MOSFET threshold switch system - has triggering level independent of trigger MOSFET threshold voltage by using six MOSFETs

摘要

The MOSFET threshold switch has its triggering level independent of the trigger MOSFETs' threshold voltage. The input signal is applied via an inverter to the trigger stage. The inverter consists of an input MOSFET (M1) with a second MOSFET (M2) forming its series load resistor. The trigger stage consists of two gate/drain cross coupled MOSFETs (M4, M5) forming a flip flop with an extra MOSFET (M6) acting as load resistor in the output drain circuit. The flip flop input drain circuit is connected via another load-resistor MOSFET (M3) to the output of the input MOSFET.