1
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 ...


2
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, ...


3
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.


4
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 ...


5
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 ...


6
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 ...


7
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.