1
Paolo Menegoli: BEMF rectification voltage when power supply energy fails. SGS THOMSON Microelectronics, Richard A Bachand, Rodney M Anderson, Lisa K Jorgenson, April 2, 1996: US05504402 (41 worldwide citation)

In a disk drive, the read-write heads of the disk drive should be parked during a power failure. The kinetic energy of the spinning rotor is used to move the head away from the disk's surface. A high voltage is produce from the low voltage spindle motor by using a BEMF voltage to step up the voltage ...


2
Francesco Carobolante, Paolo Menegoli: Method and circuit for determining the velocity of a data detector mechanism of a mass storage device, or the like, using a BEMF voltage in the associated voice coil. STMicroelectronics, David V Carlson, Theodore E Galanthay, Lisa K Jorgenson, June 27, 2000: US06081112 (41 worldwide citation)

A circuit and method for measuring a back EMF voltage of a voice coil in a mass storage device, or the like, includes an amplifier connected across the coil to produce an output signal proportional to a voltage across the coil and a circuit connected to selectively connect the output signal of the a ...


3
Paolo Menegoli: Method of operating a vertical DMOS transistor with schottky diode body structure. STMicroelectronics, David V Carlson, Lisa K Jorgenson, August 31, 2004: US06784489 (41 worldwide citation)

A method of operating a vertical DMOS transistor associated with a Schottky diode, the method including diverting current from flowing through a body-to-drain pn junction diode to flowing through the Schottky diode when a metallic source contact becomes more positive than a drain of the DMOS transis ...


4
Paolo Menegoli, Carl K Sawtell: Low dropout voltage regulator using a depletion pass transistor. Acutechnology Semiconductor, January 24, 2006: US06989659 (38 worldwide citation)

A linear low dropout voltage regulator is described that makes use of a depletion mode NMOS pass transistor and of a PMOS transistor in series to the NMOS transistor and connected to its drain. The depletion NMOS transistor assures low dropout operations, while the series PMOS transistor allows the ...


5
Paolo Menegoli, Carl Sawtell: Class H drive. January 4, 2011: US07863841 (34 worldwide citation)

A method for driving a load by using an output stage amplifier in full bridge configuration whose supply is modulated by means of a fast switching power converter, controlled in order to maintain the stage's output common mode at its minimum voltage, is presented. The modulation of the switching pow ...


6
Carl K Sawtell, Paolo Menegoli: Cascode switch power supply. Carl Sawtell, March 18, 2008: US07345894 (32 worldwide citation)

A switching power supply is disclosed for improving the no-load power drain of low-power mains operated supplies. The power converter utilizes a cascoded switch arrangement with a conventional high voltage power MOSFET and a low voltage, low gate charge MOSFET. Driving only the small low voltage dev ...


7
Paolo Menegoli, Ender Tunc Eroglu, Whitney Hui Li: System and method for optimizing torque in a polyphase disk drive motor. STMicroelectronics, Lisa K Jorgenson, Andre Szuwalski, December 24, 2002: US06498446 (24 worldwide citation)

A method and device are disclosed for controlling a polyphase motor having a plurality of windings. The device includes a memory device having stored therein data representing a predetermined driving profile, and driver circuit for driving the windings of the polyphase motor based upon the data prov ...


8
Paolo Menegoli: DMOS transistors with schottky diode body structure. STMicroelectronics, David V Carlson, Theodore E Galanthay, Lisa K Jorgenson, July 20, 1999: US05925910 (23 worldwide citation)

A DMOS device in a complex integrated circuit having a well region defined by a buried isolation region and an overlapping deep drain region within an epitaxial layer formed over a substrate, a body region having two source regions within the well region, insulated gates over the two source regions, ...


9
Paolo Menegoli: Circuit for improving back emf detection in pulse width modulation mode. STMicroelectronics, Theodore E Galanthay, Lisa K Jorgenson, February 2, 1999: US05866998 (21 worldwide citation)

A power-switched driver circuit for a disc drive that provides accurate back emf detection in PWM mode. In one embodiment, a power transistor is coupled between the low side drivers and ground. During the off time of a PWM cycle, all of the high side drivers are off and the current recirculates thro ...


10
Paolo Menegoli, Ender Tunc Eroglu, Whitney Hui Li: Embedded programmable filter for disk drive velocity control. STMicroelectronics, Lisa K Jorgenson, Andre Szuwalski, September 2, 2003: US06614612 (21 worldwide citation)

A disk drive having a motor and a velocity control loop, which includes a frequency detector and a filter. The filter includes a filter section and an accumulator. The filter is programmable in that filter coefficient(s) are dynamically received by the filter section. One embodiment of the filter se ...