Title :
A 220 MHz low phase noise Colpitts oscillator
Author :
Ning Lu ; Haney, Mike
Author_Institution :
Motorola Solutions Inc., Schaumburg, IL, USA
Abstract :
This paper presents the design of a VCO using Colpitts topology. The VCO is designed to work at 220 MHz as part of the Frequency Generating Unit (FGU). The circuit has been realized by discrete level circuits. The frequency range is between 217 MHz and 222 MHz. The low phase noise of -122 dBc/Hz at 20 kHz offset frequency was achieved by the varactor tuned Colpitts oscillator. Both simulation and measurements demonstrate the low noise performance.
Keywords :
VHF oscillators; phase noise; varactors; voltage-controlled oscillators; Colpitts oscillator; Colpitts topology; VCO; discrete level circuits; frequency 217 MHz to 222 MHz; frequency generating unit; low phase noise; varactor tuned; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-61284-856-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2011.6026402
