Browse Prior Art Database

Polarity Sensitive Slave Device

IP.com Disclosure Number: IPCOM000044958D
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Anderson, CJ: AUTHOR

Abstract

A polarity sensitive Josephson junction slave device, designed to receive input and control signals from room temperature devices and forward them to Josephson junction logic devices, should detect a signal only at the beginning of a Josephson logic cycle that has the same polarity as the input signal.

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Polarity Sensitive Slave Device

A polarity sensitive Josephson junction slave device, designed to receive input and control signals from room temperature devices and forward them to Josephson junction logic devices, should detect a signal only at the beginning of a Josephson logic cycle that has the same polarity as the input signal.

The figure shows the slave device, a Josephson long-line receiver (LLR), which generates an output only when the input has the same polarity as the power supply. The LLR is made up of a current injection device (CID) and an interferometer. A Josephson interferometer can be made to switch on the rising edge of the power supply waveform by using the gate current as the control current, as shown by device D1 in the figure. The polarity-sensitive slave circuit is shown in the figure with the room temperature signal I(R) as the input to the LLR and device D1 controlling the gate current I(g) to the CID in the LLR.

The LLR generates an output only when I(g) and I(g) have the same polarity. The device is a slave circuit since I(g) is present only on the rising edge of the power supply and the LLR can only switch where I(g) and I(R) are present.

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