Browse Prior Art Database

Capacitor Storage Strobe Gate

IP.com Disclosure Number: IPCOM000095152D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Gladu, RG: AUTHOR

Abstract

Capacitor read-only storage devices in most instances utilize the fall of the drive pulse to derive the sense signal. When the driver turns off, it returns exponentially to the supply voltage. This recovery couples a signal of opposite polarity with respect to the sense signal into the sense line. It is of sufficient magnitude to set the bit latch if it occurs concurrently with the sense amplifier strobe pulse. This phenomena limits the speed of the read cycle. This is because the time period T(0) cannot be reduced beyond the point at which drive skew causes an overlap with strobe. This circuit responds to an unused bit, the first to be driven. The circuit provides a gate signal, either a 1 or 0 provides the gate signal, to turn the strobe `` off''.

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Capacitor Storage Strobe Gate

Capacitor read-only storage devices in most instances utilize the fall of the drive pulse to derive the sense signal. When the driver turns off, it returns exponentially to the supply voltage.

This recovery couples a signal of opposite polarity with respect to the sense signal into the sense line. It is of sufficient magnitude to set the bit latch if it occurs concurrently with the sense amplifier strobe pulse. This phenomena limits the speed of the read cycle. This is because the time period T(0) cannot be reduced beyond the point at which drive skew causes an overlap with strobe. This circuit responds to an unused bit, the first to be driven. The circuit provides a gate signal, either a 1 or 0 provides the gate signal, to turn the strobe `` off''. Therefore, T0 can be reduced to its minimum value without the possibility of an overlap of recovery and strobe.

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