In applications where inverters transfer power from a DC power source to an AC power source, it is possible to use AC-to-DC controlled rectifier circuits operating in the inversion mode.
12.
Use of multiplier ICs means that the modulation products are largely confined to sum and difference frequency of inputs ( unless the circuit is overdriven ), rather than the much more complicated products of the rectifier circuit.
13.
Multiple-anode valves were usually used for multi-phase rectifier circuits ( with 2, 3, 6 or 12 anodes per tank ) but in HVDC applications multiple anodes were often simply connected in parallel in order to increase the current rating.
