Thursday, 5 October 2017

Factors exhibit differential –ve resistances in IMPATT:

  • The IMPATT diodes exhibit a differential –ve resistance by two effects.

(1) The impact ionization avalanche effect, which causes the carrier current I0(t) and the ac voltage to be out of phase by 900.

(2) The transit-time effect, which further delays the external current Ie(t) relative to the ac voltage by 900 
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