Patent ID: 6650173
Filing Date: 2003-11-18
Classification: G11C

Abstract:
Programmable voltage generator comprising:a negative feedback element; a programmable resistive divider; and control means, said feedback element having a first and a second input terminal, and an output terminal coupled to an output node, said first input terminal receiving a reference quantity, said programmable resistive divider having a feedback node connected to said second input terminal and comprising a feedback resistor interposed between a line at reference potential and said feedback node and a programmable resistor interposed between said feedback node and said output node, said programmable resistor comprising a plurality of resistive elements and a plurality of controlled switch elements, said resistive elements disposed reciprocally in series between said output node and said feedback node and defining between them a plurality of intermediate nodes; each of said controlled switch elements directly connected between said output node and a respective intermediate node, said programmable resistive divider further comprising an additional controlled switch element interposed between the output terminal and a first one of the plurality of resistive elements, and said control means suitable for varying a total resistance between the output node and the line at reference potential by selectively controlling the closure of one of said controlled switch elements.