# 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