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US 2006/0151613 A1Published application
Memory devices
AssigneeMems-ID Pty. Ltd.
InventorRonald Zmood
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AssigneeMems-ID Pty. Ltd.
InventorRonald Zmood
Estimating the term…
A passive memory device includes a plurality of resonant members, e.g. of a cantilever or bridge-type form, that may have different resonant frequencies and that may be held against vibrations by end or side tethers. Data may be recorded in the device by removing various of the tethers, so that, on applying an excitation signal, e.g. from a transmitter, untethered resonant members vibrate strongly in response to their resonant frequencies, and provide a response signal that can be picked up e.g. by a receiver and correlated with the excitation signal frequencies to determine which resonant members have been untethered. The response by an untethered resonant member can correspond to a logical “1”, whilst the lack of a response signal at a known resonant member frequency can correspond to a logical “0”, or vice versa. The device may be made using MEMS technology, and various device structures and excitation/detection methods are disclosed including the use of excitation/detection circuitry within the device and the use of magnetic, Lorentz, electrostatic and/or piezoelectric forces.
A memory device including a plurality of resonant members that are held against vibration by restraining elements, disablement of restraining elements allowing associated resonant members to vibrate in response to an applied excitation signal in order to represent data.
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16-18. (canceled)
22-23. (canceled)
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47-48. (canceled)
50-59. (canceled)
A memory device including a plurality of resonant members that are configured to vibrate in response to ac current, the resonant members having different resonant frequencies and being restrained against vibration by one or more tether elements, the tether elements being removable so as to allow the resonant members to vibrate at their resonant frequencies in response to ac current induced in the device by an applied excitation signal.
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A memory device including a plurality of resonant members, the resonant members having different resonant frequencies and being designed to vibrate in response to a Lorentz type force, the resonant members being restrained against vibration by one or more tether elements, the tether elements being removable so as to allow the resonant members to vibrate at their resonant frequency in response to an applied excitation signal.
63-69. (canceled)
A memory device including a plurality of resonant members and an associated excitation circuit for exciting the resonant members to vibrate in response to an excitation signal.
A memory device including a plurality of resonant members and an associated detection circuit, a measurable characteristic of the circuit changing in dependence on the vibration of the resonant members.
A memory device including a plurality of resonant members for representing data, the resonant members being vibratable in response to ac current induced in the device.
A memory device including a plurality of resonant members for representing data that are vibrated by a Lorentz-type force.
A memory device including a plurality of resonant members for representing data that are vibrated by an electrostatic force, each resonant member comprising a pair of capacitively coupled electrodes.
A memory device including a plurality of resonant members for representing data that are vibrated by a piezoelectric force.
A memory device including a plurality of bridge type resonant members for representing data that are held against vibration by one or more tethers along one or both of their sides.
Dependencies are inferred from the claim text.