Patent ID: 6545504
Filing Date: 2003-04-08
Classification: G11C,H03K

Abstract:
A programmable switch for a configurable integrated circuit, comprising:a first node in signal flow communication with a bus line and a second node coupled with a circuit element in the integrated circuit; and a non-volatile programmable transistor, having a drain coupled to one of the first node and the second node, a source coupled to the other of the first node and the second node, a gate coupled to an energizing conductor, and a data storage structure, the data storage structure storing at least four states, and the non-volatile transistor operates in a first state allowing uni-directional signal flow from the bus line to the circuit element, a second state allowing uni-directional signal flow from the circuit element to the bus line, and a third state allowing bi-directional signal flow between the bus line and the circuit element, and a fourth state presenting high impedance between the bus line and the circuit element.