Title :
An ultralow-power UHF transceiver integrated in a standard digital CMOS process: transmitter
Author :
Melly, Thierry ; Porret, Alain-Serge ; Enz, Christian C. ; Vittoz, Eric A.
Author_Institution :
Swiss Center for Electron. & Microtechnol., Neuchatel, Switzerland
fDate :
3/1/2001 12:00:00 AM
Abstract :
In the first part of the paper, also in this issue of the JOURNAL, the design of the frequency synthesizer and receiver section of an FSK transceiver was described. It operates in the 434-MHz ISM (Industrial, Scientific, Medical) band and is realized in a standard digital 0.5-μm CMOS process. This companion paper focuses on the realization of the transmitter section. It includes a power amplifier, an upconverter, and the circuit generating the baseband quadrature signals with a continuous phase modulation. The overall measured efficiency of the packaged circuit is higher than 38% for a 1.2-V supply and an output power reaching 10 dBm at 433 MHz. The system is designed to still operate at 1-V supply, delivering more than 1 mW with an efficiency higher than 15%
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; low-power electronics; transceivers; transmitters; 0.5 micron; 1 mW; 1.2 V; 15 percent; 38 percent; 434 MHz; ISM band; baseband quadrature signal generation; continuous phase modulation; digital CMOS process; power amplifier; transmitter; ultralow-power UHF transceiver; upconverter; wireless communication; Baseband; CMOS process; Circuits; Frequency shift keying; Frequency synthesizers; Power amplifiers; Power generation; Signal generators; Transceivers; Transmitters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
