System monitoring programmable implantable transponder
First Claim
1. A passive transponder for receiving an input signal and transmitting an output signal in response thereto comprising receive antenna means for receiving said input signal, frequency generator and modulator means for receiving said input signal from said receive antenna means and for generating said output signal, said output signal having a frequency different than said input frequency and outputting said output signal in response thereto, said input signal having a first frequency, the output signal having a second frequency being a multiple of said first frequency, said second frequency being greater than said first frequency and a transmitting antenna means for receiving said output signal from said frequency generator and modulator means and transmitting said output signal.
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Accused Products
Abstract
A passive transponder includes a receive antenna for receiving an input signal. A frequency generator and modulator receives the input signal and outputs a data carrier signal having a frequency independent of the input signal frequency. A programmable memory and thermistor are provided to produce user ID data and temperature data which is combined with the output signal.
78 Citations
9 Claims
- 1. A passive transponder for receiving an input signal and transmitting an output signal in response thereto comprising receive antenna means for receiving said input signal, frequency generator and modulator means for receiving said input signal from said receive antenna means and for generating said output signal, said output signal having a frequency different than said input frequency and outputting said output signal in response thereto, said input signal having a first frequency, the output signal having a second frequency being a multiple of said first frequency, said second frequency being greater than said first frequency and a transmitting antenna means for receiving said output signal from said frequency generator and modulator means and transmitting said output signal.
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7. A passive transponder for receiving an input signal and transmitting an output signal in response thereto comprising receive antenna means for receiving said input signal, frequency generator and a modulator means for receiving said input signal from said receive antenna means and for generating said output signal, said output signal having a frequency different than said input frequency and outputting said output signal in response thereto, said input signal having a first frequency, the output signal having a second frequency being a multiple of said first frequency, said second frequency being greater than said first frequency and a transmitting antenna means for receiving said output signal from said frequency generator and modulator means and transmitting said output signal, said frequency generator and modulator means including oscillation means for outputting a signal having a variable frequency, first divider means for dividing said input signal;
- second divider means for dividing said variable frequency signal, comparator means for comparing said divided input signal and divided variable frequency signal and producing a comparison output in response thereto, the variable frequency of the oscillation means being adjusted in response to said comparison output.
- View Dependent Claims (8, 9)
Specification