An E‐band digitally controlled oscillator with effective tuning bank. Issue 7 (6th March 2020)

• Record Type: Journal Article
• Authors: Tang, Lu; Liu, Peng; Zhang, Youming; Tang, Xusheng; Xia, Sicong; Huang, Fengyi; Zhang, Changchun
• Is Part Of: Microwave and optical technology letters. Volume 62:Issue 7(2020:Jul.)
• Page Start: 2493
• Page End: 2498
• Publication Date: 2020-03-06
• Subjects: CMOS -- DCO -- E‐band -- transformer -- tuning bank; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.32352
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: 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 (FoMA ) of −185.1 dBc/Hz.