Patent ID: 6028444
Filing Date: 2000-02-22
Classification: H03K

Abstract:
A programmable device, comprising:a logic module comprising:an internal net driver having a first transistor and a second transistor, the first transistor having a source and drain of a first conductivity type, the second transistor having a source and a drain of a second conductivity type opposite the first conductivity type, the drain of the first transistor being coupled to the drain of the second transistor, the source and drain of the first transistor being disposed in a well, the source of the first transistor being coupled to a first supply voltage Vcc1, the source and drain of the second transistor not being disposed in the well;a third transistor having a source and a drain of the first conductivity type, a gate electrode of the third transistor being coupled within the logic module to a DC voltage, the gate electrode of the third transistor not being coupled to gate electrode of the first transistor, the gate electrode of the third transistor not being coupled to a gate electrode of the second transistor, the source and drain of the third transistor being disposed in the well, the source of the third transistor being coupled to the first supply voltage Vcc1; anda fourth transistor having a source and a drain of the second conductivity type, a gate electrode of the fourth transistor being coupled within the logic module to a second DC voltage, the gate electrode of the fourth transistor not being coupled to the gate electrode of the first transistor, the gate electrode of the fourth transistor not being coupled to the gate electrode of the second transistor, the source and drain of the fourth transistor not being disposed in the well;wherein the source of the first transistor and the third transistor are not coupled to an optional second supply voltage Vcc2, the first supply voltage Vcc1 being greater than the second supply voltage Vcc2;a first routing conductor coupled to the drain of the first transistor and to the drain of the second transistor;a second routing conductor; andan antifuse for coupling the first routing conductor to the second routing conductor, the first routing conductor, the second routing conductor and the antifuse being part of a programmable interconnect structure of the programmable device.