--- In LTspice@..., Hubert Hagadorn wrote:
I believe it is impossible to have a physically realizable
resistor that is frequency dependent and has no reactive
component.
In Laplace expressions LTspice will accept such a construct.
The key is to use the abs() function to convert the expression
to purely real. If desired this can be converted to purely
imaginary by multiplying by the sqrt(-1). For example:
V1 1 0 ac=1 ; .ac analyses always require an ac source
B1 2 0 V= V(1) Laplace 1/(1+sqrt(s/6.3)) ; half pole at 1Hz
B2 3 0 V= V(1) Laplace 1/(1+abs(sqrt(s/6.3))) ; real only version
B3 4 0 V= V(1) Laplace sqrt(-1)/(1+abs(sqrt(s/6.3))) ; imaginary
