Injection-lock bandwidth extension by control modulation and current ´hump´ slope detection

A scheme is described for using the injection-locking bandwidth of an electronically tuned microwave solid-state source to extend the locking to the limits of its electronic tuning range. The power supply current ´hump´ phenomenon is used to slope-detect a control modulation, which is then used to eliminate the difference in frequency between the free-running oscillator and the injected signal.