Title :
Low-power quadrature VCO design for medical implant communication service
Author :
Kim, Jeong Ki ; Jeong, Jihoon ; Ha, Dong Sam ; Lee, Hyung-Soo
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA, USA
Abstract :
This paper presents two different implementations of a low-power quadrature frequency source generator for medical implant communication service (MICS) applications. The first circuit uses a current-reuse VCO running at double the target frequency followed by a divide-by-two frequency divider. The circuit dissipates only 230 μW and achieves low phase noise of -127 dBc/Hz@1MHz. The second one adopts a parallel-coupling scheme to combine two current-reuse VCOs (P-QVCO). The circuit exhibits a moderate power consumption of 960 μW and achieves very low phase noise of -138 dBc/Hz@1MHz.
Keywords :
biomedical communication; biomedical electronics; circuit noise; frequency dividers; low-power electronics; phase noise; prosthetics; voltage-controlled oscillators; P-QVCO; circuit dissipation; current-reuse VCO; divide-by-two frequency divider; low phase noise; low-power quadrature VCO design; low-power quadrature frequency source generator; medical implant communication service application; parallel-coupling scheme; power 230 muW; power consumption; voltage-controlled oscillator; Couplings; Damping; Microwave integrated circuits; Phase noise; Power demand; Resistors; Voltage-controlled oscillators; Current-reuse VCO; MICS; P-QVCO; QVCO;
Conference_Titel :
Design and Diagnostics of Electronic Circuits & Systems (DDECS), 2011 IEEE 14th International Symposium on
Conference_Location :
Cottbus
Print_ISBN :
978-1-4244-9755-3
DOI :
10.1109/DDECS.2011.5783122
