04-10-2018 дата публикации
Номер: US20180283963A1
Принадлежит:
A temperature sensor configured to, after a predetermined number of stop counting assertions, determine the temperature dependent voltage and thus the temperature at the output of a counter. During a calibration phase, when a counter value is not equal to a test counter value in a pulse generator circuit, capacitance of the temperature sensor is adjusted until the counter value is equal to the test counter value. 1. A temperature sensor comprising: a first tunable capacitor;', 'a second tunable capacitor;', 'a first current source coupled to the first tunable capacitor;', 'a second current source coupled to the second tunable capacitor;', discharge during a first phase of operation, and', 'charge during a second phase of operation;, 'a first switch configured to couple the first tunable capacitor to, charge during the first phase of operation, and', 'discharge during the second phase of operation;, 'a second switch configured to couple the second tunable capacitor to, 'a first node coupled between the first current source and a first terminal of the first tunable capacitor;', 'a second node coupled between the second current source and a first terminal of the second tunable capacitor;, 'ramp generation circuitry including a first comparator including a first input coupled to a first ramp voltage at the first node, a second input couplable to a calibration voltage during a calibration phase and to a temperature dependent voltage during an operational phase, and an output coupled to an input of digital counter circuitry;', 'a second comparator including a first input coupled to a second ramp voltage at the second node, a second input couplable to the calibration voltage during the calibration phase and to the temperature dependent voltage during the operational phase, and an output coupled to the input of the digital counter circuitry., 'pulse generation circuitry including2. The temperature sensor of claim 1 , wherein the digital counter circuitry includes:a clock ...
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