Title :
A GaAs upconverter MMIC with an automatic gain control amplifier for 1.9 GHz PHS
Author :
Ma, Huainan ; Fang, Sher Jiun ; Lin, Fujiang ; Tan, Khen-Sang ; Shibata, Junichi ; Tamura, Atsushi ; Nakamura, Hiroshi
Author_Institution :
Wireless IC Design Cente, Fujitsu Microelectron., Dallas, TX, USA
fDate :
9/1/1998 12:00:00 AM
Abstract :
A newly developed GaAs upconverter MMIC with an automatic gain control (AGC) amplifier is presented. The design objectives, considerations, problems, and their solutions are described. The circuit is designed for a 1.9 GHz radio-frequency transceiver for the Japanese Personal Handyphone System applications. The features of the upconverter are: (1) on-chip 50 Ω impedance matching for all AC input and output signals; (2) a doubly balanced Gilbert cell and a two-stage AGC amplifier with matching circuits that provide 23.0 dB conversion gain, -39 dBc LO suppression, -23 dBc image suppression, and 30 dB gain control; (3) an adjacent channel power of -70 dBc, and (4) a die size of only 2.87 mm2 (2.52 mm×1.14 mm)
Keywords :
III-V semiconductors; MMIC amplifiers; MMIC frequency convertors; automatic gain control; gallium arsenide; impedance matching; mobile radio; telephone sets; transceivers; 1.9 GHz; GaAs; GaAs upconverter MMIC; Gilbert cell; LO suppression; PHS; Personal Handyphone System; adjacent channel power; automatic gain control amplifier; conversion gain; die size; image suppression; impedance matching; radiofrequency transceiver; Circuits; Gain control; Gallium arsenide; Image converters; Impedance matching; MMICs; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Transceivers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
