ABSTRACT: A power adaptive PLL for B-ISDN multi-rate  transmitter implementation in 0.5μm BiCMOS is described. The PLL power consumption matches the data rate by using a novel type ECL library. 210mW @ 155MHz to 320mW @ 1.2GHz total power is achieved. 17ps jitter at 1.2GHz is measured. Fast time to Silicon was performed by a Full Top-down design methodology.
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