THREE-TERMINAL INVERTING HYSTERETIC TRANSISTOR SWITCH

摘要

An Inverting hysteretic transistor switch having an input terminal (13), anoutput terminal(17) and a ground terminal (15) includes, in some embodiments (11), a metal-oxidesemiconductor field effect transistor (MOSFET) having an on switching stateand an offswitching state. The MOSFET includes a drain terminal connected to the outputterminal, agate terminal and a source terminal connected to the ground terminal. Theswitch furtherincludes a hysteresis circuit (12) connected to the input terminal and to thegate terminal ofthe MOSFET. In use, with an input voltage having low-to-high and high-to-lowinputvoltage transitions applied to the input terminal, the hysteresis circuitswitches theMOSFET to its on switching state at a first threshold voltage during low-to-high inputvoltage transitions. In addition, the hysteresis circuit switches the MOSFETto its offswitching state at a second threshold voltage, which is less than the firstthreshold voltage,during high-to-low input voltage transitions.