Combining PWM switch models with linear circuit-analysis software and math software creates a fully computer-based approach to obtaining and analyzing the transfer functions of dc-dc converters ...

Up to this point, we’ve shown how LTspice can implement a transfer function by using circuit elements and the Laplace transform. Examples shown have been in the frequency domain.

A 22-kΩ feedback resistor, R3 , provides Amplifier D with a gain of two, which sets a unity-gain-transfer function in the circuit's passband. The circuit's single-ended output with respect to ground ...