AN1046/D: 2-Chip Solution for Brushless Motor Controller Design Using MC33035

AN1046/D 2-Chip Solution for Brushless Motor Controller Design Using the MC33035's circuitry contains all but one of the major elements for closed loop speed control. The only piece lacking is one that monitors motor RPM and generates a signal proportional to motor speed, a function which traditionally has been the domain of a tachometer