fractional-N PLL

A 6 to 12-GHz Fractional- $N$ Frequency Synthesizer With a Digital Technique to Counter Modulus-Dependent Feedback Divider Delays

A 6 to 12-GHz Fractional- $N$ Frequency Synthesizer With a Digital Technique to Counter Modulus-Dependent Feedback Divider Delays 150 150

Abstract:

This article presents a frequency synthesizer for generating quadrature local-oscillator (LO) waveforms covering an octave range of 6 to 12-GHz. It uses two voltage-controlled oscillators (VCO) to cover an octave range from 12 to 24 GHz. The VCOs employ inductor mode switching in addition to conventional capacitor switching to obtain a wide tuning …

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