Thermistor frequency controlled electronic thermometer

Details Thermistor frequency controlled electronic thermometer Thermistor frequency controlled electronic thermometer

1983-01-21

1984-08-07

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

331 66, 331DIG3, 364557, G01K 724, G05B 1126

Patent

active

044640676

ABSTRACT:
A thermometer is disclosed which utilizes a thermistor as a temperature sensor, controlling the frequency of oscillation of an oscillator circuit. The output pulses from that circuit are frequency-divided during a fixed time interval by a variable frequency divider circuit, with the division ratio being successively varied during that interval in accordance with the cumulative number of pulses output from the variable frequency divider circuit, counted by a counter circuit, with the variations of the frequency division ratio being such as to accurately compensate for the non-linear temperature/resistance characteristic of the thermistor. The cumulative count of pulses output from the variable frequency divider circuit at the end of the fixed time interval is proportional to temperature, and is displayed as temperature by a digital display. The thermometer is suited to mass-production low-cost manufacture, yet can be miniaturized, lightweight and accurate.

REFERENCES:
patent: 3949608 (1976-04-01), Abbey et al.
patent: 4199986 (1980-04-01), Gansimeier et al.
patent: 4341117 (1982-07-01), Goldstein et al.
patent: 4359285 (1982-11-01), Washburn
patent: 4370070 (1983-01-01), Leroux
patent: 4370731 (1983-01-01), Sasaki et al.
patent: 4371271 (1983-02-01), Bellet et al.

Affiliated with

Also associated with

Rating

Thermistor frequency controlled electronic 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 Thermistor frequency controlled electronic thermometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermistor frequency controlled electronic thermometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-601764