Title :
A low-power 200-MHz receiver for wireless hearing aid devices
Author :
Deiss, Armin ; Huang, Qiuting
Author_Institution :
Microtune Inc., Plano, TX, USA
fDate :
5/1/2003 12:00:00 AM
Abstract :
The design of a low-power receiver for a wireless hearing aid system working in the 174-223-MHz range and its implementation in a 0.8-μm BiCMOS technology is shown. The chip comprises a low-noise amplifier, an RF mixer, a variable-gain IF amplifier, and a demodulator. The latter consists of a digital phase shifter and I/Q IF mixers, fifth-order Bessel filters, and dc amplifiers. Measurements demonstrate that merely 667 μA is consumed for the reception of an 8-ary phase-shift keying signal with a data rate of 336 kb/s. The receiver works with different modulation formats, including those carrying information in the amplitude.
Keywords :
BiCMOS integrated circuits; demodulators; hearing aids; low-power electronics; mixed analogue-digital integrated circuits; mixers (circuits); phase shift keying; superheterodyne receivers; 0.8 micron; 174 to 223 MHz; 336 kbit/s; 667 muA; BiCMOS; I/Q IF mixers; RF mixer; demodulator; digital phase shifter; fifth-order Bessel filters; low-noise amplifier; low-power receiver; modulation formats; phase-shift keying signal; variable-gain IF amplifier; wireless hearing aid devices; Auditory system; BiCMOS integrated circuits; Demodulation; Digital filters; Low-noise amplifiers; Phase measurement; Phase shifters; Radio frequency; Radiofrequency amplifiers; Semiconductor device measurement;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.810055
