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An E‐band digitally controlled oscillator with effective tuning bank
Author(s) -
Tang Lu,
Liu Peng,
Zhang Youming,
Tang Xusheng,
Xia Sicong,
Huang Fengyi,
Zhang Changchun
Publication year - 2020
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.32352
Subject(s) - digitally controlled oscillator , capacitor , cmos , dbc , figure of merit , fine tuning , electronic oscillator , electronic engineering , varicap , electrical engineering , materials science , variable frequency oscillator , voltage controlled oscillator , optoelectronics , physics , engineering , local oscillator , radio frequency , capacitance , voltage , electrode , quantum mechanics
An E‐band digitally controlled oscillator (DCO) with effective tuning bank is presented and fabricated in 40 nm CMOS technology. The DCO is promoted with an effective fine tuning bank based on a binary‐weighted switched capacitors array connected with the secondary coil of an effective flipped stacked transformer with weak mutual coupling factor to improve the tradeoff relationship among tuning range, circuit complexity and frequency resolution. The measured best fine tuning step of the DCO is 2.21 MHz. The operating frequencies range of the DCO covers from 76.61 to 84.51 GHz. The DCO also achieves a figure of merit normalized for area (FoM A ) of −185.1 dBc/Hz.