Fast pre-programming circuit for floating gate memory

Details Fast pre-programming circuit for floating gate memory Fast pre-programming circuit for floating gate memory

1995-05-18

1996-07-23

Yoo, Do Hyun

Static information storage and retrieval

Floating gate

Particular connection

36518516, 36518529, 365218, G11C 1606

Patent

active

055396887

ABSTRACT:
A circuit for speeding up the pre-programming of floating gate storage transistors such as FLASH EPROMS, and particularly speeding up the pre-programming of a block or array of floating gate storage transistors includes a controllable voltage source that supplies gate programming potential across the control gate and source of the FLASH EPROM transistor cells to be programmed. A control circuit is provided that controls the voltage source to vary the gate programming potential during a programming interval as a function of time in order to decrease the time required for a given amount of charge movement to program the selected floating gate transistors. The wordline voltages are varied, while the source voltage is held constant. By starting at a lower wordline voltage, and increasing during the programming interval to a high wordline voltage, the programming speed is increased, and the high final turn-on threshold voltage for the programmed floating gate storage transistors is achieved. In addition, in order to speed up pre-programming, a programming potential is applied to four wordlines in parallel during a single programming interval. Further, the load on cells being programmed is adjusted to improve programming speed.

REFERENCES:
patent: 5043940 (1991-08-01), Harari
patent: 5050125 (1991-09-01), Momodomi et al.
patent: 5163021 (1992-11-01), Mehrotra et al.
patent: 5399891 (1995-03-01), Yiu et al.

Affiliated with

Also associated with

Rating

Fast pre-programming circuit for floating gate memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fast pre-programming circuit for floating gate memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast pre-programming circuit for floating gate memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-718899