Memory cell in capacitive logic
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsYann Perrin, Hervé Fanet, Ayrat Galisultanov, Gaël Pillonnet
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Abstract
A memory cell in capacitive logic, including a bistable system including a fixed element and a mobile element capable of taking one or the other of two stable positions with respect to the fixed element; a read device including a variable-capacitance capacitor including a first fixed electrode and a second mobile electrode rigidly fixed to the mobile element; and an electrically controllable write device for placing the mobile element in one or the other of its two stable positions.
Claims11
A memory cell in capacitive logic, comprising:
- bistable system comprising a fixed element and a mobile element capable of taking one or the other of two stable positions with respect to the fixed element;
- read device comprising a variable-capacitance capacitor comprising a first fixed electrode and a second mobile electrode rigidly fixed to the mobile element;
- and
- an electrically controllable write device for placing the mobile element in one or the other of its two stable positions,
- wherein the bistable system is:
- a) an electrostatic system comprising:
- a fixed electrode and a mobile electrode, the fixed electrode comprising two conductive parts electrically connected to each other and disposed on either side of the mobile electrode;
- a return spring for returning the mobile electrode to a rest position;
- and
- a voltage application circuit for applying a direct bias voltage between the fixed electrode and the mobile electrode,
- or
- b) an electrodynamic system comprising:
- a fixed conductive coil and a mobile element made of a ferromagnetic material disposed inside the coil;
- a return spring for returning the mobile element made of a ferromagnetic material to a rest position;
- and
- a current application circuit for applying a direct bias current (IP) between first and second ends of the coil.
A memory cell in capacitive logic, comprising:
- a bistable system comprising a fixed element and a mobile element capable of taking one or the other of two stable positions with respect to the fixed element;
- a read device comprising a variable-capacitance capacitor comprising a first fixed electrode and a second mobile electrode joined mechanically to the mobile element;
- and
- an electrically controllable write device for placing the mobile element in one or the other of its two stable positions,
- wherein the bistable system is a mechanical system, comprising a curved flexure beam coupled by its ends to a fixed frame, the ends of the beam being coupled to the fixed frame by way of springs, the bistable system further comprising an electrostatic actuating device adapted to actuate the springs so as to move the ends of the beam further apart from each other or closer together.
Dependencies are inferred from the claim text.