the said asynchronous digital signal to attenuate high-frequency noise, said low-pass filter being in said closed loop to enhance the signal-to-noise ratio at said output of said closed-loop system and modified to maintain loop stability.

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