Thank you.
The model is a good approach for the original device.
As I mentioned before, I used a V-source as the ECM and connected the output with the negative cable. I also think that silver wire and copper wire are equal.
Now I simulated it(AC) and my frequency at the antenna is a good deal bigger than 900MHz. Probably I made a mistake calculating the inductances of the coil. I will repeat it now.
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--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
Hello Christian,
When I assume C1=18pF and C30=2pF, a reasonable diode model
could be as shown below.
.model BB105 D(Is=.1p Rs=1 Bv=35 Ibv=10u Cjo=35p Vj=.75 M=.8)
Use Cjo and M to adjust the capacitance.
The ECM is a V-source with 1kOhm or 2kOhm output resistance.
I think using silver wire or copper wire doesn't matter.
You can try to calculate the resistance taking skin effect into
account.
Be aware that all the components have inductance of 0.5nH to 1nH
per mm of wire length.
Best regards,
Helmut
--- In LTspice@..., "christianvierck" <christianvierck@> wrote:
Hey guys,
I need some help to simulate my circuit correctly.
I want to simulate a UHF-transmitter and I have problems with three devices in my curcuit.
Here you can see the circuit diagram:
Now the three devices which exasperate me.
1. BB105: I did not find any model for this device. I'm not sure if it's manufacturing stoped. Can someone help me with this? A alternative model or sth.
2. ECM: Like other microphones I used a voltage source in my simulation. Now I'm not sure how to connect it with my curcuit?
3. Silver wire: Can I leave it for a simulation because of the same conductance as a copper wire?
Have a nice day,
CV
