Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1985-06-18
1987-01-13
Frankfort, Charles
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
307310, 374170, 374172, 374183, G01K 716, G01K 700
Patent
active
046360921
ABSTRACT:
A diode thermometer wherein a current source is operated to cause a temperature sensing diode to be subjected to operation at a first current level and then a second current level different from the first current level. A voltage generated from the diode by the switching of the current is applied to a circuit which up integrates the voltage for a certain time interval at the conclusion of which a known reference voltage is applied to the integrator, of opposite sense to the previous signal so that the integrator now integrates in the opposite direction. A capability is provided such that the integrator starts from a zero reference level when it begins to integrate, and when it is integrating the known reference signal it returns toward this zero reference. A comparator detects return of the integrator output signal to the zero reference. A counter circuit is gated to count clock pulses during the time that the integrator integrates the known reference until the comparator detects return of the integrator output signal to the zero reference level. The count in the counter is therefore representative of the sensed temperature, and the measurement is free of influences attributable to the diode and/or the circuit, which otherwise might impair the accuracy of the measurement. Techniques are also disclosed for presenting the measurement in terms of a particular temperature scale.
REFERENCES:
patent: 3609728 (1971-09-01), Quinn
patent: 3812717 (1974-05-01), Millen et al.
patent: 3978325 (1976-08-01), Goldstein et al.
patent: 4165642 (1979-08-01), Lipp
patent: 4228684 (1980-10-01), Templin
patent: 4418339 (1983-11-01), Spofford, Jr. et al.
patent: 4448549 (1984-05-01), Hashimoto et al.
patent: 4497586 (1985-02-01), Nelson
Frankfort Charles
Will Thomas B.
LandOfFree
Diode thermometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diode thermometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diode thermometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2352885