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An Integer-N Frequency Synthesizer for Flexible On-Chip Clock Generation

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arxiv 2411.01552 v2 pith:LNUP2YIR submitted 2024-11-03 eess.SP hep-ex

An Integer-N Frequency Synthesizer for Flexible On-Chip Clock Generation

classification eess.SP hep-ex
keywords synthesizerclockflexiblefrequencygenerationinteger-non-chipoutput
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A low-power integer-N frequency synthesizer for flexible on-chip clock generation has been designed in 65 nm CMOS technology. The circuit can be programmed to generate two independent low-jitter clocks between 30 MHz and 3 GHz that are locked a 10-50 MHz reference input. The design uses a phase-locked loop (PLL) with a dual-tuned LC voltage-controlled oscillator (VCO), programmable feedback divider, and dual output dividers. The total power consumption from 1.2 V and 0.8 V supplies is 4.0 mW. Experimental results confirm the functionality of the proposed synthesizer over a wide range of output frequencies.

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