Publicou 12 edições por ano
ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009
Indexed in
A 1-V SUPPLY VOLTAGE CONTROLLED OSCILLATOR FOR INTRAOCULAR PRESSURE MEASUREMENT
RESUMO
A 1-V supply LC (Inductive-Capacitive) VCO (Voltage Controlled Oscillator) for intraocular pressure measurement is presented. The VCO is fabricated in standard 0.18−μm CMOS (Complementary Metal Oxide Semiconductor) technology and occupies an active area of 700×750 μm2. Two varactors from the 0.18−μm process are used to emulate a MEMS (Micro Electro-Mechanical System) capacitive membrane response (pressure sensor). A response with very good linearity was achieved within a tuning range of 6%, which fits the MEMS pressure sensor variation range. The phase noise was −85 dBc/Hz at a 600−KHz offset from the carrier frequency at 500 MHz. The power consumption was 10 mW from a 1-V power supply.