1
Gary T Carroll, J Donald Pauley: Electronic identifier apparatus and method utilizing a single chip microcontroller and an antenna coil. Gnuco Technology Corporation, Fitch Even Tabin & Flannery, September 13, 1994: US05347263 (175 worldwide citation)

Low cost, compact electronic identifier apparatus interrogates a passive (no external power) or active (external power) transponder. Such identifier apparatus and transponder(s) may be used, e.g., for: (1) access control, (2) animal feeding and animal health, (3) inventory control, (4) process contr ...


2
Gary T Carroll, J Donald Pauley: Enhanced peak detector. Gnuco Technology Corporation, Fitch Even Tabin & Flannery, January 14, 1997: US05594384 (49 worldwide citation)

An enhanced peak detector circuit for the amplitude demodulation of an incoming amplitude modulated signal is provided. In its simplest form, the enhanced peak detector circuit includes a forward biased NPN transistor, a peak detecting segment coupled to the base-emitter junction of the transistor; ...


3
Gary T Carroll, J Donald Pauley: Modified Colpitts oscillator for driving an antenna coil and generating a clock signal. GnuCo Technology Corporation, Fitch Even Tabin & Flannery, April 29, 1997: US05625327 (30 worldwide citation)

A Colpitts-type oscillator circuit suitable for use with electronic identification systems is disclosed. The oscillator circuit utilizes a pair of transistors coupled together with a feedback loop that includes a parallel LC circuit such that the output amplitude can be as high as a factor of 20 tim ...



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