Title :
An X-band Transmission Line Based CMOS VCO with FM Modulation
Author :
Wang, Sen ; Wu, Hsien-Shun ; Tzuang, Ching-Kuang C.
Author_Institution :
Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei
Abstract :
An X-band voltage-controlled oscillator (VCO with frequency modulation (FM) capability is realized in a 0.18mum 1P6M CMOS technology. The characteristics of the VCO modulated by a 100KHz triangular waveform are presented and investigated. The passive components of the VCO are implemented by two-dimensional (2-D) complementary-conducting strip transmission lines (CCS TLs), varactors and metal-oxide-metal (MOM) capacitors for substrate coupling consideration. The measured VCO with free running phase noise of -83.2 dBc/Hz at 100KHz offset from the carrier. The compact VCO chip size is 330 times450mum2 excluding pads. Furthermore, the modulation bandwidth is up to 400MHz of the proposed VCO with direct FM modulation which could improve range resolution in a radar system
Keywords :
CMOS integrated circuits; MMIC oscillators; frequency modulation; transmission lines; varactors; voltage-controlled oscillators; 0.18 micron; 100 kHz; 2D complementary-conducting strip transmission lines; 400 MHz; CMOS technology; MMIC oscillators; X-band; frequency modulation; metal-oxide-metal capacitors; triangular waveform; voltage-controlled oscillator; CMOS technology; Capacitors; Carbon capture and storage; Frequency modulation; Message-oriented middleware; Strips; Transmission lines; Two dimensional displays; Varactors; Voltage-controlled oscillators; Voltage controlled oscillator; cmos; frequency modulation; transmission line;
Conference_Titel :
Silicon Monolithic Integrated Circuits in RF Systems, 2007 Topical Meeting on
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-9765-7
Electronic_ISBN :
0-7803-9765-7
DOI :
10.1109/SMIC.2007.322800
