Patent ID: 7456480
Filing Date: 2008-11-25
Classification: G11C,H01L

Abstract:
1. A semiconductor device comprising: an input terminal; a first aging device comprising a first source, a first drain, and a first gate, the first source being connected to the input terminal in such a manner as to turn on at a first life τ a second aging device comprising a second source, a second drain, and a second gate, the second source being connected to the input terminal, the second gate being connected to the first drain of the first aging device, the second drain being connected to the first gate of the first aging device in such a manner as to turn on at a third life τ a first switch element comprising a first terminal and a second terminal, the first terminal being connected to the first drain of the first aging device in such a manner as to turn off when the second aging device is on; a second switch element comprising a third terminal and a fourth terminal, the third terminal being connected to the second drain of the second aging device in such a manner as to turn off when the first aging device is on; and an output terminal connected to the second terminal of the first switch element, and the fourth terminal of the second switch element.