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

Soumyajit Mandal; Piotr Maj; Grzegorz W. Deptuch

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arXiv · 2411.01552

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

Soumyajit Mandal·Piotr Maj·Grzegorz W. Deptuch

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Abstract

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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Soumyajit Mandal, Piotr Maj, Grzegorz W. Deptuch. 2024-11-03. An Integer-N Frequency Synthesizer for Flexible On-Chip Clock Generation. https://arxiv.org/abs/2411.01552

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