NPNP

AcronymDefinition
NPNPNegative Positive Negative Positive
NPNPNegative-Positive-Negative-Positive (tunnel diode)
NPNPNavajo Place Names Project
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References in periodicals archive ?
The total current I, starting the flow from the anode region 1 p and reaching the cathode region [n.sub.2] is influenced by the integral coefficient of the majority carriers (holes for pnpn structures and electrons for the npnp structures) injection of junction J1, by the integral transfer coefficient of the minority carriers (holes for pnpn structures and electrons for the npnp structures) through wide base, and by the avalanche multiplication of charge carriers, taking place in the collector junction at relatively high forward voltages.
HISTORICAL: Peter Rosier, of Loveitts Commercial, (with from left) Carl Jones, of Mander Hadley & Co, Nick Bagshaw, of Locke & England, Judith Hall, of the Cathedral Development Trust, Claire Hynes, of Harris Sign Group, and Roger Medwell, of NPNP Aerospace, look at some of the antiques donated.