Patent ID: 8564353

Claim:
A temperature sensitive device comprising: a first delay unit for receiving an input signal and for introducing a first time delay into the input signal so as to generate a first delayed signal, wherein the first time delay is dependent on a manufacturing process of said temperature sensitive device and is substantially independent of a temperature sensed by said temperature sensitive device; a second delay unit for receiving the input signal and for introducing a second time delay into the input signal so as to generate a second delayed signal, wherein the second time delay is dependent on the manufacturing process of said temperature sensitive device and the temperature sensed by said temperature sensitive device, and wherein the first time delay and the second time delay are substantially the same when the temperature sensed by said temperature sensitive device is at a first temperature value; a difference generating unit electrically coupled to said first delay unit and said second delay unit so as to receive the first delayed signal and the second delayed signal therefrom, said difference generating unit generating an indication signal according to the first delayed signal and the second delayed signal, the indication signal indicating a difference between the first time delay and the second time delay; and a processing unit electrically coupled to said difference generating unit so as to receive the indication signal therefrom, said processing unit generating an output signal according to the indication signal and a reference signal, wherein the reference signal indicates a difference between the first time delay and the second time delay when the temperature sensed by said temperature sensitive device is at a second temperature value, and the output signal is dependent on the temperature sensed by said temperature sensitive device and is substantially independent of the manufacturing process of said temperature sensitive device.