Zero power fuse circuit using subthreshold conduction
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United States of America Patent
Stats
-
Feb 20, 2001
Grant Date -
N/A
app pub date -
Feb 23, 1999
filing date -
Feb 23, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A zero static power laser fuse circuit is formed from one laser fuse and three transistors, with the fuse connected in series to a reverse-biased diode and with the common node of the fuse and diode connected to the input of a driving circuit, such as a CMOS inverter. Blowing the fuse allows a small subthreshold conduction current to flow to the common node and pull the node to the opposite logic state. This fuse circuit, which allows the capacitance at the common node to be minimized for zero static power operation, requires less circuit area than previous zero static power fuse circuits.
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