DocumentCode :
25394
Title :
85-to-127 GHz CMOS Signal Generation Using a Quadrature VCO With Passive Coupling and Broadband Harmonic Combining for Rotational Spectroscopy
Author :
Jing Zhang ; Sharma, Navneet ; Wooyeol Choi ; Dongha Shim ; Qian Zhong ; Kenneth, K.O.
Author_Institution :
Excellence & Electr. Eng. Dept., Univ. of Texas at Dallas, Dallas, TX, USA
Volume :
50
Issue :
6
fYear :
2015
fDate :
Jun-15
Firstpage :
1361
Lastpage :
1371
Abstract :
A quadrature LC-VCO incorporating passive coupling and broadband harmonic combining for frequency multiplication by 4, and NMOS switched variable inductors is fabricated in 65 nm bulk CMOS to generate signals at 85 to 127 GHz. The passive quadrature coupling bypasses the need for a broadband on-chip bias-T, while reducing power consumption, phase noise, and the theoretical conversion loss for the 4th order harmonic generation by 3 dB over the linear superposition. The 39% frequency tuning range is at least 4x higher than the other CMOS implementations with center frequency over 90 GHz. At power consumption of 30-45 mW from a 1.5 V power supply, the measured output power varies from -15 to -23 dBm and phase noise at 10 MHz offset varies from -108 to -102 dBc/Hz over the output frequency range. These are sufficient for use in millimeter wave rotational spectroscopy.
Keywords :
CMOS analogue integrated circuits; field effect MIMIC; frequency multipliers; signal generators; voltage-controlled oscillators; 4th order harmonic generation; CMOS signal generation; NMOS switched variable inductors; broadband harmonic; broadband on-chip bias-T; frequency 85 GHz to 127 GHz; frequency multiplication; frequency tuning range; linear superposition; millimeter wave rotational spectroscopy; passive quadrature coupling bypasses; phase noise; power 30 mW to 45 mW; power consumption reduction; quadrature LC-VCO; size 65 nm; theoretical conversion loss; voltage 1.5 V; CMOS integrated circuits; Couplings; Harmonic analysis; Inductors; Switches; Tuning; Voltage-controlled oscillators; CMOS; frequency multiplication; millimeter wave; passive coupling; quadrature voltage controlled oscillator; rotational spectroscopy; wide frequency tuning range;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2015.2416312
Filename :
7084700
Link To Document :
بازگشت