Patent ID: 6914855
Filing Date: 2005-07-05
Classification: G04C,H02P

Abstract:
1. A circuit for selectively driving n motor coils, wherein n is an integer greater than 0, wherein each of n motor coils includes a first terminal and a second terminal and a second terminal, wherein all of the second terminals are coupled to a common line, the circuit comprising: n+1 outputs, wherein n of the outputs are individually coupled to a respective first terminal of the n motor coils, and the (n+1) 2inputs, n of which are each associated with a respective first input control line for a respective motor coil, and n of which are each associated with a respective second input control line for the respective motor coil; (n+1) motor coil drivers, each of which include an input and an output, wherein the output of n motor coil drivers are individually coupled to a respective first terminal of the n motor coils, the (n+1) a logic circuit having as inputs control signals from the n second input control lines and an output to which is coupled the input of the (n+1) wherein both a positive and a negative magnetic field can be generated within each of the n motor coils in response to control signals on each of its associated first and second input control lines.