Premium
an 800‐MHz LC‐VCO with a Linear Control Characteristics in a 130‐nm CMOS Technology
Author(s) -
Lee Hui Dong,
Jung Jae Ho,
Lee Kwang Chun
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27723
Subject(s) - voltage controlled oscillator , varicap , dbc , phase noise , cmos , lc circuit , pmos logic , capacitance , electrical engineering , voltage , materials science , transistor , microwave , electronic engineering , optoelectronics , engineering , physics , capacitor , electrode , telecommunications , quantum mechanics
A semilinear LC‐voltage‐controlled oscillator (VCO) topology is proposed. To exploit a linear frequency tuning, the LC‐VCO adopts the variable capacitance block of the varactor devices and the PMOS transistors. This block has the capacitance characteristics which are approximately inversely proportional to the square of the VCO control voltage. The proposed LC‐VCO is implemented in a 130‐nm CMOS technology. The measurement results show a semilinear frequency range of 503–873 MHz and a phase noise of −128 dBc/Hz at 1 MHz offset frequency. Power consumption is about 2 mA from a 1.2 V supply. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1972–1975, 2013