Temperature detector systems and methods

A temperature detector, comprising:

• (a) temperature sensing circuitry having an output that varies with a temperature to create a temperature variation, said temperature sensing circuitry including a temperature-to-time first converter, said temperature-to-time first converter outputting a time interval with length depending upon an input temperature;
• (b) calibration circuitry coupled to receive said output that varies with said temperature to create said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature, said value having a resolution, said calibration circuitry including a time-to-number second converter, said time-to-number second converter with input coupled to said temperature-to-time first converter to receive said time interval, said time-to-number second converter outputs a number version of said input temperature;
• (c) said time-to-number second converter including a second oscillator coupled to a time-to-number see, end counter, with said time-to-number second counter in response to said second oscillator input producing a digital number during said time interval;
• (d) said temperature-to-time first converter including a first oscillator with a temperature dependent period coupled to a counter for providing a temperature dependent time interval, said time interval for said counter determined by the number of oscillations counted for a predetermined count;
• and
• (e) resolution enhancement circuitry coupled to said calibration circuitry that enhances said resolution of said value.

A temperature detector, comprising:

• (a) temperature sensing circuitry having an output that varies with a temperature to create a temperature variation;
• (b) calibration circuitry electrically coupled to receive said output that varies with said temperature to create said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature;
• (c) power supply regulator circuitry electrically coupled to said temperature sensing circuitry to coordinate power to said temperature sensing circuitry;
• (d) said temperature sensing circuitry comprises a temperature-to-time first converter, said temperature-to-time first converter outputting a time interval with length depending upon an input temperature;
• (e) said temperature-to-time first converter including a first oscillator with a temperature dependent period coupled to a counter, said time interval for said counter to count a number of oscillations of said first oscillator;
• and
• (f) said calibration circuitry including a time-to-number second converter, said time-to-number second converter with input coupled to said temperature-to-time first converter to receive said time interval, said time-to-number second converter outputs a number version of said input temperature;
• (g) said time-to-number second converter including a second oscillator coupled to a time-to-number second counter, with said time-to-number second counter counting said number of oscillations produced by said second oscillator for said time interval.

A temperature detector, comprising:

• (a) temperature sensing circuitry having an output that varies with a temperature to create a temperature variation;
• (b) calibration circuitry electrically coupled to receive said output that varies with said temperature to create said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature;
• (c) power supply regulator circuitry electrically coupled to said temperature sensing circuitry to coordinate power to said temperature sensing circuitry;
• (d) said temperature sensing circuitry including a temperature-to-time first converter, said temperature-to-time first converter outputting a time interval with length depending upon an input temperature;
• (e) said calibration circuitry including a time-to-number second converter, said time-to-number second converter with input coupled to said temperature-to-time first converter to receive said time interval, said time-to-number second converter outputs a number version of said input temperature;
• (f) said time-to-number second converter approximates said number version of said input temperature by fitting a preselected mathematical model to said time interval;
• and
• (g) said preselected mathematical model is quadratic fit.

A temperature detector, comprising:

• (a) temperature sensing circuitry having an output that varies with a temperature to create a temperature variation;
• (b) calibration circuitry electrically coupled to receive said output that varies with said temperature to create said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature;
• (c) power supply regulator circuitry electrically coupled to said temperature sensing circuitry to coordinate power to said temperature sensing circuitry;
• (d) said temperature sensing circuitry including a temperature-to-time first converter, said temperature-to-time first converter outputting a time interval with length depending upon an input temperature;
• (e) said calibration circuitry including a time-to-number second converter, said time-to-number second converter with input coupled to said temperature-to-time first converter to receive said time interval, said time-to-number second converter outputs a number version of said input temperature;
• (f) said time-to-number second converter approximates said number version of said input temperature by fitting a preselected mathematical model to said time interval;
• and
• (g) said preselected mathematical model comprises an iterative, liner model and then a quadratic model.

A temperature detector, comprising:

• (a) temperature sensing circuitry having an output that varies with a temperature to create a temperature variation;
• (b) calibration circuitry electrically coupled to receive said output that varies with said temperature to create said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature;
• (c) power supply regulator circuitry electrically coupled to said temperature sensing circuitry to coordinate power to said temperature sensing circuitry;
• (d) an input to receive a reference voltage;
• (e) at least one output coupled to said temperature sensing circuitry;
• (f) first circuitry coupled to said input to provide power supply insensitive voltage output coupled to said output, said power supply insensitive voltage output is consistent with said reference voltage;
• and
• (g) said first circuitry including
• (i) a first transistor having a first source, a first drain, and a first gate, said first source coupled to a reference voltage generator;
• (ii) a second transistor having a second source, a second drain, and a second gate;
• (iii) a third transistor having a third source, a third drain, and a third gate;
• (iv) a charge pump having an output coupled to said first drain and said first gate of said first transistor;
• (v) said first gate of said first transistor coupled to said second gate of said second transistor and said third gate of said third transistor;
• and
• (vi) said second source of said second transistor and said third source of said third transistor coupled to power the first and second oscillators respectively.