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How do I simulate the above circuit in LTSPICE? The way I have it set up right now gives me a singular matrix error which I don't understand. Vi is a AC signal with a frequency of 100kHz and a small amplitude of less than 10mV.

Circuit image

SPICE ciruit

Error

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    \$\begingroup\$ Consider showing the error and code so people can maybe see what the issue is. What they won't do is build the model for you from the question you copied... \$\endgroup\$ – Solar Mike Mar 8 '18 at 8:18
  • \$\begingroup\$ You're right. I'll revise it. \$\endgroup\$ – Josue Rodriguez Mar 8 '18 at 8:19
  • \$\begingroup\$ gommer's answer is the one you're looking for, but also consider you may need a DC path for the output reading. For example, a 1g resistor in parallel with the 10n capacitor. \$\endgroup\$ – a concerned citizen Mar 9 '18 at 7:06
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Obviously, B1 has no return path. That arrow on top is ground but it's a different node than the ground you use on the bottom of the schematic.

Change the arrow type ground on top (COM) to the closed triangle type ground (node 0) and you'll be OK.

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