Open AccessLow‐power quadrature voltage‐controlled oscillator using current‐reuse and transformer‐based Armstrong topologies
Author(s) -
Ryu H.,
Ha K.W.,
Baek D.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.4043
Subject(s) - phase noise , dbc , electrical engineering , figure of merit , voltage controlled oscillator , transformer , cmos , voltage , electronic engineering , reuse , engineering , materials science , optoelectronics , waste management
A new low‐power current‐reuse quadrature voltage‐controlled oscillator (QVCO) is proposed. The proposed QVCO couples two complementary current‐reuse Armstrong voltage‐controlled oscillators (VCOs) using series coupling switches. The current‐reuse technique reduces the power consumption, and the transformer‐based Armstrong configuration improves the phase noise performance by increasing the negative G m of the VCO core. The proposed QVCO consumes 2.46 mW of power at 8.71 GHz from a 1.1 V supply. The measured phase noise is −113.3 dBc/Hz at the offset frequency of 1 MHz, and the figure of merit is −188.2 dBc/Hz. The frequency tuning range is from 8.34 to 9.13 GHz. The chip area is 700 × 340 μm 2 in a 0.13 μm CMOS process.