A Wide Range Digitally Controlled Oscillator with Direct Proportional Loop Control

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Abstract

This paper describes a 9-bit digitally controlled oscillator (DCO) that enables the direct proportional loop control by an all-digital negative feedback loop circuit while satisfying a wide frequency range of 3.94 - 8 GHz. The supply voltage of the 4 stage delay cell is adjusted with two digitally controlled resistors (DCR), and the instantaneous frequency change for proportional path application is shown through simulation. The basic operation of DCO has verified with post layout simulation. This circuit is designed with 65nm CMOS technology. The power consumption is 25.1mW with a supply voltage of 1.2V at 8 GHz clock frequency. According to the simulation, the peak-to-peak jitter of the clock is 1.68ps and a phase noise is -82.8dBc/Hz at 1MHz offset frequency.

Original languageEnglish
Title of host publicationProceedings - International SoC Design Conference 2022, ISOCC 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages137-138
Number of pages2
ISBN (Electronic)9781665459716
DOIs
StatePublished - 2022
Event19th International System-on-Chip Design Conference, ISOCC 2022 - Gangneung-si, Korea, Republic of
Duration: 19 Oct 202222 Oct 2022

Publication series

NameProceedings - International SoC Design Conference 2022, ISOCC 2022

Conference

Conference19th International System-on-Chip Design Conference, ISOCC 2022
Country/TerritoryKorea, Republic of
CityGangneung-si
Period19/10/2222/10/22

Keywords

  • digitally controlled osciliator(DCO)
  • digitally controlled resistor(DCR)
  • loop delay
  • proportional path

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