A 2-GHz 1.6-mW phase-locked loop

This paper describes the design of a 2 GHz 1.6 mW phase-locked loop (PLL) fabricated in an 18 GHz 0.6 μm BiCMOS technology. Employing cross-coupled delay elements and inductive peaking, the circuit merges the oscillator and the mixer into one stage to lower the power dissipation. An experimental prototype exhibits an r.m.s. jitter of 2.8 ps, a tracking range of 100 MHz, and a capture range of 70 MHz while operating from a 3 V supply. The phase noise in the locked condition is -115 dBc/Hz at 400 kHz offset