A digitally controlled oscillator constructed using adjustable resistors

Controlled oscillators have a significant impact on clock distribution in high-frequency microprocessors. This paper describes a novel digitally controlled oscillator (DCO) constructed using adjustable resistors. Its ping-pong architecture significantly reduces the jitter introduced when the control...

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Bibliographic Details
Published in2001 Southwest Symposium on Mixed-Signal Design (Cat. No.01EX475) pp. 80 - 82
Main Authors Saint-Laurent, M., Muyshondt, G.P.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
Subjects
Delay lines
Digital control
Frequency
Jitter
Multiplexing
Phase locked loops
Resistors
Ring oscillators
Switches
Voltage-controlled oscillators
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Summary:Controlled oscillators have a significant impact on clock distribution in high-frequency microprocessors. This paper describes a novel digitally controlled oscillator (DCO) constructed using adjustable resistors. Its ping-pong architecture significantly reduces the jitter introduced when the control input is updated. The adjustable resistors digitally set the delay of each stage of a current-starved ring oscillator. The oscillator operates from 1.350 GHz to 4.550 GHz in a 180 nm fabrication technology.
ISBN:0780367421
9780780367425
DOI:10.1109/SSMSD.2001.914942