Browse Prior Art Database

Sense Amplifier

IP.com Disclosure Number: IPCOM000096313D
Original Publication Date: 1963-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Bishop, DA: AUTHOR

Abstract

The sense amplifier effectively discriminates between potential signals differing by relatively small magnitudes.

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Sense Amplifier

The sense amplifier effectively discriminates between potential signals differing by relatively small magnitudes.

Signals sensed by windings 10, 11 and 12 on reading of a magnetic core array, are applied through respective transformers 13, 14 and 15 and accompanying rectifying circuits 16, 17 and 18 to a transistor amplifier circuit. This includes an emitter follower stage 19 and a pair of amplifying stages 20 and
21. Included in the load circuit of the transistor of amplifier 21 is tunnel diode 22.

Tunnel diode 22 is biased so that noise signals produce currents through it less than 11. Sensed input signals produce currents which tend to exceed 11. Thus, the resistance of the diode increases to provide a largely enhanced output of the amplifier at terminal E0. The output potential developed across tunnel diode 22 is also regeneratively coupled back through an emitter follower stage 23 to the input of amplifier stage 20 to enhance the output. The signal in the amplifier output stage 21 causes a transition along the tunnel diode characteristic curve 24 from a first positive region to the second positive region.

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