Motor Question

Hello forum ,
i have a motor , i would like to ask you please , they wrote in the datasheet:
Output Signal, Common Mode: 155microA with an AGC current of 30mA.
Could please explain for me the term AGC (automatic Generation Control), is this mean i should use an special electronic component? and what kind ?
Have a nice day,
Thanks in advance

You would be better posting a picture of the motor along with any model type number