Current from this current source is applied to load resistor 176 coupled between {HEAD ~ the collector} of transistor 168 and {TAIL ~ ground} 
Current from this current source is applied to load resistor 176 coupled between { HEAD ~ the collector } of transistor 168 and { TAIL ~ ground }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL