Abstract: The invention relates to integrated electronic circuits in MOS technology that have to be supplied by a cell or a battery that have a relatively high voltage capable of destroying the circuit in the event of a battery connection error, most particularly when a negative voltage is connected to an output of the integrated circuit. The logic output stage connected to this output comprises two pMOS transistors in series operating in push-pull mode under the control of the logic input signal, a first transistor being connected to a high supply terminal of the integrated circuit and the second transistor to a low supply terminal; the output is taken at the junction point of the two transistors. A conduction control circuit, capable of applying a negative voltage relative to the low supply terminal to the gate of the second transistor when the logic input signal passes to a level tending to turn off the first transistor, is interposed between the input and the gate of the second transistor.

Abstract: The invention relates to a temperature-independent voltage reference circuit. The circuit comprises a first circuit of bandgap type providing a first-order temperature-stable voltage, on the basis of a bipolar transistor base-emitter voltage having a negative slope of variation as a function of temperature, and of a voltage or a current having a positive slope of variation as a function of temperature provided by a generator of current proportional to absolute temperature. The base currents of the PMOS transistors thereof are compensated in such a manner that the output current is proportional to a collector current and not an emitter current.