Abstract: Provided is a switched multiplexer configured to combine first, second, third and fourth signal paths each covering a sub-octave in a frequency range of from about 2 to about 18 GHz and to remove transmitter harmonics of an input signal to create a stable output impedance across the frequency range. The switched multiplexer comprises a transmit switch, a first diplexer and a power combiner. The first diplexer is connected in parallel with a second diplexer. The first diplexer comprises first and second signal paths. The second diplexer comprises third and fourth signal paths. Each one of the first, second and third signal paths include respective ones of the first switch, a second switch and a third switch, each interconnected to respective ones of a first signal path high-pass filter, second signal path low-pass filter and third signal path low-pass filter by respective ones of a first, second and third filter.

Abstract: A current source inverter operates in a full current regenerative mode without the use of a tachometer, rather a constant volts-per-hertz loop is used in a motor feedback loop to generate a torque signal determining the current reference in a DC link current control loop, and the DC link voltage is sensed to derive a signal in magnitude and sign to allow maximizing current control under torque limits established on the basis of such sensed DC link voltage.

Abstract: In a static DC/AC converter sequentially fired in relation to the frequency of the AC power supply, gating is provided by down counters which are instantly advanced, or delayed, in accordance with a change in the reference frequency, thereby to provide instantaneous firing angle adjustment.