Inverting tristate step-up converter

The here-treated step-up converter with two interference possibilities has several interesting features. First the output voltage is inverse to the input voltage, second the voltage transformation ratio is linearized, third the dynamic behavior is that of a phase-minimum system, and fourth the stress of the electronic switches is reduced. The function of the converter is explained, the steady state presented, the large and small signal models are derived, and the Bode plots concerning the output voltage around the operating point are given. The start-up is investigated. LTSpice is used to check the considerations.