Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Fusible link or intentional destruct circuit
Reexamination Certificate
2008-07-15
2008-07-15
Richards, N. Drew (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Fusible link or intentional destruct circuit
C365S225700
Reexamination Certificate
active
07400185
ABSTRACT:
A circuit for programming an antifuse coupled between a first node and a second node includes at least one transistor for supplying a programming potential VPPto the first node. A first transistor has a source coupled to a third node switchably coupleable between a potential of VPP/2 and ground potential, a drain, and a gate. A second transistor has a source coupled to the drain of the first transistor, a drain coupled to the second node, and a gate. Programming circuitry is coupled to the gate of the first transistor and the gate of the second transistor and configured to in a programming mode apply a potential of either zero volts or VPP/2 to the gate of the first transistor and to apply a potential of VPP/2 to the gate of the second transistor. The first and second transistors have a BVDss rating of not more than about VPP/2.
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Actel Corporation
Hiltunen Thomas J
Lewis and Roca LLP
Richards N. Drew
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