Semiconductor circuit e.g. semiconductor memory includes high and low voltage sources connected selectively to conduction area of programmable element by connectors and switches

摘要

The explicit high voltage source (1) and internal low voltage source (2) are selectively connected to respective connection areas (4,5) of a programmable fuse (3) by respective connectors (6,7). The switches (8,9) connect the connectors to the connection areas, when a control signal is applied to the switches from a controller (16), to apply required voltage.