gm-Boosted VCO with low power consumption and large tuning range

A voltage controlled oscillator (VCO) in a rather new topology is presented. The architecture is based on the classical Colpitts oscillator in common-gate configuration. In order to achieve a higher effective transconductance the gate is not biased with a DC voltage. Instead the biasing voltage has...

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Bibliographic Details
Main Authors: Ussmuller, Thomas, Seemann, Kay, Weigel, Robert
Format: Conference Proceeding
Language:English
Subjects:
Circuit topology
CMOS analog integrated circuits
Energy consumption
Microwave FET oscillators
Microwave integrated circuits
Microwave oscillators
Monolithic integrated circuits
Phase noise
Ring oscillators
Transconductance
Tuning
Voltage
Voltage controlled oscillators
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Description
Summary:A voltage controlled oscillator (VCO) in a rather new topology is presented. The architecture is based on the classical Colpitts oscillator in common-gate configuration. In order to achieve a higher effective transconductance the gate is not biased with a DC voltage. Instead the biasing voltage has a phase shift of 180deg to the signal at the LC-tank. The design goals have been a wide tuning range and a low power consumption with at the same time the least possible phase noise.
DOI:10.1109/EUMC.2007.4405376