Patent ID: 8482330

Claim:
A temperature sensor to sense a temperature comprising: a control circuit configured to assert a start signal; a pulse generating circuit for outputting a plurality of pulses, wherein said pulse generating circuit comprises a delay circuit for controlling a pulse frequency of said plurality of pulses, a pulse width controlling circuit for controlling a pulse width of said plurality of pulses, a synchronizer with asynchronous clear configured to synchronize an output of said delay circuit, an output of said pulse width controlling circuit is configured to clear said synchronizer, wherein said delay circuit is configured to output said plurality of pulses, wherein an output of said synchronizer is configured to control an input signal of said delay circuit, wherein a pulse frequency of said plurality of pulses is at least 100 Hz, wherein a pulse frequency of said plurality of pulses is so controlled to vary with temperature; a counter circuit for generating a count value in response to said plurality of pulses generated by said pulse generating circuit at a approximately predetermined time after assertion of said start signal by said control circuit, wherein said counter is coupled to an output of said pulse generating circuit, wherein said count value generated by said counter circuit is so controlled to vary with temperature.