Patent ID: 9722596
Date: 2017-08-01
CPC Classifications: H03K

Claim:
1. An electronic switch operable with a limit operating voltage, the switch including: a first transistor and a second transistor in a cascaded arrangement to provide a current flow path between an input terminal and an output terminal of the switch, the first and second transistors having a common point of said current flow path between them and a common control terminal for making the current flow path conductive and non-conductive by turning the first and second transistors on and off; a control circuit with a voltage line coupleable to a limit operating voltage, a first branch coupled between said voltage line and said common point and a second branch coupled between said voltage line and said common control terminal; wherein each said first and second branch is coupled to a further transistor activatable upon turning off the first and second transistors for coupling the respective branch of the control circuit to said voltage line, and wherein each branch includes a parallel coupling of a resistor, a diode and a string of diodes, with said diode and said string of diodes having opposed polarities; and wherein the diode in said first branch plus the string of diodes in said second branch and the diode in said second branch plus the string of diodes in said first branch provide direct polarization paths between said voltage line and said common point and said common control terminal, respectively.