The result of an AC Analysis is a set of amplitudes and phases that are plotted to create an Amplitude and Phase versus Frequency plot such as a Bode plot showing the frequency response of a circuit. The amplitude and phase of the AC Source is specified and a list of frequencies at which the circuit is to be analysed is given in an AC Analysis spice directive. More ways to use the SIN (or SINE) optionĬonfiguring the PULSE option to create a pulse signal source.Ĭonfiguring the EXP option to create a single pulse source with exponential rising and falling edges.Ĭonfiguring the SFFM option to create a simple, single frequency, frequency modulated sinusoidal signal source.Ĭonfiguring the PWL option to create an arbitrary piecewise linear waveform signal source.Īs well as their more obvious use to generate time domain signals for Transient Analysis (time domain) simulations, V and I Sources can also be configured as AC Sources for AC Analysis (frequency domain) simulations. To find out about these advanced options please search for V and I in the native LTspiceXVII Help files either in a locally installed copy or from the LTwiki site here:Įven more advanced options are described on the LTwiki site here:Ĭonfiguring the SINE option to create an unmodulated, single frequency sinusoidal signal source. ![]() LTspice offers several unique V and I Source features which are beyond the current scope of this document. Please note that the descriptions and examples of the different sources describes the most common configurations.
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