Would anybody have a simple PI spice asc file that they could share please

[6666]

Would anybody have a simple spice asc file for a single coil Nfet PI that they could share please ?

I just need the typical circuit, 555, Nfet, mono coil, preamp, sample switch , first integrator.

I am not good at Spice design, but I try.
Thanks

[waltr]

Here is one I have used and works.

I would NOT put a 555 in LTSpice, it takes a very long time to simulate. Much easier and faster to use a Pulsed Voltage source.
Coil_pulsing.zip

I'll do a 555 in LTSpice and post this later so you can try it.

[waltr]

Here is a 555 LTspice simulation.
555.zip

The schematic values are from the HH project:
https://www.geotech1.com/cgi-bin/pages/common/index.pl?page=metdet&file=projects/hammerhead/index.dat

[6666]

Thanks Waltr that's very much appreciated.

[6666]

Hi Waltr, I dont have a AD795 in my library, can you please tell me the connections to the + and - inputs thanks

[6666]

I am assuming that the opamp + input goes to ground via C1, R12 ?

[waltr]

Hi Waltr, I dont have a AD795 in my library, can you please tell me the connections to the + and - inputs thanks

I am assuming that the opamp + input goes to ground via C1, R12 ?

Yes, that is an inverting integrating op-amp. The AD795 is part of the standard LTsipce library so if you have allowed LTSpice to update it should be there.
However, any JFET input op-amp in the LTSpice library such as an AD820 works for simulation.
R10 goes to inverting input and C1, R12 to non-inverting input.

[6666]

I installed the latest Ltspice 64 bit, Win 10 version on my spare pc, and I now have all the parts, thanks.
new program works much better.

[waltr]

I installed the latest Ltspice 64 bit, Win 10 version on my spare pc, and I now have all the parts, thanks.
new program works much better.

Good. The other thing with the newer LTSpice is it now has all the Analog Devices parts. This happened after Analog Devices bought out Linear Tech.