An error amplifier is disclosed for use in linear or switched-mode voltage or current regulators that use a transconductance type power-amplifier, enabling easy modular parallel connection of said regulators by simply parallel wiring of normally externally accessible nodes of the individual regulators:...http://www.google.de/patents/US4920309?utm_source=gb-gplus-sharePatent US4920309 - Error amplifier for use with parallel operated autonomous current or voltage regulators using transconductance type power amplifiers
