Below are the
schematic and layout of a preamp designed and laid out by Jake Baker in 1999 for a power
line communications chip designed by ITRAN communications. The process used is
Tower Semiconductors 0.35 um process. The gain of the pre-amp was set to 23 dB.
The output clipping was accomplished using the source follower and the diode
connected load (in series with a current sink.) The layout shown below also
shows the op-amp used to drive an off-chip low impedance filter.
