... output silicon controlled in a body, the effective realization the control circuit and high voltage circuit isolation ... :1, (1) (2) for the output, namely the module of the two polar internal silicon controlled, enhanced and ... adjustable area, that is, with the increase of the control voltage, the voltage ac load from 0 volts ... , but (1) (2) and (3) (4) must be the same phase, or get out of control. (3) ( ...