A set of temperature sensors and maximum temperature selection circuit

This paper presents a maximum temperature selection circuit that cooperates with a set of temperature sensors. Two different types of temperature sensors are used: proportional to absolute temperature PTAT which uses bipolar structures and CMOS one which uses thermal dependencies of MOS transistors. This circuit is dedicated to implementation of method for optimum control of throughput (OCT method) of microprocessor. The circuit has been designed in CMOS 0.18μm technology and is a part of chip called Taceo.