IC switch stage circuit with internal voltage supply has control circuit used for initializing switch stage during power-up

摘要

The circuit has a terminal (33) receiving an external supply voltage (VEXT), used for operation of a voltage generator (3) having an internal voltage supply terminal (31), used for operation of a switch stage (1) having at least 2 transistors (10,11) with their current paths connected in series. One of the transistors is controlled by a logic signal (Q), the other controlled by a bias signal (ENB) provided by a control circuit (2) with a first inverter (21) using complementary transistors, coupled to a second inverter (25) with a bias signal output.