The diodes which produce the coring effect are biased by a signal which is related to {HEAD ~ the gain control signal} coupled to {TAIL ~ the device} 
The diodes which produce the coring effect are biased by a signal which is related to { HEAD ~ the gain control signal } coupled to { TAIL ~ the device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL