Accession Number : AD0768335

Title :   A Novel Parametric Negative Resistance Effect in Josephson Junctions.

Descriptive Note : Rept. for 1 Jan 73-30 Jun 73,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Kanter,Helmut

Report Date : 29 OCT 1973

Pagination or Media Count : 18

Abstract : The negative resistance effect recently predicted for current controlled highly damped Josephson junctions is experimentally demonstrated at a frequency of 9 GHz. Characteristically, the pump (or Josephson) frequency is smaller than the amplified one and the pump mechanism is effective over a broad range of frequencies in contrast to the conventional parametric negative resistance effect where the pump frequency exceeds that of signal and idler and where the frequency of operation is limited to a narrow range. The braodband feature renders operation uncritical to tuning and bias voltage fluctuations. The fact that the junction is the element of lowest impedance in the circuit alleviates to a degree the matching problem generally encountered with Josephson contacts. (Author)

Descriptors :   (*SUPERCONDUCTORS, ELECTRICAL RESISTANCE), TUNNELING(ELECTRONICS), PARAMETRIC AMPLIFIERS, SUPERCONDUCTIVITY, NEGATIVE RESISTANCE CIRCUITS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE