Patent US1002455A successfully refreshed from Google Patents.
US5638418A
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US
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Temperature detector systems and methods
Assignee: Maxim Integrated Products Inc
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Filing: 1994-06-07
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Granted: 1997-06-10
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Expires: 2014-06-07
Abstract
Abstract A temperature detector comprises temperature sensing circuitry calibration circuitry, and power regular circuitry. The temperature sensing circuitry has an output that varies with a temperature to create a temperature variation. The calibration circuitry is coupled to receive the output that varies with temperature to create a temperature variation. The calibration circuitry interprets the temperature variation and outputs a value that represents the temperature. The power supply regulator circuitry coordinates power to the temperature sensing circuitry. Alternate embodiments of the temperature detector comprise temperature sensing circuitry, calibration circuitry, and resolution enhancement circuitry. The temperature sensing circuitry has an output that varies with a temperature to create a temperature variation. The calibration circuitry is coupled to receive the output that varies with temperature to create a temperature variation. The calibration circuitry also interprets the temperature variation and outputs a value that represents the temperature. The value has a resolution. The resolution enhancement circuitry is coupled to the calibration circuitry that enhances the resolution of the value.
Inventors
- 👤 James M. Douglass
- 👤 Gary V. Zanders
- 👤 Donald R. Dias
- 👤 Robert D. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:17
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/028; G01K7/00; G01K7/16; G01K7/22; G01K7/24; G01K7/245; G06; G06F; G06F1/00; G06F1/16; G06F1/20; G06F1/206
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
194 words
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 cream said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature; (c) 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; (d) 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; (e) said time-to-number second converter including a second oscillator coupled to a time-to-number second counter, with said time-m-number second counter in response to said second oscillator input producing digital number during said time interval; and (f) 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.
Claim 2
Dependent Claim
194 words
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 cream said temperature variation, said calibration circuitry interprets said temperature variation, outputs a value that represents said temperature; (c) 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; (d) 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; (e) said time-to-number second converter including a second oscillator coupled to a time-to-number second counter, with said time-m-number second counter in response to said second oscillator input producing digital number during said time interval; and (f) 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.
Claim 3
Dependent Claim
40 words
The temperature detector of claim 1, wherein said time-to-number second converter includes 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.
Claim 4
Dependent Claim
28 words
The temperature detector of claim 2, further comprising: (a) power supply regulator circuitry electrically coupled to said temperature sensing circuitry to coordinate power to said temperature sensing circuitry.
Claim 5
Dependent Claim
44 words
The temperature detector of claim 3, wherein: (a) said time-to-number second converter comprises a prescaler between said second oscillator and said time-to-number second counter, said prescaler blocking a fraction of said number of oscillations from said second oscillator from driving said time-to-number second counter.
Claim 6
Dependent Claim
166 words
The temperature detector of claim 3, further comprising: (a) an output temperature register; and (b) a repetition controller coupled to said temperature-to-time first converter and said time-to-number second converter and said output temperature register; (c) wherein during said time interval said repetition controller first (i) loads a base count into said time-to-number second counter and a base temperature into said output temperature register, next (ii) when said time-to-number second counter has counted down said base count, said repetition controller loads a slope count into said time-to-number second counter, then (iii) when said time-to-number second counter has counted down said slope count, said repetition controller increments said base temperature in said output temperature register and loads a second slope count into said time-to-number second counter, and (iv) said repetition controller repeats incrementing said base temperature stored in said output temperature register and loading said slope count into said time-to-number second counter and loading said second slope count into said time-to-number second counter until said time interval expires.
Claim 7
Dependent Claim
27 words
The temperature detector of claim 5, wherein: (a) said time-to-number second converter comprises a slope incrementer coupled to said time-to-number second counter and to said repetition controller.
Claim 8
Dependent Claim
42 words
The temperature detector of claim 2, further wherein said time-to-number second converter has at least one output terminal, said at least one output terminal coupled to an electrical device selected from the group consisting of microcontrollers and microprocessors, and/or any combination thereof.
Claim 9
Dependent Claim
32 words
The temperature detector of claim 2, wherein said number version outputted by said time-to-number second converter is a binary representation of said temperature detector in standard units of measurement of said temperature.
Claim 10
Dependent Claim
18 words
The temperature detector of claim 3, wherein said second oscillator of said time-to-number second converter is not variable.
Claim 11
Dependent Claim
29 words
The temperature detector of claim 2, wherein said time-to-number second converter approximates said number version of said input temperature by fitting a preselected mathematical model to said time interval.
Claim 12
Dependent Claim
14 words
The temperature detector of claim 10, wherein said preselected mathematical model is quadratic fit.
Claim 13
Dependent Claim
21 words
The temperature detector of claim 10, where said preselected mathematical model comprises an iterative, linear model and then a quadratic model.
Claim 14
Dependent Claim
34 words
The temperature detector of claim 3, wherein said second oscillator has a temperature dependent period and said time-to-number second converter comprises prescaler circuitry to transform said temperature dependent period into a temperature independent period.
Claim 15
Dependent Claim
29 words
The temperature detector of claim 13, wherein said prescaler circuitry transforms said temperature dependent period into said temperature independent period by scaling said time interval by a preselected factor.
Claim 16
Dependent Claim
22 words
The temperature detector of claim 14, wherein said preselected factor correspond to a change in said temperature from a preselected maximum temperature.
Claim 17
Dependent Claim
26 words
The temperature detector of claim 8, wherein said standard units of measurement of said temperature are selected from the group consisting of Celsius and Fahrenheit degrees.
Claim 18
Dependent Claim
48 words
The temperature detector of claim 2 further comprising: control circuitry coupled to said temperature-to-time first converter and to said time-to-number second converter to activate said temperature-to-time first converter and said time-to-number second converter and to synchronize communication between said temperature-to-time first converter and to said time-to-number second converter.
Claim 19
Dependent Claim
14 words
The temperature detector of claim 2, wherein said time-to-number second converter is continuously running.
Claim 20
Dependent Claim
32 words
The temperature detector of claim 1, wherein said power supply regulator circuitry regulates said power supplied by a power supply so that said power from a primary power source does not vary.
Claim 21
Dependent Claim
23 words
The temperature detector of claim 19, wherein said primary power source supplies said power that is approximately equal or greater than 3 volts.
Claim 22
Dependent Claim
57 words
The temperature detector of claim 1, comprises (c1) an input to receive a reference voltage; (c2) at least one output coupled to said temperature sensing circuitry; and (c3) 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.
Claim 23
Dependent Claim
130 words
The temperature detector of claim 21, wherein said first circuitry comprising a first transistor having a first source, a first drain, and a first gate, said first source coupled to a reference voltage generator; a second transistor having a second source, a second drain, and a second gate; a third transistor having a third source, a third drain, and a third gate; a charge pump having an output coupled to said first drain and said first gate of said first transistor; 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 said second source of said second transistor and said third source of said third transistor coupled to power the first and second oscillators respectively.
Claim 24
Dependent Claim
30 words
The temperature detector of claim 1, wherein said value has a resolution and further comprising resolution enhancement circuitry coupled to said calibration circuitry that enhances said resolution of said value.
Claim 25
Dependent Claim
16 words
The temperature detector of claim 23, further comprising software means executed by said resolution enhancement circuitry.
Claim 26
Dependent Claim
214 words
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.
Claim 27
Dependent Claim
214 words
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.
Claim 28
Dependent Claim
16 words
The temperature detector of claim 25, further comprising software means executed by said resolution enhancement circuitry.
Claim 29
Dependent Claim
206 words
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.
Claim 30
Dependent Claim
206 words
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.
Claim 31
Dependent Claim
44 words
The temperature detector of claim 27, wherein: (a) said time-to-number second converter includes a prescaler between said second oscillator and said time-to-number second counter, said prescaler blocking a fraction of said number of oscillations from said second oscillator from driving said time-to-number second counter.
