SURGE-VOLTAGE PROTECTION CIRCUIT FOR SOLID-STATE INTEGRATED CIRCUIT OF VOLTAGE REGULATOR Russian patent published in 1998 - IPC

FIELD: on- board power networks. SUBSTANCE: upon arrival of voltage pulses whose amplitude exceeds permissible value at point 4 of protection circuit, voltage across point 1 is limited to permissible level, open transistor switch 8 limits voltage across point 2 at the same time thereby preventing turn-on of transistor switch 10 incorporated in voltage regulator while surge pulse is active; in the process, transistors 7 and 8 provide for power dissipation. EFFECT: improved reliability. 2 dwg