Szczepkowski, Grzegorz and Farrell, Ronan
Analysis and design of oscillators based on
low-voltage self-oscillating active inductors.
In: ISSC 2010, June 23–24 2010, UCC, Cork, Ireland.
This paper presents a new consistent analysis of self-oscillating active in-
ductors together with a complete design example of a 90 nm CMOS current controlled
oscillator (CCO) for ISMapplications. Using the proposed passive compensation method
in place of a standard negative impedance converter, typical performance of active induc-
tor oscillator is achieved with reduced static power consumption. The article presents
a small signal, large signal and phase noise analysis of the proposed oscillator together
with related design trade-offs. Theoretical results are confirmed by a simulation of cur-
rent controlled oscillator designed using UMC 90 nm 1P9M RF process libraries. The
proposed circuit achieves a relative tuning range of 26% with a 434 MHz carrier fre-
quency and average in band phase noise of -92 dBc/Hz at 1 MHz offset. The maximum
power consumption of the oscillator core is only 2 mW from a 1 V supply.
Conference or Workshop Item
||Active inductors; negative resistance oscillator; current controlled oscillator; CMOS; RF circuits; LTI phase noise model;
||Science & Engineering > Electronic Engineering
Dr. Ronan Farrell
||09 May 2012 11:30
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