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Troubleshooting PSPICE Errors: Tips for Simulating Your Graph Successfully
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Looks like no connection between signal Vf and the top wire of C1.
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Welcome to PF.
I question the directive line; .AC DEC 1000 100Hz 10MHz
Units should not be included in values.
In standard spice, milli is; m = M = 1e-3, while MEG = 1e6.
Try; .AC DEC 1000 100 10MEG
The second error is probably due to the use of "x" for multiply rather than "*".
Rather than "10x10^-9s" You may need to use something more like "10e-9*s"
I question the directive line; .AC DEC 1000 100Hz 10MHz
Units should not be included in values.
In standard spice, milli is; m = M = 1e-3, while MEG = 1e6.
Try; .AC DEC 1000 100 10MEG
The second error is probably due to the use of "x" for multiply rather than "*".
Rather than "10x10^-9s" You may need to use something more like "10e-9*s"