* Gmin | settable const | minimum conductance = 1e-12 (or set via Ctrl Panel or. * kelvin | -2.73150 e+02 | absolute zero in degrees C * echarge | 1.6021765e-19 | charge of an electron * boltz | 1.38062 e-23 | Boltzmann constant The following keywords (global variables and constants):.b true if preceding expression is greater than succeeding expression, otherwise false * The transfer function of the Freq circuit element is specified by an ordered list of points of freq(Hz), mag(dB) and phase(deg) as follows: where f1= b true if preceding expression is greater than or equal to succeeding expression, otherwise false For Laplace expressions, ^ signifies exponentiation. The value of nfft times this resolution is the highest frequency considered. The reciprocal of the value of the window is the frequency resolution. It is recommended that the LTspice first be allowed to make a guess at this and then check the accuracy by reducing reltol and/or mtol (*default=1) or explicitly setting nfft and the window. The response must drop at high frequencies or an error is reported. LTspice must guess an appropriate frequency range and resolution. The time domain behavior is found from the impulse response obtained from the Fourier transform of the frequency domain response. The frequency response at frequency f is found by substituting s with sqrt(-1)*2*pi*f. The Laplace transform must be a function solely of s. The Laplace transform is applied to the result of the behavioral current or voltage signal. See B sources (common_examples) for a case where this does not appear to apply. If the voltage across a source changes by more than tripdv volts in tripdt seconds, that simulation time step is rejected. Tripdv and tripdt control step rejection. For the current source, parallel resistance and capacitance may be specified with the Rpar and Cpar instance parameters. The first syntax specifies a behavioral voltage source and the next is a behavioral current source. Syntax (* denotes undocumented features): Symbol names: BV, BI, *BR (arbitrary resistor), *BP (arbitrary power sink or source) Arbitrary behavioral voltage or current sources. For examples of b-source usage see B sources (common examples).ī. This reference is consistent with the Help file topic, but with friendlier presentation and more complete information.
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