1
Andrea Milanesi, Vanni Poletto, Alberto Poma, Marco Morelli: Control circuit for power transistors in a voltage regulator. SGS Thomson Microelectronics S r l, Magneti Marelli S p A, Theodore E Allen Dyer Doppelt Milbrath & Gilchrist P A Galanthay, March 21, 2000: US06040736 (20 worldwide citation)

A voltage-regulator circuit with a low voltage drop uses a DMOS power transistor driven by a charge pump. The control circuit includes two feedback loops: a first feedback loop having a high gain and accuracy but low response speed, and a second feedback loop having a wide passband and fast response ...


2
Vanni Poletto, Marco Morelli: Low-drop voltage regulator. SGS Thomson Microelectronics S r l, Wolf Greenfield & Sacks, December 13, 1994: US05373225 (20 worldwide citation)

A low-drop voltage regulator includes a P-type power transistor having an input terminal connected to a supply source, an output terminal connected to a load, and a control terminal driven by the output of an operational amplifier having its non-inverting input connected to a reference voltage sourc ...


3
Alberto Poma, Vanni Poletto, Marco Morelli: Circuit for controlling the maximum current in a MOS power transistor used for driving a load connected to earth. SGS Thomson Microelectronics S r l, Robert Groover, April 4, 1995: US05404053 (19 worldwide citation)

An improved circuit for controlling the maximum current in a MOS power transistor, in which resistor is in series with the drain-source path of the MOS power transistor. The supply terminal of a transconductance operational amplifier is connected to the output of a voltage-raising or charge pump cir ...


4
Vanni Poletto, Marco Morelli, Bruno Murari: Low-drop voltage regulator. SGS Thomson Microelectronics S r l, Townsend and Townsend Khourie and Crew, January 18, 1994: US05280233 (17 worldwide citation)

A voltage regulator comprising a first power switch connected between the input terminal and output terminal; a storage condenser connected to the input terminal via a one-way switch; a second power switch connected between the condenser and the input terminal; and a regulating element connected to ...


5
Michel Chapotot, Bernard Marteau, Vanni Poletto, Alberto Poma, Xavier Philippon: Circuit for processing the output signal from a resistive analog sensor, in particular for the fuel gauge of a motor vehicle, and systems fitted therewith. Jacobson Price Holman & Stern, May 21, 1996: US05519397 (16 worldwide citation)

The present invention relates to a circuit for processing the output signal from a resistive analog sensor, comprising firstly a digital filter, and secondly a module forming a digital-to-impedance converter, which filter and module are interposed in series between the output of the sensor and the i ...


6
Alberto Poma, Vanni Poletto, Marco Morelli: H-bridge circuit with protection against crossover conduction. SGS Thomson Microelectronics S R L, Marelli Autronica S p A, Robert Groover, May 3, 1994: US05309347 (14 worldwide citation)

An H-bridge circuit which includes four power transistors (an npn pull-down and a pnp pull-up for each of the output terminals). Two control circuits are connected to drive these transistors in a complementary crossover configuration, so that each control circuit can turn on the pull-up transistor o ...


7
Vanni Poletto, Michelangelo Mazzucco: Comparator circuit with precision hysteresis and high input impedance. Marelli Autronica S p A, SGS Thomson Microelectronics s r l, Seed and Berry, May 17, 1994: US05313114 (14 worldwide citation)

The amplitude of the hysteresis of the circuit is determined principally by the intensity of the current produced by a generator by means of a "band gap" reference voltage, an internal resistance of the circuit, and the resistances connected to the emitters of the input-stage transistors, enabling a ...


8
Vanni Poletto: Switching voltage regulator for an interface circuit in a telephone subscriber line. SGS Thomson Microelectronics S r l, Rosen Dainow & Jacobs, March 13, 1990: US04908856 (14 worldwide citation)

A so-called switching voltage regulator for an interface circuit in a telephone subscriber line, being of a type adapted to control the on/off states of an electronic switch, connected to the interface circuit and consisting of first and second transistors interconnected into a Darlington arrangemen ...


9
Vanni Poletto: Low bias, high slew rate operational amplifier. SGS Thomson Microelectronics, Richard K Robinson, Kenneth C Hill, June 19, 1990: US04935703 (13 worldwide citation)

A bias current source for the output stage of an operational amplifier is controllable. The bias current generator senses the voltage differential on the differential operational amplifier inputs. When an input differential voltage is sensed which generates a rising output signal, additional bias cu ...


10
Francesco Colandrea, Vanni Poletto: Overload protection circuit for MOS power drivers. SGS Thomson Microelectronics S r l, James H Morris, Wolf Greenfield & Sacks P C, May 5, 1998: US05747975 (12 worldwide citation)

The circuit includes two regulating loops connected in parallel to each other. A slow regulating loop presents a lower first intervention threshold, and a fast regulating loop has a higher second intervention threshold. The slow regulating loop is low-gain and frequency-stable for accurately control ...