Below is the
layout of a cell, a 32 kHz cyrstal
oscillator (2^15
Hz) powered by a one-Farad super cap, designed and laid out by Jake Baker
in 1998. During
low-power operation the cell draws less that 2 uA
over a power supply range of 2.7 to 4.3 V allowing it to operate for
more than
200 hours. Off-chip components include a 10 MEG resistor and the
crystal (and
the cap). During normal operation the cell can be put into a high-power
mode of
operation to increase the cells immunity to power supply and ground
noise. The
cell was designed and laid out in 1998 by Jake Baker using Tower's 0.6
um CMOS
process.
