Memory loss protection circuit

Details Memory loss protection circuit Memory loss protection circuit

1985-07-15

1987-09-08

Popek, Joseph A.

Static information storage and retrieval

Powering

365229, G11C 1134

Patent

active

046929037

ABSTRACT:
In a data processing system, an input line voltage is provided to a series voltage regulator which, in turn, provides well defined DC voltages to various logic devices including a system controller, such as a microprocessor. System controller operation is degraded by variations in the DC voltage provided thereto, generally resulting in the erroneous writing of data into a nonvolatile memory in the data processing system when the DC voltage provided to the system controller drops below a given voltage level caused by, for example, variations in the input line voltage. The input line voltage to the data processing system is monitored across the series voltage regulator for deselecting/write disabling the memory in the event the input voltage drops below a predetermined level, such as due to power transients, to prevent loss of data stored in the memory. By monitoring the system input voltage across the series voltage regulator, the ratio of input voltage change to the input voltage level is increased to facilitate detection of low voltage states. By thus increasing the relative value of an input voltage drop required for deselection/write disabling of the nonvolatile memory, low voltage detection circuitry design and operating parameters as well as component ratings may be relaxed.

REFERENCES:
patent: 4388706 (1983-06-01), Butler
patent: 4485456 (1984-11-01), Toyoda
patent: 4493000 (1985-01-01), Edwards
patent: 4587640 (1986-05-01), Saitoh
Magnavox Service Manual, No. 7362A, Issued Mar. 1979.

Affiliated with

Also associated with

Rating

Memory loss protection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory loss protection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory loss protection circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2163007