Step width regulated dc/dc converter

TLDR: In this paper, a feedback regulated DC/DC converter is disclosed, where an unregulated master oscillator feeds square waves into one core of a dual-core transformer, and a slave oscillator (whose output amplitude is a predetermined fraction of the master oscillators output amplitude) also feeds squares waves into the other core of the transformer.

Abstract: A feedback regulated DC/DC converter is disclosed. More particularly, an unregulated master oscillator feeds square waves into one core of a dual-core transformer, and a slave oscillator (whose output amplitude is a predetermined fraction of the master oscillator''s output amplitude) also feeds square waves into the other core of the transformer. A sample of the transformer output after it has been rectified and filtered is compared against a reference value and the difference between the output value and the reference value produces an error current which is fed into a delay circuit. The delay circuit will then synchronously adjust the output phase of the slave oscillator. Thus, the average voltage appearing across the secondary of the dual-core transformer is varied by adjusting the relative phase between the master and the slave oscillator. Since the slave oscillator operates at only a small percent of the master oscillator''s output, step-width modulation, rather than the standard pulse width modulation, results.