** Please add LISO file w/ component values.
I designed the circuit for one of the 11 MHz photodiodes that we're going to install in the 40m Upgrade.
This is a simple representation of the schematic:
gnd
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# Cw2
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# n23
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# Lw2
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# n22
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# Rw2
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# 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
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# gnd gnd
#
#
#
I chose the values of the components in a realistic way, that is using part available from Coilcraft or Digikey.
Using LISO I simulated the Tranfer Function and the noise of the circuit.
I'm attaching the results.
I'll post the 55MHz rfpd later. |