CA2279582A1 - Passive transponder with impedance modulation - Google Patents

Passive transponder with impedance modulation Download PDF

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Publication number
CA2279582A1
CA2279582A1 CA002279582A CA2279582A CA2279582A1 CA 2279582 A1 CA2279582 A1 CA 2279582A1 CA 002279582 A CA002279582 A CA 002279582A CA 2279582 A CA2279582 A CA 2279582A CA 2279582 A1 CA2279582 A1 CA 2279582A1
Authority
CA
Canada
Prior art keywords
transponder
bath
value
storing
receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002279582A
Other languages
French (fr)
Other versions
CA2279582C (en
Inventor
Donald J. Urbas
David Ellwood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bio Medic Data Systems Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/322,644 external-priority patent/US5724030A/en
Priority claimed from US08/497,349 external-priority patent/US5767792A/en
Application filed by Individual filed Critical Individual
Publication of CA2279582A1 publication Critical patent/CA2279582A1/en
Application granted granted Critical
Publication of CA2279582C publication Critical patent/CA2279582C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Radar Systems Or Details Thereof (AREA)

Abstract

A passive transponder including an antenna for receiving an input signal and transmitting an output and a memory for storing the data received by the transponder from an interrogator. The transponder can operate in either a read mode or a programming mode. The transponder includes an integrity circuit for indicating the integrity of the input signal, a monitoring circuit that monitors a characteristic of a host and an impedance modulator that prevents the overmodulation of the output signal. A characteristic sensor of the transponder can be calibrated by the method of placing the transponder in a liquid bath, measuring the value of the bath with the transponder, outputting the temperature value measured by the transponder, receiving the output signal and computing the temperature value of the bath, comparing the computed value of the bath with the known value of the bath and storing the difference between the computed value and the known value in a predetermined memory location in the transponder.
CA002279582A 1994-10-13 1995-10-02 Passive transponder with impedance modulation Expired - Lifetime CA2279582C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US08/322,644 1994-10-13
US08/322,644 US5724030A (en) 1994-10-13 1994-10-13 System monitoring reprogrammable implantable transponder
US08/497,349 US5767792A (en) 1994-10-13 1995-06-30 Method for calibrating a temperature sensing transponder
US08/497,349 1995-06-30
CA002159679A CA2159679C (en) 1994-10-13 1995-10-02 System monitoring reprogrammable implantable transponder and method of calibrating same

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002159679A Division CA2159679C (en) 1994-10-13 1995-10-02 System monitoring reprogrammable implantable transponder and method of calibrating same

Publications (2)

Publication Number Publication Date
CA2279582A1 true CA2279582A1 (en) 1996-04-14
CA2279582C CA2279582C (en) 2006-06-06

Family

ID=31191492

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002279583A Expired - Lifetime CA2279583C (en) 1994-10-13 1995-10-02 Method for calibrating and monitoring of transponder measuring means
CA002279584A Expired - Lifetime CA2279584C (en) 1994-10-13 1995-10-02 Passive transponder with energy efficient measuring means
CA002279582A Expired - Lifetime CA2279582C (en) 1994-10-13 1995-10-02 Passive transponder with impedance modulation

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002279583A Expired - Lifetime CA2279583C (en) 1994-10-13 1995-10-02 Method for calibrating and monitoring of transponder measuring means
CA002279584A Expired - Lifetime CA2279584C (en) 1994-10-13 1995-10-02 Passive transponder with energy efficient measuring means

Country Status (1)

Country Link
CA (3) CA2279583C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104622435A (en) * 2015-02-06 2015-05-20 山东省食品药品检验研究院 Pyrogen inspection instrument and inspection method based on implanted type body temperature telemetry technology

Also Published As

Publication number Publication date
CA2279583A1 (en) 1996-04-14
CA2279582C (en) 2006-06-06
CA2279583C (en) 2004-12-14
CA2279584A1 (en) 1996-04-14
CA2279584C (en) 2004-12-14

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MKEX Expiry

Effective date: 20151002