Find a SPICE Mixer Model for LTSpice Simulation

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A user is seeking a SPICE model for a mixer suitable for LTSpice, specifically one that includes all three inputs: LO, RF, and IF. They express a desire for a model that is more advanced than basic voltage multiplication, as they are focused on learning about feedback systems involving RF elements. Another user shares a double-balanced mixer schematic in LTSpice, but the attachment is not accessible to some participants. Requests for the attachment to be reposted or sent via email are made by other users. The discussion highlights the need for accessible resources for LTSpice simulation in RF applications.
f95toli
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Does anyone know of a reasonably good SPICE model of a mixer? Something that I can use in LTSpice?

It doesn't have to be accurate (meaning it doesn't need to be based on intermodulation tables) since all I am doing is trying to learn about feedback systems that contain RF elements. However, I would like it to have all 3 inputs (LO,RF and IF).

I know you can multiply two voltages in SPICE etc to emulate mixing, but that is a bit too basic for what I am doing.
 
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https://www.physicsforums.com/attachments/22095Here is a double-balanced mixer in LTSPICE. It is shown with RF and LO of 500 and 600 Hz inputs, and a 100 Hz IF output.
Bob S
 

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Thanks, that is just what I needed.
The attachment is not working for some reason, but I should be able to reproduce the circuit from the image alone.
 
Bob S said:
https://www.physicsforums.com/attachments/22095Here is a double-balanced mixer in LTSPICE. It is shown with RF and LO of 500 and 600 Hz inputs, and a 100 Hz IF output.
Bob S

Hai friend,
I couldn't download your attachment, can u able to repost it..
or could you please send it to my ID "kalidasascreator@gmail.com"

Thanks in Advance
 
f95toli said:
Thanks, that is just what I needed.
The attachment is not working for some reason, but I should be able to reproduce the circuit from the image alone.

sir please send this attachment.needed for project.thanks in advance
 
Here is copy of 4-diode double balanced mixer schematic (attached):* C:\Program Files\LTC\LTspiceIV\mixer-double-balanced.asc
L1 N001 0 10m
L2 0 N007 10m
L3 N004 0 10m
L4 Vout N008 10m
L5 N002 Vout 10m
L6 N005 0 10m
D1 N001 N002 BAT54
D2 N007 N008 BAT54
D3 N002 N007 BAT54
D4 N008 N001 BAT54
V1 N003 0 SINE(0 0.5 500 0 0 0 600)
V2 N006 0 SINE(0 .5 600 0 0 0 600)
R1 N006 N005 51
R2 N004 N003 51
.model D D
.lib C:\Program Files\LTC\LTspiceIV\lib\cmp\standard.dio
K1 L1 L2 L3 1
K2 L4 L5 L6 1
.tran 0 0.05 0 0.0001
* Mixer-double-balanced
* 500 Hz x 510 Hz --> 10 Hz
* Bob S\n11/14/09
.backanno
.end
 

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