## ISS Main Branch
##
## All circuit elements are named according to the circuit diagram 
## "D020241-D2.pdf" by R. Abbott.

# Stages are separated by empty lines and elements between stages are
# also separated by empty lines for easy file navigation
# Before the first stage there is a 'fully differentiable' op-amp
# that I believe serves to isolate the device from the power supply
# However, liso does not have the capability to analyze such an op-amp,
# as it has two outputs (+ and -)
#
# Node naming convention:
# When possible, nodes were named after terminals of op-amps. For an
# op-amp UXX: positive input - p_inUXX; negative input - n_inUXX; and 
# finally output - outUXX. If a node was not directly connected to some
# terminal of an op-amp, it was named after the two circuit elements 
# connecting to it (no more than two elements were ever connected to
# such a node)

# Stage 1
op U5 ad829 p_inU5 n_inU5 outU5
r R20 1k p_inU5 outU5
c C14 4.7p p_inU5 outU5
c C39 4.7p p_inU5 gnd
r R34 1k p_inU5 gnd
c C13 120p outU5 gnd
c C12 120p outU5 gnd

r R18 499 outU5 servo

# Stage 2
op U4 ad829 p_inU4 servo outU4
c C28 10u p_inU4 gnd
r R24 499 p_inU4 gnd
c C18 15p servo outU4
r R31 499 servo outU4

c C25 1u outU4 p_inU3
r R23 2k p_inU3 gnd

# Stage 3
op U3 ad829 p_inU3 n_inU3 outU3
r R16 402 n_inU3 gnd
r R30 4.02k n_inU3 outU3
c C17 4.7p n_inU3 outU3

r R22 19.1k outU3 n_inU2
r R3 523 outU3 r3c2
c C2 1u r3c2 n_inU2

# Stage 5
op U2 ad829 p_inU2 n_inU2 outU2
c C38 10u p_inU2 gnd
r R37 17.4k p_inU2 gnd
r R15 158k n_inU2 outU2
c C8 3.3p n_inU2 outU2
r R29 4.99k n_inU2 r29c34
c C34 1n r29c34 outU2

r R21 1.54k outU2 n_inU7

# Stage 6
op U7 ad829 p_inU7 n_inU7 outU7
c C37 10u p_inU7 gnd
r R36 1.5k p_inU7 gnd
r R14 14.7k n_inU7 outU7
r R28 1.58k n_inU7 r28c32
c C32 100n r28c32 outU7

r R55 1.5k outU7 n_inU13
r R65 475 outU7 r65c69
c C69 100p r65c69 n_inU13

# Stage 7
op U13 ad829 p_inU13 n_inU13 outU13
c C44 10u p_inU13 gnd
r R41 316 p_inU13 gnd
r R58 499 n_inU13 outU13
c C67 4.7p n_inU13 outU13

uinput p_inU5 n_inU5 10

freq log 1 .1M 400
uoutput outU13:abs:deg

gnuterm x11