A 400MHz-2.4GHz Radiation-Tolerant Self-Biased Phase-Locked Loop

This paper describes the design of a self-biased Phase-Locked Loop for radiation-tolerant applications. A novel single-to-differential converter circuit that eliminates the mismatches on the output of a phase-frequency-detector is proposed to minimize reference spurs. Design considerations for radiation-tolerant design are also described. Fabricated in a 0.25 μm CMOS Silicon-on-Sapphire process, the PLL achieves an operating frequency range from 400MHz to 2.4GHz. The RMS jitter of the PLL is 3.9ps at 2.4 GHz.