Patent Number: 7,821,235

Title: Method for measuring a temperature in an electronic device having a battery

Abstract: A temperature sensing device can be embedded in a memory circuit in order to sense the temperature of the memory circuit. One oscillator generates a temperature variable signal that increases frequency as the temperature of the oscillator increases and decreases frequency when the temperature of the oscillator decreases. A temperature invariant oscillator generates a fixed width signal that is controlled by an oscillator read logic and indicates a temperature sense cycle. An n-bit counter is clocked by the temperature variable signal while the fixed width signal enables/inhibits the counter. The faster the counter counts, the larger the count value at the end of the sense cycle indicated by the fixed width signal. A larger count value indicates a warmer temperature. A smaller count value indicates a colder temperature.

Inventors: Lovett; Simon J. (Boise, ID)

Assignee: Round Rock Research, LLC

International Classification: H01M 10/44 (20060101)

Expiration Date: 2018-10-26 0:00:00