# Resonant RF diode front end
#
#		  gnd
#		  |
#		  Cw2
#		  |
#		  n23
#		  |
#		  Lw2
#		  |
# 		  n22
#		  |
#		  Rw2	             
#                 |                   |\             
#           n2- - - C2 - n3 -  - -  - |  \           
#            |    |      |   |        |4106>-- n5 - Rs -- no
# iinput    Rd   L1     L2 R24    n6- |  /     |           |
#      nin - |    |      |   |    |   |/       |         Rload     
#           Cd   n7     R22 gnd   |            |           |           
#            |    |      |        | - - - R8 - -          gnd               
#           gnd  R1     gnd      R7  
#           	  |               |
#		 gnd  	         gnd
#		      	
#
#

# Photodiode parameters for a 2mm EG&G InGaAs diode
c Cd 175p gnd nin   # diode capacitance
r Rd 3 nin n2      # diode resistance

# Fixed RF Inductor from Coilcraft
l L1  1.39u n2 n7     # tuned inductor for resonance - CoilCraft 143-20J12L
r R1  0.029  n7  gnd    # tuned inductor internal resistance

# 2-omega filter
l Lw2 633n n22 n23  # tuned inductor for resonance - CoilCraft 	143-10J12L
c Cw2 80p n23 gnd
r Rw2 0.018 n2 n22

c C2 0.1u n2 n3     # AC coupling
l L2 1.5u n3 gnd
r R22 0.005 L2 gnd
# r R24 0 L2 gnd

op max4106 max4106 n3 n6 n5
r R8     450 n5   n6
r R7      50 n6  gnd
r Rs      50 n5   no        # 50 Ohm series resistor
r Rload   50 no  gnd        # 50 Ohm load resistor

# photocurrent as a current source
iinput   nin  1e7 

# computing instructions 
freq log 1e6 1e8 1000

# this line for plotting the transfer function
#uoutput no:db:deg 

# this line for the noise
inputnoise no sum all

gnuterm x11

# this will make a .pdf file
gnuterm cps