Bilateral electronic switch

摘要

A bilateral, low loss, wide band, switching circuit controls the transfer of a signal between two terminals. The balance points of a bilateral current gate connect to the terminals. A rectifier forward-biases the bilateral current gate when a controllable switching element forms a return path from the bilateral current gate to the rectifier. When the rectifier is energized, control circuitry closes the conductive path through the switching element to forward-bias diodes in the bilateral current gate so it operates as a modulator in which the signal to be switched is modulated onto the bias current from the rectifier.