All of the first output terminals of the switches are coupled together to the first current mirror, {HEAD ~ all} of {TAIL ~ the second output terminals} are coupled together to the second current mirror, and the digital control signal is coupled to the plurality of switches to control their positions 
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All of the first output terminals of the switches are coupled together to the first current mirror , { HEAD ~ all } of { TAIL ~ the second output terminals } are coupled together to the second current mirror , and the digital control signal is coupled to the plurality of switches to control their positions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH