TEMPERATURE SENSOR, AND TEMPERATURE MEASUREMENT METHOD THEREOF

摘要

PURPOSE: A temperature sensor and a temperature measuring method using the same are provided to reduce the power consumption of the temperature and to improve the linearity of the temperature sensor, thereby improving the accuracy of a digital output. CONSTITUTION: A temperature sensor (100) includes a bias circuit unit (200), a capacitor voltage unit (300), a pulse generator (500), and a counter unit (600). The bias circuit unit outputs a bias current which becomes increased when the temperature is increased. The capacitor voltage unit charges a capacitor (310) with the bias current and discharges the capacitor when receiving control signals. The pulse generator outputs pulses when a voltage of the capacitor is higher than a reference voltage, varies the width of the pulses, and transmits the pulses corresponding to the control signals to the counter unit. The counter unit counts the number of the pulses outputted by the pulse generating unit based on a reference frequency and digitalizes. [Reference numerals] (200) Bias circuit unit; (500) Pulse generator; (600) Counter unit; (700) Reference frequency generating unit; (AA) Reset pulse