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Circuit Incorporation of Transfer Negative Resistance Present in Kink Effect Materials

IP.com Disclosure Number: IPCOM000096237D
Original Publication Date: 1963-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Heer, J: AUTHOR

Abstract

The Hall effect for Bi and Bi-Sb alloys which display a large kink effect appears schematically as shown in the drawing. Longitudinal current JL is plotted versus both Hall field ET and longitudinal electric field EL. The latter is an ordinary V-I characteristic with kink EK. The former is a transfer characteristic and a pseudo-negative resistance behavior is present.

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Circuit Incorporation of Transfer Negative Resistance Present in Kink Effect Materials

The Hall effect for Bi and Bi-Sb alloys which display a large kink effect appears schematically as shown in the drawing. Longitudinal current JL is plotted versus both Hall field ET and longitudinal electric field EL. The latter is an ordinary V-I characteristic with kink EK. The former is a transfer characteristic and a pseudo-negative resistance behavior is present.

This property can be used for several device applications of kink type materials, such as stabilization of a sound amplifier operating point. Assume operating point EL and JL. Current drift away from this point produces a large increment of ET occurring 180 degrees out of phase with the drift of current. Incorporation of this transverse field as a feedback mechanism to the current supply circuit stabilizes amplifier operation.

Another use of the property is for a phase shifter of 180 degrees. A 180 degrees phase shifting of an A.C. voltage at EL occurs at ET. In phase sensing logic using the previous property, an element of kink material memory can be sensed with A.C. signals. Consider the region of nominal operation below the kink associated with normal positive transfer resistance as a down or 0 state. A small A. C. current would always be in phase with Hall voltages. However, about the kink, an up or 1 state can be described and sensed via the 180 degrees out of phase relationship between current and Hall volta...