Multi-channel pill with integrated optical interface

A system for improving the correlation between an output of a sensor and calibration data established for that sensor, comprising:

• an integrated circuit chip;
• a sensor connected to said chip for producing a first signal having a value dependent upon the measurement of a physiological parameter;
• a light detector integrated on said chip;
• means for producing light pulses for illuminating said light detector to produce a second signal stored in said chip and subsequently read out when said chip is activated, said stored signal representing the calibration data for said sensor;
• a current controlled oscillator receiving the calibration data as an input;
• a sine shaping circuit receiving an output from said oscillator for substantially attenuating any odd harmonics present in an output from said oscillator and producing an output signal;
• means for amplitude modulating said first signal by the output signal from said sine shaping circuit to produce a third signal;
• and
• means for telemetering said third signal to an external receiver.

A system for propagating a signal from a sensor located inside a human body to a point outside the body which requires correlation between an output of the sensor and calibration data established for that sensor, comprising:

• an integrated circuit chip;
• a sensor connected to said chip for producing a first signal having a value dependent upon the measurement of a physiological parameter detected within a human body;
• a light detector integrated on said chip;
• means for producing light pulses for illuminating said light detector to produce a second signal which represents the calibration data for said sensor;
• memory means for storing information from said second signal;
• and
• means for concurrently telemetering said first signal and contents of said memory means to and external receiver.

A system for propagating a signal from a sensor located inside a human body to a point outside the body which requires correlation between an output of the sensor and calibration figures for that sensor, comprising:

• an integrated circuit chip;
• a sensor connected to said chip for producing a first signal having a value dependent on the measurement of a physiological parameter detected within a human body;
• a light detector integrated on said chip;
• means for producing light pulses for illuminating said light detector to produce a second signal stored in a memory on said chip and subsequently read out when said chip is activated, said stored signal representing the calibration data for said sensor;
• a current controlled oscillator receiving said calibration data as its input;
• a sine shaping circuit receiving an output of said oscillator and substantially attenuating any odd harmonics present in the output of said oscillator;
• means for amplitude modulating said first signal by the output signal from said sine shaping circuit to produce a third signal;
• and
• means for telemetering said third signal to an external receiver.

A system for propagating a signal from a sensor located inside an enclosure to a point outside the enclosure which requires correlation between an output of the sensor and calibration data established for that sensor, comprising:

• an integrated circuit chip;
• a sensor connected to said chip for producing a first signal having a value dependent upon the measurement of a parameter inside an enclosure;
• a light detector integrated on said chip;
• means for producing light pulses for illuminating said light detector to produce a second signal which represents the calibration data for said sensor;
• memory means for storing information from said second signal;
• an external receiver;
• and
• means for telemetering said first and second signals concurrently to said receiver.

A system for improving the correlation between the output of a sensor and the calibration data established for that sensor, comprising:

• an integrated circuit chip;
• a sensor connected to said chip for producing a first signal having a value dependent upon a physical measurement;
• a light detector integrated on said chip;
• means for producing light pulses for illuminating said light detector to produce a second signal which represents the calibration data for said sensor;
• memory means for storing information from said second signal;
• an external receiver;
• means for combining said first signal and said stored information producing a third signal;
• and
• means for telemetering said third signal to said external receiver.

A method for improving the correlation between an output of a sensor and calibration data established for that sensor comprising the steps of:

• (a) providing an integrated circuit chip connected to said sensor;
• (b) integrating a light detector on said chip;
• (c) producing light pulses for illuminating said light detector at the time of manufacture of said chip to produce a signal which represents the calibration data for said sensor stored in a memory on said chip;
• and
• (d) activating said sensor at the time of installation to read out said stored signal.