Electronic digital logic circuitry – Multifunctional or programmable – Having details of setting or programming of interconnections...
Patent
1998-09-25
2000-10-31
Tokar, Michael
Electronic digital logic circuitry
Multifunctional or programmable
Having details of setting or programming of interconnections...
326 37, 326 38, 326 39, 326 40, 326 41, 326 80, 326 81, 326 83, 326 86, 326 88, 327536, 327537, H03K 19173, H03K 19175, G05F 110
Patent
active
061408379
ABSTRACT:
A programmable device has digital logic elements and a programmable interconnect structure employing antifuses, the antifuses being programmable to connect selected ones of the digital logic elements together. During normal circuit operation, a first power input terminal is used to power the digital logic elements with a first supply voltage received on the first power input terminal. During normal circuit operation, a second power input terminal is used to protect circuitry of the programmable device from high voltage signals that may be driven onto terminals of the programmable device by circuitry external to the programmable device. During antifuse programming, the second power input terminal is used to drive charge pumps of programming drivers and/or programming control drivers. In some embodiments, the second power input terminal receives a voltage higher than the first supply voltage during antifuse programming such that the oscillating signal that drives the charge pumps has a larger amplitude thereby allowing back bias threshold voltages of transistors in the charge pumps to be overcome, facilitating starting of the charge pumps, and/or increasing charge pump efficiency.
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Apland James M.
Eaton David D.
Wong Richard J.
QuickLogic Corporation
Tan Vibol
Tokar Michael
LandOfFree
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