Francesco Carobolante: PWM control of motor driver. STMicroelectronics, Steve D Beyer, Theodore E Galanthay, Lisa K Jorgenson, February 9, 1999: US05869946 (66 worldwide citation)

Methods and apparatuses are provided for use in driving a multiple-phase brushless motor. The methods and apparatuses include generating a slewed phase control signal for each phase of the motor. The slewed phase control signals are substantially proportional to a speed control signal during non-tra ...

Paolo Menegoli, Chinh Nguyen: Apparatus and method for detecting motor position in PWM operation of a polyphase DC motor. SGS Thomson Microelectronics, Steve D Beyer, Theodore E Galanthay, Lisa K Jorgenson, June 16, 1998: US05767654 (17 worldwide citation)

A pulse width modulated (PWM) motor drive with back EMF monitoring of the floating phase of a polyphase motor is arranged so that zero crossings of the back EMF can be read without interference by PWM switching. A measure is taken of an interval between two zero crossings and, in the next interval, ...

Francesco Carobolante, Rafael S Lopez: Motor system with interrupted PWM oscillation. SGS Thomson Microelectronics, Steve D Beyer, Theodore E Galanthay, Lisa K Jorgenson, August 11, 1998: US05793183 (2 worldwide citation)

A brushless DC motor system using PWM switching, in which the PWM switching is temporarily frozen whenever a zero crossing is expected in the back EMF. This avoids disruption of zero-crossing detection due to switching transients from the power transistor.

Thomas H Campbell, William L Sweet, David A Rahdert: Thermography catheter. Steve D Beyer, Beyer Weaver & Thomas, June 27, 2002: US20020082515-A1 (1 worldwide citation)

Interventional tools are described that are suitable for measuring the temperature of or temperature variations in a vessel wall in the body of a patient and thereafter treating vulnerable plaque that is identified during the thermal mapping. The described interventional tools all include one or mor ...

Inderjit Singh, Hem P Takiar, Ranjan J Mathew, Nikhil V Kelkar: Method of packaging fuses. Steve D Beyer, Beyer Weaver & Thomas, August 23, 2001: US20010015477-A1

Improved methods of packaging external fuses together with integrated circuit devices are described. A pair of frame strips are provided that each have an associated set of contact pads. A resistor paste is applied to one of the contact pad sets and the frame strips are laminated together by curing ...

Stephen Alan Chessin: Unitary data structure systems, methods, and computer program products, for global conflict determination. Sun Microsystems, Atten Steve D Beyer, Beyer Weaver & Thomas, March 14, 2002: US20020032901-A1

A system, method and computer program product for compiling a source file and to generate a unitary data structure (UDS) containing information relating to symbols and associated global registers. The UDS permits assessment of symbol conflicts for global registers. The compiler also generates object ...

Alan Langford, Brian Barney, Caroline Stretton: Spray device. Steve D Beyer, Beyer Weaver & Thomas, April 18, 2002: US20020043262-A1

The present invention relates to a spray device (eg an inhaler) comprising an aerosol formulation administered to the respiratory or nasal tract in which the level of formulation remaining in the device can be readily inspected.