Claim 32
Dependent Claim
166 words
The temperature detector of claim 27, further comprising: (a) an output temperature register; and (b) a repetition controller coupled to said temperature-to-time first converter and said time-to-number second converter and said output temperature register; (c) wherein during said time interval said repetition controller first (i) loads a base count into said time-to-number second counter and a base temperature into said output temperature register, next (ii) when said time-to-number second counter has counted down said base count, said repetition controller loads a slope count into said time-to-number second counter, then (iii) when said time-to-number second counter has counted down said slope count, said repetition controller increments said base temperature in said output temperature register and loads a second slope count into said time-to-number second counter, and (iv) said repetition controller repeats incrementing said base temperature stored in said output temperature register and loading said slope count into said time-to-number second counter and loading said second slope count into said time-to-number second counter until said time interval expires.
Claim 33
Dependent Claim
27 words
The temperature detector of claim 29, wherein: (a) said time-to-number second converter comprises a slope incrementer coupled to said time-to-number second counter and to said repetition controller.
Claim 34
Dependent Claim
18 words
The temperature detector of claim 27, wherein said second oscillator of said time-to-number second converter is not variable.
Claim 35
Dependent Claim
34 words
The temperature detector of claim 27, wherein said second oscillator has a temperature dependent period and said time-to-number second converter comprises prescaler circuitry to transform said temperature dependent period into a temperature independent period.
Claim 36
Dependent Claim
29 words
The temperature detector of claim 32, wherein said prescaler circuitry transforms said temperature dependent period into said temperature independent period by scaling said time interval by a preselected factor.
Claim 37
Dependent Claim
22 words
The temperature detector of claim 33, wherein said preselected factor corresponds to a change in said temperature from a preselected maximum temperature.
Claim 38
Dependent Claim
22 words
The temperature detector of claim 27, wherein said temperature-to-time first converter and said time-to-number second converter are combined into an integrated circuit.
Claim 39
Dependent Claim
27 words
The temperature detector of claim 27, wherein said temperature sensing circuitry, said calibration circuitry, and said power supply regulator circuitry are combined into a single integrated circuit.
Claim 40
Dependent Claim
42 words
The temperature detector of claim 27, further wherein said time-to-number second converter has at least one output terminal, said at least one output terminal coupled to an electrical device selected from the group consisting of microcontrollers and microprocessors, and/or any combination thereof.
Claim 41
Dependent Claim
32 words
The temperature detector of claim 27, wherein said number version outputted by said time-to-number second converter is a binary representation of said temperature detector in standard units of measurement of said temperature.
Claim 42
Dependent Claim
26 words
The temperature detector of claim 38, wherein said standard units of measurement of said temperature are selected from the group consisting of Celsius and Fahrenheit degrees.
Claim 43
Dependent Claim
48 words
The temperature detector of claim 27 further comprising: control circuitry coupled to said temperature-to-time first converter and to said time-to-number second converter to activate said temperature-to-time first converter and said time-to-number second converter and to synchronize communication between said temperature-to-time first converter and to said time-to-number second converter.
Claim 44
Dependent Claim
14 words
The temperature detector of claim 27, wherein said time-to-number second converter is continuously running.
Claim 45
Dependent Claim
32 words
The temperature detector of claim 27, wherein said power supply regulator circuitry regulates said power supplied by a power supply so that said power form a primary power source does not vary.
Claim 46
Dependent Claim
23 words
The temperature detector of claim 42, wherein said primary power source supplies said power that is approximately equal or greater than 3 volts.
Claim 47
Dependent Claim
55 words
The temperature detector of claim 27, further comprising: an input to receive a reference voltage; at least one output coupled to said temperature sensing circuitry; and 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.
Claim 48
Dependent Claim
30 words
The temperature detector of claim 27, wherein said value has a resolution and further comprising resolution enhancement circuity coupled to said calibration circuitry that enhances said resolution of said value.
Claim 49
Dependent Claim
16 words
The temperature detector of claim 45, further comprising: software means executed by said resolution enhancement circuitry.
Claim 50
Dependent Claim
29 words
The temperature detector of claim 27, wherein said time-to-number second converter approximates said number version of said input temperature by fitting a preselected mathematical model to said time interval.
Claim 51
Dependent Claim
169 words
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.
Claim 52
Dependent Claim
169 words
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.
Claim 53
Dependent Claim
176 words
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.
Claim 54
Dependent Claim
176 words
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.
Claim 55
Dependent Claim
254 words
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.
Claim 56
Dependent Claim
254 words
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.
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