| 摘要 |
PROBLEM TO BE SOLVED: To provide a PDM output type temperature sensor with which the area thereof is reduced and the power consumption thereof can reduced. SOLUTION: The PDM output type temperature sensor includes a power supply terminal 45, a grounding terminal 46 and an output terminal 47, as well as, includes nodes N1-N8. The sensor includes constant current sources 11-12, PNPs (PNP bipolar transistors) 13-14, switches 15-18, switches 21-25, switches 31-35, capacitances 26-28, capacitances 36-38, an amplifier 41, a comparator 42, a latch 43, an inverter 44 and an oscillation circuit 51. The sensor is constituted of the comparator, of which the output terminal is connected to the input terminal of the latch, the latch of which the output terminal is connected to the input terminal of the inverter, the inverter of which the output terminal is connected to the output terminal of the sensor, and the oscillation circuit which controls each switch and the latch. COPYRIGHT: (C)2010,JPO&INPIT |
