Implantable inductively programmed temperature sensing transponder
a transponder and inductively programmable technology, applied in the direction of near-field systems using receivers, instruments, applications, etc., can solve the problems of inability to selectively change the transponder user as needed, the transponder user's lock is permanent, and the integrated circuitry requires too much power for the read mode operation, etc., to speed up the voltage synchronization process and reduce the power used
Inactive Publication Date: 2005-07-28
URBAS DONALD J +2
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AI Technical Summary
Benefits of technology
The solution minimizes power usage during programming and reading, speeds up synchronization, expands memory capacity, allows separate transmission of temperature data, and enhances the precision of temperature readings while providing flexible memory protection.
Problems solved by technology
However, it suffers from the disadvantage that the integrated circuitry required too much power for operation in the READ MODE.
Although the prior art taught locking the data in the memory to preserve the integrity of the memory, the lock was permanent and could not be selectively changed by the transponder user as needed.
Because the entire data signal was required to be transmitted as well as the preamble during any synchronization process, time was wasted, slowing down the overall programming and / or read cycle.
Lastly, during programming, utilizing conventional signal encoding techniques, the timing of the signal transmitted between the transponder and interrogator was critical.
However, because timing was so critical, noise or other environmental factors could readily disrupt the signal, damaging the results.
Method used
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[0030] Reference is first made to FIG. 1 in which an interrogator, generally indicated as 10 and a transponder generally indicated as 20 are shown. Interrogator 10 and transponder 20 communicate with each other through inductive coupling as known in the art from U.S. Pat. No. 4,730,188. As will be discussed below, interrogator 10 provides a signal to transponder 20 which provides power to transponder 20, a clock signal and an operational command such as enter the PROGRAM MODE or TEMPERATURE MODE. Transponder 20 sends a return signal containing information therein to interrogator 10 as is known in the art.
[0031] Interrogator 10 includes a CPU 12 for generating command / power / clock signals (collectively interrogator signals) in response to the user inputs. These signals are input to an antenna 14 for broadcast to transponder 20.
[0032] An antenna 22 within transponder 20 receives the interrogator signal from interrogator 10 and inputs a 364 kHz signal to a rectifier 24 (FIG. 2) which ...
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Abstract
A memory for a transponder includes a data region and a user lock region, wherein the data region stores characters therein and the user lock includes a plurality of bits, each bit corresponding to a respective character. The bits in the user lock region can indicate a lock status regarding whether the corresponding character may be reprogrammed.
Description
RELATED U.S. PATENT APPLICATIONS [0001] The present application is a divisional application of U.S. patent application Ser. No. 09 / 502,696, filed on Feb. 11, 2000, which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION [0002] The present invention is directed to an implantable inductively programmable temperature sensing transponder, and, more particularly, to a transponder having operations which may be modified through software control [0003] Implantable programmable temperature transponders are passive devices that are implanted under the skin of laboratory animals, by way of example, for positive animal identification. As is known in the art, conventional transponders, such as those sold by Bio Medic Data Systems, Inc. include a coil antenna coupled to an integrated circuit (IC) chip. The chip includes a memory and a thermistor. Circuitry is provided for receiving an interrogation signal, deriving power from the interrogation signal, deriving timin...
Claims
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IPC IPC(8): A01K11/00A61B5/00G01K1/02G06K17/00G06K19/07G08C17/00H04B1/59H04B5/48
CPCA01K11/006A61B5/0008A61B5/0031G06K19/0723G01K13/002G06K19/0717G01K1/024G01K13/20
Inventor URBAS, DONALD J.ELLWOOD, DAVIDWEDDINGTON, ERIC B.
Owner URBAS DONALD J