Patent ID: 7203117
Filing Date: 2007-04-10
Classification: G11C

Abstract:
1. A semiconductor integrated circuit comprising: a fuse device in which at least part is blown by a current flowing in the fuse device during application of a program voltage and a resistance value thereof is increased; a program transistor connected to the fuse device in series to form a series circuit, the series circuit being connected to a program power supply; a program start circuit for turning ON, in response to a start signal, the program transistor and thereby starting program of the fuse device; a program monitoring circuit for monitoring change in a resistance value of the fuse device through change in a voltage at a junction point of the fuse device and the program transistor and outputting an end signal at a time point where the resistance value of the fuse device is increased to reach a predetermined resistance value; and a program end circuit for turning OFF, in response to the end signal, the program transistor and thereby terminating the program of the fuse device.