Title :
A Fully-Integrated 580 μW ISM-Band Frequency Synthesizer for Implantable Medical Devices
Author :
Tanguay, Louis-François ; Sawan, Mohamad
Author_Institution :
Ecole Polystim Neurotechnol. Lab., Quebec
Abstract :
In this paper, a fully integrated ultra-low power integer-N frequency synthesizer for operation in the 902-928 MHz ISM band is presented. This phase-locked loop based synthesizer contains an on-chip 1.830 GHz LC voltage controlled oscillator followed by a divide-by-2 prescaler that generates both in phase and quadrature differential carrier signals. The synthesizer was implemented using STMicroelectronics CMOS 90-nm process, consumes less than 580 μW of power at a supply voltage of 1 V and occupies an area of 0.7×0.8 mm2. The frequency synthesizer will be used in the transceiver of an implantable wireless sensing microsystem (IWSM) dedicated to in vivo monitoring of biological parameters.
Keywords :
CMOS integrated circuits; biosensors; frequency synthesizers; phase locked loops; prescalers; prosthetics; wireless sensor networks; CMOS process; LC voltage controlled oscillator; biological parameters; divide-by-2 prescaler; frequency 1.830 GHz; frequency 902 MHz to 928 MHz; fully-integrated ISM-band frequency synthesizer; implantable medical devices; implantable wireless sensing microsystem; in vivo monitoring; phase-locked loop; quadrature differential carrier signals; size 90 nm; ultra-low power integer-N frequency synthesizer; voltage 1 V; CMOS process; Frequency synthesizers; Implantable biomedical devices; Phase locked loops; Power supplies; Signal generators; Transceivers; Voltage; Voltage-controlled oscillators; Wireless sensor networks;
Conference_Titel :
Signals, Circuits and Systems, 2007. ISSCS 2007. International Symposium on
Conference_Location :
Iasi
Print_ISBN :
1-4244-0968-3
Electronic_ISBN :
1-4244-0969-1
DOI :
10.1109/ISSCS.2007.4292643
