A method for a reduction of the insertion loss and provision of switch-off protection for mosfet - switch

摘要

Switch, comprising:a first field effect transistor fet, with control electrode, sources electrode, drain electrode and potential trough, in which an input signal to the drain electrode or of the sources electrode and an output signal is received in each case to the sources electrode or drain electrode is given when the first fet is switched on;a first internal current connection bus;a second fet, which is arranged such that, when the first fet is switched off, a second fet is switched on, which the potential of the trough of the first fet with the first internal current connection bus couples;a third fet, of the internal current connection bus with a positive power supply when the input signal switches to l; anda fourth fet, of the internal current connection bus with the input signal when the positive power supply on l, wherein the potential of the trough of the first fet on the higher of the positive power supply or of the a - input signal is held.