05057753 is referenced by 42 patents and cites 5 patents.

Apparatus for controlling phase commutation of a brushless DC motor. The apparatus is comprised of a back EMF detection technique to determine the current position of the rotor, an error rejection circuit to prohibit commutation noise from causing errors in determining the present rotor position, a means for determining the next phase set to energize and proper energization timing to maintain a lead angle between the physical rotor position and the magnetic wave, and a means for driving the appropriate brushless DC motor phases with current.

Title
Phase commutation circuit for brushless DC motors using a spike insensitive back EMF detection method
Application Number
7/546512
Publication Number
5057753
Application Date
June 29, 1990
Publication Date
October 15, 1991
Inventor
Felix De Herrera
Santa Cruz
CA, US
Hans M Leuthold
Santa Cruz
CA, US
Agent
Flehr Hohbach Test Albritton & Herbert
Assignee
Seagate Technology
CA, US
IPC
H02P 6/02
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