Static information storage and retrieval – Read/write circuit – Flip-flop used for sensing
Patent
1990-06-06
1992-05-12
Fears, Terrell W.
Static information storage and retrieval
Read/write circuit
Flip-flop used for sensing
365226, 36518906, G11C 1300
Patent
active
051133725
ABSTRACT:
Disclosed are current control circuits for use in random access memory integrated circuits, particularly dynamic random access memories (DRAM). The circuits are used to control the amount of current demanded from a electrical supply line from a portion of a memory array served by a sense amplifier, typically the pull-up sense amplifier. The circuits are effective at reducing the transient voltage drop associated with high current demand conditions when the sense amplifiers call for current to charge the bits during a read or refresh cycle. The circuits utilize a capacitor which stores energy while the sense amplifier is not demanding current. The capacitor is charged in a controlled manner to minimize voltage effects on the supply line. The charged capacitor is discharged through an actively controlled current control device, such as a transistor, to the sense amplifier. The charging current to the capacitor can be limited using a controlled transistor or other suitable gating device which is advantageously out of phase with the current control transistor feeding the sense amplifier. The circuits can also be provided with a second capacitor connected to the supply line and discharged to the sense amplifier through a second current control device. The second current control device preferably is of higher impedance to cause greater current demand on the first capacitor than on the supply line. The circuits provide improved transient reduction while maintaining acceptable operating speeds, or increased speed for a given transient voltage change.
REFERENCES:
patent: 4291392 (1981-09-01), Proebsting
patent: 4980863 (1990-12-01), Ogihara
Fears Terrell W.
Micro)n Technology, Inc.
LandOfFree
Actively controlled transient reducing current supply and regula does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Actively controlled transient reducing current supply and regula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Actively controlled transient reducing current supply and regula will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2427466