Title :
A digitally controlled oscillator constructed using adjustable resistors
Author :
Saint-Laurent, Martin ; Muyshondt, Gabriel Patrick
Author_Institution :
Intel Corp., Austin, TX, USA
Abstract :
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
Keywords :
VLSI; delay lines; digital control; high-speed integrated circuits; microprocessor chips; timing circuits; variable-frequency oscillators; 1.350 to 4.55 GHz; 180 nm; HF microprocessors; adjustable resistors; clock distribution; delay setting; digitally controlled oscillator; high-frequency microprocessors; jitter reduction; ping-pong architecture; ring oscillator; Delay lines; Digital control; Frequency; Jitter; Multiplexing; Phase locked loops; Resistors; Ring oscillators; Switches; Voltage-controlled oscillators;
Conference_Titel :
Mixed-Signal Design, 2001. SSMSD. 2001 Southwest Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-6742-1
DOI :
10.1109/SSMSD.2001.914942
