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Transistorized superregenerative radio frequency detector

  • US 4,143,324 A
  • Filed: 05/20/1976
  • Issued: 03/06/1979
  • Est. Priority Date: 05/20/1976
  • Status: Expired due to Term
First Claim
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1. Superregenerative detector apparatus which comprises(a) an oscillatory circuit tuned to the frequency of the signals to be detected, said circuit comprising(i) a transistor having a base, a collector and an emitter,(ii) a circuit including a resonant circuit providing the only direct current path to said base, said resonant circuit being connected between said base and said collector,(b) a quenching circuit comprising(i) means including a capacitor for establishing a quench frequency,(ii) means connecting said capacitor between the collector and emitter of said transistor,(iii) means for applying operating voltage to said capacitor,(iv) said capacitor supplying current to said oscillatory circuit until the voltage at said base reaches the turn on voltage of said transistor thereby establishing the quench frequency of said circuit without additional biasing means connected to said base.

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