RFICInDaHouse
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Posts: 7
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yeah, all injection-locked frequency dividers, injection-locked oscillators have the same operation and was derived by Miller in the 1940s! (He actually proposed the regenerative frequency divider). In principle, an oscillator running at f0, can be injection locked to an external stimulus at f0 +/- df, where df is the locking bandwidth. The locking bandwidth has its origion in satisfying Barkausen's criterion. As you move away from the resonant frequency, the load impedanance goes down and so does the loop gain. That's why the higher the tank Q, the faster the tank impedance will drop, and the smaller the locking bandwidth..... I don't like the math of it, after all we are engineers! and we seek intuition.
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