06710621 is referenced by 23 patents.

A module standard for FPGAs is provided in which power supply voltages for daughtercards are not fixed in advance. Instead programmable power supplies are provided and a method is provided in which each daughtercard can specify the required power supply voltage. Thus, unlike prior-art systems, this modular system is backward and forward compatible with FPGA chips from many process generations allowing easy upgrading as new FPGA families become available. A motherboard or baseboard for use with this invention includes a plurality of module connectors into which compatible modules or “daughtercards” can be plugged and a plurality of programmable power supplies. In a preferred embodiment there are four sets of module connectors and sixteen programmable power supplies. This allows each module to have four independently specifiable power supply voltages. A module may also connect several power supplies together in order to obtain higher current at a single voltage. Various schemes are described to ensure that the programmable power supplies will never deliver too high a voltage to the components on the modules.

Title
Programmable power supply for field programmable gate array modules
Application Number
10/76883
Publication Number
6710621 (B2)
Application Date
February 13, 2002
Publication Date
March 23, 2004
Inventor
Allan J Cantle
Glasgow
US
Malachy Devlin
Glasgow
US
Agent
Townsend and Townsend and Crew
US
Assignee
Nallatech
US
IPC
H03K 19/177
View Original Source