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