三漏CMOS磁敏开关的设计

Design of triple-drain CMOS magnetic sensitive switch

介绍了一种新型的磁敏开关。它的磁敏感部分由2个互补的三漏MOS晶体管组成,将恒流源、放大器、施密特触发器和输出驱动管等电路集成在同一块芯片上。该磁敏开关具有稳定性能好、灵敏度高、功耗低、抗干扰等优点,单端输出灵敏度可达4V/T。由于采用了现有的硅栅CMOS工艺,实现起来更加容易。

A novel magnetic-field sensitive switch is presented.The part of magnetic-field sensor has a magnetic-field sensitive device with complement triple-drain MOS transistor.The magnetic-field sensitive switch is integrated with the constant current source,amplifier circuits,Schmitt trigger and output driver transistor on a same chip.The switch has the advantage of good stability,high magnetic sensitivity,low power consumption,anti-interference and so on.The single-ended output sensitivity is 4 V/T.Due to adopting standard CMOS process,it is easy to produce.