Selective temperature control system
USRE33119E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Mar 7, 2008 |
Classification
- Technology area (CPC —)General
Abstract
A method and apparatus is disclosed for determining the temperature to which a thermistor is exposed. A capacitor is charged through a reference resistor and the length of time required to charge the capacitor to a predetermined level is measured to obtain a reference charge time. The capacitor is discharged, and then charged through the thermistor and the length of time required to charge the capacitor to the predetermined level through the thermistor is measured to obtain a temperature charge time. The temperature to which the thermistor is exposed is determined by computing the difference between the reference charge time and the temperature charge time divided by the sum of the times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.