Excellent performance feature of current
mode blocks, have become main reason to use current
mode signal processing instead of voltage mode. Today’s,
it is well known that high speed and accuracy, low level
supply, small size and wide band dynamic range could be
achieved by taking advantages of the current mode blocks
[1-6]. The current-mode output stage (COS) can be used
as the end part of COA, moreover, it could be considered
as voltage to current convertor (VIC) which is very significant
analog block especially in high frequency applications
[7-10]. Many important properties of COA like
offset and CMRR is determined by COS which shows
great value of this block [7,10-13].