A connection circuit using only 5V power supply

It is converted into a pulse width modulation (PWM) signal by the error processing link and output from pin 3 (MC
  signal). At the same time, the differential of the position error is also calculated, which represents the movement speed of D and
  is selected from pins 6 and 7 for system damping. One of them is proportional to positive speed and the other
  is proportional to negative speed. Both signals are converted into analog damping signals in an external op amp
  . Another operational amplifier can be used to synthesize the position error and damping signal into an
  analog signal, which is used to control the subsequent power amplifier and drive the DC motor. (See Figure
  13-17). The gain and damping of the system can be adjusted by the two resistors RD and R. to
  optimize the performance of the system.