Browse Prior Art Database

Monolithic Sense Amplifier

IP.com Disclosure Number: IPCOM000091616D
Original Publication Date: 1968-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Tu, GK: AUTHOR

Abstract

This differential sense amplifier recovers rapidly from large write pulses. A write pulse applied to the base of either input transistor T1A or T1B causes that transistor to be cut off and causes the other input transistor to be driven harder. Transistors T2A and T2B, T3A and T3B translate the ground referenced DC input voltage to a signal that swings the output of the sense amplifier around ground potential. As a result, T4A and T4B function as output transistors that either turn on harder or turn off depending on which input terminal receives the write pulse. Because T1A or T1B receiving the write pulse is cut off by the write pulse, none of the transistors in this sense amplifier are driven into saturation by the write pulse.

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Monolithic Sense Amplifier

This differential sense amplifier recovers rapidly from large write pulses. A write pulse applied to the base of either input transistor T1A or T1B causes that transistor to be cut off and causes the other input transistor to be driven harder. Transistors T2A and T2B, T3A and T3B translate the ground referenced DC input voltage to a signal that swings the output of the sense amplifier around ground potential. As a result, T4A and T4B function as output transistors that either turn on harder or turn off depending on which input terminal receives the write pulse. Because T1A or T1B receiving the write pulse is cut off by the write pulse, none of the transistors in this sense amplifier are driven into saturation by the write pulse. Thus the sense amplifier is ready to sense read pulses in a minimum amount of time after the cessation of the write pulse.

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