Title :
A 1.9-GHz Si-bipolar variable attenuator for PHS transmitter
Author :
Otaka, Shoji ; Tanimoto, Hiroshi ; Watanabe, Shuji ; Maeda, Tadahiko
Author_Institution :
Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
A 4-dB step 28-dB variable attenuator for 1.9 GHz personal handy-phone system (PHS) transmitter was fabricated using silicon bipolar technology with fT of 15 GHz. Step accuracy within 1.2 dB and total vector modulation error of less than 4% are realized for -15 dBm output. The attenuator consumes 21 mA with 2.7-V power supply and occupies 1.1 mm×0.5 mm
Keywords :
UHF integrated circuits; attenuators; bipolar analogue integrated circuits; cordless telephone systems; elemental semiconductors; personal communication networks; quadrature amplitude modulation; radio transmitters; silicon; 1.9 GHz; 15 GHz; 2.7 V; 21 mA; PHS transmitter; bipolar variable attenuator; personal handy-phone system; power supply; quadrature modulator; step accuracy; total vector modulation error; Active circuits; Attenuators; Gallium arsenide; Power amplifiers; Power generation; Power supplies; Radio frequency; Radiofrequency amplifiers; Silicon; Transmitters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
