07235939 is referenced by 3 patents and cites 41 patents.

A method for detecting the angular position of a rotor in a brushless electric motor, of the type in which the emission of a polarity signal of the back electromotive force by a detection circuitry associated with the motor, includes the using a bi-directional counter for counting the residence time difference of the logic states ‘0’ and ‘1’ at the output of the detection circuitry. The method is aimed at improving the detection of the instantaneous position of the rotor in a brushless motor through the detection of the zero-crossing signal.

Title
Method for detecting the angular position of a rotor in a brushless electric motor
Application Number
10/721766
Publication Number
7235939 (B2)
Application Date
November 25, 2003
Publication Date
June 26, 2007
Inventor
Marco Viti
Cornaredo
IT
Agent
Seed IP Law Group PLLC
Robert Iannucci
Lisa K Jorgenson
Assignee
STMicroelectronics S r l
IT
IPC
H02K 21/02
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