Abstract: A voltage regulator system is provided, which receives a first voltage and produces a regulated voltage. Such a device does not include any transistor supporting the first voltage, but does include transistors supporting at most a second voltage lower than the first voltage and includes division means, which include a first transistor connected in series with at least one second transistor, which division means receive the first voltage and generate the regulated voltage.

Abstract: A device for converting a continuous supply voltage into a continuous output voltage includes at least one inductor accumulating energy during an accumulation time and delivering said accumulated energy during a discharge time, so that said output voltage has a value that is greater than or equal to that of said supply voltage. An oscillator controls said accumulation and discharge times, in which a period is equal to a sum of said accumulation time and said discharge time and a cyclic ratio is equal to the ratio of said accumulation time to said period. The oscillator includes a mechanism for controlling said period and said cyclic ratio according to said supply voltage and said output voltage.

Abstract: A device is provided for resetting an integrated circuit generating a reset signal after a power supply voltage drop to a very low level has been detected. Such a device includes at least one control means, the state of which (conducting or non-conducting) is controlled by a control voltage equal to the difference between the power supply voltage and a predetermined offset voltage, such that if the control voltage is less than or equal to a threshold, the control means authorizes activation of the means for generating a reset signal.

Abstract: A device for converting a continuous supply voltage into a continuous output voltage includes at least one inductor accumulating energy during an accumulation time and delivering said accumulated energy during a discharge time, so that said output voltage has a value that is greater than or equal to that of said supply voltage. An oscillator controls said accumulation and discharge times, in which a period is equal to a sum of said accumulation time and said discharge time and a cyclic ratio is equal to the ratio of said accumulation time to said period. The oscillator includes a mechanism for controlling said period and said cyclic ratio according to said supply voltage and said output voltage.

Abstract: The invention concerns an integrated circuit comprising means of delivering, on at least one output, a predetermined output voltage representative of a logic level, means of distributing a mains voltage and means of generating an internal voltage reference lower than the mains voltage, comprising means of connecting the mains voltage to the output and means of limiting and/or detecting the voltage at the output at the predetermined output voltage value, taking into account the reference voltage.

Abstract: A voltage regulator system is provided, which receives a first voltage and produces a regulated voltage. Such a device does not include any transistor supporting the first voltage, but does include transistors supporting at most a second voltage lower than the first voltage and includes division means, which include a first transistor connected in series with at least one second transistor, which division means receive the first voltage and generate the regulated voltage.

Abstract: A device is provided for resetting an integrated circuit generating a reset signal after a power supply voltage drop to a very low level has been detected. Such a device includes at least one control means, the state of which (conducting or non-conducting) is controlled by a control voltage equal to the difference between the power supply voltage and a predetermined offset voltage, such that if the control voltage is less than or equal to a threshold, the control means authorizes activation of the means for generating a reset signal.

Abstract: The invention concerns a microelectronic circuit for activation or respectively deactivating at least one second input/output (2, 3), or second “buffer”, which receives a deactivation command (21, 31) corresponding to a combination of a general activation, or respectively deactivation, command (StopPadB) and of an information item representing the activated, or respectively deactivated, state (12, 22) of at least a first buffer, so that the said second buffer(s) is/are only activated, or respectively deactivated, when the said first buffer(s) is/are already activated, or respectively deactivated, to keep to a predetermined sequence of activation, or respectively deactivation, of the said buffers (1, 2, 3).

Abstract: The invention concerns an integrated circuit comprising means of delivering, on at least one output, a predetermined output voltage representative of a logic level, means of distributing a mains voltage and means of generating an internal voltage reference lower than the mains voltage, comprising means of connecting the mains voltage to the output and means of limiting and/or detecting the voltage at the output at the predetermined output voltage value, taking into account the reference voltage.

Abstract: A power supply controller for electronic circuits, supplying a power supply voltage (VDC) and preventing operation of the said circuit by using a RESET signal when the said power supply voltage is less than a first predetermined threshold. The controller includes a first comparator (C2) comparing a voltage proportional to the power supply voltage with a reference voltage and activating the reset signal when the voltage proportional to the power supply voltage is less than the reference voltage. A bandgap module supplies a principal reference voltage (VBGAP). Preliminary reference devices immediately supply a preliminary reference voltage (V09), less than the principal reference voltage. Control circuits receive the preliminary reference voltage (V09) and the principal reference voltage (VBGAP) and automatically activate the RESET signal for as long as the principal reference voltage (VBGAP) has not reached a second predetermined threshold.

Abstract: A device generating a precise reference voltage. This device comprises a semiconductor circuit (1) of “bandgap” type delivering a reference voltage (Vref) and a multiplier circuit (2) delivering an output voltage (VOUT) from the reference voltage. A galvanic link (3) makes it possible to supply the semiconductor circuit (1) from the precise reference voltage, and an initialization circuit (4) makes it possible, on initialization, to replace this precise reference voltage with the build-up voltage of the supply voltage. Application to reference voltage generating circuits of analogue/digital converter circuits in CMOS technology.

Abstract: A power supply controller for electronic circuits, supplying a power supply voltage (VDC) and preventing operation of the said circuit by using a RESET signal when the said power supply voltage is less than a first predetermined threshold. The controller includes a first comparator (C2) comparing a voltage proportional to the power supply voltage with a reference voltage and activating the reset signal when the voltage proportional to the power supply voltage is less than the reference voltage. A bandgap module supplies a principal reference voltage (VBGAP). Preliminary reference devices immediately supply a preliminary reference voltage (V09), less than the principal reference voltage. Control circuits receive the preliminary reference voltage (V09) and the principal reference voltage (VBGAP) and automatically activate the RESET signal for as long as the principal reference voltage (VBGAP) has not reached a second predetermined threshold.

Abstract: The invention relates to a slaved supply for slave element tied by a serial link to a master element. The slaved supply comprises a slave module for regulating the supply voltage comprising a module (1) for sampling and for detecting the peak value of the master digital output signals delivering a sampled peak value of the master output signals and a module (2) for slaving the slave supply voltage to a value substantially equal to that of the sampled peak value of the master output signals. The slave output signals delivered exhibit a peak amplitude matched to that of the master output signals. Application to the supply of master slave circuits in mobile or fixed telephony.

Abstract: The invention relates to a device generating a precise reference voltage.

Abstract: The invention relates to a slaved supply for slave element tied by a serial link to a master element. The slaved supply comprises a slave module for regulating the supply voltage comprising a module (1) for sampling and for detecting the peak value of the master digital output signals delivering a sampled peak value of the master output signals and a module (2) for slaving the slave supply voltage to a value substantially equal to that of the sampled peak value of the master output signals. The slave output signals delivered exhibit a peak amplitude matched to that of the master output signals. Application to the supply of master slave circuits in mobile or fixed telephony.

Abstract: A device for generating a low-consumption controlling analogue voltage of stable value adapted for controlling LCD display segments that comprises an input circuit receiving an analogue voltage of given nominal value adapted to generate a picture analogue voltage of reduced value in a ratio k. A driver circuit is provided to receive the picture analogue voltage as a reference signal and a picture signal derived and reduced in the same ratio k from the low-consumption analogue voltage and comprises a differential amplifier supplied with a first and a second constant voltage value for outputting a first and a second switch control pulse. A switching circuit comprising a first switching branch outputting an amplified auxiliary switch control pulse synchronous with the reference signal and a second switching branch controlled by the amplified auxiliary switch control pulse is adapted to outputting the low-consumption analogue voltage switched to the analogue voltage of given value.