One-time programmable logic cell

A one-time programmable cell, comprising:

• a fuse element having a first terminal coupled to a first supply voltage and a second terminal connected to a connection node;
• an inverter having an input coupled to the connection node, a first supply terminal coupled to a reference voltage, and further having a second supply terminal and an output terminal;
• a first transistor having a first terminal coupled to the connection node, a second terminal coupled to a second supply voltage, and a control terminal coupled to the output of the inverter;
• and a second transistor having a first terminal coupled to the second supply voltage, a second terminal coupled to the second supply terminal of the inverter and further connected to a control terminal of the second transistor, the second transistor configured to have a threshold voltage greater than a threshold voltage of the first transistor.

A cell for providing a logic state according to the state of a fuse element, the cell comprising:

• a fuse element having a first terminal coupled to a low supply voltage, and a second terminal;
• a first transistor having a first terminal coupled to a high supply voltage, a second terminal coupled to the second terminal of the fuse element, and a control terminal;
• an inverter having an input terminal coupled to the second terminal of the first transistor and to the second terminal of the fuse element, an output terminal coupled to the control terminal of the first transistor, a first supply terminal coupled to the low voltage supply and a high supply terminal;
• a second transistor having a first terminal coupled to the high supply voltage, a second terminal coupled to the high supply terminal of the inverter, and a diode connected control terminal;
• and a third transistor having a first terminal coupled to the low supply voltage, a second terminal coupled to the input terminal of the inverter, and a control terminal coupled to a control signal source.