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 (171 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
Gregory M Smith, Michael W Yeager, J Donald Pauley, Gary T Carroll: Power supply and power enable circuit for an RF/ID transponder. Racom Systems, Peter J Meza, William J Holland & Hart Kubida, December 26, 1995: US05479172 (105 worldwide citation)

A power supply self-contained within a portable RF/ID transponder includes a full wave rectifier having an input for receiving an antenna signal and outputs for providing power supply and ground voltages, wherein the power supply voltage has a time varying voltage waveform corresponding to the elect ...


3
Gary T Carroll, J Donald Pauley: Passive RF transponder and method. Racom Systems, William J Holland & Hart Kubida, May 14, 1996: US05517194 (100 worldwide citation)

A passive RF transponder incorporating a non-volatile memory element is powered by inductive coupling to a proximately located RF controller. A communication system and method is disclosed which utilizes the controller to send data and commands to the transponder by means of an FSK modulated RF sign ...


4
David C Howson, J Donald Pauley, Gary T Carroll: Device and method for precise subcutaneous placement of a medical instrument. Intelligent Medicine, Robert E Harris, February 14, 1989: US04804054 (96 worldwide citation)

A device and method for precise placement of a medical instrument for fluid delivery at, or withdrawal of fluid from, a predetermined location in a body is disclosed. A sensor, such as a proximity detector or electrically conductible circuitry, is implanted into the body adjacent to a predetermined ...


5
Gary T Carroll, J Donald Pauley: Programmable identification apparatus and method therefor. Robert H Holland & Hart Kelly, May 14, 1996: US05517188 (80 worldwide citation)

A programmable identification apparatus, and associated method, includes a transceiver and a transponder. The transponder is powered by the energy of a transceiver transmit signal generated by the transceiver and includes a programmable memory element. A coded sequence which uniquely identifies the ...


6
Gary T Carroll, J Donald Pauley, Michael X Bond: Communications system utilizing FSK/PSK modulation techniques. Racom Systems, William J Holland & Hart Kubida, May 28, 1996: US05521602 (65 worldwide citation)

A passive transponder incorporating non-volatile ferroelectric memory is powered by inductive coupling to a proximately located controller. A communication system and method utilizes the controller to send data and commands to the transponder by an FSK modulated RF signal in order to cause the trans ...


7
Gary T Carroll, J Donald Pauley: Enhanced peak detector. Gnuco Technology Corporation, Fitch Even Tabin & Flannery, January 14, 1997: US05594384 (48 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; ...


8
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 (29 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 ...


9
Gregory M Smith, Michael W Yeager, J Donald Pauley, Gary T Carroll: Method and apparatus for detecting an FSK encoded carrier signal. Racom Systems, Peter J Meza, William J Holland & Hart Kubida, July 2, 1996: US05533061 (27 worldwide citation)

An integrated FSK detector circuit includes a first counter that receives a carrier signal and provides a multiple-bit output for reducing the frequency of the carrier signal into a plurality of weighted sub-multiples. An oscillator enable decoder circuit provides predetermined calibrate and measure ...


10
Gary T Carroll, J Donald Pauley: FSK detector for determining an increasing time period between adjacent pulses of an FSK modulated square wave pulse train. Racom Systems, William J Holland & Hart Kubida, September 3, 1996: US05553099 (25 worldwide citation)

An FSK detector circuit and method which may be utilized for the demodulation of a digital data signal from a modulated sine wave carrier signal. A simple, low parts count FSK detector is disclosed which is readily implemented as an integrated circuit for the detection of a digital data signal in wi ...



Click the thumbnails below to visualize the patent trend.