This is a digitally-set motor speed controller circuit, using PWM to modulate power to the motor. Predict how the operation of this circuit will be affected as a result of the following faults. Consider each fault independently (i.e. one at a time, no multiple faults):



DAC output fails low (output = 0 volts DC):

DAC output fails high (output = V):

IGBT Q1 fails open (collector to emitter):

Solder bridge (short) between MSB input on U1 and ground: