Patent US5583819A successfully refreshed from Google Patents.
US5583819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of use of radiofrequency identification tags
Assignee: Single Chip Holdings Inc
•
Filing: 1995-01-27
•
Granted: 1996-12-10
•
Expires: 2015-01-27
Abstract
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.
Inventors
- 👤 Bruce B. Roesner
- 👤 Ronald M. Ames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:14
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/14; G11C17/16; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0723; G11C17/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
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.
Claim 2
Independent Claim
68 words
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.
Claim 3
Dependent Claim
22 words
The method of claim 1 where charging said stray capacitance comprises charging said capacitance to a voltage exceeding the antifuse programming voltage.
Claim 4
Dependent Claim
25 words
The method of claim 1 where charging said stray capacitance on said bit line charges said capacitance with approximately 60 microwatts of power or less.
Claim 5
Dependent Claim
25 words
The method of claim 1 where charging said stray capacitance on said bit line charges said capacitance with approximately less than 100 microwatts of power.
Claim 6
Dependent Claim
72 words
The method of claim 1 where selectively discharging said antifuse couples said antifuse through a gated transistor to ground, said gated transistor having a maximum saturation current capacity, said antifuse having a programming time defined for a predetermined time duration, said stray capacitance on said bit line being charged to a power level such that said saturation current is achieved through said antifuse and transistor during said programming time of said antifuse.
Claim 7
Independent Claim
85 words
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.
Claim 8
Independent Claim
85 words
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.
References Cited (Backward Citations)
US4442507A
Cited
US4796074A
Cited
US5008855A
Cited
US5095362A
Cited
US5367207A
Cited
US5243226A
Cited
US5471154A
Cited
US5257222A
Cited
US5469109A
Cited
US5448187A
Cited
US5301159A
Cited
US5371414A
Cited
US5502395A
Cited
US5495436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |