RING OSCILLATOR FOR TEMPERATURE SENSOR, TEMPERATURE SENSOR CIRCUIT AND SEMICONDUCTOR DEVICE PROVIDED WITH SUCH TEMPERATURE SENSOR CIRCUIT

摘要

Each ring oscillator (1) includes an inverter, and is composed of an odd number of unit circuits (2) connected in series. The unit circuit (2) is, for instance, composed of the inverter and a MOSFET (Q13). The MOSFET (Q13) is a temperature sensor and is a FET using a leak current between a drain and a source in a normally off state.