Title :
A 2.5 GHz BiCMOS image-reject front-end
Author_Institution :
Nat. Semicond., Santa Clara, CA, USA
Abstract :
A 2.5-GHz bipolar image-reject front-end that consists of an image-reject mixer, LNA (low-noise amplifier), bias, and power-down stages is described. All the required elements, including the mixer-phase shifts, are included on-chip. This front-end increases the system integration and decreases the size and complexity of wireless communications systems by eliminating the image filter. The front end is fabricated with a 15-GHz f/sub T/ BiCMOS process. The circuit was measured at DECT frequencies both in and out of its package. The conversion gain versus frequency is shown.<>
Keywords :
BiCMOS integrated circuits; MMIC; mixers (circuits); ultra-high-frequency amplifiers; 15 GHz; 2.5 GHz; BiCMOS process; DECT frequencies; LNA; MMIC; UHF; image-reject front-end; image-reject mixer; low-noise amplifier; mixer-phase shifts; power-down stages; BiCMOS integrated circuits; Chromium; Feedback; Filters; Frequency measurement; Impedance; Microwave measurements; Packaging; Radio frequency; Resistors;
Conference_Titel :
Solid-State Circuits Conference, 1993. Digest of Technical Papers. 40th ISSCC., 1993 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0987-1
DOI :
10.1109/ISSCC.1993.280021
