Category Archives: LTspice for EE students

Commands covered: .ac .meas  What is impedance? Impedance is simply defined as voltage divided by current (Z = V/I). This definition of impedance applies to both in the time domain or the frequency domain. In the frequency domain it’s really … Continue reading →

LTspice provide a built in exponential waveform generator. This can be very helpful to generate arbitrary exponential pulses to simulate special systems such as surge protector or ESD modeling. In this lesson, we will understand all the parameters that are … Continue reading →

by Kashif Javaid Piece-wise linear voltage or current source is very interesting and can be used to create arbitrary waveforms. Basically you define points (tx, vx) to draw out the precise waveform. For times before t1, the voltage is v1. For … Continue reading →

Kashif Javaid In this lesson we will focus on a single element Lossless Transmission line (T-line) as shown in Figure 1. Lossless T line simulation will be introduced here. One of the goal of these lessons are to give out … Continue reading →

LTspice command: .op Node voltage and Mesh current are methods that systematically calculate voltages and currents in a circuit. Although LTspice calculate voltages and currents by using sophisticated network theory, but nonetheless, it can be useful to match the node … Continue reading →

Kashif Javaid “Never perform a measurement or simulation without first anticipating the results you expect to see.” ~Eric Bogatin’s Rule # 9 Learn these spice commands: .dc .param In these 10 lesson series, we will explore LTspice circuit simulator. Assumption is … Continue reading →