Patent ID: 7541834
Filing Date: 2009-06-02
Classification: G11C,H01L,H03K

Abstract:
1. An integrated circuit comprising: a voltage reference node configured to be connected to a reference voltage external to the integrated circuit; a first node configured to be connected to a first voltage source external to the integrated circuit, the first voltage source being for supplying a programming voltage; a second node configured to be connected to a second voltage source external to the integrated circuit, the second voltage source being for supplying a power voltage for operating the integrated circuit; a plurality of fuses, each having a first end, coupled to the first node, and a second end; a voltage divider having a voltage input, a voltage output, and a control input; a multiplexer configured to selectively couple the voltage input to the first node or the second node, the multiplexer including a plurality of transistors, each having a current path coupled to the second end of a respective fuse, and a control input responsive to the voltage output of the voltage divider.