×

ADAPTIVE FILTER WHEREIN OPPOSITE CONDUCTIVITY TRANSISTORS ARE OPERATIVE IN RESPONSE TO SIGNALS IN EXCESS OF PREDETERMINED AMPLITUDE

  • US 3,694,776 A
  • Filed: 12/14/1970
  • Issued: 09/26/1972
  • Est. Priority Date: 12/14/1970
  • Status: Expired due to Term
First Claim
Patent Images

1. An adaptive filter circuit including in combination;

  • filter means having an input terminal and an Output terminal, said filter means having a first predetermined attenuation characteristic for attenuating and filtering signals coupled therethrough from said input terminal to said output terminal, first and second opposite conductivity transistors coupled together and to said input terminal and a first terminal of said filter means, said first transistor operative in response to portions of said signals coupled to said filter means input terminal having a first polarity and in excess of a predetermined amplitude to conduct, said second transistor operative in response to portions of said signals having a second polarity and in excess of said predetermined amplitude to conduct, said first and second transistor conduction being operative to change the first predetermined attenuation characteristic of signals coupled through said filter means from said input terminal to said output terminal to a second predetermined attenuation characteristic.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×