Browse Prior Art Database

Memory Card Adaptor with Direct Current Step-up Transformer

IP.com Disclosure Number: IPCOM000119013D
Original Publication Date: 1997-Oct-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Dell, T: AUTHOR [+3]

Abstract

Because power supplies for systems are slowly marching to lower and lower voltages, it is difficult to make use of older subsystems in newer machines. In particular, memory modules, such as SIMMs or DIMMs, are especially vulnerable to this kind of obsolescence. Disclosed is a means of reusing higher power supply memory in newer, lower power supply systems.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 96% of the total text.

Memory Card Adaptor with Direct Current Step-up Transformer

      Because power supplies for systems are slowly marching to lower
and lower voltages, it is difficult to make use of older subsystems
in newer machines.  In particular, memory modules, such as SIMMs or
DIMMs, are especially vulnerable to this kind of obsolescence.
Disclosed is a  means of reusing higher power supply memory in newer,
lower power supply  systems.

      An adapter card is provided that has one or more sockets for an
older, higher voltage technology memory module (for example, a 5V
SIMM) and an edge that plugs into a newer, lower voltage technology
(for example, a 3.3V DIMM).  To facilitate the different voltages,
one or more  monolithic DC to DC voltage converters is incorporated
on the adapter card to step up the voltage received on the adapter
card edge to the voltage required for the devices to be plugged into
the older technology  sockets on the adapter card.  In addition, if
the newer card technology  utilizes an advanced identification
scheme, such as the JEDEC Standard  Serial Presence Detects, the
adapter card would also implement such a scheme so as to be
compatible.  The identification device/scheme could  be
pre-programmed, statically programmed (such as through the use of
switches), or dynamically programmed (through the use of other
devices which can perform the programming of the identification
device by the use of a dynamic state machine), or a combination of
the...