Patent ID: 7348830
Filing Date: 2008-03-25
Classification: G05F

Abstract:
1. A starter circuit designed to ensure the automatic start-up of a biasing circuit following an interruption in the operation of the latter, comprising: an integrated circuit substrate of a first type of conductivity comprising: a well of an opposite type of conductivity and a semiconductor region of the same type of conductivity as the substrate, formed within the well and forming a p-n junction with the well, a first transistor, for detecting the operating condition of the biasing circuit, connected to the biasing circuit so as to be in the on state when the biasing circuit is operating normally and turned off in cases of abnormal operation, said transistor being placed in series with the p-n junction between two power supply terminals, the semiconductor region being connected to one of the power supply terminals, a drain of the first transistor being connected to the well by a conductor, a second transistor, or restart activation transistor, whose gate is connected to the drain of the first transistor, the second transistor being turned off by the switching on of the first transistor and being turned on by the existence of leakage currents from the p-n junction when the first transistor is in the off state.