Abstract The modern information technology three big foundations areinformation gathering (namely sensor technology), the intelligencetransmission (communication) and the information processing (computertechnology). The sensor belongs to the information technology the frontstate-of-the-art product, the temperature sensor type day by day is inparticular many, the digital temperature sensor when is suitable hasto each kind of microprocessor connection composition automatictemperature control system may overcome simulates the sensor and themicroprocessor connection needs the signal to recuperate electriccircuit and A/D switch merit and so on malpractice,Is widely applied to the industry control, the electronic clinicalthermometer, the temperature-measuring device and so on in each kindof temperature control system. The intelligent temperature sensor(also called digital temperature sensor) is published in the 1990sintermediate stages. It is the micro electron technology, the computertechnology and the test automation technology (ATE) crystallization.Their interior all contains the temperature sensor, the A/D switch,the signal processor, the memory (or register) and the connectionelectric circuit. Some products also bring the multichannel selector,the central controller (cpu), the random access memory (RAM) and thenon-erasable storage (ROM).
The intelligent temperature sensor characteristic is can output thetemperature data and the correlation temperature control quantity,suitably matches each kind of micro controller (MCU); And it isrealizes the test function in the hardware foundation throughsoftware, its intellectualized degree also is decided by the softwaredevelopment level. Speaking of certain intelligent temperature sensors, the monolithicintegrated circuit also passable corresponding register hasestablished its A/D transformation speed (typical product is MAX6654),the resolving power and the biggest switching time (typical product isDS1624).
Key word Electronic clinical thermometer Intelligent temperature sensor Monolithic integrated circuit