Implementation of an RF CMOS quadrature LC voltage-controlled oscillator based on the switched tail transistor topology

Thanachayanont, Apinunt; Krairiksh, Monai

doi:10.1142/S0218126610006530

Implementation of an RF CMOS quadrature LC voltage-controlled oscillator based on the switched tail transistor topology

Author(s)

Thanachayanont, Apinunt

Krairiksh, Monai

Date Issued

August 1, 2010

Type

Article

DOI

10.1142/S0218126610006530

Abstract

This paper describes the design and implementation of an RF CMOS quadrature LC voltage-controlled oscillator in a 0.35 μm technology. The proposed oscillator employs the switched tail transistor topology and differential switch capacitor tuning to achieve low phase noise operation. A modified series coupling mechanism is used for quadrature signal generation with wide output signal swing. The oscillator core circuit was designed to operate with a 2.5 V power supply voltage with a 4 mA total supply current. Measurement results showed that the prototype oscillator could achieve a nominal oscillation frequency of 2.2 GHz with -110 dBc/Hz phase noise at 1 MHz offset frequency. © 2010 World Scientific Publishing Company.

Citation

Journal of Circuits Systems and Computers, 19(5), 931-937, 2010

Subjects

CMOS oscillator

phase noise

quadrature

voltage-controlled os...