Patent ID: 8129956
Filing Date: 2012-03-06
Classification: G01K,H02J

Abstract:
1. A method for measuring a temperature of an electronic device comprising a chargeable battery and a DRAM having an embedded temperature sensing device, the method comprising: measuring an ambient temperature with the temperature sensing device; measuring the temperature of the battery with the temperature sensing device; performing at least one asynchronous read cycle to a predetermined memory address of the DRAM; performing at least one asynchronous write cycle comprising a data pattern that indicates an internal register of the temperature sensing circuit; reading a temperature indication off of a data bus in the DRAM; generating the temperature indication as an n-bit count value in response to output of a temperature variant oscillator received at a counter, wherein the count value is higher for warmer temperatures and lower for colder temperatures; correcting the measured battery temperature in response to the ambient temperature to produce a corrected battery temperature; and when the corrected battery temperature indicates a temperature acceleration that is greater than a predetermined threshold, reducing a charging current to the battery.