Title :
Amplitude detection inside CMOS LC oscillators
Author_Institution :
Dept. of Electr. Eng., Columbia Univ.
Abstract :
In this paper we demonstrate that an intrinsic amplitude detector exists in negative resistance CMOS LC oscillators. The DC bias on the common-mode node in CMOS VCOs depends on the oscillation amplitude. Amplitude control loops can thus be built without a separate amplitude detector. Insights in possible AM to PM noise mechanisms are also derived
Keywords :
CMOS integrated circuits; network analysis; oscillations; peak detectors; phase noise; voltage-controlled oscillators; AM noise mechanisms; CMOS LC oscillators; CMOS VCO; PM noise mechanisms; amplitude control loops; intrinsic amplitude detector; oscillation amplitude; Automatic control; Detectors; Electric resistance; Low pass filters; Parasitic capacitance; Phase locked loops; Radio frequency; Tail; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693791
