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US 5,583,819 AGranted
Apparatus and method of use of radiofrequency identification tags
AssigneeSingle Chip Holdings, Inc.
InventorsBruce B. Roesner, Ronald M. Ames
Life of this patent
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Abstract
A method of programming or writing to an RFID tag with a transient pulse at both high and low frequencies, i.e. in the GHz and KHz ranges is described. Programming an RFID tag using transient pulses rather than a long duration regulated signal allows for less control circuitry, less programming time, less energy, less cost and power requirements for the RFID tag.
Claims6
A method of programming a radiofrequency identification device comprising:
- providing an antifuse in a memory cell coupled to a bit line in said radiofrequency identification device;
- charging a stray capacitance on said bit line;
- and
- selectively discharging said antifuse to draw a high peak current through said antifuse from said charged stray capacitance to program said antifuse,
- whereby said antifuse is programmed at high speed and low power.
2 more elements
A method of programming an antifuse having a minimum programming time at high speed and low power comprising:
- charging a bit line coupled to said antifuse to a predetermined voltage and thus stored predetermined power level, said bit line having a chargeable capacitance;
- and
- discharging said bit line through said antifuse at high speed substantially equal to said minimum programming time required by said antifuse to generate a voltage and current spike through said antifuse sufficient to program said antifuse while utilizing low average power.
Dependencies are inferred from the claim text.