Temperature Measurement Circuitry and Method

摘要

A method includes alternately coupling a selected one of a plurality of current sources and two or more of the plurality of current sources to a first terminal of a bipolar device during first and second phases of a modulator cycle of a plurality of modulator cycles. The method further includes providing sampled voltages from the first terminal of the bipolar device to a modulator to produce a modulator output signal, filtering the modulator output signal to produce a filtered output signal using a back-end filter having an impulse response, and determining a temperature in response to the filtered output signal.

主权项

1. A method comprising:
controlling a current source circuit including a plurality of current sources to alternately couple a selected one of the plurality of current sources and two or more of the plurality of current sources to a first input of a bipolar device during first and second phases of a modulator cycle of a plurality of modulator cycles; sampling voltages from the first input of the bipolar device using a sampling circuit; providing sampled voltages from the sampling circuit to an input of a modulator configured to produce a modulator output signal based on the sampled voltages; filtering the modulator output signal to produce a filtered output signal using a back-end filter having a programmable impulse response; and determining, using a temperature determination circuit, a temperature in response to the filtered output signal.