Title :
Low power and low phase noise 5.7 GHz LC VCO in OOK transmitter for neurosensory application
Author :
Upadhyaya, Parag ; Rajashekharaiah, Mallesh ; Heo, Deukhyoun ; Rector, David M. ; Chen, Yi-Jan Emery
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
Abstract :
A 5.7 GHz fully integrated complementary LC voltage controlled oscillator (CLC VCO) has been designed in an inexpensive 0.25-μm digital CMOS process for low power neurosensory application. Consuming only 2mA of current from a 2.5 V power supply, the CLC VCO achieves a measured single-sideband phase noise of -92.75 dBc/Hz and -97.6 dBc/Hz at 600 KHz and 1.0 MHz offset frequency, respectively. The CLC VCO is able to output -5dBm of power at the single-ended output to a 50-Ohm load to meet demands of high-date rate short reach on-off keying (OOK) wireless transmission. Various low power techniques used to improve phase noise in the LC VCO are also discussed.
Keywords :
CMOS digital integrated circuits; amplitude shift keying; integrated circuit noise; low-power electronics; neurophysiology; phase noise; voltage-controlled oscillators; 1 MHz; 2 mA; 2.5 V; 5.7 GHz; 50 ohm; 600 kHz; LC voltage controlled oscillator; OOK transmitter; digital CMOS process; low power neurosensory application; on-off keying wireless transmission; single-sideband phase noise; CMOS process; Current measurement; Frequency measurement; Neurotransmitters; Noise measurement; Phase measurement; Phase noise; Power measurement; Power supplies; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516989
