Patent ID: 6476664
Filing Date: 2002-11-05
Classification: G11C

Abstract:
An integrated device comprising:a switching element having a bulk terminal; and a voltage selector circuit that includes: first and second selector inputs, receiving a first and a second voltage, respectively; an output connected to said bulk terminal of said switching element; an input stage having a first voltage input and a second voltage input, a control input, and an output, said first and second voltage inputs being connected to said first and second selector inputs of said voltage-selector circuit, respectively, and said control input receiving a first operative condition signal to control selective connection of one of said first and second voltage inputs to said output; a comparator having a first input connected to said output of said input stage, a second input receiving a third voltage, and an output generating a first control signal having a first level when said first input is at a higher voltage than said second input and having a second level when said second input is at a higher voltage than said first input; a logic circuit receiving said first control signal and a second operative condition signal, said logic circuit generating a second control signal having a first level when said first control signal has said second level and when said second operative condition signal has a preset level; and a switching circuit receiving said first voltage, said second voltage and said third voltage, said first control signal and second control signal, as well as said second operative condition signal, said switching circuit having an own output connected to said output of said voltage-selector circuit and supplying, on said own output, said second voltage in presence of said first level of said second control signal, said first voltage in presence of said preset level of said second operative condition signal, and said third voltage in presence of said first level of said first control signal.