Total Harmonic Distortion tests and results

Test setup for THD measurements. I will use my Total Harmonic Analyzer for LTSPICE to perform these tests. Control script is slightly modified, to decrease test (simulation) time. It is possible to do so, because all schematics are settling fast and we are not looking into very small THD numbers. Signal amplitudes are also of […]

AC performance, part 2. Input capacitance modulation. Load influence.

Modulation of Input Capacitance. Changing offset causes some changes in the frequency response. While AC analysis is small signal analysis, offset change will show some differences in big signal performance. One part of this change is modulation of Ccb capacitance.

AC performance of 4 output stages.

AC small signal gain, 8 Ohm load. Overall gain for all 4 stages was evaluated on the following plots. We will try to use similar colors for all comparison testing.

Undocumented LTSPICE features-solving some of convergence problems using backward Euler integration method.

LTSPICE is surprisingly flexible simulator but some of important options are not described in documentation. One of them is additional method of integration that you can use to address convergence problems. This method is called backward Euler.