Title :
A 0.5V 10GHz 8-phase LC-VCO Combining current-reuse and back-gate-coupling techniques consuming 2mW
Author :
Amin, Md Tawfiq ; Pui-In Mak ; Martins, Rui P.
Author_Institution :
State-Key Lab. of Analog & Mixed-Signal VLSI, Univ. of Macau, Macao, China
Abstract :
This paper describes an ultra-low-voltage low-power 8-phase voltage-controlled oscillator (VCO) for 10GHz beam-forming satellite receivers. It is composed by four 0.5V current-reuse LC-VCO cells inter-locked by direct-back-gate coupling, featuring independent sizing of coupling strength and frequency tuning, while avoiding the risk of forward bias the substrate p-n junctions. Optimized in 65nm CMOS, the 8-phase VCO draws only 2mW. The phase noise at 1MHz offset is -114dBc/Hz to -110dBc/Hz over a 32.5% tuning range from 8.55 to 11.88GHz. These results correspond to a high-and-stable FOM within -188 to -189.5dBc/Hz.
Keywords :
CMOS integrated circuits; low-power electronics; oscillators; p-n junctions; 8-phase LC-VCO; back-gate-coupling techniques; beam-forming satellite receivers; current-reuse techniques; forward bias; frequency 10 GHz; inter-locked; p-n junctions; power 2 mW; size 65 nm; voltage 0.5 V; CMOS integrated circuits; Couplings; Phase noise; Switching circuits; Transistors; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572435
